Difference between revisions of "Aerosols Working Group"

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{| border=1 cellspacing=0 cellpadding=5
 
{| border=1 cellspacing=0 cellpadding=5
|-
+
|-valign="top"
|'''Aerosols Working Group Co-Chairs'''
+
!width="300px" bgcolor="#CCCCCC"|Aerosols Working Group Co-Chairs
|[http://web.mit.edu/heald/www/ Colette Heald], [http://pierce.atmos.colostate.edu/ Jeff Pierce]
+
|width="600px"|
|-
+
*[http://www.atmos.washington.edu/blog/beckya/becky-alexander/ Becky Alexander] (GitHub: [https://github.com/beckyalexander @beckyalexander])
|'''Aerosols Working Group email list'''
+
*[http://web.mit.edu/heald/www/ Colette Heald]
|<tt>geos-chem-aerosols@seas.harvard.edu</tt>
+
*[http://pierce.atmos.colostate.edu/people.htm#jeff Jeff Pierce] (GitHub: [https://github.com/theloniuspunk @theloniuspunk])
|-
+
*[http://www.albany.edu/~yfq/ Fangqun Yu]
|'''To subscribe to email list'''
+
 
|Send email to [mailto:geos-chem-aerosols-join@seas.harvard.edu <tt>geos-chem-aerosols-join@seas.harvard.edu</tt>]
+
|-valign="top"
|-
+
!bgcolor="#CCCCCC"|Aerosols Working Group email list
|'''To unsubscribe from email list'''
+
|<tt>geos-chem-aerosols [at] g.harvard.edu</tt>
|Send email to [mailto:geos-chem-aerosols-leave@seas.harvard.edu <tt>geos-chem-aerosols-leave@seas.harvard.edu</tt>]
+
 
 +
|-valign="top"
 +
!bgcolor="#CCCCCC"|To subscribe to email list
 +
|Either
 +
*Send an email to <tt>geos-chem-aerosols+subscribe [at] g.harvard.edu</tt>
 +
Or
 +
*Go to the [https://groups.google.com/a/g.harvard.edu/forum/#!forum/geos-chem-aerosols GEOS-Chem Aerosols Google Group]
 +
*Click on '''Subscribe to this group'''
 +
 
 +
|-valign="top"
 +
!bgcolor="#CCCCCC"|To unsubscribe from email list
 +
|Either
 +
*Send an email to <tt>geos-chem-aerosols+unsubscribe [at] g.harvard.edu</tt>
 +
Or
 +
*Go to the [https://groups.google.com/a/g.harvard.edu/forum/#!forum/geos-chem-aerosols GEOS-Chem Aerosols Google Group]
 +
*Click on the '''My Settings''' button
 +
*Click on '''Leave this group'''
 +
 
 
|}
 
|}
 +
 +
--[[User:Bmy|Bob Y.]] ([[User talk:Bmy|talk]]) 16:34, 21 August 2015 (UTC)
  
 
== Current GEOS-Chem Aerosol Projects, alphabetized by institution (please add yours!) ==
 
== Current GEOS-Chem Aerosol Projects, alphabetized by institution (please add yours!) ==
 
{| border=1 cellspacing=0 cellpadding=5
 
{| border=1 cellspacing=0 cellpadding=5
 
|- bgcolor="#cccccc"
 
|- bgcolor="#cccccc"
!User Group
+
!width="150px"|User Group
!Description
+
!width="600px"|Description
!Contact Person
+
!width="150px"|Contact Person
!Date Added
+
!width="100px"|Date Added
 
|-
 
|-
|Beijing/SUNY
+
|Beijing/SUNY-Albany/L'Aquila
 
|Representing GEOS-Chem in the AEROCOM intercomparisons
 
|Representing GEOS-Chem in the AEROCOM intercomparisons
|[mailto:mayfu@pku.edu.cn May Fu] <br>[mailto:yfq@asrc.cestm.albany.edu Fangqun Yu]
+
|[mailto:mayfu@pku.edu.cn May Fu] <br>[mailto:fyu@albany.edu Fangqun Yu]<br>[mailto:gabriele.curci@aquila.infn.it Gabriele Curci]
 
|28 Jul 2010
 
|28 Jul 2010
 
|-
 
|-
|CU Boulder
+
|Columbia University
|Inverse modeling of inorganic PM2.5 precursors.  Direct aerosol radiative forcing.
+
|Multiphase SOA formation in GEOS-Chem
|[mailto:daven.henze@colorado.edu Daven Henze]
+
|[mailto:vfm2103@columbia.edu Faye McNeill]  
|19 Apr 2009
+
|23 Apr 2015
|-
+
|CMU
+
|Development of aerosol microphysics. Represented aerosols include size-resolved aerosol numbers and multi-component mass species, including sulfate, sea-salt, OM, EC, and dust. Evaluation against field campaign, e.g. ACE-Asia.
+
|[mailto:petera@andrew.cmu.edu Peter Adams]<br>[mailto:dwesterv@andrew.cmu.edu Dan Westervelt]
+
|23 Apr 2009
+
 
|-
 
|-
 
|Dalhousie
 
|Dalhousie
|Optimal estimation satellite retrieval of aerosols
+
|Decadal trends in PM2.5
|[mailto:Aaron.van.Donkelaar@dal.ca Aaron van Donkelaar]
+
|[mailto:ch296755@dal.ca Chi Li]
|26 Sep 2012
+
|13 Apr 2017
 
|-
 
|-
 
|Dalhousie
 
|Dalhousie
|Global aerosol speciation
+
|Arctic aerosol number distributions
|[mailto:philip.sajeev@gmail.com Sajeev Philip]
+
|26 Sep 2012
+
|-
+
|Dalhousie
+
|Sensitivity of Asian aerosols to emissions
+
|[mailto:Shailesh.Kharol@DAL.CA Shailesh Kharol]
+
|26 Sep 2012
+
|-
+
|Dalhousie/Tsinghua
+
|Historical trends in Asian PM2.5 and emissions
+
|[mailto:ggn220@gmail.com Guannan Geng]
+
|26 Sep 2012
+
|-
+
|Dalhousie
+
|Simulation of the absorbing aerosol index
+
|[mailto:fr526565@dal.ca Farhan Khan]
+
|26 Sep 2012
+
|-
+
|Dalhousie
+
|Diurnal variation in North American aerosol
+
|[mailto:Andrew.Morrow@Dal.Ca Andrew Morrow]
+
|26 Sep 2012
+
|-
+
|Dalhousie
+
|Sensitivity of global PM2.5 to sources
+
|[mailto:colin.lee@dal.ca Colin Lee]
+
|26 Sep 2012
+
|-
+
|Dalhousie
+
|Aerosol microphysics simulation of AOD and PM2.5
+
 
