Difference between revisions of "GEOS-Chem v11-02"
(→In the pipeline) |
(→In the pipeline) |
||
Line 145: | Line 145: | ||
|-valign="top" | |-valign="top" | ||
− | |[[UCX_stratospheric_water_boundary_condition_update|UCX stratospheric water boundary condition update]] | + | |[[UCX_chemistry_mechanism#UCX_stratospheric_water_boundary_condition_update|UCX stratospheric water boundary condition update]] |
|Science | |Science | ||
|Chris Holmes (UC Irvine)<br>Seb Eastham (Harvard) | |Chris Holmes (UC Irvine)<br>Seb Eastham (Harvard) |
Revision as of 20:09, 5 January 2017
Contents
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 (U. Florida) Mat Evans (U. York) Oxidants and Chemistry WG |
|
PAN updates | Science | Emily Fischer (CSU) |
|
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 |
v11-02c
Feature | Type | Submitted by | Status |
---|---|---|---|
Updates to isoprene chemistry, includes:
|
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) |
|
Add aqueous isoprene uptake to SOA scheme | Science | Eloise Marais (Harvard) |
|
Monthly mean surface methane distributions | Science | Lee Murray (NASA GISS/LDEO) | |
Radon flux diagnostic | Benchmark | GCST |
In the pipeline
Feature | Type | Submitted by | Status |
---|---|---|---|
UCX stratospheric water boundary condition update | Science | Chris Holmes (UC Irvine) Seb Eastham (Harvard) |
|
Ocean grid boxes now use the timezone of the nearest land mass for computing emissions | Science | Seb Eastham (Harvard) GCST |
|
EDGAR v4.3 emissions | Science | Chi Li (Dalhousie) |
|
EPA-derived BC/OA emissions over US (1990-2012) | Science | David Ridley (MIT) | |
Historical CAC emissions | Science | Chi Li (Dalhousie) |
|
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) |
|
A snow NOx source from deep snowpack | Science | Maria Zatko (UW) Becky Alexander (UW) |
|
Fix to direct/diffuse radiation | Science | Katie Travis (Harvard) | |
Species Database Phase 3:
|
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) |
|
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 |
|
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:
|
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) |
|
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 |
--Melissa Sulprizio (talk) 15:47, 7 November 2016 (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
Ocean grid boxes now use the timezone of the nearest land mass for computing emissions
NOTE: This update will be implemented and fully validated in v11-02. In the meantime, interested users may select this option for v11-01 at their own risk.
Seb Eastham wrote:
Here are the HEMCO timezones used by default in GEOS-Chem v11-01. These are read from the netCDF file HEMCO/TIMEZONES/v2015-02/timezones_1x1.edit.nc.File:Timezones V11-01 Default.png
Note that the timezones of the ocean cells in the above file are not computed robustly. As Christoph Keller points out:
The current timezones mask file does not work properly in grid cells with large ocean overlap. The problem is that the ocean values are netCDF _FillValues that become zero within HEMCO. As a quick fix I updated the timezones file to use a value of –5000 in all ocean cells, which then forces HEMCO to determine the time zone based on longitude in those cells.Please find a "nearest-cell" version of the HEMCO "timezones" file (HEMCO/TIMEZONES/v2015-02/timezones_voronoi_1x1.nc). I'd like to suggest that this replace the default HEMCO timezones file shown above. The new ("Voronoi") approach sets the timezone in every ocean cell to match that of the closest valid land cell by great circle distance. Without the update, some coastal areas will use the wrong timezone, resulting in incorrect diurnal scalings. Here is a plot of the Voronoi timezones:
As of this writing (04 Jan 2017), we expect that the Voronoi timezones will be made the default HEMCO timezones in v11-02, pending benchmarking and approval. In the meantime, interested GEOS-Chem users may select this option by updating this entry in the HEMCO_Config.rc file. Change the text in RED
* TIMEZONES $ROOT/TIMEZONES/v2015-02/timezones_1x1.edit.nc UTC_OFFSET 2000/1/1/0 C xy count * - 1 1
to the text in GREEN:
* TIMEZONES $ROOT/TIMEZONES/v2015-02/timezones_voronoi_1x1.nc UTC_OFFSET 2000/1/1/0 C xy count * - 1 1
But understand that this is to be considered "experimental" until it is officially validated in v11-02.
--Bob Yantosca (talk) 19:00, 4 January 2017 (UTC)