GEOS-5 Configuration for ARCTAS: Difference between revisions

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* Additional tracers:
* Additional tracers:
** 2 ''Hyfrophobic'' Black Carbon tags driven by
** 2 ''Hydrophobic'' Black Carbon tag tracers driven by
*** Western hemisphere biomass burning  
*** Western hemisphere biomass burning  
*** Eastern hemisphere biomass burning  
*** Eastern hemisphere biomass burning  
** 5 CO tags driven by
** 5 CO tag tracers driven by
*** Western boreal biomass burning
*** Western boreal biomass burning
*** Eastern boreal biomass burning
*** Eastern boreal biomass burning
*** non-biomass emissions: North America, Europe and Asia
*** non-biomass emissions: North America, Europe and Asia
** 2 CH3CN tags driven by
** 2 CH3CN tag tracers driven by
*** Western boreal biomass burning
*** Western boreal biomass burning
*** Eastern boreal biomass burning
*** Eastern boreal biomass burning
Line 38: Line 38:
*** Tropospheric origin
*** Tropospheric origin
*** Stratospheric origin
*** Stratospheric origin
* The [[GEOS-5 File Specification Addendum for ARCTAS]] documents describes the additional data products being generated
* A real-time data delivery system consisting of
** OPeNDAP server
** Anonymous FTP
** Web Map Server (WMS) with GoogleEarth capabilities (TBD)
* On-line visualization system tailored for ARCTAS
** Web-based visualization of ''Chemical Weather''
** WMS viewer


The bounding boxes for each of the regions above are given below:
The bounding boxes for each of the regions above are given below:
<center>
{| border="1"
|+ ''Table 1.'' Regions for defining tag tracers
!  Region !! Longitude Range !! Latitude Range !! Remarks
|-
| Western Hemisphere || [180W,0] || [-90,90] ||
|-
| Eastern Hemisphere || [0,180E] || [-90,90] ||
|-
| Asia              ||    TBD  ||    TBD  ||
|-
| Europe            ||    TBD  ||    TBD  ||
|-
| North America      ||    TBD  ||    TBD  ||
|-
| Troposhere        ||  all  ||  all    || based on GEOS-5 diagnosed tropopause
|-
| Stratosphere      ||  all  ||  all    || based on GEOS-5 diagnosed tropopause
|-
|}
<center>
{| border="1"
|+ ''Table 1.'' List of GEOS-5 Export State variables sorted by SHORT variable name
!  Name !! Component !! Units !! Dim  !! Long Name
|-
| ACCUM || Catch || kg m-2 s-1 || tile || Net ice accumulation rate
|-
| ACRIL_AN || Moist || s-1 || xyz  || Ice liq accretion of anvil precipitation
|-
| ACRIL_AN || Moist || s-1 || xyz  || Ice liq accretion of anvil precipitation
|-
</center>

Revision as of 14:27, 16 November 2007

The Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS will take place during the Spring and Summer of 2008. This is a working document defining the main attributes of the GEOS-5 system that will be deployed in real-time in support of ARCTAS.

The Baseline System

The starting point is the GEOS-5 Atmospheric Data Assimilation System (GEOS-5 ADAS) used for the Modern Era Retrospective-analysis for Research and Applications (MERRA), consisting of the main subsystems:

  • GEOS-5 Atmospheric Global Climate Model (GEOS-AGCM)
  • The Gridpoint Statistical Interpolation (GSI) analysis system, jointly developed by NOAA/NCEP and GMAO

This system will be complemented by the GEOS-5 Aerosol/Chemistry (AeroChem) components that were used in support of TC4 (Tropical Composition, Cloud and Climate Coupling) Mission, including

  • Global CO and CO2 tracers
  • GOCART aerosols:
    • Dust: 5 bins
    • Sea-salt: 5 bins
    • Organic carbon: hydrophobic and hydrophilic tracers
    • Black carbon: hydrophobic and hydrophilic tracers
    • Sulfates: SO2, SO4, Dimethylsulphide (DMS) and Methanesulphonic acid (MSA)

Advection, diffusion, and convective transport of the above tracers are performed on-line within the GEOS-5 AGCM.

GEOS-5 Customization for ARCTAS

The baseline GEOS-5 system will include the following new features in support of ARCTAS:

  • Additional tracers:
    • 2 Hydrophobic Black Carbon tag tracers driven by
      • Western hemisphere biomass burning
      • Eastern hemisphere biomass burning
    • 5 CO tag tracers driven by
      • Western boreal biomass burning
      • Eastern boreal biomass burning
      • non-biomass emissions: North America, Europe and Asia
    • 2 CH3CN tag tracers driven by
      • Western boreal biomass burning
      • Eastern boreal biomass burning
    • 2 CFC F12 tracers tagged according to
      • Tropospheric origin
      • Stratospheric origin
  • The GEOS-5 File Specification Addendum for ARCTAS documents describes the additional data products being generated
  • A real-time data delivery system consisting of
    • OPeNDAP server
    • Anonymous FTP
    • Web Map Server (WMS) with GoogleEarth capabilities (TBD)
  • On-line visualization system tailored for ARCTAS
    • Web-based visualization of Chemical Weather
    • WMS viewer


The bounding boxes for each of the regions above are given below:

Table 1. Regions for defining tag tracers
Region Longitude Range Latitude Range Remarks
Western Hemisphere [180W,0] [-90,90]
Eastern Hemisphere [0,180E] [-90,90]
Asia TBD TBD
Europe TBD TBD
North America TBD TBD
Troposhere all all based on GEOS-5 diagnosed tropopause
Stratosphere all all based on GEOS-5 diagnosed tropopause
Table 1. List of GEOS-5 Export State variables sorted by SHORT variable name
Name Component Units Dim Long Name
ACCUM Catch kg m-2 s-1 tile Net ice accumulation rate
ACRIL_AN Moist s-1 xyz Ice liq accretion of anvil precipitation
ACRIL_AN Moist s-1 xyz Ice liq accretion of anvil precipitation
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