https://wiki.seas.harvard.edu/geos-chem/api.php?action=feedcontributions&user=Kbowman&feedformat=atomGeos-chem - User contributions [en]2024-03-28T20:05:44ZUser contributionsMediaWiki 1.24.2https://wiki.seas.harvard.edu/geos-chem/index.php?title=Carbon_Cycle_Working_Group&diff=41613Carbon Cycle Working Group2019-05-08T14:55:13Z<p>Kbowman: </p>
<hr />
<div>All users interested in the GEOS-Chem carbon gas simulations (CO, CO2, CH4, etc.) are encouraged to subscribe to the carbon gases email list (click on the link in the [[#Contact information|contact information section]] below).<br />
<br />
== Contact information ==<br />
<br />
{| border=1 cellspacing=0 cellpadding=5<br />
|-valign="top"<br />
!bgcolor="#CCCCCC" width="300px"|Carbon Cycle Working Group Co-Chairs<br />
|width="600px"|<br />
*[mailto:kevin.bowman@jpl.nasa.gov Kevin Bowman]<br />
*[mailto:dbj@atmosp.physics.utoronto.ca Dylan B.A. Jones]<br />
<br />
|-valign="top"<br />
!bgcolor="#CCCCCC"|Carbon Cycle Working Group email list<br />
|<tt>geos-chem-carbon [at] g.harvard.edu</tt><br />
<br />
<br />
|-valign="top"<br />
!bgcolor="#CCCCCC"|To subscribe to email list<br />
|Either<br />
*Send an email to <tt>geos-chem-carbon+subscribe [at] g.harvard.edu</tt><br />
Or:<br />
*Go to the [https://groups.google.com/a/g.harvard.edu/forum/#!forum/geos-chem-carbon GEOS-Chem Carbon Cycle Google Group]<br />
*Click on '''Subscribe to this group'''<br />
<br />
|-valign="top"<br />
!bgcolor="#CCCCCC"|To unsubscribe from email list<br />
|Either<br />
*Send an email to <tt>geos-chem-adjoint+unsubscribe [at] g.harvard.edu</tt><br />
Or<br />
*Go to the [https://groups.google.com/a/g.harvard.edu/forum/#!forum/geos-chem-carbon GEOS-Chem Carbon Cycle Google Group]<br />
*Click on the '''My Settings''' button<br />
*Click on '''Leave this group'''<br />
<br />
|}<br />
<br />
--[[User:Bmy|Bob Y.]] ([[User talk:Bmy|talk]]) 16:37, 21 August 2015 (UTC)<br />
<br />
== Current Carbon Cycle Projects (please add yours!) ==<br />
{| border=1 cellspacing=0 cellpadding=5<br />
|- bgcolor="#cccccc"<br />
!width="75px"|Simulation<br />
!width="150px"|User Group <br />
!width="550px"|Description <br />
!width="150px"|Contact Person<br />
!width="150px"|Date Added<br />
<br />
|- bgcolor="#eeddee"<br />
!&nbsp;<br />
!&nbsp;<br />
!Projects using CH4 simulations<br />
!&nbsp;<br />
!&nbsp;<br />
<br />
|-<br />
|[[CH4 simulation|Methane]]<br />
|U. Edinburgh<br />
|Regional methane sources using surface in situ and GOSAT and IASI satellite observations and an ensemble Kalman filter<br />
|[mailto:ac.fraser@ed.ac.uk Annemarie Fraser]<br />
|10 Jun 2009<br />
<br />
|-<br />
|[[CH4 simulation|Methane]]<br />
|Purdue University<br />
|Methane sources in Pan-Arctic region<br />
|[mailto:tan80@purdue.edu Zeli Tan]<br />
|26 Nov 2012<br />
<br />
|-<br />
|[[CH4 simulation|Methane]]<br />
|Harvard<br />
|Improved methane simulation; Updated emission inventories; Inverse modeling; OSSEs<br />
|[http://jdmaasakkers.github.io/ Bram Maasakkers]<br>[http://people.seas.harvard.edu/~mpayer/ Melissa Sulprizio]<br>[https://scholar.harvard.edu/jsheng Jianxiong Sheng]<br>[http://www.prism.gatech.edu/~yzhang425/ Yuzhong Zhang]<br>[https://eps.harvard.edu/people/tia-scarpelli Tia Scarpelli]<br />
|16 Nov 2017<br />
<br />
|- bgcolor="#eeddee"<br />
!&nbsp;<br />
!&nbsp;<br />
!Projects using CO and/or Tagged CO simulations<br />
!&nbsp;<br />
!&nbsp;<br />
<br />
|-<br />
|[[Tagged CO simulation|Tagged CO]]<br />
|Harvard<br />
|Using tagged CO simulation to study transport in the UT/LS<br />
|[mailto:jliu@seas.harvard.edu Junhua Liu]<br />
|12 May 2011<br />
<br />
|-<br />
|[[Tagged CO simulation|Tagged CO]]<br />
|JPL<br />
|Using tagged CO simulations to interpret MLS observations<br />
|[mailto:jianjun.jin@jpl.nasa.gov Jianjun Jin]<br />
|12 May 2011<br />
<br />
|-<br />
|[[Tagged CO simulation|Tagged CO]]<br>and [[NOx-Ox-HC-aerosol|full chemistry]]<br />
|Duke<br />
|CO sources from biomass burning<br>(NOTE: Cross-listed under full-chemistry)<br />
|Prasad Kasibhatla<br />
|15 Jun 2009<br />
<br />
|-<br />
|[[Tagged CO simulation|Tagged CO]]<br />
|U. Toronto<br />
|Adjoint analysis of CO sources from MOPITT<br />
|[mailto:zjiang@atmosp.physics.utoronto.ca Zhe Jiang]<br />
|09 Jun 2009<br />
<br />
|- bgcolor="#eeddee"<br />
!&nbsp;<br />
!&nbsp;<br />
!Projects using CO2 simulations<br />
!&nbsp;<br />
!&nbsp;<br />
<br />
|-<br />
|[[CO2 simulation|CO2]]<br />
|Caltech<br />
|Source/sink estimation of CO<span><sub>2</sub> using ground-based FTS observations<br />
|[mailto:janina@caltech.edu Janina Messerschmidt]<br />
|26 Sept 2011<br />
<br />
|-<br />
|[[CO2 simulation|CO2]]<br />
|UEA<br />
|CO2 flux inversions<br />
|[mailto:zhaohui.chen@uea.ac.uk ZhaoHui Chen]<br />
|1 Jul 2011<br />
<br />
<br />
|-<br />
|[[CO2 simulation|CO2]]<br />
|U. Edinburgh<br />
|Using GEOS-Chem for CO2 flux inversions<br />
|James Barlow<br />
|12 May 2011<br />
<br />
|-<br />
|[[CO2 simulation|CO2]]/[[Tagged CO simulation|Tagged CO]]<br />
|Harvard<br />
|Using CO/CO2 correlations for CO2 inverse modeling<br />
|[mailto:wqq726@gmail.com Helen Wang]<br />
|12 May 2011<br />
<br />
<br />
|-<br />
|[[CO2 simulation|CO2]]<br />
|Tsinghua U.<br />
|Nested grid simulation to interpret surface CO<span><sub>2</sub> observations<br />
|[mailto:yxw@mail.tsinghua.edu.cn Yuxuan Wang]<br />
|12 May 2011<br />
<br />
|-<br />
|[[CO2 simulation|CO2]]<br />
|Environment Canada<br />
|CO<span><sub>2</sub> modeling and source/sink estimation<br />
|[mailto:ray.nassar@ec.gc.ca Ray Nassar]<br />
|11 Apr 2011<br />
<br />
|-<br />
|[[CO2 simulation|CO2]]<br />
|U. Edinburgh<br />
|CO<span><sub>2</sub> simulation and surface flux estimation by using Ensemble Kalman Filter<br />
|[mailto:lfeng@staffmail.ed.ac.uk Liang Feng]<br />
|18 Aug 2010<br />
<br />
|-<br />
|CO2/CO Adjoint<br />
|JPL<br />
|CO2 and CO assimilation into the NASA Carbon Monitoring System Flux (CMS-Flux) project<br />
|[mailto:kevin.bowman@jpl.nasa.gov Kevin Bowman]<br />
|28 Jun 2010<br />
<br />
|-<br />
|[[CO2 simulation|CO2]]<br />
|U. Toronto<br />
|Modeling CO<span><sub>2</sub> and its sources and sinks with GEOS-Chem<br />
|[mailto:dbj@atmosp.physics.utoronto.ca Dylan Jones]<br />
|09 Jun 2009<br />
<br />
|-<br />
|[[CO2 simulation|CO2]]<br />
|IUP U. Bremen<br />
|Study the CO2 and OCS relationship using ground-based FTS observations and GEOS-Chem<br />
|[mailto:w_yuting@iup.physik.uni-bremen.de Yuting Wang]<br />
|17 May 2014<br />
<br />
|-<br />
| CO2/CH4/CO<br />
| U. Wollongong<br />
|Joint simulation and source/sink estimation based on remote sensing and in situ (fixed and moving platforms) measurements in Australia<br />
|[mailto:bb907@uowmail.edu.au Beata Bukosa]<br />
|13 April 2017<br />
<br />
|-<br />
| CO2<br />
| FSU<br />
|Arctic CO2 transport and surface fluxes<br />
|[mailto:cdholmes@fsu.edu Chris Holmes] [mailto:kag16e@my.fsu.edu Kelly Graham]<br />
|May 2017<br />
|}<br />
<br />
== Recently Completed Projects (please add yours!) ==<br />
{| border=1 cellspacing=0 cellpadding=5<br />
<br />
|- bgcolor="#cccccc"<br />
!width="75px"|Simulation<br />
!width="150px"|User Group <br />
!width="550px"|Description <br />
!width="150px"|Contact Person<br />
!width="150px"|Publication<br />
<br />
|-<br />
|[[Tagged CO simulation|Tagged CO]]<br />
|Harvard<br />
|Adjoint analysis of CO sources from MOPITT/AIRS/SCIAMACHY<br />
|Monika Kopacz<br />
|Atmos. Chem. Phys., 10, 855-876, 2010. [http://acmg.seas.harvard.edu/publications/Kopacz_etal2010.pdf PDF]<br />
<br />
|}<br />
<br />
--[[User:Bmy|Bob Y.]] 15:40, 25 April 2014 (EDT)<br />
<br />
== Development Priorities ==<br />
<br />
{| border=1 cellspacing=0 cellpadding=5<br />
|- bgcolor="#cccccc"<br />
!width="250px"|Priority<br />
!width="500px"|Description<br />
!width="250px"|Status <br />
|-<br />
|Update biospheric CO2 fluxes<br />
|Currently based on CASA (neutral biosphere) output for one particular year and a climatology of net terrestrial exchange. Running with year-specific fluxes from the SiB3 biospheric model will be a new option. <br />
|Included in [[GEOS-Chem v10-01]]<br />
|-<br />
|Update anthropogenic CO2 fluxes <br />
