Hg and POPs Working Group

All users interested in the GEOS-Chem mercury and persistent organic pollutant (POPs) simulations are encouraged to subscribe to the Hg and POPs 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

Hg and POPs Working Group Co-Chairs	Noelle Selin and Elsie Sunderland
Hg and POPs Working Group email list	geos-chem-hg-pop [at] seas.harvard.edu
To subscribe to email list	Send email to geos-chem-hg-pop-join [at] seas.harvard.edu
To unsubscribe from email list	Send email to geos-chem-hg-pop-leave [at] seas.harvard.edu

Current GEOS-Chem Hg and POPs Projects (please add yours!)

User Group	Description	Contact Person	Date Added
UW	Hg long-range transport and deposition over Alaska	Lyatt Jaeglé	05 Jul 2010
MIT	Development of a PCB simulation and assessment of climate change impacts on pathways to the Arctic	Noelle Selin and Carey Friedman	05 May 2015
MIT	Analysis of Wet Deposition and RGM to constrain Hg-Br chemistry	Noelle Selin and Shaojie Song	05 May 2015
Harvard	Hg continental-scale source-receptor relationships	Bess Sturges Corbitt	02 Aug 2010
Harvard	Hg coupled atmosphere-terrestrial exchange and future climate change simulations	Bess Sturges Corbitt	02 Aug 2010
Harvard	Updating the surface ocean representation with methyl mercury species (focus on the Arctic)	Anne L. Soerensen	16 Nov 2011
Harvard	Fate of Hg released from products	Hannah Horowitz	22 Sep 2011
UCIrvine	Mercury isotope budget and processes	Christopher Holmes	31 Jan 2012
UCIrvine	Mercury processes in the tropics	Christopher Holmes	31 Jan 2012
MIT	Incorporating EDGAR and UNEP/AMAP 2010 emissions inventories	Noelle Selin and Shaojie Song	Jan 2013
MIT	PFOS and PFOA atmospheric simulation	Noelle Selin and Colin Pike-Thackray	17 Feb 2013
UOW	Southern Hemisphere Hg with focus on Australia (and possibly Antarctic)	Jenny Fisher	06 May 2015
MTU	Effects of climate change on atmospheric transport and deposition of mercury	Huanxin Zhang	27 Sep 2013
Harvard	Adding selenium chemistry to the slab surface ocean Hg-model	Anne L. Soerensen	15 Oct 2013
PKU	Global change impacts on Hg biogeochemical cycling: insights on atmospheric Hg trends	Long Chen	8 Aug 2014
Harvard	Improved atmospheric oxidation mechanism for Hg(0) including updated Dibble chemistry and other updates, constrained and evaluated to match the ensemble of global atmospheric observations. The mechanism will rely on updated GEOS-Chem Br and Cl fields currently being developed by Johan Schmidt in a separate Harvard project focused on reconciling the model with new aircraft and satellite observations of BrO and HOBr. Johan Schmidt's work is expected to be submitted for publication in summer 2015 and at that point his 3-D halogen fields can be submitted for inclusion in the standard GEOS-Chem Hg model. We expect to submit our finalized and evaluated Hg(0)/Hg(II) mechanism for publication in summer/fall 2015 and at that point this will also be submitted to the standard GEOS-Chem model.	Hannah Horowitz Johan Schmidt	9 Sep 2014
MIT	Developing nested policy emissions scenarios (Great Lakes, US, global)	Noelle Selin and Amanda Giang	06 May 2015
MIT	Improving representation of deposition to lakes (small fixes, potentially more based on Friedman PCB lake model)	Noelle Selin and Amanda Giang	06 May 2015
MIT	Evaluating EDGAR v4.tox2 emissions inventories, with different regional and sectoral speciation scenarios	Marilena Muntean (EDGAR lead), Shaojie Song and Amanda Giang	06 May 2015
Add yours here!

--Bob Y. 15:13, 25 April 2014 (EDT)

Recent GEOS-Chem updates related to Hg and POPs

The following development items have recently been added to GEOS-Chem:

Version	Released	Update	Author(s)
v9-02	Mar 2014	Development of GEOS-5 0.5x0.667 nested grid Hg simulation over the N. American domain	Yanxu Zhang (U. Washington)
v9-02	Mar 2014	Implement NEI 2005 Hg emission inventory over US	Yanxu Zhang (U. Washington)
v9-02	Mar 2014	Correct Hg simulation to use updated Hg(0) oxidation kinetics	Bess Corbitt(Harvard) Justin Parella (Harvard)
v9-02	Mar 2014	Option to use GEOS-Chem Br/BrO fields from Justin Parrella	Bess Corbitt(Harvard) Justin Parella (Harvard)
v9-02	Mar 2014	Streets future Hg emissions	Bess Corbitt (Harvard)
v9-02	Mar 2014	POPs simulation: Polycyclic aromatic hydrocarbons	Carey Friedman (MIT) Noelle Selin (MIT)
v9-01-03	Sep 2012	Hg(II) gas-particle partitioning	Helen Amos (Harvard)
v9-01-03	Sep 2012	Nested grid simulation over North America	Yanxu Zhang (UW)
v9-01-02	Nov 2011	Hg anthropogenic emissions options for the year 2006 or 2050 following SRES scenarios A1B, A2, B1, and B2 from Streets et al. 2009.	Bess Sturges Corbitt (Harvard)
v9-01-02	Nov 2011	Bug fixes impacting the Hg simulation: Bug fixes for the Hg simulation Further bug fixes for the Hg simulation Fix for vertical regridding of OH	Chris Holmes (UC Irvine) Team Hg GEOS-Chem Support Team

--Bob Y. 15:37, 16 January 2014 (EST)

On-going Hg and POPs Working Group Developments

Update	Contact	Status
Implement improved bromine explosion emission and chemistry in the Arctic	Jenny Fisher (Wollongong)
Implement improved snowpack reduction and re-emission in the Arctic	Jenny Fisher (Wollongong)
Implement Hg source to Arctic Ocean from riverine inputs	Jenny Fisher (Wollongong)

--Bob Y. 15:14, 25 April 2014 (EDT)

Issues / Topics for Discussion

More discussion of the Hg simulation (code, issues, diagnostics) can be found on the Mercury page.