Aerosols Working Group: Difference between revisions
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*[http://www.atmos.washington.edu/blog/beckya/becky-alexander/ Becky Alexander] (GitHub: [https://github.com/beckyalexander @beckyalexander]) | *[http://www.atmos.washington.edu/blog/beckya/becky-alexander/ Becky Alexander] (GitHub: [https://github.com/beckyalexander @beckyalexander]) | ||
*[http://pierce.atmos.colostate.edu/people.htm#jeff Jeff Pierce] (GitHub: [https://github.com/theloniuspunk @theloniuspunk]) | *[http://pierce.atmos.colostate.edu/people.htm#jeff Jeff Pierce] (GitHub: [https://github.com/theloniuspunk @theloniuspunk]) | ||
*[https://profiles.ucr.edu/app/home/profile/wporter Will Porter] (Github https://github.com/wporter @wporter) | |||
*[http://www.albany.edu/~yfq/ Fangqun Yu] | *[http://www.albany.edu/~yfq/ Fangqun Yu] | ||
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== Current GEOS-Chem Aerosol Projects, alphabetized by institution (please add yours!) == | == Current GEOS-Chem Aerosol Projects, alphabetized by institution (please add yours!) == | ||
Revision as of 19:12, 23 March 2022
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
Or
|
| To unsubscribe from email list | Either
Or
|
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 |
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
|
Melanie Hammer (Dalhousie) |
| v11-01 | Jan 2017 | Acid uptake on dust aerosols
|
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)
|
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 |
--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:
- Description of GEOS-Chem aerosol optics
- Aerosol optical properties update for v8-03-01
- 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
- Aerosol emissions
- Aerosol microphysics simulations:
- Aerosol-only simulation
- Aerosol thermodynamical equilibrium
- Carbonaceous aerosols
- Mineral dust aerosols
- Secondary organic aerosols
- Sea salt aerosols
- Sulfate aerosols
- ISORROPIA II
- Photolysis mechanisms in GEOS-Chem
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)