|[mailto:croft@mathstat.dal.ca Betty Croft]
 
|[mailto:croft@mathstat.dal.ca Betty Croft]
|26 Sep 2012
+
|13 Apr 2017
 
|-
 
|-
 
|Dalhousie
 
|Dalhousie
|Aerosol scavenging, nuclear accident simulation (137-CS, 133-XE)
+
|Arctic black carbon
|[mailto:croft@mathstat.dal.ca Betty Croft]
+
|[mailto:jn231250@dal.ca Junwei Xu]
|03 Jan 2013
+
|13 Apr 2017
 
|-
 
|-
 
|Dalhousie
 
|Dalhousie
|Satellite-based estimates of Asian PM2.5
+
|Metals in PM2.5  
 
|[mailto:jn231250@dal.ca Junwei Xu]
 
|[mailto:jn231250@dal.ca Junwei Xu]
|26 Sep 2012
+
|13 Apr 2017
 
|-
 
|-
 
|Dalhousie
 
|Dalhousie
|Aerosol microphysics: effects of nucleation, emissions and SOA on aerosol size distribution
+
|Interpreting SPARTAN to understand PM2.5 chemical composition
|[mailto:jeffrey.robert.pierce@gmail.com Jeff Pierce]
+
|[mailto:cr330325@dal.ca Crystal Weagle]
|03 Jan 2011
+
|13 April 2017
 
|-
 
|-
 
|Dalhousie
 
|Dalhousie
|Historical trends in global satellite-derived estimates of PM2.5
+
|Aerosol mass scattering efficiency
|[mailto:briboys@gmail.com Brian Boys]
+
|[mailto:Robyn.Latimer@Dal.Ca Robyn Latimer]
|27 Apr 2011
+
|13 April 2017
|-
+
|Dalhousie
+
|Historical trends in aerosol speciation in North America 
+
|[mailto:s.torbatian@gmail.com Sara Torbatian]
+
|27 Apr 2011
+
 
|-
 
|-
 
|Harvard
 
|Harvard
|Aerosol scavenging in continental outflow; intercontinental transport and dissipation of pollution plumes
+
|Particulate sulfur via sulfur-formaldehyde (hydroxymethane sulfonate) chemistry in clouds
|[mailto:kim68@fas.harvard.edu Sungshik Kim]
+
|[mailto:jmoch@g.harvard.edu Jonathan Moch]
|13 Jul 2010
+
|14 Dec 2018
 
|-
 
|-
|MIT
+
|MIT/Harvard
|PM2.5 concentrations and health impacts, including future emissions trends
+
|Implementing MOSAIC aerosols into GEOS-Chem
|[mailto:selin@mit.edu Noelle Selin]
+
|[mailto:seastham@mit.edu Sebastian Eastham]
|29 Jun 2010
+
|11 May 2015
 
|-
 
|-
 
|MIT
 
|MIT
|Examining long term trends of dust in the tropics
+
|Developing a simulation of bioaerosol
|[mailto:daridley@mit.edu Dave Ridley]
+
|[mailto:janssen@mit.edu Ruud Janssen]
|10 April 2012
+
|12 Apr 2017
 
|-
 
|-
 
|MIT
 
|MIT
|Investigating sub-grid variability and scale invariance of dust emissions
+
|Investigating spread in carbonaceous aerosol impacts from fires due to emissions uncertainty
|[mailto:daridley@mit.edu Dave Ridley]
+
|[mailto:tscarter@mit.edu Tess Carter]
|25 September 2012
+
|29 Apr 2019
 
|-
 
|-
 
|MIT
 
|MIT
|Integrating RRTMG in GEOS-Chem (LW and SW, gases and aerosols), evaluating aerosol forcing
+
|Testing OA simulation schemes against suite of airborne observations
|[mailto:daridley@mit.edu Dave Ridley] [mailto:heald@mit.edu Colette Heald]
+
|[mailto:sidhantp@mit.edu Sid Pai]
|25 September 2012
+
|29 Apr 2019
 
|-
 
|-
 
|MIT
 
|MIT
|Investigating impact of black carbon aging and mixing on radiative forcing
+
|Exploring aerosol simulation against remote observations from ATom
|[mailto:xuanw12@mit.edu Xuan Wang]
+
|[mailto:chloegao@mit.edu Chloe Gao]
|25 September 2012
+
|29 Apr 2019
 
|-
 
|-
|MIT
+
|SUNY-Albany
|Investigating NHx system (GEOS-Chem compared to surface, CalNex and IASI observations)
+
|Effects of size-resolved aerosol microphysics on aerosol radiative forcing and chemistry
|[mailto:schiferl@mit.edu Luke Schiferl]
+
|[mailto:fyu@albany.edu Fangqun Yu]<br>[mailto:gluo@albany.edu Gan Luo]
|20 May 2010
+
|5 May 2015
 
|-
 
|-
|MIT
+
|SUNY-Albany
|Developing a scheme to describe the aging of organic aerosol
+
|Combining Measurements and Model Simulations of Particle Size Distributions to Improve Our Understanding of Particle Formation and Growth
|[mailto:qichen@mit.edu Qi Chen]
+
|[mailto:fyu@albany.edu Fangqun Yu]<br>[mailto:gluo@albany.edu Gan Luo]
|8 Apr 2013
+
|4 May 2017
 
|-
 
|-
|MIT
+
|SUNY-Albany
|Impact of 2000-2050 changes in climate, vegetation and land use on aerosols
+
|Long-Term Trend of Particle Number Concentrations: Controlling Processes and Implications
|[mailto:pkamostai@gmail.com Amos Tai]
+
|[mailto:fyu@albany.edu Fangqun Yu]<br>[mailto:gluo@albany.edu Gan Luo]
|9 May 2013
+
|4 May 2017
 
|-
 
|-
|MIT/CU
+
|UW
|Investigating transpacific transport of aerosol and gas-phase pollution.
+
|Sources of sea salt aerosol in polar regions: Blowing snow and Frost flowers
|[mailto:klapina@atmos.colostate.edu Kateryna Lapina]
+
|[mailto:jiayue@uw.edu Jiayue Huang] <br>[mailto:jaegle@uw.edu Lyatt Jaeglé]
|13 Apr 2009
+
|22 Apr 2015
 
|-
 
|-
|MIT/CSU
+
|UW
|Investigating aerosols in the Southeastern US
+
|Sea salt aerosols and their effects on global tropospheric chemistry
|[mailto:bonne@atmos.colostate.edu Bonne Ford]
+
|[mailto:jaegle@uw.edu Lyatt Jaeglé]<br> [mailto:jiayue@uw.edu Jiayue Huang]
|01 Feb 2012
+
|22 Apr 2015
 
|-
 
|-
|NASA LaRC
 
|transpacific transport of dust and sulfate; composition of Asian upper tropopause aerosol layer (ATAL).
 
