SCAR‐B fires in the tropics: Properties and remote sensing from EOS‐MODIS
- 27 December 1998
- journal article
- Published by American Geophysical Union (AGU) in Journal of Geophysical Research: Atmospheres
- Vol. 103 (D24) , 31955-31968
- https://doi.org/10.1029/98jd02460
Abstract
Two moderate resolution imaging spectroradiometer (MODIS) instruments are planned for launch in 1999 and 2000 on the NASA Earth Observing System (EOS) AM‐1 and EOS PM‐1 satellites. The MODIS instrument will sense fires with designated 3.9 and 11 μm channels that saturate at high temperatures (450 and 400 K, respectively). MODIS data will be used to detect fires, to estimate the rate of emission of radiative energy from the fire, and to estimate the fraction of biomass burned in the smoldering phase. The rate of emission of radiative energy is a measure of the rate of combustion of biomass in the fires. In the Smoke, Clouds, and Radiation‐Brazil (SCAR‐B) experiment the NASA ER‐2 aircraft flew the MODIS airborne simulator (MAS) to measure the fire thermal and mid‐IR signature with a 50 m spatial resolution. These data are used to observe the thermal properties and sizes of fires in the cerrado grassland and Amazon forests of Brazil and to simulate the performance of the MODIS 1 km resolution fire observations. Although some fires saturated the MAS 3.9 μm channel, all the fires were well within the MODIS instrument saturation levels. Analysis of MAS data over different ecosystems, shows that the fire size varied from single MAS pixels (50×50 m) to over 1 km2. The 1×1 km resolution MODIS instrument can observe only 30–40% of these fires, but the observed fires are responsible for 80 to nearly 100% of the emitted radiative energy and therefore for 80 to 100% of the rate of biomass burning in the region. The rate of emission of radiative energy from the fires correlated very well with the formation of fire burn scars (correlation coefficient = 0.97). This new remotely sensed quantity should be useful in regional estimates of biomass consumption.Keywords
This publication has 13 references indexed in Scilit:
- Potential global fire monitoring from EOS‐MODISJournal of Geophysical Research: Atmospheres, 1998
- Discriminating heavy aerosol, clouds, and fires during SCAR‐B: Application of airborne multispectral MAS dataJournal of Geophysical Research: Atmospheres, 1998
- Effect of fuel composition on combustion efficiency and emission factors for African savanna ecosystemsJournal of Geophysical Research: Atmospheres, 1996
- Satellite remote sensing of fires during the SAFARI campaign using NOAA Advanced Very High Resolution Radiometer dataJournal of Geophysical Research: Atmospheres, 1996
- Spatial and temporal distribution of tropical biomass burningGlobal Biogeochemical Cycles, 1994
- Smoke and fire characteristics for cerrado and deforestation burns in Brazil: BASE‐B ExperimentJournal of Geophysical Research: Atmospheres, 1992
- Smoke emissions from wildland firesEnvironment International, 1991
- Biomass Burning in the Tropics: Impact on Atmospheric Chemistry and Biogeochemical CyclesScience, 1990
- A method for satellite identification of surface temperature fields of subpixel resolutionRemote Sensing of Environment, 1981
- Biomass burning as a source of atmospheric gases CO, H2, N2O, NO, CH3Cl and COSNature, 1979