|Implement anthropogenic (fossil fuel combustion) CO2 emissions with higher temporal resolution and perhaps higher spatial resolution.<br />
|Included in [[GEOS-Chem v10-01]]<br />
|-<br />
|Update ocean CO2 fluxes<br />
|Currently using Takahashi et al. (2009) which gives too weak of a global sink. Look into possibilities for scaling or improved ocean fluxes from another source.<br />
|Included in [[GEOS-Chem v10-01]] <br />
|-<br />
|[[Tagged CO simulation]] <br />
|Improve treatment of secondary production of CO from VOC oxidation. Currently just scale emissions. Modify code to apply photochemical production rates archived from a full chemistry simulation.<br />
| Work completed and described in Fisher et al., submitted to GMDD April 2017. To be included in v11-02 or later.<br />
|-<br />
|CO-CO2-CH4 simulation<br />
|Merge into a single offline simulation for the standard model.<br />
| In Development [mailto:bb907@uowmail.edu.au Beata Bukosa]<br />
|-<br />
|Improved satellite diagnostic <br />
|Implement more flexible diagnostic for saving out XCO2 and other satellite-relevant parameters.<br />
| <br />
|}<br />
<br />
--[[User:Melissa Payer|Melissa Payer]] 10:36, 10 June 2013 (EDT)<br />
--Updated by Ray Nassar 2015 April 14, 16:58 (EDT)<br />
<br />
== Recent updates ==<br />
<br />
The following development items have recently been added to GEOS-Chem:<br />
<br />
{| border=1 cellspacing=0 cellpadding=5 <br />
|-bgcolor="#CCCCCC" valign="top"<br />
!width="75px"|Version<br />
!width="75px"|Released<br />
!width="600px"|Description<br />
!width="250px"|Contact<br />
<br />
|-valign="top"<br />
|[[GEOS-Chem v10-01|v10-01]]<br />
|Jun 2015<br />
|[[CO2_simulation#Update_CO2_emissions|Simple Biosphere (SiB3) model balanced biosphere fluxes (2006-2010) for CO2 simulation]], implemented via [[HEMCO]]<br />
|Ray Nassar (Environment Canada)<br />
<br />
|-valign="top"<br />
|v10-01<br />
|Jun 2015<br />
|[[CO2_simulation#Update_CO2_emissions|Scaled Takahashi et al. (2009) Ocean CO2 fluxes for 2000-2013 for CO2 simulation]], implemented via [[HEMCO]]<br />
|Ray Nassar (Environment Canada)<br />
<br />
|-valign="top"<br />
|v10-01<br />
|Jun 2015<br />
|[[CO2_simulation#Update_CO2_emissions|ODIAC v2013 national fossil fuel combustion emissions for 2000-2014 for CO2 simulation]], implemented via [[HEMCO]]<br />
|Ray Nassar (Environment Canada)<br />
<br />
|-valign="top"<br />
|v10-01<br />
|Jun 2015<br />
|[[CO2_simulation#Update_CO2_emissions|TIMES weekly and diurnal fossil fuel temporal scaling factors for CO2 simulation]], implemented via [[HEMCO]]<br />
|Ray Nassar (Environment Canada)<br />
<br />
|-valign="top"<br />
|v10-01<br />
|Jun 2015<br />
|[[CO2_simulation#Update_CO2_emissions|Extended time range for CDIAC, chemical CO2 source, shipping and aviation scale factors for CO2 simulation]], implemented via [[HEMCO]]<br />
|Ray Nassar (Environment Canada)<br />
<br />
|-valign="top"<br />
|v10-01<br />
|June 2015<br />
|[[HEMCO|The HEMCO emissions component]] now handles all emissions in GEOS-Chem v10-01 and higher versions.<br />
|Christoph Keller (fmr Harvard)<br>[[GCST]]<br />
<br />
|-valign="top"<br />
|[[GEOS-Chem v9-02|v9-01]]<br />
|Mar 2014<br />
|[[CH4_simulation#Update_CH4_emissions_to_EDGAR_v4.2|EDGAR v4.2 emissions for CH4 simulation]]<br />
|Kevin Wecht (Harvard)<br />
|}<br />
<br />
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 15:38, 23 February 2016 (UTC)<br />
<br />
The following development items will soon be added to GEOS-Chem:<br />
<br />
{| border=1 cellspacing=0 cellpadding=5 <br />
|-bgcolor="#CCCCCC" valign="top"<br />
!width="75px"|Version<br />
!width="75px"|Released<br />
!width="600px"|Description<br />
!width="250px"|Contact<br />
<br />
|-valign="top"<br />
|[[GEOS-Chem v11-01|v11-01]]<br />
|TBD 2016<br />
|The FlexChem chemical solver will completely replace SMVGEAR. All full-chemistry simulations going forward will use FlexChem (which is based on the KPP solver package).<br />
|Mike Long (Harvard)<br>[[GCST]]<br />
<br />
|}<br />
<br />
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 15:38, 23 February 2016 (UTC)</div>Kbowmanhttps://wiki.seas.harvard.edu/geos-chem/index.php?title=GEOS-Chem_Adjoint&diff=32490GEOS-Chem Adjoint2017-04-30T17:24:41Z<p>Kbowman: /* Current GEOS-Chem Adjoint Research Projects (please add yours!) */</p>
<hr />
<div><big><big><strong>Adjoint Working Group</strong></big></big><br />
<br />
== Contact information ==<br />
<br />
{| border=1 cellspacing=0 cellpadding=5<br />
|-valign="top"<br />
!width="300px" bgcolor="#CCCCCC"|Adjoint Model Scientist<br />
|width="600px"|[mailto:daven.henze@colorado.edu Daven Henze]<br />
<br />
|-valign="top"<br />
!bgcolor="#CCCCCC"|Adjoint Model and Data Assimilation<br>Working Group Co-Chairs<br />
|<br />
*[mailto:kevin.bowman@jpl.nasa.gov Kevin Bowman], <br />
*[mailto:dbj@atmosp.physics.utoronto.ca Dylan B.A. Jones]<br />
<br />
|-valign="top"<br />
!bgcolor="#CCCCCC"|GEOS-Chem Adjoint support team<br />
|<br />
*[mailto:yanko.davila@colorado.edu Yanko Davila], <br />
<br />
|-valign="top"<br />
!bgcolor="#CCCCCC"|Adjoint Working Group email list<br />
|<tt>geos-chem-adjoint [at] g.harvard.edu</tt><br />
<br />
|-valign="top"<br />
!bgcolor="#CCCCCC"|To subscribe to email list<br />
|Either<br />
*Send an email to <tt>geos-chem-adjoint+subscribe [at] g.harvard.edu</tt><br />
Or<br />
*Go to [https://groups.google.com/a/g.harvard.edu/forum/#!forum/geos-chem-adjoint Adjoint Google Group], then<br />
*Click on '''Subscribe to this group'''<br />
<br />
|-valign="top"<br />
!bgcolor="#CCCCCC"|To unsubscribe from email list<br />
|Either<br />
*Send an email to <tt>geos-chem-adjoint+unsubscribe [at] g.harvard.edu</tt><br />
Or<br />
*Go to the [https://groups.google.com/a/g.harvard.edu/forum/#!forum/geos-chem-adjoint Adjoint Google Group], then<br />
*Click on the '''My Settings''' button<br />
*Click on '''Leave this group'''<br />
|}<br />
<br />
--[[User:Bmy|Bob Y.]] ([[User talk:Bmy|talk]]) 15:54, 21 August 2015 (UTC)<br />
<br />
== Historical Development ==<br />
Original work on the adjoint of GEOS-Chem v6 began in 2003, focusing on the adjoint of the offline aerosol simulation. By 2005, the adjoint was expanded to include a tagged CO simulation and a full chemistry simulation; an adjoint of GEOS-Chem v7 was also developed in the following years. Each of these branches of the adjoint code were been constructed in a hybrid fashion using a combination of automatic differentiation software ([http://www.autodiff.com/tamc TAMC], [http://people.cs.vt.edu/~asandu/Software/Kpp/ KPP]) and manual coding of both discrete and continuous adjoints. They shared many common elements yet had unique features for different applications. <br />
<br />
During the summer of 2009, the existing branches were merged and updated to bring the adjoint into alignment with the latest release of GEOS-Chem, v8-02-01. This merged adjoint model is now the standard adjoint code into which all further development efforts will be placed.<br />
<br />
== Forward Model Code ==<br />
<br />
The forward model on which the adjoint is based originally corresponded to GEOS-Chem v8-02-01. It was subsequently updated as follows:<br />
<br />
* KPP solver for gas-phase chemistry (as in GCv8-02-03)<br />
* Implement Bond 2007 BC/OC emissions (as in GCv8-02-02)<br />
* Apply bug fixes from GCv8-02-02 listed [http://wiki.seas.harvard.edu/geos-chem/index.php/GEOS-Chem_v8-02-02#Previous_issues_now_resolved_in_v8-02-02 here]<br />
* Apply bug fixes from GCv8-02-03 listed [http://wiki.seas.harvard.edu/geos-chem/index.php/GEOS-Chem_v8-02-03#Previous_issues_now_resolved_in_v8-02-03 here]<br />
* Apply bug fixes from GCv8-02-04 listed [http://wiki.seas.harvard.edu/geos-chem/index.php/GEOS-Chem_v8-02-04#Previous_issues_now_resolved_in_v8-02-04 here]<br />
<br />
All bug fixes and model updates were previous listed at the top of inverse_driver.f. We have now switched to documenting the code development cycle here in the wiki, see the following section. <br />
<br />
== Code Versions, Bug Fixes and Developments == <br />
<br />
=== Current GEOS-Chem adjoint version released ===<br />
*[[GEOS-Chem_Adjoint_v35]] (You will download this version when you check out.)<br />