|[mailto:t.d.fairlie@nasa.gov Duncan Fairlie]
 
|10 Apr 2013
 
 
|-
 
|-
|NIA / LaRC
+
|UW
|Radiative effects of aerosols vs. clouds
+
|Sulfate formation via oxidation of SO2 by hypohalous acids (e.g., HOBr)
|[mailto:hyl@nianet.org Hongyu Liu]
+
|[mailto:beckya@uw.edu Becky Alexander]<br> [mailto:chenqjie@uw.edu Qianjie Chen]
|05 Feb 2010
+
|22 April 2015
 
|-
 
|-
|Peking University
+
|University of Wollongong
|Carbonaceous aerosols in China
+
|Characterizing interannual variability of Australian dust export and deposition
|[mailto:tmfu@pku.edu.cn May Fu]
+
|[mailto:jwg366@uowmail.edu.au Jesse Greenslade]<br> [mailto:jennyf@uow.edu.au Jenny Fisher]
|01 Jul 2010
+
|23 April 2015
 
|-
 
|-
|Peking University
+
|L'Aquila
|Biomass burning aerosols in South and East Asia
+
|Analysis of aerosol optical properties using FlexAOD
|[mailto:tmfu@pku.edu.cn May Fu]
+
|[mailto:gabriele.curci@aquila.infn.it Gabriele Curci]
|01 Jul 2010
+
|16 Apr 2017
|-
+
|Peking University
+
|Estimate of interdecadal variation in direct radiative effect of aerosols over global lands
+
|[mailto:linjt@pku.edu.cn Jintai Lin]
+
|01 Nov 2010
+
|-
+
|Peking University
+
|Anthropogenic dust and impacts on global environment
+
|[mailto:linjt@pku.edu.cn Jintai Lin]
+
|01 May 2011
+
|-
+
|University of Athens-National Observatory of Athens (Greece)
+
|Study of aerosols over Europe and Greece by coupling Geos-chem (v8-03-01) with Camx
+
|[mailto:aprot@phys.uoa.gr Anna Protonotariou]
+
|01 Jul 2010
+
|-
+
|UNL
+
|aerosol retrieval from satellite, aerosol direct and indirect effect.
+
|[mailto:jwang7@unl.edu Jun Wang]
+
|22 Apr 2009
+
 
|-
 
|-
|University of L'Aquila
+
|L'Aquila
|Participation in organic aerosol AEROCOM intercomparison (v8.02.02 of GEOS-Chem)
+
|AeroCom phase-3 intercomparisons: Biomass Burning, INSITU, Remote Sensing
 
|[mailto:gabriele.curci@aquila.infn.it Gabriele Curci]
 
|[mailto:gabriele.curci@aquila.infn.it Gabriele Curci]
|24 Jun 2009
+
|16 Apr 2017
 
|-
 
|-
|University of L'Aquila
+
|L'Aquila
|Development of a post-processing tool for aerosol optical properties computations
+
|Direct and first indirect effect of anthropogenic dust
 
|[mailto:gabriele.curci@aquila.infn.it Gabriele Curci]
 
|[mailto:gabriele.curci@aquila.infn.it Gabriele Curci]
|20 Jan 2011
+
|16 Apr 2017
 
|-
 
|-
|UW
+
|NIA / NASA LaRC
|Investigating the chemistry of sulfate and nitrate aerosol formation utilizing observations and modeling of oxygen isotopes
+
|Radiative effects of aerosols versus clouds on key tropospheric oxidants
|[mailto:beckya@uw.edu Becky Alexander]
+
|[mailto:Hongyu.Liu-1@nasa.gov Hongyu Liu]
|30 Jun 2010
+
|5 May 2015
 
|-
 
|-
|UW
+
|NIA / NASA LaRC
|Developing a new parameterization of sea-salt emissions and dry deposition
+
|Sources and variability of tropospheric aerosols over the North Atlantic
|[mailto:jaegle@uw.edu Lyatt Jaegl&eacute;]
+
|[mailto:Hongyu.Liu-1@nasa.gov Hongyu Liu]
|01 Jul 2010
+
|5 May 2015
 
|-
 
|-
|UW
+
|UCLA
|Transport of aerosols to the Arctic using CALIOP observations
+
|Improve black carbon simulations in GEOS-Chem; BC aging microphysics; BC-snow interaction; BC radiative properties;
|[mailto:dipierro@uw.edu Maurizio DiPierro]
+
|[mailto:cenlinhe@atmos.ucla.edu Cenlin He]
|01 Jul 2010
+
|8 May 2015
 
|-
 
|-
|UW
+
|UCLA
|Long-range transport of aerosols from Asia and N. America
+
|Black carbon emissions, simulations and its radiative effects over the Arctic
|[mailto:yrluan@uw.edu Yurong Luan]
+
|[mailto:qiling@atmos.ucla.edu Ling Qi]
|01 Jul 2010
+
|8 May 2015
 
|-
 
|-
|SNU
+
|UCLA
|Evaluation of regional aerosol simulations with the nested G-C over East Asia
+
|Improve aerosol wet scavenging and dry deposition in GEOS-Chem
|[mailto:rjpark@snu.ac.kr Rokjin Park]
+
|[mailto:qiling@atmos.ucla.edu Ling Qi]<br>[mailto:cenlinhe@atmos.ucla.edu Cenlin He]
|15 Sep 2009
+
|8 May 2015
|-
+
|SNU
+
|Implement the VBS method in GEOS-Chem for SOA
+
|[mailto:rjpark@snu.ac.kr Rokjin Park] [mailto:cdswk@snu.ac.kr Dusung Jo]
+
|28 Sep 2012
+
|-
+
|SNU
+
|Siberian forest fire aerosols and climatic effects
+
|[mailto:rjpark@snu.ac.kr Rokjin Park] [mailto:hb3099@hotmail.com Seungeun Lee]
+
|28 Sep 2012
+
|-
+
|SUNY-Albany
+
|Formation and evolution of particles in the troposphere
+
|[mailto:yfq@asrc.cestm.albany.edu Fangqun Yu]
+
|06 Mar 2010
+
 
+
 
|-
 
|-
 
|}
 
|}
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{| border=1 cellspacing=0 cellpadding=5  
 
