GEOS-Chem v11-02

Overview

History

The table below shows the previous, current, and successive versions of GEOS-Chem:

Previous version	This version	Next version
GEOS-Chem v11-01	GEOS-Chem v11-02	TBD
PROVISIONAL RELEASE 20 Dec 2016	TBD	TBD
View v11-01 benchmark history	View v11-02 benchmark history	TBD

What's new in this version

NOTE: v11-02a, v11-02b, etc. denote 1-month benchmark simulations, which are designed to evaluate GEOS-Chem's performance at intermediate stages of development.

v11-02a

Feature	Type	Submitted by	Status
Updating chemistry rate constants based on JPL Publication 15-10	Science	Barron Henderson (US EPA) Mat Evans (U. York) Oxidants and Chemistry WG
Fixes to correct ALK4 lumping issue	Science	Barron Henderson (US EPA)	Delivered to GCST (31 Jan 2017)
PAN updates	Science	Emily Fischer (CSU)	Delivered to GCST (May 2013)
Monthly mean NEI2011 emissions	Science	GCST
Implement ISORROPIA v2.0 as a Fortran module (eliminating COMMON blocks)	Structural	Seb Eastham (Harvard) GCST	Delivered to GCST (24 Jan 2017)
Update to HEMCO v2.0.004	Structural	Christoph Keller (NASA GMAO)	Delivered to GCST (26 Jan 2017)
Fix error in production of SO4S and NITs in SEASALT_CHEM routine	Bug fix	Prasad Kasibhatla (Duke)
Fix bug in CHEM_NIT routine	Bug fix	Prasad Kasibhatla (Duke)

--Melissa Sulprizio (talk) 20:59, 27 January 2017 (UTC)

v11-02b

Feature	Type	Submitted by	Status
Halogen chemistry updates	Science	Tomás Sherwen (York) Johan Schmidt (Harvard) Oxidants and Chemistry WG
Enhance default GEOS-Chem simple SOA	Science	Aerosols Working Group

--Bob Yantosca (talk) 19:48, 25 January 2017 (UTC)

v11-02c

Feature	Type	Submitted by	Status
Updates to isoprene chemistry, includes: Fast photolysis of carbonyl nitrates Aerosol uptake of organic nitrates	Science	Jenny Fisher (U. Wollongong) Eloïse Marais (Harvard) Kelvin Bates (Caltech) Katie Travis (Harvard)

--Bob Yantosca (talk) 19:34, 20 December 2016 (UTC)

v11-02d

Feature	Type	Submitted by	Status
Update density of BC to 1.8 and add absorption enhancement factor in input.geos	Science	Xuan Wang (MIT)	Delivered to GCST (Jan 2016)
Add aqueous isoprene uptake to SOA scheme	Science	Eloise Marais (Harvard)	Delivered to GCST (Jul 2016)
Monthly mean surface methane distributions	Science	Lee Murray (NASA GISS/LDEO)
Radon flux diagnostic	Benchmark	GCST
UCX stratospheric water boundary condition update	Science	Chris Holmes (UC Irvine) Seb Eastham (Harvard)	Delivered to GCST (Jan 2017)

--Bob Yantosca (talk) 19:48, 25 January 2017 (UTC)