<br />
=== Previous GEOS-Chem adjoint versions released ===<br />
*[[GEOS-Chem_Adjoint_v34]]<br />
*[[GEOS-Chem_Adjoint_v33]] <br />
*[[GEOS-Chem_Adjoint_v32]]<br />
*[[GEOS-Chem_Adjoint_v31]]<br />
<br />
== Summary of Main Adjoint Code Supported Features ==<br />
<br />
=== Features === <br />
* Meteorological fields<br />
** GEOS-3 <i>needs testing</i><br />
** GEOS-4<br />
** GEOS-5 <br />
* model resolution<br />
** 4 x 5<br />
** 2 x 2.5 <br />
** Nested Asia and NA<br />
* Forward model processes<br />
** convection<br />
** advection<br />
** PBL mixing<br />
** dry deposition<br />
** wet deposition<br />
** strat / trop exchange with LINOZ and new GMI strat chem (v9-01-03)<br />
** NOy up fluxes (now replaced with new GMI strat chem)<br />
** aerosols <br />
*** inorganic aerosol thermodynamics with RPMARES<br />
*** inorganic aerosol thermodynamics with ISORROPIA <i> in progress </i><br />
*** sulfate chemistry <br />
*** BC<br />
*** SOA, Dust, sea salt <i> needs doing </i><br />
*** aerosol surface area feedbacks <i> needs updating </i><br />
*** aerosol optical feedbacks <i> needs doing </i><br />
** emissions<br />
*** all standard emissions included<br />
* Simulation modes<br />
** full chemistry<br />
** tagged CO<br />
** tagged Ox <br />
** CH4<br />
** offline aerosols (for BC and dust only)<br />
** CO2<br />
* Observational Operators<br />
** MOPITT CO column<br />
** SCIAMACHY CO column<br />
** AIRS CO column<br />
** IMPROVE BC<br />
** CASTNet (NH4+) <i> needs updating </i> <br />
** GOME / SCIAMACHY NO2 column <i> needs updating </i> <br />
*** using KNMI retrieval (Henze)<br />
*** using Dalhousie retrieval (Shim)<br />
** SCIAMACHY/OMI NO2<br />
*** using Dalhousie retrieval (Bousserez, Padmanabhan)<br />
** TES NH3 <br />
** TES O3 <br />
** GOSAT CO2 <br />
** MLS O3 and TES CO2 <i> in progress </i><br />
* Control parameters<br />
** Initial Conditions scaling factors (linear or log)<br />
** Emissions scaling factors (linear or log) <br />
*** NH3, primary BC/OC, SO2: anthropogenic, natural, bioburn, biomass, ship<br />
*** NOx: soil, aircraft, anthropogenic, biofuel, bioburn<br />
*** Lightning NOx: injection height, yield <i> in progress </i><br />
*** all other gas-phase tracers: anthropogenic, biofuel, bioburn <br />
* Adjoint sensitivities<br />
** w.r.t. all implemented control parameters<br />
** w.r.t Reaction Rate Parameters <br />
** w.r.t all emissions <br />
** of AQ attainment metrics <i> needs updating </i><br />
** of spatiotemporally averaged species concentrations (e.g., arctic O3) <br />
* Other<br />
** Inverse Hessian approximation <br />
** off-diagonal covariance matrices <i> needs updating </i><br />
** 3D-Var <i> needs updating </i><br />
<br />
Features may be qualified as: <br />
* <i>needs testing</i>: an implemented feature that we haven't fully used yet<br />
* <i>needs updating</i>: a feature developed with a previous branch that has yet to be updated to GEOS-Chem v8 and the merged adjoint<br />
* <i>needs doing</i>: a feature nobody has tackled the adjoint of yet<br />
* <i>in progress</i>: a feature currently under development <br />
* <i>in pipeline</i>: a feature which has been submitted and awaiting integration into the CVS repository<br />
<br />
=== Primary code developers ===<br />
Monika Kopacz, Kumaresh Singh, Changsub Shim, Daven Henze<br />
<br />
=== Adjoint model lead scientist ===<br />
Daven Henze<br />
<br />
<br />
<br />
== Resources ==<br />
<br />
=== User's guide ===<br />
A User's Guide v35 is available. [http://adjoint.colorado.edu/~yanko/gcadj_std/gc_adj_man.pdf User's Guide v35] <br />
<br />
Previous version v32-v33 available at [http://adjoint.colorado.edu/~daven/gcadj_std/GC_adj_man.pdf User's Guide v32]<br />
<br />
Quick Introduction to GitLab is available at [http://adjoint.colorado.edu/~yanko/gcadj_std/GitLab_Tutorial.pdf GitLab Tutorial]<br />
<br />
The forward version of the code is based on v9-02 here is the [http://acmg.seas.harvard.edu/geos/doc/archive/man.v9-02/ User's Guide]<br />
<br />
=== Code flowchart ===<br />
Meemong Lee has created a detailed flowchart of the inverse model code structure. http://adjoint.colorado.edu/~daven/gcadj_std/flowchart.pdf<br />
<br />
=== Plotting tools ===<br />
<br />
Some IDL and MATLAB routines for plotting benchmark results. http://adjoint.colorado.edu/~daven/gcadj_std/tools.tar.gz<br />
<br />
=== Background papers and presentations ===<br />
<br />
Several articles and presentations (including a GC adjoint modeling clinic overview from IGC5) providing background information about adjoints. http://adjoint.colorado.edu/~daven/gcadj_std/adj_articles.tar.gz<br />
<br />
== Distribution and Use ==<br />
Code for the adjoint is distributed through GITLAB, a web interface connected to a GIT server located at adjoint.colorado.edu. You can access GITLAB at http://adjoint.colorado.edu:8080 after your account is created. Here is our [[Quick Start Guide]]. <br />
<br />
Even if your office mate has a copy of the code, the best way to obtain the model is to get an account for yourself and download a version from the repository. So please do not copy code directly from others or pass the code along to third parties. This vastly helps with tracking developments and keeping up with model updates. <br />
<br />
Use of the adjoint model code follows standard practice for GEOS-Chem. It is expected that any developments that come of individual applications based on this community model will eventually be given back to the community by incorporation of new developments into the standard adjoint code. New development should be submitted to Daven Henze for inclusion in the standard adjoint model code.<br />
<br />
Using GIT gives the users the ability to change the code and commit their changes without affecting the main repository hosted at adjoint.colorado.edu. Users can work with their modified versions of the code and even create their own tags because GIT acts as a local repository. When ready to submit your update to the community just create a new branch with your modifications. Send an email Daven Henze explaining your contributions and we'll do our best to include them as soon as possible.<br />
<br />
=== Quick guide to GIT === <br />
As of version 34 we started using git versioning system and the GitLab web interface. We prepared [http://adjoint.colorado.edu/~yanko/gcadj_std/GitLab_Tutorial.pdf GitLab Tutorial] to help users get used to the web interface and git. We recommend first taking a look at GIT manual to get a general feel for how this tools works (e.g., [http://git-scm.com/documentation GIT Documentation] or [http://www.kernel.org/pub/software/scm/git/docs/git.html GIT Manual Page]). <br />
<br />
<br />
Useful GIT commands: <br />
<br />
Initial download:<br />
git clone ssh://git@adjoint.colorado.edu/yanko.davila/gcadj_std.git<br />
<br />
Status of project vs the current repository:<br />
git status<br />
<br />
Check difference of files (differences have colors for easy reading)<br />
git diff --color <wildcard> [<wildcard>] <path>/foo_mod.f<br />
<br />
Checkout specific version<br />
git checkout <wildcard><br />
<br />
Replacing a file with the newest version from the repository:<br />
git checkout origin/master -- <path>/foo_mod.f<br />
<br />
Merging changes in a file: ([http://www.kernel.org/pub/software/scm/git/docs/git-merge.html Reference])<br />
git merge -m <wildcard> <br />
<br />
Comitting<br />
git commit -a<br />
<br />
Tagging a version<br />
git tag -a TAGNAME<br />
<br />
Deleting a tag<br />
git tag -d TAGNAME<br />
git push origin :refs/tags/TAGNAME<br />
<br />
Saving changes to repository<br />
git push<br />
<br />
Saving tags to repository<br />
git push --tags<br />
<br />
List the history of a file:<br />
git log -- <path>/foo_mod.f<br />
<br />
Add a file to the repository<br />
git add <file_name><br />
<br />
Delete a file from the repository<br />
git rm <file_name><br />
<br />
Determine current version<br />
git show HEAD [ | grep commit]<br />
<br />
Download remote changes, rewind your local branch, then replays all your changes over the top of your current branch one by one, until you’re all up to date.<br />