{| border=1 cellspacing=0 cellpadding=5  
 
|-bgcolor="#CCCCCC" valign="top"
 
|-bgcolor="#CCCCCC" valign="top"
!Version
+
!width="75px"|Version
!Released
+
!width="75px"|Released
!Description
+
!width="600px"|Description
!Contact
+
!width="200px"|Contact
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v11-01|v11-01]]
 +
|Jan 2017
 +
|[[GEOS-Chem species database]]
 +
|[[GEOS-Chem Support Team]]
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v11-01|v11-01]]
 +
|Jan 2017
 +
|[[Sulfate_aerosols#Update_DMS_climatology_to_Lana|Update DMS climatology to Lana]]
 +
|Tom Breider (Harvard)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v11-01|v11-01]]
 +
|Jan 2017
 +
|[[Wet_deposition#Impaction_scavenging_for_hydrophobic_BC_and_homogeneous_IN_removal|Impaction scavenging for hydrophobic BC]]
 +
|Qiaoqiao Wang (Max Planck Institute)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v11-01|v11-01]]
 +
|Jan 2017
 +
|[[Wet_deposition#Impaction_scavenging_for_hydrophobic_BC_and_homogeneous_IN_removal|Homogeneous IN removal]]
 +
|Qiaoqiao Wang (Max Planck Institute)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v11-01|v11-01]]
 +
|Jan 2017
 +
|[[Aerosols_Working_Group#Organic_Aerosol_Density_.28v.10-01.29|Density of OA update]]
 +
|Melanie Hammer (Dalhousie)<br>Elo&iuml;se Marais (Harvard)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v11-01|v11-01]]
 +
|Jan 2017
 +
|[[Mineral_dust_aerosols#Improved_dust_size_distribution_scheme|Improved dust size distribution scheme]]
 +
|Li Zhang (Colorado U.)<br>Daven Henze (Colorado U.)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v11-01|v11-01]]
 +
|Jan 2017
 +
|[[Aerosol_optical_properties#Implementation_of_optical_properties_for_brown_carbon|Addition of BrC UV absorption to address impacts on OH]]
 +
*This feature is optional (default off)
 +
|Melanie Hammer (Dalhousie)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v11-01|v11-01]]
 +
|Jan 2017
 +
|[[Mineral_dust_aerosols#Surface_chemistry_on_dust|Acid uptake on dust aerosols]]
 +
*This feature is optional (default off)
 +
|T. Duncan Fairlie (NASA/LARC)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v11-01|v11-01]]
 +
|Jan 2017
 +
|[[Mineral_dust_aerosols#Now_treat_DST2-DST4_as_coarse_mode_in_wet_scavenging|Now treat DST2-DST4 as coarse mode in wet scavenging]]
 +
|T. Duncan Fairlie (NASA/LARC)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v11-01|v11-01]]
 +
|Jan 2017
 +
|[[Aerosol emissions#Online emission of marine primary organic aerosol .28POA.29|Online emission of marine primary organic aerosol (POA)]]
 +
*This feature is optional (default off)
 +
|Brett Gantt (NCSU)<br>Matthew Johnson (NASA Ames)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v11-01|v11-01]]
 +
|Jan 2017
 +
|[[Particulate_matter_in_GEOS-Chem#PM2.5_diagnostic|PM2.5 diagnostic]]
 +
|[[GEOS-Chem Support Team]]
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v10-01|v10-01]]
 +
|June 2015
 +
|[[HEMCO|The HEMCO emissions component]] now handles all emissions.  Emissions for [[Sea salt aerosols]] and [[Mineral dust aerosols]] are now coded as HEMCO extensions.
 +
|Christoph Keller (fmr Harvard)<br>[[GCST]]
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v10-01|v10-01]]
 +
|June 2015
 +
|[[Coupling GEOS-Chem with RRTMG|Integrating a radiative transfer model into GEOS-Chem]]
 +
|David Ridley (MIT)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v9-02|v9-02]]
 +
|Mar 2014
 +
|[[Secondary organic aerosols#SOA simulation with semi-volatile POA|Expansion of SOA option (SOA + nonvolatile POA)]]
 +
|Havala Pye (formerly Caltech, now EPA)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v9-02|v9-02]]
 +
|Mar 2014
 +
|[[Sulfate_aerosols#Cloud_water_pH_for_sulfate_formation|Cloud water pH for sulfate formation]]
 +
|Becky Alexander (U. Washington)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v9-02|v9-02]]
 +
|Mar 2014
 +
|[[Aerosol_optical_properties#Better_representation_of_OC_growth_with_RH_and_correction_to_sulfate_optics|Better representation of OC growth with RH and correction to sulfate optics]]
 +
|David Ridley (MIT)<br>Randall Martin (Dalhousie)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v9-02|v9-02]]
 +
|Mar 2014
 +
|[[Aerosol_optical_properties#Fix_to_jv_spec_aod.dat|Bug fix in jv_spec_aod.dat for dust species]]
 +
|Gabriele Curci (U. L'Aquila)
 +
 
 +
|-valign="top"
 +
|[[GEOS-Chem v9-02|v9-02]]
 +
|Mar 2014
 +
|[[Sea_salt_aerosols#Update_molecular_weight_of_sea_salt_tracers|Update molecular weight of sea salt tracers]]
 +
|Colette Heald (MIT)
  
 
|-valign="top"
 
|-valign="top"
Line 314: Line 364:
 
|[[FlexAOD]] post-processing tool for the community
 
|[[FlexAOD]] post-processing tool for the community
 
|Gabriele Curci, University of l'Aquila
 
|Gabriele Curci, University of l'Aquila
 
|-valign="top"
 
|[[GEOS-Chem v8-03-02|v8-03-02]]
 
|Sep 2010
 
|Using GEOS-5 liquid water content (LWC) and cloud fraction fields directly (rather than a parameterization) for aqueous sulfate chemistry
 
|Jenny Fisher, Harvard
 
 
|-valign="top"
 
|[[GEOS-Chem v8-03-02|v8-03-02]]
 
|Sep 2010
 
|Implementation of new Bond et al. BC/OC emissions
 
* NOTE: Aerosol comparisons have been added to the standard 1 year benchmark, including speciated IMPROVE and PM2.5 from North America and Europe.  Others are welcome to contribute 2005 observations to this effort (Colette Heald, CSU)
 
|E. Leibensperger, Harvard
 
 
|-valign="top"
 
|[[GEOS-Chem v8-03-01|v8-03-01]]
 
|May 2010
 
|[[Photolysis mechanism#Updated aerosol optical properties|Updating of GEOS-Chem aerosol optics]]
 
|Colette Heald, CSU
 
 
|-valign="top"
 
|[[GEOS-Chem v8-03-01|v8-03-01]]
 