In the pipeline

Feature	Type	Submitted by	Status
EDGAR v4.3 emissions	Science	Chi Li (Dalhousie)	Delivered to GCST (Nov 2016)
EPA-derived BC/OA emissions over US (1990-2012)	Science	David Ridley (MIT)
Historical CAC emissions	Science	Chi Li (Dalhousie)	Delivered to GCST (Nov 2016)
Default US emissions to NEI after 2011	Science	Dalhousie group
Ammonia from Arctic birds	Science	Dalhousie group
Ocean ammonia emission inventory	Science	Fabien Paulot (NOAA/GFDL)	Data files delivered to GCST (Jan 2016) Needs to be implemented via HEMCO
A snow NOx source from deep snowpack	Science	Maria Zatko (UW) Becky Alexander (UW)	Implemented in v9-01-01 Needs to be added as a HEMCO extension
Non-agricultural NH3 for use with MASAGE	Science	Amos Tai (CUHK)
Fix to direct/diffuse radiation	Science	Katie Travis (Harvard)
Species Database Phase 3: Harmonizing Henry's Law coefficients across wet and dry deposition	Science	GCST
Updated organic deposition	Science	Katie Travis (Harvard) Jenny Fisher (U. Wollongong)
Remove dependence of species drydep on HNO3 drydep	Science	Katie Travis (Harvard) Jenny Fisher (U. Wollongong)	NOTE: This was mostly achieved in GEOS-Chem v11-01, with the implementation of the GEOS-Chem species database. For example, N2O5 (which used to depend on the drydep velocity of HNO3) is now assigned the relevant dry deposition parameters in the species database. The dry deposition velocity N2O5 is now computed explicitly. This eliminates the need to manually assign the dry deposition velocity of HNO3 to N2O5 (which was done with confusing code).
Update SO2 scavenging in convective updrafts for consistency	Science	Duncan Fairlie (NASA/LARC)
Sedimentation of stratospheric aerosols	Science	Sebastian Eastham (Harvard)
Uniformity of units	Structural	GCST	Phase 2 (unit uniformity throughout chemistry) to be implemented after Flexchem Phase 3 (unit uniformity in some specialty simulations) will be implemented in pieces with input from 3rd party developers Phase 4 (removal of area and area-dependent State_Met variables) will be ongoing
NetCDF Output Phase 3a: Output diagnostics in NetCDF format	Structural	GCST
NetCDF Output Phase 3b: Updates to eliminate differences between single and multi-segmented GEOS-Chem runs	Bug fix/Structural	GCST Christoph Keller
PCB simulation	Science	Carey Friedman (MIT) Helen Amos (Harvard)
Hg code updates (chemistry, ocean, land)	Science	Hg and POPs Working Group
Surface ocean Hg boundary conditions from MITgcm	Science	Hannah Horowitz (Harvard)
Additional modifications for FlexChem, including: Rebuild the pre-built chemistry mechanisms (Standard, Tropchem, UCX, SOA, SOA-SVPOA) with Kppa Add capability for custom chemistry mechanism by building KPP on-the-fly in GEOS-Chem	Structural	Mike Long (Harvard) GCST
FlexGrid: Use HEMCO I/O and regridding capabilities to read and regrid met fields	Structural	Jiawei Zhuang (Harvard) Jintai Lin (PKU)	Delivered to GCST (Oct 2016)
Merge standard simulation with specialty simulations for OVOC, acids, aromatics, dicarbonyls, terpenes	Science	Dylan Millet (UMN) Xin Chen (UMN)
Nested CO2, CH4, Hg, TOMAS, adjoint, etc.	Science	Nested Model Working Group
Update ISORROPIA from v2.0 to v2.2, in order to remove persistent noise in output	Science	Seb Eastham (Harvard)

--Melissa Sulprizio (talk) 15:47, 7 November 2016 (UTC)
--Bob Yantosca (talk) 22:43, 23 January 2017 (UTC)

New data directories

The following HEMCO data directories have been added or updated for GEOS-Chem v11-02. You will have to download the directories relevant to your simulation.

Inventory	What was added?	When added?	Directory
TBD	TBD	TBD	TBD

Validation

In this section we provide information about the benchmarks and tests that we have done to validate GEOS-Chem v11-01.

1-month and 1-year benchmarks

For complete information about the benchmark simulations used to validate GEOS-Chem v11-02, please see our GEOS-Chem v11-02 benchmark history wiki page.

Unit tests for GEOS-Chem v11-02

We perform a full set of unit tests on GEOS-Chem on an almost daily basis. These tests ensure that each new feature being added does not break any existing functionality.

Here are the unit tests that we ran before submitting 1-month benchmark simulation for v11-02. Click on the links below to see the results from each set of unit tests:

Unit test	Date
TBD	TBD

Previous issues now resolved in GEOS-Chem v11-02

TBD

Outstanding issues not yet resolved in GEOS-Chem v11-02

TBD