git pull --rebase<br />
<br />
There are several wildcards that you can use on git for example:<br/><br />
''"origin/master"'' - Latest version on the repository <br/><br />
''"HEAD"'' - Latest version as of your last download <br/><br />
''"[http://adjoint.colorado.edu:8080/gcadj_std/commits/72773d7b1a7bd757957d2c186acb3dbb107d5323 v33i]"'' - Specific TAG, find all tag names on GitLab<br/><br />
''"[http://adjoint.colorado.edu:8080/gcadj_std/commits/32d5c926ef529c1dfc640c9dec4a925b24db575c 32d5c926e]"'' - Specific COMMIT, find all commit numbers on GitLab <br/><br />
<br />
[[Using_Git_with_GEOS-Chem|Here is the foward model documentation of git.]]<br />
<br />
=== Backward compatibility (CVS) === <br />
<br />
For people using old version of the code we still have active our CVS repository, but note that the latest version on CVS is v33i-patch2. Here you can find our [[Quick Guide to CVS]]<br />
<br />
== Crediting GEOS-Chem adjoint developers ==<br />
<br />
We aim to make distribution of adjoint model code as immediate as possible. A consequence is that many features may not yet be publicly documented. Therefore, giving code developers due credit is of utmost importance. <br />
<br />
Authors of new additions to the standard code should be offered co-authorship on the first round of presentations and publications to come of their development. Features currently falling in this category and their developers are:<br />
<br />
* (v35j) MOPITT CO Observation operator. Zhe Jiang; Yanko Davila, CU Boulder. <br />
* (v35j) OMI SO2, OMI NO2 and TES O3 Observation operators. Martin Keller, U Toronto; Yi Wang, UNL; Yanko Davila, CU Boulder. <br />
* (v35) HTAP Emissions Inventory. Kateryna Lapina, Daven Henze and Yanko Davila, CU Boulder.<br />
* (v35) NEI2008 Emissions Inventory. Katie Travis; Fabien Paulot, Harvard; Hyungmin Lee, and Daven Henze, CU Boulder. <br />
* (v35) Deposition based cost function. Fabien Paulot, Harvard; Daven Henze and Yanko Davila, CU Boulder. <br />
* (v34) Implementation of the sensitivity to reaction rate constants. Developers: Hyungmin Lee, CU Boulder; Thomas ; Fabien Paulot (Harvard); Daven Henze, CU Boulder and Yanko Davila, CU Boulder. <br />
* (v34) ISOROPIA II adjoint. Developer: Shannon Capps, EPA.<br />
* (v34) Off-diagonal covariance error matrices implementation. Developers: Nicolas Bousserez, CU Boulder; Kumaresh; Yanko Davila, CU Boulder. <br />
* (v32) Nested full chemistry adjoint. Developers: Zhe Jiang, University of Toronto; Daven Henze, CU Boulder.<br />
<br />
<br />
Citation of the appropriate [[GEOS-Chem_Adjoint#Journal_Articles|journal articles]] for mature developments is also encouraged, as well as considering aspects of [http://acmg.seas.harvard.edu/geos/geos_credit.html co-authorship for the forward model]. <br />
<br />
Overall, if you have any questions about authorship, even for a conference presentation, please contact Daven Henze.<br />
<br />
== Current GEOS-Chem Adjoint Research Projects (please add yours!) ==<br />
{| border=1 cellspacing=0 cellpadding=5<br />
|- bgcolor="#cccccc"<br />
!User Group <br />
!Description <br />
!Contact Person<br />
|-<br />
<br />
|-<br />
|Anyang University<br />
|Aerosol emission modeling in East Asia <br />
|[mailto:koo@anyang.ac.kr Youn Seo Koo]<br />
|-<br />
<br />
|-<br />
|CRAES<br />
|source attribution of PM in eastern China<br />
|[mailto:weipeng@craes.org.cn Wei Peng]<br />
|-<br />
<br />
<br />
|-<br />
|CU Boulder<br />
|Aerosol precursors, CO2, O3; general adjoint code maintenance<br />
|[mailto:daven.henze@colorado.edu Daven Henze]<br />
|-<br />
|CU Boulder<br />
|Inverse modeling/optimization: variational source inversions, posterior error estimates in high-dimension; general adjoint code maintenance<br />
|[mailto:daven.henze@colorado.edu Nicolas Bousserez]<br />
|-<br />
|CU Boulder<br />
|Constraints on Aerosol Sources<br />
|[mailto:zhen.qu@colorado.edu Zhen Qu]<br />
|-<br />
<br />
|-<br />
|Dalhousie University<br />
|Mass balance vs adjoint approaches for top-down constraints on NOx emissions<br />
|Matthew Cooper<br />
|-<br />
|Dalhousie University<br />
|Trends in OC and BC emissions over the US <br />
|Nathaniel Egan-Pimblett<br />
|-<br />
|Dalhousie University<br />
|Sensitivity of global PM2.5-induced mortality to emissions<br />
|[mailto:colin.lee@dal.ca Colin Lee]<br />
|-<br />
|Dalhousie University<br />
|Global contribution to the black carbon in the Arctic<br />
|[mailto:Junwei.Xu@Dal.Ca Junwei Xu]<br />
|-<br />
<br />
<br />
|-<br />
|Drexel<br />
|ISORROPIA adjoint development; NH3 assimilation; cloud droplet sensitivities<br />
|[mailto:sc3623@drexel.edu Shannon Capps]<br />
|-<br />
<br />
|-<br />
|Harvard<br />
|Methane<br />
|[mailto:maasakkers@seas.harvard.edu Bram Maasakkers]<br />
|-<br />
|Harvard<br />
|Harvard Emissions Component (HEMCO)<br />
|[mailto:ckeller@seas.harvard.edu Christoph Keller]<br />
|-<br />
|Harvard<br />
|VOC emissions in N.A. constrained by satellite HCHO<br />
|[mailto:jkaiser@seas.harvard.edu Jennifer Kaiser]<br />
|-<br />
|Harvard<br />
|Tradeoffs between air quality and economic outcomes<br />
|[mailto:seastham@fas.harvard.edu Sebastian D Eastham]<br />
|-<br />
<br />
|-<br />
| JAMSTEC<br />
|Multiple-constituent satellite data assimilation<br />
|[mailto:kmiyazaki@jamstec.go.jp Kazuyuki Miyazaki]<br />
|-<br />
<br />
|-<br />
|JPL<br />
|3D-var Microwave Limb Sounder (MLS) and Tropospheric Emission Spectrometer (TES) ozone assimilation <br />
|[mailto:meemong.lee@jpl.nasa.gov Meemong Lee]<br />
|-<br />
|JPL <br />
| TES ozone assimilation/attribution of GHG radiative forcing<br />
|[mailto:kevin.bowman@jpl.nasa.gov Kevin Bowman]<br />
|-<br />
|JPL <br />
| Carbon Monitoring System Flux (CMS-Flux) 4D-var and LETKF assimilation<br />
|[mailto:kevin.bowman@jpl.nasa.gov Kevin Bowman]<br />
|-<br />
|JPL <br />
| Adjoint sensitivity analysis for satellite constellation design<br />
|[mailto:kevin.bowman@jpl.nasa.gov Kevin Bowman]<br />
|-<br />
|-<br />
|MIT<br />
|Air quality, aircraft emissions and sensitivities<br />
|[mailto:kingshuk@mit.edu Kingshuk Dasadhikari]<br />
|-<br />
|MIT<br />
|Air quality, aircraft emissions and sensitivities<br />
|[mailto:dedoussi@mit.edu Irene Dedoussi]<br />
|-<br />
<br />
|-<br />
|Nanjing University<br />
|Inverse modeling of terrestrial ecosystem carbon flux<br />
|[mailto:hengmao.wang@gmail.com Hengmao Wang]<br />
|-<br />
<br />
|-<br />
|NCAR<br />
|Adjoint analysis for carbon monoxide and ozone<br />
|[mailto:zhejiang@ucar.edu Zhe Jiang]<br />
|-<br />
<br />
|-<br />
|Peking University<br />
|Satellite constraints on VOC emissions <br />
|[mailto:tmfu@pku.edu.cn May Fu]<br />
|-<br />
|Peking University<br />
|Source attributions of tropospheric ozone over North China<br />
|[mailto:linjt@pku.edu.cn Jintai Lin]<br />
|-<br />
|Peking University<br />
|Satellite Health impact analysis of China interregional pollution trade<br />
|[mailto:1300011409@pku.edu.cn Liu Yang]<br />
|-<br />
|Peking University<br />
|Emissions and chemistry of VOCs in China.<br />
|[mailto:qische@gmail.com Qi Chen]<br />
|-<br />
<br />
|-<br />
|Purdue University<br />
|Feedback between terrestrial ecosystem processes and atmospheric CO2 signals<br />
|[mailto:zhuq@purdue.edu Qing Zhu]<br />
|-<br />
|Purdue University<br />
|Feedback between aquatic ecosystem processes and atmospheric CH4 signals<br />
|[mailto:tan80@purdue.edu Zeli Tan]<br />
|-<br />
<br />
|-<br />
|Seoul National University <br />
|Sensitivity and Inverse Modeling of Air Pollution in Korea<br />
|[mailto:hyungmin.lee@colorado.edu Hyung-Min Lee]<br />
|-<br />
|Seoul National University <br />
|Emissions and chemistry of aerosols in East Asia<br />
|[mailto:ss99@snu.ac.kr Jaein Jeong]<br />
|-<br />
<br />
|-<br />
|Tsinghua University<br />
|Inverse modeling of anthropogenic emissions over East Asia<br />
|[mailto:qiangzhang@tsinghua.edu.cn Qiang Zhang]<br />
|-<br />
|Tsinghua University<br />
|Nested-gird simulations with the adjoint model<br />
|[mailto:nany12@mails.tsinghua.edu.cn Nan Yang]<br />
|-<br />
<br />
|-<br />
|UCLA<br />
|Constrain black carbon emission<br />
|[mailto:qiling@atmos.ucla.edu Ling Qi]<br />
|-<br />