|May 2010
 
|[[ISORROPIA II]] in GEOS-Chem, implemented along with new isoprene chemistry from Caltech
 
|Havala Pye, (formerly Caltech, now EPA)
 
 
|-valign="top"
 
|[[GEOS-Chem v8-03-01|v8-03-01]]
 
|May 2010
 
|[[Secondary organic aerosols#Modification to SOA formulation|Recommendation to remove SOA condensation in inorganic aerosol from standard code]]
 
|Colette Heald, CSU
 
 
|-valign="top"
 
|[[GEOS-Chem v8-03-01|v8-03-01]]
 
|May 2010
 
|Adding aromatic SOA to standard code, released with [[New isoprene scheme|Caltech isoprene chemistry]]
 
|Daven Henze, CU Boulder
 
 
|-valign="top"
 
|[[GEOS-Chem v8-03-01|v8-03-01]]
 
|May 2010
 
|Implementation of [[TOMAS aerosol microphysics]] model
 
|Peter Adams, CMU
 
 
|-valign="top"
 
|[[GEOS-Chem v8-02-04|v8-02-04]]
 
|Feb 2010
 
|Implementation of new [[Volcanic SO2 emissions from Aerocom|volcanic emissions of SO2 from AeroCom]]
 
|Jenny Fisher, Harvard
 
 
|-valign="top"
 
|[[GEOS-Chem v8-02-04|v8-02-04]]
 
|Feb 2010
 
|[[Sea salt aerosols#Updates to sea salt emissions algorithm|Updates and fixes to sea salt routine]]
 
|Lyatt Jaegle, UW<br>Becky Alexander, UW
 
  
 
|}
 
|}
  
--[[User:Bmy|Bob Y.]] 15:48, 6 September 2012 (EDT)
+
--[[User:Colette Heald|Colette Heald]] 16:14, 8 May 2015 (EST)
  
 
== On-going Aerosol Working Group Developments ==
 
== On-going Aerosol Working Group Developments ==
Line 380: Line 375:
 
{| border=1 cellspacing=0 cellpadding=5  
 
{| border=1 cellspacing=0 cellpadding=5  
 
|-bgcolor="#CCCCCC" valign="top"
 
|-bgcolor="#CCCCCC" valign="top"
!Update
+
!width="600px"|Update
!Authors
+
!width="200px"|Authors
!Planned release
+
!width="200px"|Planned release
 
+
|-valign="top"
+
|Integrating a radiative transfer model into GEOS-Chem
+
|Colette Heald (MIT)<br>David Ridley (MIT)<br>Karen Cady-Pereira (AER)<br>Matt Alvarado (AER)
+
|[[GEOS-Chem v9-03]] or later
+
 
+
|-valign="top"
+
|[[Secondary organic aerosols#SOA simulation with semi-volatile POA|Expansion of SOA option (SOA + nonvolatile POA)]]
+
|Havala Pye (formerly Caltech, now EPA)
+
|Implemented in [[GEOS-Chem v9-02|v9-02]], awaiting release
+
 
+
 
|-valign="top"
 
|-valign="top"
 
|[[Mineral dust aerosols#Surface chemistry on dust|Simplified description of uptake of SO2, nitric acid and sulfuric acid on mineral dust]]
 
|[[Mineral dust aerosols#Surface chemistry on dust|Simplified description of uptake of SO2, nitric acid and sulfuric acid on mineral dust]]
 
|Duncan Fairlie, Langley
 
|Duncan Fairlie, Langley
|Delivered to [[GEOS-Chem Support Team|GCST]]; slated for [[GEOS-Chem v9-02|v9-02]]
+
|
 
+
*Delivered to [[GEOS-Chem Support Team|GCST]]
 +
*Slated for inclusion into [[GEOS-Chem v10-02|v10-02]]
 
|}
 
|}
  
--[[User:Bmy|Bob Y.]] 15:49, 6 September 2012 (EDT)
+
--[[User:Bmy|Bob Y.]] 15:05, 25 April 2014 (EDT)
  
 
== Future Development Priorities ==
 
== Future Development Priorities ==
  
These topics were raised at the IGC5 as future updates & development priorities for GEOS-Chem (with additions from the community in recent months):  
+
These are topics which were raised at IGC6 as future updates & development priorities for GEOS-Chem which have not yet been incorporated into the standard code:  
  
 
{| border=1 cellspacing=0 cellpadding=5  
 
{| border=1 cellspacing=0 cellpadding=5  
 
|-bgcolor="#CCCCCC" valign="top"
 
|-bgcolor="#CCCCCC" valign="top"
!Update
+
!width="600px"|Update
!Authors
+
!width="200px"|Authors
!Priority
+
!width="200px"|Priority
 
+
|-valign="top"
+
|Integrating online radiative forcing calculations into GEOS-Chem
+
|Colette Heald (MIT), David Ridley (MIT)
+
|high
+
  
 
|-valign="top"
 
|-valign="top"
 
|Addition of effective wind speed to met fields for consistent resolution dust/sea salt emissions
 
|Addition of effective wind speed to met fields for consistent resolution dust/sea salt emissions
|Jeff Pierc (Dalhousie), David Ridley (MIT) and GCST
+
|Jeff Pierce (CSU)<br>David Ridley (MIT)<br>[[GEOS-Chem Support Team|GCST]]
 
|medium
 
|medium
  
Line 451: Line 431:
 
|TOMAS capability for nested grid
 
|TOMAS capability for nested grid
 
|Jeff Pierce (Dalhousie)
 
|Jeff Pierce (Dalhousie)
|
 
 
|-valign="top"
 
|Cloudwater pH for sulfate formation
 
|Becky Alexander (U Washington)
 
 
|
 
|
  
Line 467: Line 442:
 
|Rokjin Park (Seoul National University)
 
|Rokjin Park (Seoul National University)
 
|
 
|
 
 
  
 
|}
 
|}
  
--[[User:Cheald|Colette Heald]] 12:39, 9 May 2011 (EDT)<br>
+
--[[User:Bmy|Bob Y.]] 15:04, 25 April 2014 (EDT)
--[[User:Bmy|Bob Y.]] 14:14, 8 August 2011 (EDT)
+
  
 
== Aerosol optical properties ==
 
== Aerosol optical properties ==
  
Please visit our new [[Aerosol optical properties|aerosol optical properties wiki page]] for more information about:
+
Please visit our [[Aerosol optical properties|aerosol optical properties wiki page]] for more information about:
  
