Major Saharan dust storm of March 2006: Microphysical, optical and radiative properties determined from combined surface and satellite data

Details Major Saharan dust storm of March 2006: Microphysical, optical and radiative properties determined from combined surface and satellite data Major Saharan dust storm of March 2006: Microphysical, optical and radiative properties determined from combined surface and satellite data

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.a32c..06k&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #A32C-06

Physics

0305 Aerosols And Particles (0345, 4801, 4906), 3359 Radiative Processes, 3360 Remote Sensing

Scientific paper

One of the key uncertainties in the Earth's radiation balance is the effect of dust on radiative fluxes (radiative forcing), which in turn affects climate processes on planetary and local scales. Both the sign (cooling versus heating) and magnitude of the dust radiative forcing have proven difficult to determine due to incomplete knowledge of aerosol microphysical and optical properties and their strong temporal and spatial variations. Here we present microphysical, optical and radiative properties of dust determined from collocated and coincident observations from space and surface during the major Saharan dust storm in Niamey, Niger on March 2006. This storm has been clearly identified by the Geostationary Earth Radiation Budget (GERB) and Spinning Enhanced Visible and Infrared Imager (SEVIRI) instruments flown onboard the Meteosat-8 geostationary platform and the Atmospheric Radiation Measurement (ARM) Mobile Facility (AMF) ground-based measurements. The latter include measurements by Multi-filter Rotating Shadowband Radiometer, Atmospheric Emitted Radiance Interferometer, Micropulse Lidar, and Aerosol Observing System. We use this integrated dataset to i) measure the dust optical properties, ii) tentatively identify the dust composition ii) measure the total atmospheric radiation convergence, and iv) compute the radiative heating profile and radiation convergence for this major event (visible optical depth greater than 3).

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