|UCLA<br />
|source attribution of ozone in the western U.S.<br />
|[mailto:gaomei@atmos.ucla.edu Mei Gao]<br />
|-<br />
<br />
|-<br />
|University of Edinburgh<br />
|Ozone sensitivity in biomass burning plumes<br />
|[mailto:d.finch@ed.ac.uk Douglas Finch]<br />
|-<br />
<br />
|-<br />
| University of Florida<br />
|Nitrogen deposition related to climate strategy projections with GCAM<br />
|[mailto:cbaublitz@ufl.edu Colleen Baublitz], [mailto:barronh@ufl.edu Barron H. Henderson]<br />
|-<br />
<br />
|-<br />
|University of Minnesota<br />
|Inverse modeling of VOC sources based on TES and IASI measurements<br />
||[mailto:kcw@umn.edu Kelley Wells], [mailto:dbm@umn.edu Dylan Millet]<br />
|-<br />
|University of Minnesota & CU Boulder<br />
|Inverse modeling of N2O sources<br />
|[mailto:dbm@umn.edu Dylan Millet], [mailto:Daven.Henze@Colorado.EDU Daven Henze]<br />
|-<br />
<br />
|-<br />
|University of Toronto<br />
|Methane inverse modeling<br />
|[mailto:stanevich@atmosp.physics.utoronto.ca Ilya Stanevich]<br />
|-<br />
|University of Toronto<br />
|Sensitivity of ozone and CO to precursor emissions<br />
|[mailto:cwhaley@atmosp.physics.utoronto.ca Cynthia Whaley]<br />
|-<br />
|University of Toronto<br />
|Data assimilation of atmospheric CO and CO2<br />
|[mailto:tailong.he@mail.utoronto.ca Tailong He]<br />
|-<br />
<br />
|-<br />
|University of Wisconsin<br />
|CO2 assimilation and forecast & Temperature profile retrieval <br />
|[mailto:wenguang.bai@ssec.wisc.edu Wenguang Bai]<br />
|-<br />
<br />
|-<br />
|University of Wollongong<br />
|Sensitivity of ozone and adjoint analysis of CO over Australasia.<br />
|[mailto:rb864@uowmail.edu.au Rebecca Buchholz]<br />
|-<br />
<br />
<br />
|-<br />
|USTC<br />
|assimilation & sensitivies of CO2<br />
|[mailto:tuang372@gmail.com Li Tuang]<br />
|-<br />
<br />
|-<br />
|Yangtze River Delta Center for Environmental Meteorology Prediction and Warning<br />
|Air quality, anthropogenic emissions and sensitivities<br />
|[mailto:guyixuan@mail.iap.ac.cn Yixuan Gu]<br />
|}<br />
<br />
== Publications ==<br />
<br />
=== Journal Articles ===<br />
<br />
* '''In press or sumbitted'''<br />
**Turner, A. J., D. J. Jacob, K. J. Wecht, J. D. Maasakkers, S. C. Biraud, H. Boesch, K. W. Bowman, N. M. Deutscher, M. K. Dubey, D. W. T. Griffith, F. Hase, A. Kuze, J. Notholt, H. Ohyama, R. Parker, V. H. Payne, R. Sussmann, V. A. Velazco, T. Warneke, P. O. Wennberg, and D. Wunch, Estimating global and North American methane emissions with high spatial resolution using GOSAT satellite data, submitted to Atmos. Chem. Phys.<br />
**Turner, A. J. and D. J. Jacob, Balancing aggregation and smoothing errors in inverse models, submitted to Atmos. Chem. Phys.<br />
**Liu, J., Bowman, K., and Henze, D., Source-receptor relationships of column-average CO2 and implications for the impact of observations on flux inversions. JGR-Atmosphere, in press.<br />
**Whaley, C. H., K. Strong, D. B. A. Jones, T. W. Walker, Z. Jiang, D. K. Henze, M. Cooke, C. A. McLinden, M. Pommier, R. L. Mittermeier, P. F. Fogal, Improvements to our understanding of urban ozone air pollution: Sources of Toronto-area ozone during poor air quality events, submitted.<br />
**Zhao, Y. H., L. Zhang, Y. P. Pan, Y. S. Wang, F. Paulot, and D. K. Henze, Atmospheric nitrogen deposition to the northwestern Pacific: seasonal variation and source attribution, submitted.<br />
**Lapina, K., D. K. Henze, J. B. Milford, C. Cuvelier, and M. Seltzer, Implications of RCP Scenarios for future changes in vegetative exposure to ozone in the Western U.S., Geophys. Res. Let., in press.<br />
**Zhang, L., L. Licheng, Y. Zhao, S. Gong, X. Zhang, D. K. Henze, S. L. Capps, T.-M. Fu, Q. Zhang, Source attribution of particulate matter pollution over North China with the adjoint method, submitted.<br />
**Walker, T. W., D. B. A. Jones, D. K. Henze, Z. Jiang, M. Parrington, F. Paulot, and Y. Rochon, Adjoint sensitivity analysis of North American surface ozone concentrations: Implications for dry deposition, submitted.<br />
**Keller, M, D. B. A. Jones, Z. Jiang, D. K. Henze, and H. Worden, Quantifying model biases in CO emission estimation using weak constraint 4D-Var, submitted.<br />
**Bousserez, N., D. K. Henze, B. Rooney, A. Perkins, K. J. Wecht, A. J. Turner, V. Natraj, J. R. Worden, Constraints on methane emissions in North America from future geostationary remote sensing measurements, submitted.<br />
<br />
* '''2016'''<br />
**Tan, Z., Q. Zhuang, D. K. Henze, C. Frankenberg, E. Dlugokencky, C. Sweeney, A. J. Turner, M. Sasakawa, T. Machida, Inverse modeling of pan-Arctic methane emissions at high spatial resolution: what can we learn from assimilating satellite retrievals and using different process-based wetland and lake biogeochemical models?, Atmos. Chem. Phys., 16, 12649–12666, doi:10.5194/acp-16-12649-2016.<br />
<br />
* '''2015'''<br />
**Zhang, L., D. K. Henze, G. A. Grell, G. R. Carmichael, N. Bousserez, Q. Zhang, J. Cao, O. Torres, C. Ahn, Z. Lu, Y. Mao, Constraining black carbon aerosol over Southeast Asia using OMI aerosol absorption optical depth and the adjoint of GEOS-Chem, Atmos. Chem. Phys., 15, 10281-10308, doi:10.5194/acp-15-10281-2015.<br />
**Patrick S. Kim, Daniel J. Jacob, Loretta J. Mickley, Shannon N. Koplitz, Miriam E. Marlier, Ruth S. DeFries, Samuel S. Myers, Boon Ning Chewf, Yuhao H. Mao, Sensitivity of population smoke exposure to fire locations in Equatorial Asia, doi:10.1016/j.atmosenv.2014.09.045<br />
**Deng, F., D. B. A. Jones, T. W. Walker, M. Keller, K. W. Bowman, D. K. Henze, R. Nassar, E. A. Kort, S. C. Wofsy, K. A. Walker, A. E. Bourassa, and D. A. Degenstein, Sensitivity analysis of the potential impact of discrepancies in stratosphere-troposphere exchange on inferred sources and sinks of CO2, Atmos. Chem. Phys. Discuss., 15, 10813-10851, doi:10.5194/acpd-15-10813-2015.<br />
**Jiang, Z., D. B. A. Jones, J. R. Worden, H. M. Worden, D. K. Henze, Y. X. Wang, Regional data assimilation of multi-spectral MOPITT observations of CO over North America, Atmos. Chem. Phys. Discuss., 15, 5327-5358, doi:10.5194/acpd-15-5327-2015.<br />
**Zhu, L., D. K. Henze, J. Bash, G. Jeong, K. Cady-Pereira, M. Shephard, M. Luo, F. Paulot, and S. Capps, Global evaluation of ammonia bi-directional exchange, Atmos. Chem. Phys. Discuss., 15, 4823-4877, doi:10.5194/acpd-15-4823-2015.<br />
**Jiang, Z., J. R. Worden, D. B. A. Jones, J.-T. Lin, W. Verstraeten, and D. K. Henze, Constraints on Asian ozone using Aura TES, OMI and Terra MOPITT, Atmos. Chem. Phys., 15, 99-112.<br />
**Lee, C.J., R.V. Martin, Henze D.K., Brauer M., Cohen A., and A. van Donkelaar, Sensitivity of global particulate-matter-related mortality to local precursor emissions, Environ. Sci. Technol., 49(7), 4335–4344, doi:10.1021/acs.est.5b00873, 2015.<br />
**Bousserez, N., D. K. Henze, A. Perkins, K. W. Bowman, M.Lee, J.Liu, D.B.A. Jones, F. Deng, Improved analysis-error covariance matrix for high-dimensional variational inversions: application to source estimation using a 3D atmospheric transport model. Q.J.R. Meteorol. Soc.. doi: 10.1002/qj.2495<br />
<br />
* '''2014'''<br />