 
# [http://www.atmos.colostate.edu/~heald/docs/GEOS_Chem_optics_description.pdf  Description of GEOS-Chem aerosol optics]  
 
# [http://www.atmos.colostate.edu/~heald/docs/GEOS_Chem_optics_description.pdf  Description of GEOS-Chem aerosol optics]  
Line 483: Line 455:
 
# [[Aerosol optical properties#Aerosol optical properties at high spectral resolution|Aerosol optical properties at high spectral resolution]]
 
# [[Aerosol optical properties#Aerosol optical properties at high spectral resolution|Aerosol optical properties at high spectral resolution]]
  
Here is a list of updates that were considered (2, 4 and 5 are included in the [[GEOS-Chem v8-03-01|v8-03-01]] update):
+
Here is a list of updates that were considered when this was last reviewed in 2010 (2, 4 and 5 are included in the [[GEOS-Chem v8-03-01|v8-03-01]] update):
  
 
{| border=1 cellspacing=0 cellpadding=5
 
{| border=1 cellspacing=0 cellpadding=5
 
|- bgcolor="#cccccc"
 
|- bgcolor="#cccccc"
!Proposed Update (include information on old values if known)
+
!width="600px"|Proposed Update (include information on old values if known)
!Reference
+
!width="200px"|Reference
!Contact
+
!width="200px"|Contact
 
|-
 
|-
 
|Account for absorption in the 300-500 nm range by OC, which may be greater than presently treated.  Currently we have OC ss albedo in this range being > 0.95, though it may be lower than 0.85.
 
|Account for absorption in the 300-500 nm range by OC, which may be greater than presently treated.  Currently we have OC ss albedo in this range being > 0.95, though it may be lower than 0.85.
Line 505: Line 477:
 
|Consider changing the "default" AOD diagnostic wavelength from 400 nm to 550nm (for matching with MODIS & CALIPSO)
 
|Consider changing the "default" AOD diagnostic wavelength from 400 nm to 550nm (for matching with MODIS & CALIPSO)
 
|N/A
 
|N/A
|[mailto:heald@atmos.colostate.edu.edu Colette Heald]  
+
|[mailto:heald@mit.edu Colette Heald]  
 
|-
 
|-
 
|Treat the radius of hydrophylic organic aerosol similar to that of sulfate.  This is based on observations that organic aerosol and sulfate are often internally mixed.  Should we consider something similar for black carbon?     
 
|Treat the radius of hydrophylic organic aerosol similar to that of sulfate.  This is based on observations that organic aerosol and sulfate are often internally mixed.  Should we consider something similar for black carbon?     
 
|[http://cat.inist.fr/?aModele=afficheN&cpsidt=17219054 Rupkheti et al., 2007]
 
|[http://cat.inist.fr/?aModele=afficheN&cpsidt=17219054 Rupkheti et al., 2007]
 
|[mailto:randall.martin@dal.ca Randall Martin]  
 
|[mailto:randall.martin@dal.ca Randall Martin]  
 +
|}
 +
 +
 +
Additional updates to aerosol optics since v8-03-01:
 +
 +
{| border=1 cellspacing=0 cellpadding=5
 +
|- bgcolor="#cccccc"
 +
!width="600px"|Update
 +
!width="200px"|Version Number
 +
!width="200px"|Contact
 +
|-
 +
|[[GEOS-Chem_v9-01-02#Overhaul of aerosol optical depth diagnostics|Overhaul of AOD diagnostics]]
 +
|v9-01-02
 +
|Patrick Kim (Harvard)
 +
|-
 +
|[[Mineral dust aerosols#Sub-micron dust mass partitioning change|Dust submicron size distribution for optics]]
 +
|v9-01-03
 +
|David Ridley (CSU, now MIT)
 +
|-
 +
|[[Aerosol_optical_properties#Fix_to_jv_spec_aod.dat|Bug fix in jv_spec_aod.dat for dust species]]
 +
|v9-02
 +
|Gabriele Curci (l'Aquila)
 +
|-
 +
|[[Aerosol optical properties#Better representation of OC growth with RH and correction to sulfate optics|Update jv_spec.dat and jv_spec_aod.dat with better representation of OC growth with RH and correction to sulfate optics]]
 +
|v9-02
 +
|Dave Ridley (MIT) and Randall Martin (Dalhousie)
 
|}
 
|}
  
Line 525: Line 523:
 
* [[Sulfate aerosols]]
 
* [[Sulfate aerosols]]
 
* [[ISORROPIA II]]
 
* [[ISORROPIA II]]
* [[Photolysis mechanism|Photolysis mechanism in GEOS-Chem]]
+
* [[Photolysis mechanism|Photolysis mechanisms in GEOS-Chem]]
  
 
== Issues / Topics for Discussion ==
 
== Issues / Topics for Discussion ==
 +
 +
=== Organic Aerosol Density (v.10-01) ===
 +
 +
<span style="color:green">'''''This update was validated with [[GEOS-Chem_v11-01_benchmark_history#v11-01b|1-month benchmark simulation v11-01b]] and [[GEOS-Chem_v11-01_benchmark_history#v11-01b-Run0|1-year benchmark simulation v11-01b-Run0]]. This version was approved on 19 Aug 2015.'''''</span>
 +
 +
The organic aerosol density (1800 kg/m3) for calculating aerosol optical depth in aerosol_mod.F, based on Hess et al. (1997), is outdated and not representative of organic aerosols. The value is for a generic water soluble aerosol that could include sulfate, nitrate, SOA etc. Instead, we suggest GEOS-Chem users replace this with a density of 1300 kg/m3. There are numerous references that corroborate this value, or a value between 1200-1400 kg/m3. There are too many to list, but see for example p. 5174-5175 of Hallquist et al., ACP, 2007.
 +
 +
To make the change in aerosol_mod.F simply replace '''MSDENS(3) = 1800''' with '''MSDENS(3) = 1300''' in the RDAER subroutine. This leads to a 40% increase in organic carbon AOD.
 +
 +
Update by Eloise Marais (Harvard) and Melanie Hammer (Dalhousie).
 +
 +
--[[User:Emarais|Emarais]] 21:06, 6 May 2015 (EDT)
 +
 +
=== Sedimentation of stratospheric aerosols ===
 +
 +
<span style="color:darkorange">'''''This update is slated for inclusion in [[GEOS-Chem v11-02]].'''''</span>
 +
 +
'''''Daniel Jacob wrote:'''''
 +
 +
:An issue has come up with our treatment of stratospheric aerosols. Seb Eastham applies sedimentation to sulfate and BC aerosols in his [[UCX_chemistry_mechanism|UCX code]] but he does not apply sedimentation to other aerosol species nor is his sedimentation code used in other GEOS-Chem simulations. It would be good to have consistency across aerosol types and across simulations (tropchem, RnPbBe...).
 +
 +
--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 16:38, 20 August 2015 (UTC)

Latest revision as of 15:23, 7 August 2020

All users interested in the GEOS-Chem aerosol simulations are encouraged to subscribe to the aerosols email list (click on the link in the contact information section below).

