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Remote sensing of tropospheric aerosols from space: from AVHRR to Glory APS

DOI: 10.1615/ICHMT.2007.ConfElectromagLigScat.330
pages 121-124

Michael I. Mishchenko
NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY 10025, U.S.A.

Igor Geogdzhayev
NASA GISS, 2880 Broadway, New York, NY 10025, USA

Brian Cairns
NASA GISS, 2880 Broadway, New York, NY 10025, USA

Jacek Chowdhary
NASA GISS, 2880 Broadway, New York, NY 10025, USA


Analysis of the long-term Global Aerosol Climatology Project dataset reveals a likely decrease of the global optical thickness of tropospheric aerosols by as much as 0.03 during the period 1991-2005. This recent trend mirrors the concurrent global increase in solar radiation fluxes at Earth's surface and may have contributed to recent changes in surface climate. Existing satellite instruments cannot be used to determine unequivocally whether the recent trend is due to long-term global changes in the natural or anthropogenic aerosols. It is thus imperative to provide uninterrupted multidecadal monitoring of aerosols from space with dedicated instruments like the Glory Aerosol Polarimetry Sensor in order to detect long-term anthropogenic trends potentially having a strong impact on climate.

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