Emissions Working Group
The purpose of this Working Group is to provide a forum to discuss current and new developments in GEOS-Chem associated with land-atmosphere and ocean-atmosphere sources, sinks, and fluxes of trace gases and aerosols.
All users interested in adding/updating the GEOS-Chem emissions inventories are encouraged to subscribe to the emissions email list (click on the link in the contact information section below).
Primary Working Group Contacts
| Sources and Sinks Working Group Co-Chairs | Jintai Lin and Qiang Zhang |
| Sources and Sinks Working Group email list | geos-chem-emissions [at] seas.harvard.edu |
| To subscribe to email list | Send email to geos-chem-emissions-join [at] seas.harvard.edu |
| To unsubscribe from email list | Send email to geos-chem-emissions-leave [at] seas.harvard.edu |
Who's doing what and where? [Current GEOS-Chem Research Projects on Sources and Sinks]
| User Group | Description | Contact Person | Date Added |
|---|---|---|---|
| Dalhousie | Top-down constraints on surface NOx emissions | Matthew Cooper | 27 April 2011 |
| Harvard | Methane sources in the Arctic | Christopher Pickett-Heaps | |
| Harvard | Mechanistic Lightning Parameterization | Lee Murray | |
| JPL | Comparison of adjoint and mass balance for NOx emissions | Changsub Shim | |
| U. East Anglia | COS Emissions | Parvadha Suntharalingam | |
| U. Edinburgh | Biogenic VOC emissions from tropical ecosystems | Michael Barkley | |
| U. Edinburgh | Regional methane sources using surface in situ and GOSAT and IASI satellite observations and an ensemble Kalman filter | Annemarie Fraser | |
| U. Edinburgh | Quantifying the impact of boreal biomass burning emissions on tropospheric oxidant chemistry | Mark Parrington | |
| U. Eindhoven | Constraining ship emissions using OMI NO2 observations / Soil NOx emissions | Geert Vinken | 21 June 2012 |
| U. Toronto / Env Canada | CO2 sources and sinks (fossil fuels including shipping/aviation, biosphere, ocean, etc.) | Ray Nassar | |
| U. Toronto | Adjoint analysis of CO sources from MOPITT | Zhe Jiang | |
| Peking University | Top-down constraints on Asia VOCs | May Fu | |
| Peking University | Air-sea exchange and top-down constraints on global acetone | May Fu | 29 April 2011 |
| CSU | IASI constraints on NHx | Colette Heald | |
| Tsinghua University | Bottom-up/top-down anthropogenic inventory over East Asia | Qiang Zhang | |
| CU Boulder | Top-down constraints on NH3 | Juliet Zhu | |
| US EPA | Top-down constraints on NO2 | Havala Pye | |
| U. Nebraska Lincoln | Top-down constraints on aerosols over Asia using MODIS | Richard Zu | |
| Peking University | Natural sources (soil, lightning, bb) of NOx over China: top-down vs bottom-up | Jintai Lin | 01 Nov 2010 |
| UW | Snow NOx source in Greenland and Antarctica | Becky Alexander | 07 May 2015 |
Ongoing GEOS-Chem Developments Related to Sources and Sinks (please add yours!)
Here is the list of updates that are slated to be added to GEOS-Chem in the next few releases:
| Update | Authors | Planned release |
|---|---|---|
| HEMCO emissions component | Christoph Keller (Harvard) |
|
| Update to MEGAN2.1 | Dylan Millet (Minnesota) |
|
| MEGAN biogenic emissions | Michael Barkley (Leicester) |
|
| Daily anthropogenic emissions broken down by sector from the EPA NEI2008 inventory | Katie Travis (Harvard) |
|
| FINNv1 biomass burning emissions | Jenny Fisher (Wollongong) Min Huang (JPL) |
|
| Updated Southeast Asian emissions for SEAC4RS | Jenny Fisher (Wollongong) Patrick Kim (Harvard) |
|
| Australian anthropogenic emissions | Jenny Fisher (Wollongong) |
|
--Bob Y. 18:55, 14 January 2015 (EST)
Recent GEOS-Chem Updates Related to Sources and Sinks
We have added the following updates pertaining to sources and sinks to recent GEOS-Chem versions:
--Melissa Sulprizio 10:43, 17 January 2014 (EST)
Discussions Related to Sources and Sinks (please add!)
Isoprene Emission Estimates in the Literature
Recent Papers
Evaluation of the global oceanic isoprene source and its impacts on marine organic carbon aerosol. Arnold SR, Spracklen DV, Williams J, Yassaa N, Sciare J, Bonsang B, Gros V, Peeken I, Lewis AC, Alvain S, Moulin C. ATMOSPHERIC CHEMISTRY AND PHYSICS, Volume: 9, Issue: 4, Pages: 1253-1262, Published: 2009. We have combined the first satellite maps of the global distribution of phytoplankton functional type and new measurements of phytoplankton-specific isoprene productivities, with available remote marine isoprene observations and a global model, to evaluate our understanding of the marine isoprene source and its impacts on organic aerosol abundances. Using satellite products to scale up data on phytoplankton-specific isoprene productivity to the global oceans, we infer a mean "bottom-up" oceanic isoprene emission of 0.31 +/- 0.08 (1 sigma) Tg/yr. By minimising the mean bias between the model and isoprene observations in the marine atmosphere remote from the continents, we produce a "top-down" oceanic isoprene source estimate of 1.9 Tg/yr. We suggest our reliance on limited atmospheric isoprene data, difficulties in simulating in-situ isoprene production rates in laboratory phytoplankton cultures, and limited knowledge of isoprene production mechanisms across the broad range of phytoplankton communities in the oceans under different environmental conditions as contributors to this difference between the two estimates. Inclusion of secondary organic aerosol (SOA) production from oceanic isoprene in the model with a 2% yield produces small contributions (0.01-1.4%) to observed organic carbon (OC) aerosol mass at three remote marine sites in the Northern and Southern Hemispheres. Based on these findings we suggest an insignificant role for isoprene in modulating remote marine aerosol abundances, giving further support to a recently postulated primary OC source in the remote marine atmosphere.
For current discussions of isoprene oxidation in the literature, please see our Isoprene: Recent Papers page.
Available Historical and Future Emissions
Please visit our Historical and Future Emissions wiki page for the latest information about the historical and future emissions, including any bug fixes or updates.
--Melissa Payer 15:53, 9 January 2013 (EST)