Information on existing projects and future developments in aerosols will be posted here. We encourage user groups to keep their information up-to-date.

Contact information

Aerosols Working Group Co-Chairs
Aerosols Working Group email list geos-chem-aerosols [at] g.harvard.edu
To subscribe to email list Either
  • Send an email to geos-chem-aerosols+subscribe [at] g.harvard.edu

Or

To unsubscribe from email list Either
  • Send an email to geos-chem-aerosols+unsubscribe [at] g.harvard.edu

Or

--Bob Y. (talk) 16:34, 21 August 2015 (UTC)

Current GEOS-Chem Aerosol Projects, alphabetized by institution (please add yours!)

User Group Description Contact Person Date Added
Beijing/SUNY-Albany/L'Aquila Representing GEOS-Chem in the AEROCOM intercomparisons May Fu
Fangqun Yu
Gabriele Curci
28 Jul 2010
Columbia University Multiphase SOA formation in GEOS-Chem Faye McNeill 23 Apr 2015
Dalhousie Decadal trends in PM2.5 Chi Li 13 Apr 2017
Dalhousie Arctic aerosol number distributions Betty Croft 13 Apr 2017
Dalhousie Arctic black carbon Junwei Xu 13 Apr 2017
Dalhousie Metals in PM2.5 Junwei Xu 13 Apr 2017
Dalhousie Interpreting SPARTAN to understand PM2.5 chemical composition Crystal Weagle 13 April 2017
Dalhousie Aerosol mass scattering efficiency Robyn Latimer 13 April 2017
Harvard Particulate sulfur via sulfur-formaldehyde (hydroxymethane sulfonate) chemistry in clouds Jonathan Moch 14 Dec 2018
MIT/Harvard Implementing MOSAIC aerosols into GEOS-Chem Sebastian Eastham 11 May 2015
MIT Developing a simulation of bioaerosol Ruud Janssen 12 Apr 2017
MIT Investigating spread in carbonaceous aerosol impacts from fires due to emissions uncertainty Tess Carter 29 Apr 2019
MIT Testing OA simulation schemes against suite of airborne observations Sid Pai 29 Apr 2019
MIT Exploring aerosol simulation against remote observations from ATom Chloe Gao 29 Apr 2019
SUNY-Albany Effects of size-resolved aerosol microphysics on aerosol radiative forcing and chemistry Fangqun Yu
Gan Luo
5 May 2015
SUNY-Albany Combining Measurements and Model Simulations of Particle Size Distributions to Improve Our Understanding of Particle Formation and Growth Fangqun Yu
Gan Luo
4 May 2017
SUNY-Albany Long-Term Trend of Particle Number Concentrations: Controlling Processes and Implications Fangqun Yu
Gan Luo
4 May 2017
UW Sources of sea salt aerosol in polar regions: Blowing snow and Frost flowers Jiayue Huang
Lyatt Jaeglé
22 Apr 2015
UW Sea salt aerosols and their effects on global tropospheric chemistry Lyatt Jaeglé
Jiayue Huang
22 Apr 2015
UW Sulfate formation via oxidation of SO2 by hypohalous acids (e.g., HOBr) Becky Alexander
Qianjie Chen
22 April 2015
University of Wollongong Characterizing interannual variability of Australian dust export and deposition Jesse Greenslade
Jenny Fisher
23 April 2015
L'Aquila Analysis of aerosol optical properties using FlexAOD Gabriele Curci 16 Apr 2017
L'Aquila AeroCom phase-3 intercomparisons: Biomass Burning, INSITU, Remote Sensing Gabriele Curci 16 Apr 2017
L'Aquila Direct and first indirect effect of anthropogenic dust Gabriele Curci 16 Apr 2017
NIA / NASA LaRC Radiative effects of aerosols versus clouds on key tropospheric oxidants Hongyu Liu 5 May 2015
NIA / NASA LaRC Sources and variability of tropospheric aerosols over the North Atlantic Hongyu Liu 5 May 2015
UCLA Improve black carbon simulations in GEOS-Chem; BC aging microphysics; BC-snow interaction; BC radiative properties; Cenlin He 8 May 2015
UCLA Black carbon emissions, simulations and its radiative effects over the Arctic Ling Qi 8 May 2015
UCLA Improve aerosol wet scavenging and dry deposition in GEOS-Chem Ling Qi
Cenlin He
8 May 2015

Recent GEOS-Chem updates related to aerosols

We have added the following updates pertaining to aerosols to recent GEOS-Chem versions:

Version Released Description Contact
v11-01 Jan 2017 GEOS-Chem species database GEOS-Chem Support Team
v11-01 Jan 2017 Update DMS climatology to Lana Tom Breider (Harvard)
v11-01 Jan 2017 Impaction scavenging for hydrophobic BC Qiaoqiao Wang (Max Planck Institute)
v11-01 Jan 2017 Homogeneous IN removal Qiaoqiao Wang (Max Planck Institute)
v11-01 Jan 2017 Density of OA update Melanie Hammer (Dalhousie)
Eloïse Marais (Harvard)
v11-01 Jan 2017 Improved dust size distribution scheme Li Zhang (Colorado U.)
Daven Henze (Colorado U.)
v11-01 Jan 2017 Addition of BrC UV absorption to address impacts on OH
  • This feature is optional (default off)
Melanie Hammer (Dalhousie)
v11-01 Jan 2017 Acid uptake on dust aerosols
  • This feature is optional (default off)
T. Duncan Fairlie (NASA/LARC)
v11-01 Jan 2017 Now treat DST2-DST4 as coarse mode in wet scavenging T. Duncan Fairlie (NASA/LARC)
v11-01 Jan 2017 Online emission of marine primary organic aerosol (POA)
  • This feature is optional (default off)
Brett Gantt (NCSU)
Matthew Johnson (NASA Ames)
v11-01 Jan 2017 PM2.5 diagnostic GEOS-Chem Support Team
v10-01 June 2015 The HEMCO emissions component now handles all emissions. Emissions for Sea salt aerosols and Mineral dust aerosols are now coded as HEMCO extensions. Christoph Keller (fmr Harvard)
GCST
v10-01 June 2015 Integrating a radiative transfer model into GEOS-Chem David Ridley (MIT)
v9-02 Mar 2014 Expansion of SOA option (SOA + nonvolatile POA) Havala Pye (formerly Caltech, now EPA)
v9-02 Mar 2014 Cloud water pH for sulfate formation Becky Alexander (U. Washington)
v9-02 Mar 2014 Better representation of OC growth with RH and correction to sulfate optics David Ridley (MIT)
Randall Martin (Dalhousie)
v9-02 Mar 2014 Bug fix in jv_spec_aod.dat for dust species Gabriele Curci (U. L'Aquila)
v9-02 Mar 2014 Update molecular weight of sea salt tracers Colette Heald (MIT)
v9-01-03 Sep 2012 Dust submicron size distribution for optics Dave Ridley, CSU
v9-01-03 Sep 2012 Modifications to sea salt emissions and dry deposition Lyatt Jaegle and Becky Alexander, U Washington
v9-01-03 Sep 2012 Various updates to wet deposition to impact aerosol simulation, see Wet Deposition Further Updates Qiaoqiao Wang, Harvard
v9-01-02 Nov 2011 Implementation of APM aerosol microphysics model Fangqun Yu, SUNY Albany
Gan Luo, SUNY Albany
v9-01-02 Nov 2011 Removing inconsistencies in aerosol diagnostics Sungshik Patrick Kim, Harvard
v9-01-02 Nov 2011 Updated aerosol dry deposition velocities over snow and ice surfaces Jenny Fisher, Harvard
v9-01-02 Nov 2011 Added seasonality to Streets NH3 emissions over Asia Jenny Fisher, Harvard
v9-01-01 Jun 2011 FlexAOD post-processing tool for the community Gabriele Curci, University of l'Aquila