**Jiang, Z., D. B. A Jones, H. M. Worden, and D. K. Henze, Sensitivity of inferred regional CO source estimates to the vertical structure in CO as observed by MOPITT, Atmos. Chem. Phys. Discuss., 14, 22939-22984<br />
**Zhu, Q., Q. Zhuang, D. K. Henze, K. Bowman, M. Chen, Y. Liu, Y. He, H. Matsueda, T. Machida, and Y. Sawa, Constraining terrestrial ecosystem CO2 fluxes by integrating models of biogeochemistry and atmospheric transport and data of surface carbon fluxes and atmospheric CO2 concentrations, Atmos. Chem. Phys. Discuss., 14, 22587-22638<br />
**Mao, Y. H., Q. B. Li, D. K. Henze, Z. Jiang, D. B. A. Jones, M. Kopacz, C. He, L. Qi, M. Gao, W.-M. Hao, and K.-N. Liou, Variational estimates of black carbon emissions in the western United States, Atmos. Chem. Phys. Discuss., 14, 21865-21916<br />
**Liu, J., Bowman, K., Lee, M., Henze, D., Bousserez, N., Brix, H., Collatz, G., Menemenlis, D., Ott, L., Pawson, S., Jones, D., Nassar, R.. Carbon monitoring system flux estimation and attribution: impact of ACOS-GOSAT XCO2 sampling on the inference of terrestrial biospheric sources and sinks. Tellus B, North America, 66, may. 2014. Available at: http://www.tellusb.net/index.php/tellusb/article/view/22486<br />
** Lee, H., D. K. Henze, B. Alexander, and L. T., Murray, Investigating the sensitivity of surface-level nitrate seasonality in Antarctica to primary sources using a global model, Atmos. Environ., 89, 757--767, doi:0.1016/j.atmosenv.2014.03.003<br />
**Paulot, F., D. J. Jacob, R. W. Pinder, J. O. Bash, K. Travis, D. K. Henze, Ammonia emissions in the United States, Europe, and China derived by high-resolution inversion of ammonium wet deposition data: Interpretation with a new agricultural emissions inventory (MASAGE_NH3), J. Geophys. Res., 119, 7, 4343--4364, doi:10.1002/2013JD021130.<br />
**Lapina, K., D. K. Henze, J. B. Milford, M. Huang, M. Lin, A. M. Fiore, G. Carmichael, G. G. Pfister, and K. W. Bowman, Assessment of source contributions to seasonal vegetative exposure to ozone in the U.S., J. Geophys. Res., 119, 324-340, doi:10.1002/2013JD020905<br />
**Shen, Z., J. Liu, L. W. Horowitz, D. K. Henze, S. Fan, H. Levy II, D. L. Mauzerall, J. Lin, and S. Tao,.: Analysis of transpacific transport of black carbon during HIPPO-3: implications for black carbon aging, Atmos. Chem. Phys. Discuss., 14, 505-540, doi:10.5194/acpd-14-505-2014<br />
**Wells, K. C., D. B. Millet, K. E. Cady-Pereira, M. W. Shephard, D. K. Henze, N. Bousserez, E. C. Apel, J. de Gouw, C. Warneke, H. B. Singh, Quantifying global terrestrial methanol emissions using observations from the TES satellite sensor, Atmos. Chem. Phys., 14, 2555-2570<br />
<br />
* '''2013'''<br />
**Deng, F., D. B. A. Jones, D. K. Henze, N. Bousserez, K. W. Bowman, J. B. Fisher, R. Nassar, C. O'Dell, D. Wunch, P. O. Wennberg, E. A. Kort, S. C. Wofsy, T. Blumenstock, N. M. Deutscher, D. Griffith, F. Hase, P. Heikkinen, V. Sherlock, K. Strong, R. Sussmann, and T. Warneke, Inferring regional sources and sinks of atmospheric CO2 from GOSAT XCO2 data, Atmos. Chem. Phys. Discuss., 13, 26327-26388<br />
**Meland, B., X. Xu, D. K. Henze, J. Wang, Assessing remote polarimetric measurements sensitivities to aerosol emissions using the GEOS-Chem adjoint model, Atmos. Meas. Tech. Discuss., 6, 5447-5493, doi:10.5194/amtd-6-5447-2013<br />
**Xu, X., J. Wang, D. K. Henze, W. Qu, M. Kopacz, Constraints on Aerosol Sources Using GEOS-Chem Adjoint and MODIS Radiances, and Evaluation with Multi-sensor (OMI, MISR) data, J. Geophys. Res., 118, doi:10.1002/jgrd.50515.<br />
**Paulot, F., D. J. Jacob and D. K. Henze, Sources and processes contributing to nitrogen deposition in biodiversity hotspots worldwide, Environ. Sci. Technol, 47, 3226-3233, doi:10.1021/es3027727.<br />
**Koo, J., Q. Wang, D. K. Henze, I. A. Waitz, S.R.H. Barrett, Spatial sensitivities of human health risk to intercontinental and high-altitude pollution, Atmos. Environ., 71, 140-147.<br />
**Kharol, S., R. V. Martin, S. Philip, S. Vogel, D. K. Henze, D. Chen, Y. Wang, Q. Zhang, C. L. Heald, Persistent Sensitivity of Asian Aerosol to Emissions of Nitrogen Oxides, Geophys. Res. Lett., 40, 1021-1026, doi:10.1002/grl.50234.<br />
**Jiang, Z., D. B. A. Jones, H. M. Worden, M. N. Deeter, D. K. Henze, J. Worden, and K. W. Bowman, Quantifying the impact of model biases in convective transport on inferred CO source estimates using multi-spectral CO retrievals from MOPITT, J. Geophys. Res.,118, doi:10.1029/jgrd.50216<br />
**L. Zhu, D. K. Henze, K. E. Cady-Pereira, M. W. Shephard, M. Luo, R. W. Pinder, J. O. Bash, G. Jeong, Constraining U.S. ammonia emissions using TES remote sensing observations and the GEOS-Chem adjoint model, J. Geophys. Res., 118, doi:10.1002/jgrd.50166<br />
**Koo, J., Q. Wang, D. K. Henze, I. A. Waitz, S.R.H. Barrett, Spatial sensitivities of human health risk to intercontinental and high-altitude pollution, Atmos. Environ., 71, 140-147<br />
<br />
* '''2012'''<br />
**Bowman, K. W., and D. K. Henze, Attribution of direct ozone radiative forcing to spatially-resolved emissions, Geophys. Res. Lett., 39, L22704, doi:10.1029/2012GL053274.<br />
**Henze, D. K., D. T. Shindell, F. Akhtar, R. J. D. Spurr, R. W. Pinder, D. Loughlin, M. Kopacz, K. Singh, and C. Shim, Spatially refined aerosol direct radiative forcing efficiencies, Environ. Sci. Technol., 46, 9511 - 9518, dx.doi.org/10.1021/es301993s.<br />
**Karydis, V. A., S. L. Capps, R. H. Moore, A. Russell, D. K. Henze, and A. Nenes, Using a global aerosol model adjoint to unravel the footprint of spatially-distributed emissions on cloud droplet number and cloud albedo, Geophys. Res. Lett., 39, L24804, doi:10.1029/2012GL053346.<br />
**Parrington, M., P. I. Palmer, D. K. Henze, D. W. Tarasick, E. J. Hyer, R. C. Owen, C. Clerbaux, K. W. Bowman, M. N. Deeter, E. M. Barratt, P.-F. Coheur, D. Hurtmans, M. George, and J. R. Worden, The influence of boreal biomass burning emissions on the distribution of tropospheric ozone over North America and the North Atlantic during 2010, Atmos. Chem. Phys., 12, 2077-2098.<br />
**Paulot, F., D. K. Henze, and P. O. Wennberg, Impact of the isoprene photochemical cascade on tropical ozone, Atmos. Chem. Phys., 12, 1307-1325.<br />
**Singh, K. and A. Sandu, 2012: Variational chemical data assimilation with approximate adjoints. Computers and Geosciences, 40, 10-18.<br />
**Turner, A., D. K. Henze, R. V. Martin, and A. Hakami, The spatial extent of source influences on modeled column concentrations of short-lived species, Geophys. Res. Lett., 39, L12806, doi:10.1029/2012GL051832.<br />
**Walker, T., D. B. A. Jones, M. Parrington, D. K. Henze, L. T. Murray, J. W. Bottenheim, K. Anlauf, J. R. Worden, K. W. Bowman, C. Shim, K. Singh, M. Kopacz, D. W. Tarasick, J. Davies, P. von der Gathen, and C. C. Carouge, Impacts of midlatitude precursor emissions and local photochemistry on ozone abundances in the Arctic, J. Geophys. Res.,117, D01305 doi:10.1029/2011JD016370.<br />
**Wang, J., X. Xu, D. K. Henze, Q. Ji, S.-C. Tsay, J. Huang, Top-Down Estimate of Dust Emissions through Integration of MODIS and MISR Aerosol Retrievals with the GEOS-Chem adjoint model, Geophys. Res. Lett., 39, L08802.<br />
**Wecht, K. J., D. J. Jacob, S. C. Wofsy, E. A. Kort, J. R. Worden, S. S. Kulawik, D. K. Henze, M. Kopacz, and V. H. Payne, Validation of TES methane with HIPPO aircraft observations: implications for inverse modeling of methane sources, Atmos. Chem. Phys., 12, 1823-1832.<br />
**Singh, K. and A. Sandu (2012). "Variational chemical data assimilation with approximate adjoints." Computers and Geosciences 40: 10-18.<br />
<br />
* '''2011'''<br />
**Jiang, Z., D. B. A. Jones, M. Kopacz, J. Liu, D. K. Henze, and C. Heald, Quantifying the impact of model errors on top-down estimates of carbon monoxide emissions using satellite observations, J. Geophys. Res., 116, D15306, doi:10.1029/2010JD015282.<br />
**Jiang, Z., D. B. A. Jones, M. Kopacz, J. Liu, D. K. Henze, and C. Heald (2011), Quantifying the impact of model errors on top-down estimates of carbon monoxide emissions using satellite observations, J. Geophys. Res., 116, D15306, doi:10.1029/2010JD015282.<br />
**Kopacz, M., D. L. Mauzerall, J. Wang, E. M. Leibensperger, D. K. Henze, and K. Singh, Origin and radiative forcing of black carbon transported to the Himalayas and Tibetan Plateau, Atmos. Chem. Phys., 11, 2837-2852.<br />
<br />
* '''2010'''<br />
**Kopacz, M., D. J. Jacob, J. A. Fisher, J. A. Logan, L. Zhang, I. A Megretskaia, R. M. Yantosca, K. Singh, D. K. Henze, J. P. Burrows, M. Buchwitz, I. Khlystova, W. W. McMillan, J. C. Gille, D. P. Edwards, A. Eldering, V. Thouret, and P. Nedelec (2010), Global estimates of CO sources with high resolution by adjoint inversion of multiple satellite datasets (MOPITT, AIRS, SCIAMACHY, TES), Atoms. Chem. Phys., 10, 855-876.<br />
**Kopacz, M., D.J. Jacob, J.A. Fisher, J. A. Logan, L. Zhang, I. A. Megretskaia, R. M. Yantosca, K. Singh, D. K. Henze, J. P. Burrows, M. Buchwitz, I. Khlystova, W. W. McMillan, J. C. Gille, D. P. Edwards, A. Eldering, V. Thouret, and P. Nedelec (2010): Global estimates of CO sources with high resolution by adjoint inversion of multiple satellite datasets (MOPITT, AIRS, SCIAMACHY, TES), Atmos. Chem. Phys., 10, 855-876. http://www.atmos-chem-phys.net/10/855/2010/acp-10-855-2010.<br />
**Parrington, M., P. I. Palmer, D. K. Henze, D. W. Tarasick, E. J. Hyer, R. C. Owen, C. Clerbaux, K. W. Bowman, M. N. Deeter, E. M. Barratt, P.-F. Coheur, D. Hurtmans, M. George, and J. R. Worden (2012), The influence of boreal biomass burning emissions on the distribution of tropospheric ozone over North America and the North Atlantic during 2010, Atmos. Chem. Phys., 12, 2077-2098<br />
**Singh, K., Jardak, M., Sandu, A., Bowman, K., Lee, M., and Jones, D. (2010): Construction of non-diagonal background error covariance matrices for global chemical data assimilation, Geosci. Model Dev. Discuss., 3, 1783-1827, doi:10.5194/gmdd-3-1783-2010. http://www.geosci-model-dev-discuss.net/3/1783/2010/gmdd-3-1783-2010.html<br />
<br />
