GribStream

Global Ensemble Forecast System (GEFS Chem)

GribStream Code: gefschem

Description

GEFS Chem extends the NOAA Global Ensemble Forecast System into atmospheric chemistry and aerosols. Instead of focusing only on temperature, wind, or pressure, it provides fields tied to composition, particle transport, and air-quality risk.

The product is useful when smoke, dust, aerosols, pollutants, visibility, or solar-radiation attenuation matter to an application. Because it belongs to the GEFS family, it can support uncertainty-aware workflows instead of a single deterministic track for chemical transport.

Detail

Parameters

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Click a parameter to reveal variants in a compact table with ready-to-copy JSON selectors.

AOTK –Aerosol Optical Thickness (dimensionless)
6 variants
NOAA GRIB2 Table 4.2-0-3

Aerosol optical thickness represents the column-integrated attenuation of solar radiation by aerosols. Larger values indicate hazier conditions and reduced surface sunlight.

  • Units: dimensionless.
  • Useful for visibility, air quality, and solar energy assessments.
Level Info Horizon Introduced Selector
entire atmosphere aerosol=black carbon dry 0h-120h 2020-10-01
{"name":"AOTK","level":"entire atmosphere","info":"aerosol=black carbon dry"}
entire atmosphere aerosol=dust dry 0h-120h 2020-10-01
{"name":"AOTK","level":"entire atmosphere","info":"aerosol=dust dry"}
entire atmosphere aerosol=particulate organic matter dry 0h-120h 2020-10-01
{"name":"AOTK","level":"entire atmosphere","info":"aerosol=particulate organic matter dry"}
entire atmosphere aerosol=sea salt dry 0h-120h 2020-10-01
{"name":"AOTK","level":"entire atmosphere","info":"aerosol=sea salt dry"}
entire atmosphere aerosol=sulphate dry 0h-120h 2020-10-01
{"name":"AOTK","level":"entire atmosphere","info":"aerosol=sulphate dry"}
entire atmosphere aerosol=total aerosol 0h-120h 2020-10-01
{"name":"AOTK","level":"entire atmosphere","info":"aerosol=total aerosol"}
ASYSFK –Asymmetry Factor (Numeric)
1 variant

Asymmetry Factor (Numeric).

Level Info Horizon Introduced Selector
entire atmosphere aerosol=total aerosol 0h-120h 2020-10-01
{"name":"ASYSFK","level":"entire atmosphere","info":"aerosol=total aerosol"}
COLMD –Column-Integrated Mass Density (kg/m^2)
6 variants
NOAA GRIB2 Table 4.2-0-20

Column-integrated mass density is the total mass per unit area through the vertical column for the specified species. It summarizes column burden and is useful for transport diagnostics.

  • Units: kg/m^2.
Level Info Horizon Introduced Selector
entire atmosphere aerosol=black carbon dry 0h-120h 2020-10-01
{"name":"COLMD","level":"entire atmosphere","info":"aerosol=black carbon dry"}
entire atmosphere aerosol=dust dry 0h-120h 2020-10-01
{"name":"COLMD","level":"entire atmosphere","info":"aerosol=dust dry"}
entire atmosphere aerosol=particulate organic matter dry 0h-120h 2020-10-01
{"name":"COLMD","level":"entire atmosphere","info":"aerosol=particulate organic matter dry"}
entire atmosphere aerosol=sea salt dry 0h-120h 2020-10-01
{"name":"COLMD","level":"entire atmosphere","info":"aerosol=sea salt dry"}
entire atmosphere aerosol=sulphate dry 0h-120h 2020-10-01
{"name":"COLMD","level":"entire atmosphere","info":"aerosol=sulphate dry"}
entire atmosphere aerosol=total aerosol 0h-120h 2020-10-01
{"name":"COLMD","level":"entire atmosphere","info":"aerosol=total aerosol"}
PMTC –Particulate matter (coarse) (10^-6g/m^3)
2 variants

Particulate matter (coarse) (10^-6g/m^3).

Level Info Horizon Introduced Selector
surface aerosol=dust dry 0h-120h 2022-10-18
{"name":"PMTC","level":"surface","info":"aerosol=dust dry"}
surface aerosol=total aerosol 0h-120h 2020-10-01
{"name":"PMTC","level":"surface","info":"aerosol=total aerosol"}
PMTF –Particulate matter (fine) (10^-6g/m^3)
3 variants

Particulate matter (fine) (10^-6g/m^3).

Level Info Horizon Introduced Selector
surface aerosol=dust dry 0h-120h 2020-10-01
{"name":"PMTF","level":"surface","info":"aerosol=dust dry"}
surface aerosol=sea salt dry 0h-120h 2020-10-01
{"name":"PMTF","level":"surface","info":"aerosol=sea salt dry"}
surface aerosol=total aerosol 0h-120h 2020-10-01
{"name":"PMTF","level":"surface","info":"aerosol=total aerosol"}
SCTAOTK –Scattering Aerosol Optical Thickness (Numeric)
6 variants

Scattering Aerosol Optical Thickness (Numeric).

Level Info Horizon Introduced Selector
entire atmosphere aerosol=black carbon dry 0h-120h 2020-10-01
{"name":"SCTAOTK","level":"entire atmosphere","info":"aerosol=black carbon dry"}
entire atmosphere aerosol=dust dry 0h-120h 2020-10-01
{"name":"SCTAOTK","level":"entire atmosphere","info":"aerosol=dust dry"}
entire atmosphere aerosol=particulate organic matter dry 0h-120h 2020-10-01
{"name":"SCTAOTK","level":"entire atmosphere","info":"aerosol=particulate organic matter dry"}
entire atmosphere aerosol=sea salt dry 0h-120h 2020-10-01
{"name":"SCTAOTK","level":"entire atmosphere","info":"aerosol=sea salt dry"}
entire atmosphere aerosol=sulphate dry 0h-120h 2020-10-01
{"name":"SCTAOTK","level":"entire atmosphere","info":"aerosol=sulphate dry"}
entire atmosphere aerosol=total aerosol 0h-120h 2020-10-01
{"name":"SCTAOTK","level":"entire atmosphere","info":"aerosol=total aerosol"}
SSALBK –Single Scattering Albedo (Numeric)
1 variant

Single Scattering Albedo (Numeric).

Level Info Horizon Introduced Selector
entire atmosphere aerosol=total aerosol 0h-120h 2020-10-01
{"name":"SSALBK","level":"entire atmosphere","info":"aerosol=total aerosol"}

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