--Colette Heald 16:14, 8 May 2015 (EST)

On-going Aerosol Working Group Developments

We plan to add these aerosol-related updates to GEOS-Chem in the next few releases:

Update Authors Planned release
Simplified description of uptake of SO2, nitric acid and sulfuric acid on mineral dust Duncan Fairlie, Langley
  • Delivered to GCST
  • Slated for inclusion into v10-02

--Bob Y. 15:05, 25 April 2014 (EDT)

Future Development Priorities

These are topics which were raised at IGC6 as future updates & development priorities for GEOS-Chem which have not yet been incorporated into the standard code:

Update Authors Priority
Addition of effective wind speed to met fields for consistent resolution dust/sea salt emissions Jeff Pierce (CSU)
David Ridley (MIT)
GCST
medium
Addition of deposition observations to aerosol benchmark Colette Heald (MIT) low
dust simulation expansion (tagged simulation, oxalate, P, Fe chemistry) Matthew Johnson (NC State) low
DMS oxidation scheme updating TBD low
Investigation of how aerosol water is treated in PM comparisons (ISORROPIA vs. hygroscopic growth curves) TBD low
APM capability for nested grid Fangqun Yu (SUNY Albany)
TOMAS capability for nested grid Jeff Pierce (Dalhousie)
Tagged sulfate and nitrate simulation Becky Alexander (U. Washington)
Improved dust simulation in nested-grid model Rokjin Park (Seoul National University)

--Bob Y. 15:04, 25 April 2014 (EDT)

Aerosol optical properties

Please visit our aerosol optical properties wiki page for more information about:

  1. Description of GEOS-Chem aerosol optics
  2. Aerosol optical properties update for v8-03-01
  3. Aerosol optical properties at high spectral resolution

Here is a list of updates that were considered when this was last reviewed in 2010 (2, 4 and 5 are included in the v8-03-01 update):

Proposed Update (include information on old values if known) Reference Contact
Account for absorption in the 300-500 nm range by OC, which may be greater than presently treated. Currently we have OC ss albedo in this range being > 0.95, though it may be lower than 0.85. Barnard et al, 2008 Daven Henze
Expand Mie table to include more wavelengths. Most literature values compare at 500 or 550 nm. Current GC lookup table includes 400, then 600. A wider range is also necessary for integrating to get total SW flux; something greater than 1500 perhaps? Martin et al, 2004 Daven Henze
Consider using the water content of the fine mode aerosol calculated in the aerosol thermodynamic module rather than hygroscopic growth curves to estimate wet particle effective radius. N/A Daven Henze
Consider changing the "default" AOD diagnostic wavelength from 400 nm to 550nm (for matching with MODIS & CALIPSO) N/A Colette Heald
Treat the radius of hydrophylic organic aerosol similar to that of sulfate. This is based on observations that organic aerosol and sulfate are often internally mixed. Should we consider something similar for black carbon? Rupkheti et al., 2007 Randall Martin


Additional updates to aerosol optics since v8-03-01:

Update Version Number Contact
Overhaul of AOD diagnostics v9-01-02 Patrick Kim (Harvard)
Dust submicron size distribution for optics v9-01-03 David Ridley (CSU, now MIT)
Bug fix in jv_spec_aod.dat for dust species v9-02 Gabriele Curci (l'Aquila)
Update jv_spec.dat and jv_spec_aod.dat with better representation of OC growth with RH and correction to sulfate optics v9-02 Dave Ridley (MIT) and Randall Martin (Dalhousie)

Related Topics

Issues / Topics for Discussion

Organic Aerosol Density (v.10-01)

This update was validated with 1-month benchmark simulation v11-01b and 1-year benchmark simulation v11-01b-Run0. This version was approved on 19 Aug 2015.

The organic aerosol density (1800 kg/m3) for calculating aerosol optical depth in aerosol_mod.F, based on Hess et al. (1997), is outdated and not representative of organic aerosols. The value is for a generic water soluble aerosol that could include sulfate, nitrate, SOA etc. Instead, we suggest GEOS-Chem users replace this with a density of 1300 kg/m3. There are numerous references that corroborate this value, or a value between 1200-1400 kg/m3. There are too many to list, but see for example p. 5174-5175 of Hallquist et al., ACP, 2007.

To make the change in aerosol_mod.F simply replace MSDENS(3) = 1800 with MSDENS(3) = 1300 in the RDAER subroutine. This leads to a 40% increase in organic carbon AOD.

Update by Eloise Marais (Harvard) and Melanie Hammer (Dalhousie).

--Emarais 21:06, 6 May 2015 (EDT)

Sedimentation of stratospheric aerosols

This update is slated for inclusion in GEOS-Chem v11-02.

Daniel Jacob wrote:

An issue has come up with our treatment of stratospheric aerosols. Seb Eastham applies sedimentation to sulfate and BC aerosols in his UCX code but he does not apply sedimentation to other aerosol species nor is his sedimentation code used in other GEOS-Chem simulations. It would be good to have consistency across aerosol types and across simulations (tropchem, RnPbBe...).

--Melissa Sulprizio (talk) 16:38, 20 August 2015 (UTC)