* '''2009'''<br />
**Eller, P., K. Singh, A. Sandu, K. Bowman, D. K. Henze, and M. Lee (2009), Implementation and evaluation of an array of chemical solvers in a global chemical transport model, Geosci. Mod. Devel., 2, 185-207.<br />
**Henze, D. K., J. H. Seinfeld and D. T. Shindell, (2009), Inverse modeling and mapping U.S. air quality influences of inorganic PM2.5 precursor emissions with the adjoint of GEOS-Chem, Atoms. Chem. Phys., 9, 5877-5903.<br />
**Kopacz, M., D. J. Jacob, D. K. Henze, C. L. Heald, D. G. Streets, and Q. Zhang (2009), A comparison of analytical and adjoint Bayesian inversion methods for constraining Asian sources of CO using satellite (MOPITT) measurements of CO columns, J. Geophys. Res., 114, D04305, doi:10.1029/2007JD009264.<br />
**Pye, H. O. T., H. Liao, S. Wu, L. J. Mickely, D. J. Jacob, D. K. Henze, and J. H. Seinfeld (2009), Effect of changes in climate and emissions on future sulfate-nitrate-ammonium aerosol levels in the United States, J. Geophys. Res., 114, D01205, doi:10.1029/2008JD010701.<br />
**Zhang, L., D. J. Jacob, M. Kopacz, D. K. Henze, K. Singh, and D. A. Jaffe (2009), Intercontinental source attribution of ozone pollution at western U.S. sites using an adjoint method, Geophys. Res. Lett., 36, L11810, doi:10.1029/2009GL037950.<br />
<br />
* '''2007'''<br />
**Henze, D. K., A. Hakami and J. H. Seinfeld (2007), Development of the adjoint of GEOS-Chem, Atmos. Chem. Phys., 7, 2413-2433.<br />
<br />
=== Conference proceedings === <br />
* Adjoint inversion of CO sources using combined MOPITT, SCIAMACHY and AIRS CO columns, presented by Monika Kopacz at the COSPAR Scientific Assembly, Montreal, July 18, 2008. http://acmg.seas.harvard.edu/presentations/powerpoints/mak2008/COSPAR_MKopacz_July2008.ppt<br />
<br />
* Singh, K., P. Eller, A. Sandu, D. K. Henze, K. Bowman, M. Kopacz, and M. Lee (2009), Towards the construction of a standard geos-chem adjoint model, ACM High Performance Computing Conference.<br />
<br />
* Kopacz, M., Mauzerall, D.L., Leibensperger, E.M., Wang, J., Henze, D.K., Singh, K., Shim, C. Identifying the origin and estimating the radiative forcing of BC in the Himalayas: an analysis using the global GEOS-Chem adjoint model, European Geophysical Union meeting, Vienna, May 4, 2010.<br />
<br />
* Kopacz, M., Jacob, D.J., Fisher, J.A., Logan, J.A., Zhang, L., Megretskaia, I.A., Yantosca, R.M., Singh, K., Henze, D.K., Burrows, J.P., Buchwitz, M., Khlystova, I., McMillan, W.W., Gille, J.C., Edwards, D.P., Eldering, A., Thouret, V., Nedelec, P. Global estimates of CO sources with high resolution by adjoint inversion of multiple satellite datasets (MOPITT, AIRS, SCIAMACHY, TES), European Geophysical Union meeting, Vienna, May 7, 2010.<br />
<br />
* Tang, J., Zhuang, Q. and Xiong, X. (2010), 4D-Var inversion of atmospheric methane fluxes by assimilating SCIAMACHY and AIRS satellite retrievals, AGU, Dec. 18, 2010, http:/web.ics.purdue.edu/~tang16/agu2010_tang.ppt<br />
<br />
* Bousserez, N., R. V. Martin, K. W. Bowman, D.K. Henze, M. Kopacz, K. Singh, C. Shim, C. Wespes, Improving the lightning NOx source using satellite observations: a 4D-var analysis approach, AGU, Dec., 2010, http://myweb.dal.ca/nc689777/AGU_liNOx_poster_final.pdf</div>Kbowmanhttps://wiki.seas.harvard.edu/geos-chem/index.php?title=GEOS-Chem_Adjoint&diff=4680GEOS-Chem Adjoint2010-06-29T04:54:28Z<p>Kbowman: /* Current GEOS-Chem Adjoint Research Projects (please add yours!) */</p>
<hr />
<div><big>'''Adjoint and Data Assimilation Working Group'''</big><br />
<br />
<br />
== Historical Development ==<br />
Original work on the adjoint of GEOS-Chem v6 began in 2003, focusing on the adjoint of the offline aerosol simulation. By 2005, the adjoint was expanded to include a tagged CO simulation and a full chemistry simulation; an adjoint of GEOS-Chem v7 was also developed in the following years. Each of these branches of the adjoint code were been constructed in a hybrid fashion using a combination of automatic differentiation software ([http://www.autodiff.com/tamc TAMC], [http://people.cs.vt.edu/~asandu/Software/Kpp/ KPP]) and manual coding of both discrete and continuous adjoints. They shared many common elements yet had unique features for different applications. <br />
<br />
During the summer of 2009, the existing branches were merged and updated to bring the adjoint into alignment with the latest release of GEOS-Chem, v8-02-01. This merged adjoint model is now the standard adjoint code into which all further development efforts will be placed. <br />
<br />
== Current Forward Model Code ==<br />
<br />
The forward model on which the adjoint is based corresponds to GEOS-Chem v8-02-01 with the following updates:<br />
<br />
* KPP solver for gas-phase chemistry (as in GCv8-02-03)<br />
* Implement Bond 2007 BC/OC emissions (as in GCv8-02-02)<br />
* Apply bug fixes from GCv8-02-02 listed [http://wiki.seas.harvard.edu/geos-chem/index.php/GEOS-Chem_v8-02-02#Previous_issues_now_resolved_in_v8-02-02 here]<br />
* Apply bug fixes from GCv8-02-03 listed [http://wiki.seas.harvard.edu/geos-chem/index.php/GEOS-Chem_v8-02-03#Previous_issues_now_resolved_in_v8-02-03 here]<br />
* Apply bug fixes from GCv8-02-04 listed [http://wiki.seas.harvard.edu/geos-chem/index.php/GEOS-Chem_v8-02-04#Previous_issues_now_resolved_in_v8-02-04 here]<br />
<br />
== Current Adjoint Code ==<br />
<br />
=== Features === <br />
* Meteorological fields<br />
** GEOS-3 <i>needs testing</i><br />
** GEOS-4<br />
** GEOS-5 <br />
* model resolution<br />
** 4 x 5<br />
** 2 x 2.5 <br />
* Forward model processes<br />
** convection<br />
** advection<br />
** PBL mixing<br />
** dry deposition<br />
** wet deposition <i> needs GEOS-4 testing </i><br />
** strat / trop exchange with LINOZ <i> implemented, but will be updated once v8-02-04 is released </i><br />
** NOy up fluxes <br />
** aerosols <br />
*** inorganic aerosol thermodynamics <br />
*** sulfate chemistry <br />
*** BC<br />
*** SOA, Dust, sea salt <i> needs doing </i><br />
*** aerosol surface area feedbacks <i> needs updating </i><br />
*** aerosol optical feedbacks <i> needs doing </i><br />
** emissions<br />
*** all standard emissions included<br />
* Simulation modes<br />
** full chemistry<br />
** tagged CO<br />
** tagged Ox <br />
** CO2<i> in progress </i><br />
** methane <i> in progress </i><br />
* Observational Operators<br />
** MOPITT CO column<br />
** SCIAMACHY CO column<br />
** AIRS CO column<br />
** IMPROVE PM2.5 (NO3, SO4, OC, BC) <i> needs updating </i><br />
** CASTNet (NH4+) <i> needs updating </i> <br />
** GOME / SCIAMACHY NO2 column <i> needs updating </i> <br />
*** using KNMI retrieval (Henze)<br />
*** using Dalhousie retrieval (Shim)<br />
** TES NH3 <br />
** TES O3 <br />
* Control parameters<br />
** Initial Conditions scaling factors (linear or log)<br />
** Emissions scaling factors (linear or log) <br />
*** NH3, primary BC/OC, SO2: anthropogenic, natural, bioburn, biomass, ship<br />
*** NOx: soil, lightning, aircraft, anthropogenic, biofuel, bioburn<br />
*** all other gas-phase tracers: anthropogenic, biofuel, bioburn <br />
* Adjoint sensitivities<br />
** w.r.t. all implemented control parameters<br />
** w.r.t Reaction Rate Parameters <br />
** w.r.t all emissions <br />
** of AQ attainment metrics <i> needs updating </i><br />
** of spatiotemporally averaged species concentrations (e.g., arctic O3) <i> needs updating </i><br />
* Other<br />
