Climatology of Aerosol Optical Depth over the United States

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http://hdl.handle.net/11603/33554

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UMBC GESTAR II
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Author/Creator ORCID

https://orcid.org/0000-0001-9801-1610

Date

2002-06-03

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conference papers and proceedings
preprints
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract

Aerosol climatologies based on consistent and high quality sources of information over extended areas are not available. Yet, such information is needed for estimating their radiative effects, for correctly computing surface radiative fluxes by methods of remote sensing, as inputs to climate models, as well as for the evaluation of satellite based estimates of this parameter. To respond to such needs, several attempts have been made to obtain aerosol climatologies, based on inventories of sources and by applying transport models to distribute the emitted particulates in space. Recently, consistent observations from numerous locations are becoming available from the Aerosol Robotic Network (AERONET) network. This network is most dense over the United States. The observations are not evenly distributed, and not of sufficient density. However, they are extremely valuable since they represent true values at the sites where they are observed. In this paper, an effort has been made to develop aerosol climatology over the United States, at a monthly time scale, by combining ground observations and transport model estimates, using objective analysis methods.