Difference between revisions of "GEOS-Chem model development priorities"

• Ready to be added, ask GMAO

• Ready to be added

• Need to implement a fix to handle missing data for 2012/09 thru 2012/12. We can do one of 2 things:
  • Create files with zero emissions for 2012/09 thru 2012/12.
    • But because data for 2013- is copied from 2012, this will mean that the last 3 months of the year have no volcano emissions.
  • Link to the existing volcano emsisions files for September thru December

• Need to fix an "under-the-hood" issue in HEMCO that causes 1200 Tg of dust to be emitted by this update.

• Pending receipt of corrected data files

• Will require reworking of LAI regridding in GEOS-Chem Classic and pre-processing land map data

• UW version delivered to GCST (Nov 2017)

• Code has been implemented in the ancient v9-01-02 version.
• Bringing this up to the current SOA model (simple SOA, complex SOA) will likely involve significant effort.

• 3D chemical source for CO2, CO
• OH for tagged CO & CH4

• Will make data files available on ftp site

• Delivered to GCST (Dec 2017)
• Could be implemented with Jiawei Zhuang's FlexGrid

• Could be implemented with Jiawei Zhuang's FlexGrid

• Work has not yet begun

• 1-yr benchmarks for GEOS-Chem v11-01d and later include comparisons with OSIRIS O3
• Waiting on OSIRIS NO2 data
• Waiting on comparisons with ACE-FTS data

• Deferred until v11-03
• Also note: GCST plans on migrating benchmark plotting code from IDL to Python in v11-03

• Delivered to GCST (May 2017)

• Ongoing

• Delivered to GCST (Oct 2016)
• Code is ready, but we were waiting for a stable v11-02 release before proceeding
• FlexGrid will facilitate adding new nested-grids or reading new met field products from disk

• ISORROPIA v2.2 code is already present in v11-02, but is deactivated by default.
• It can be activated by setting a single #ifdef switch.

• Work has not yet begun

• To be installed by Bob Yantosca (Harvard), tested by Tailong He (Toronto)
• Work to begin after v11-02 release

• Defer until paper is submitted (Summer 2018)
• Code from v10 (SMVGEAR) needs to be translated to v11 (FlexChem); this may take some effort

• Defer until paper is submitted
• Estimate Fall 2018 or sooner

• Defer until the paper is submitted

• Defer until the paper is submitted

• The script for checking the carbon balance exists and works. Ideally, we would move some of the structures into the KPP files to codify them instead of storing them in the script itself. I currently have the script attached to an Evernote note (linked below). This would be less than 6 months. [https://www.evernote.com/shard/s315/sh/82219b0a-0031-4f3c-a9ca-401964d3b4c5/7af8ad1c743543fa20bf91201ecab2f0

See this link]

• Data has not yet been transferred to GCST

• Data has not yet been transferred to GCST

• Data has not yet been transferred to GCST

• Data has not yet been transferred to GCST

• Emissions are available but need to be formatted properly.
• Could be ready by Fall-Winter 2018, depending on D. Ridley's availability

• Estimate Late 2018 or sooner

• For the sake of the documentation and the wiki I think we should replicate the standard benchmark year on our system, and then switch on the GFAS emissions instead of the GFED and then have the GFAS emissions distributed by hieight. We can do that and then prepare some plots for the documentation. Estimate summer 2018.

• MASAGE data is already available.
• GCST would need assistance from the user community to prepare HEMCO configuration files such that we do not double-count agricultural NH3 from MASAGE and other inventories. This has been the main delay.
• F. Paulot has left the GC community.

• Waiting on data

• Data files delivered to GCST (Jan 2016)
• Needs to be implemented via HEMCO, which is the primary delay

• Code was available in pre v9-02 (HEMCO)
• Code may have been ported to v11-02a but this option was not activated

• Has been added into v9-02 (pre-HEMCO)
• Bringing this up to v11 will probably need significant effort
• BU group/GCST will meet summer 2018 to discuss implementation

• Defer until paper is published
• Estimate Fall 2018

• Data is available, but has not been transferred to GCST yet

• Defer until paper is published
• Estimate Fall 2018

• GCST has implemented many existing SOA diagnostics in netCDF
• GCST would need help from the community to streamline these diagnostics

• Work not started yet. Will need input from the community.

• Rokjin Park says code is ready
• Waiting on clarification in which version this is implemented in.

• Delivered to GCST (Nov 2017)
• Needs to be added as a HEMCO extension, but converting from ancient v9-01-01 code may take significant effort.

• Defer until MEIC paper is published

• "I would say 6-12 months to be safe, but the goal is to have it done by the end of summer 2018. There will actually be very minimal updates to GEOS-Chem; most of the updates are to modify the GISS model to output MERRA2-like data, to facilitate integration with GCHP and future updates to the CTM."

• Rochester and Harvard groups are coordinating, to avoid duplication of effort

• Seb Eastham is now the lead developer.
• Estimate late 2018 or early 2019; validation will take time

• Rebuild the pre-built chemistry mechanisms (Standard, Tropchem, SOA-SVPOA) with Kppa
• Add capability for custom chemistry mechanism by building KPP on-the-fly in GEOS-Chem

• Mike Long, who was the principal proponent behind these updates, has since left the GC community.
• We are not sure who will take this over

• Make high-res concentrations or mass fluxes available offline, implement in met field processing

• Check for overlap with resolution-consistent dust emissions above

• We are not planning on resuming work to unify units in GEOS-Chem anytime soon. Any changes to units in the near future would be for better compatibility with other models, although none are currently planned. However, user consensus on preferred units would still be helpful to move the conversation forward.

• Wait for more interest

• NOTE: Seb Eastham is already working on this

• Ocim-pure physical transport, ECCO-Darwin ocean biogeochemistry