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The CAMS Global Fire Assimilation System (GFAS) assimilates fire radiative power (FRP) observations from satellite-based sensors to produce estimates of biomass burning emissions. FRP observations currently assimilated in CAMS GFAS are MODIS and VIIRS active fire products (https://ladsweb.modaps.eosdis.nasa.gov/). The rate of release of thermal radiation by a fire is directly related to the rate at which fuel is being consumed and smoke produced. Therefore, these FRP data are used (after screening for spurious signal) in the global estimation of open vegetation fire trace gas and particulate emissions. GFAS includes also information about injection heights derived from the same FRP observations combined with meteorological information from the ECMWF operational weather forecast.
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This page provides the documentation for GFAS v1.4.2.
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CAMS GFAS fire data is based on satellite observations of thermal anomalies at the surface which are most commonly associated with vegetation fires, however, detections from other heat sources (such as active volcanos and gas flaring) and reflective surfaces may also be possible. GFAS tries to minimise these spurious detections to ensure that the data is largely based on vegetation fires. Satellite observations may be limited by smaller fires being below the detection threshold of the instruments or in the presence of cloud when the instruments are not able to observe the surface. |
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