** Inverse Hessian approximation <i> needs updating </i><br />
** off-diagonal covariance matrices <i> needs updating </i><br />
** 3D-Var <i> needs updating </i><br />
<br />
Features may be qualified as: <br />
* <i>needs testing</i>: an implemented feature that we haven't fully used yet<br />
* <i>needs updating</i>: a feature developed with a previous branch that has yet to be updated to GEOS-Chem v8 and the merged adjoint<br />
* <i>needs doing</i>: a feature nobody has tackled the adjoint of yet<br />
<br />
=== Primary code developers ===<br />
Monika Kopacz, Kumaresh Singh, Changsub Shim, Daven Henze<br />
<br />
=== Adjoint model lead scientist ===<br />
Daven Henze <br />
<br />
== Documentation ==<br />
<br />
=== User's guide ===<br />
A user's guide is available. http://adjoint.colorado.edu/%7Edaven/gcadj_std/GC_adj_man.pdf <br />
<br />
=== Code flowchart ===<br />
Meemong Lee has created a detailed flowchart of the inverse model code structure. http://adjoint.colorado.edu/~daven/gcadj_std/flowchart.pdf<br />
<br />
== Distribution and Use ==<br />
Code for the adjoint is distributed through a CVS server located at adjoint.colorado.edu. Contact Daven Henze to obtain an account on the server.<br />
<br />
Even if your office mate has a copy of the code, the best way to obtain the model is to get a CVS account for yourself and download a version from the repository. So please do not copy code directly from others or pass the code along to third parties. This vastly helps with tracking developments and keeping up with model updates. <br />
<br />
Use of the adjoint model code follows standard practice for GEOS-Chem. It is expected that any developments that come of individual applications based on this community model will eventually be given back to the community by incorporation of new developments into the standard adjoint code. New development should be submitted to Daven Henze for inclusion in the standard adjoint model code. <br />
<br />
== Giving credit for using the adjoint model ==<br />
<br />
We aim to make distribution of adjoint model code as immediate as possible. A consequence is that many features may not yet be publicly documented. Therefore, giving code developers due credit is of utmost importance. At this point, any use of the GEOS-Chem model adjoint should include as co-authors the primary developers: Daven Henze, Monika Kopacz, Kumaresh Singh and Changsub Shim. In trade, we provide user support. As the model matures and user support become less of an issue, these requirements will be relaxed. <br />
<br />
Authors of new additions to the standard code will be given due credit on the first round of publications to come of their development. Hence, additional co-authors may also be required if the application uses features that are newly developed by additional developers. <br />
<br />
Lastly, it is requested that users of the GEOS-Chem adjoint consider offering co-author ship to several additional scientists who have contributed to the adjoint code support and progress, such as Kevin Bowman, Adrian Sandu and Daniel Jacob. <br />
<br />
Overall, if you have any questions about authorship, even for a conference presentation, please contact Daven Henze. <br />
<br />
<br />
== Current GEOS-Chem Adjoint Research Projects (please add yours!) ==<br />
{| border=1 cellspacing=0 cellpadding=5<br />
|- bgcolor="#cccccc"<br />
!User Group <br />
!Description <br />
!Contact Person<br />
|-<br />
|CU Boulder<br />
|Aerosol precursors, CO2, O3; general adjoint code maintenance<br />
|[mailto:daven.henze@colorado.edu Daven Henze]<br />
|-<br />
|Harvard<br />
|Methane<br />
|[mailto:wecht@fas.harvard.edu Kevin Wecht]<br />
|-<br />
|Purdue University<br />
|Methane (SICAMACHY, AIRS and IASI)<br />
|[mailto:tang16@purdue.edu Jinyun Tang]<br />
|-<br />
|MIT<br />
|Aircraft emissions<br />
|[mailto:jaminkoo@mit.edu Jamin Koo]<br />
|-<br />
|Princeton<br />
|BC sensitivities, general adjoint code development<br />
|Monika Kopacz, mkopacz [at] princeton.edu<br />
|-<br />
|Dalhousie University<br />
|Lightning NOx emissions and impact on tropical ozone using the adjoint<br />
|[mailto:N.Bousserez@dal.ca Nicolas Bousserez]<br />
|-<br />
|JPL<br />
|Microwave Limb Sounder (MLS) Ozone assimilation<br />
|[mailto:meemong.lee@jpl.nasa.gov Meemong Lee]<br />
|-<br />
|JPL <br />
| TES ozone assimilation/attribution of ozone radiative forcing<br />
|[mailto:kevin.bowman@jpl.nasa.gov Kevin Bowman]<br />
|-<br />
|University of Edinburgh<br />
|Quantifying the impact of boreal forest fires on tropospheric oxidants over the Atlantic<br />
|[mailto:mark.parrington@ed.ac.uk Mark Parrington]<br />
|-<br />
|}<br />
<br />
== Get Involved ==<br />
Support and development of the GEOS-Chem adjoint has clearly become a broad undertaking. In attempt to focus such developments, we've created a GC-adjoint mailing list. If you wish to become involved, you should add yourself to this list by sending an email to [mailto:geos-chem-adjoint-requests@seas.harvard.edu geos-chem-adjoint-requests@seas.harvard.edu] with the word subscribe in the subject or body, or you may click here for browser sign-up: https://lists.seas.harvard.edu/mailman/listinfo/geos-chem-adjoint). <br />
<br />
Kevin Bowman organizes bimonthly conference calls concerning current adjoint model activities.<br />
<br />
<br />
== Publications ==<br />
<br />
=== Journal Articles ===<br />
<br />
* Kopacz, M., D.J. Jacob, J.A. Fisher, J. A. Logan, L. Zhang, I. A. Megretskaia, R. M. Yantosca, K. Singh, D. K. Henze, J. P. Burrows, M. Buchwitz, I. Khlystova, W. W. McMillan, J. C. Gille, D. P. Edwards, A. Eldering, V. Thouret, and P. Nedelec (2010): Global estimates of CO sources with high resolution by adjoint inversion of multiple satellite datasets (MOPITT, AIRS, SCIAMACHY, TES), Atmos. Chem. Phys., 10, 855-876. http://www.atmos-chem-phys.net/10/855/2010/acp-10-855-2010.pdf<br />
<br />
* Kopacz, M., D. J. Jacob, D. K. Henze, C. L. Heald, D. G. Streets, and Q. Zhang (2009), A comparison of analytical and adjoint Bayesian inversion methods for constraining Asian sources of CO using satellite (MOPITT) measurements of CO columns, J. Geophys. Res., doi:0.1029/2007JD009264. http://acmg.seas.harvard.edu/publications/KopaczJGR2009_2007JD009264.pdf<br />
<br />
* Henze, D. K., J. H. Seinfeld and D. T. Shindell (2009), Inverse modeling and mapping U.S. air quality influences of inorganic PM2.5 precursor emissions with the adjoint of GEOS-Chem, Atmos. Chem. Phys., 9, 5877-5903.<br />
<br />
* Zhang, L., D. J. Jacob, M. Kopacz, D. K. Henze, K. Singh, and D. A. Jaffe (2009), Intercontinental source attribution of ozone pollution at western U.S. sites using an adjoint method, Geophys. Res. Lett., 36, L11810, doi:10.1029/2009GL037950<br />
<br />
* Henze, D. K., A. Hakami and J. H. Seinfeld (2007), Development of the adjoint of GEOS-Chem, Atmos. Chem. Phys., 7, 2413-2433.<br />
<br />
<br />
=== Conference proceedings === <br />
* Adjoint inversion of CO sources using combined MOPITT, SCIAMACHY and AIRS CO columns, presented by Monika Kopacz at the COSPAR Scientific Assembly, Montreal, July 18, 2008. http://acmg.seas.harvard.edu/presentations/powerpoints/mak2008/COSPAR_MKopacz_July2008.ppt<br />
<br />
* Singh, K., P. Eller, A. Sandu, D. K. Henze, K. Bowman, M. Kopacz, and M. Lee (2009), Towards the construction of a standard geos-chem adjoint model, ACM High Performance Computing Conference.<br />
<br />
* Kopacz, M., Mauzerall, D.L., Leibensperger, E.M., Wang, J., Henze, D.K., Singh, K., Shim, C. Identifying the origin and estimating the radiative forcing of BC in the Himalayas: an analysis using the global GEOS-Chem adjoint model, European Geophysical Union meeting, Vienna, May 4, 2010.<br />
<br />
* Kopacz, M., Jacob, D.J., Fisher, J.A., Logan, J.A., Zhang, L., Megretskaia, I.A., Yantosca, R.M., Singh, K., Henze, D.K., Burrows, J.P., Buchwitz, M., Khlystova, I., McMillan, W.W., Gille, J.C., Edwards, D.P., Eldering, A., Thouret, V., Nedelec, P. Global estimates of CO sources with high resolution by adjoint inversion of multiple satellite datasets (MOPITT, AIRS, SCIAMACHY, TES), European Geophysical Union meeting, Vienna, May 7, 2010.</div>Kbowman