Radiative impacts from biomass burning in the presence of clouds during boreal spring in southeast Asia

Details Radiative impacts from biomass burning in the presence of clouds during boreal spring in southeast Asia Radiative impacts from biomass burning in the presence of clouds during boreal spring in southeast Asia

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30e..28h&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 5, pp. 28-1, CiteID 1224, DOI 10.1029/2002GL016485

Physics

15

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Atmospheric Composition And Structure: Cloud Physics And Chemistry, Atmospheric Composition And Structure: Pollution-Urban And Regional (0305), Atmospheric Composition And Structure: Transmission And Scattering Of Radiation, Global Change: Atmosphere (0315, 0325)

Scientific paper

The impact of smoke aerosols generated from biomass burning activities in Southeast Asia on the total (i.e., direct and indirect effects) reflected solar and emitted thermal radiation from clouds was investigated using satellite data. We combine narrowband radiance measurements, from ultraviolet to near-infrared wavelengths (e.g., SeaWiFS and TOMS), with broadband irradiance measurements (e.g., CERES) to quantify how smoke aerosols modulate the cloud radiative forcing. In Southeast Asia, our results reveal that smoke is frequently present over large areas of cloud-covered regions during boreal spring. The reflected solar (emitted thermal) radiation from clouds due to smoke aerosols can be reduced (enhanced) by as much as 100 (20) W m-2 over the month of March 2000. We also found that the reduction in cloud spectral reflectance at 670 nm is large enough to lead to significant errors in retrieving cloud properties (e.g., optical thickness and effective radius) from current satellite measurements, such as AVHRR and MODIS.

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