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Aerosol chemistry during the wet season in central Amazonia - The influence of long-range transportThe temporal variation in the concentration and chemistry of the atmospheric aerosol over central Amazonia, Brazil, during the 1987 wet season is discussed based on ground and aircraft collected data obtained during the NASA GTE ABLE 2B expedition conducted in April/May 1987. It is found that wet-season aerosol concentrations and composition are variable in contrast to the more uniform biogenic aerosol observed during the 1985 dry season; four distinct intervals of enhanced aerosol concentration coincided with short periods (3 to 5 d) of extensive rainfall. It is hypothesized that aerosol chemistry in Amazonia during the wet season is strongly influenced by long-range transport of soil dust, marine aerosol, and possibly biomass combustion products advected into the central Basin by large-scale tropospheric circulation, producing periodic pulses of material input to local boundary layer air. The resultant wet-season aerosol regime is dynamic, in contrast to the uniformity of natural biogenic aerosols during the dry season.
Document ID
19900065066
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Talbot, R. W.
(New Hampshire, University Durham, United States)
Andreae, M. O.
(Max-Planck-Institut fuer Chemie Mainz, Federal Republic of Germany, United States)
Berresheim, H.
(Georgia Institute of Technology Atlanta, United States)
Artaxo, P.
(Sao Paulo, Universidade Brazil)
Garstang, M.
(Virginia, University Charlottesville, United States)
Date Acquired
August 14, 2013
Publication Date
September 20, 1990
Publication Information
Publication: Journal of Geophysical Research
Volume: 95
ISSN: 0148-0227
Subject Category
Meteorology And Climatology
Accession Number
90A52121
Distribution Limits
Public
Copyright
Other

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