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Van Dingenen, Rita; Virkkula, Aki O.; Raes, Frank; Bates, Timothy S.; Wiedensohler, Alfred (2011)
Publisher: Tellus B
Journal: Tellus B
Languages: English
Types: Article
Subjects:
We propose an analytical expression for the relation between aerosol accumulation number and sub-micron volume over the marine boundary layer (MBL), based on a simple balance equation. By providing appropriate source and sink terms which account for entrainment, coagulation, in-cloud scavenging and condensational growth, the model is able to reproduce the observed ratio between MBL particles larger than 80 nm diameter (as a proxy for accumulation mode number) and submicron aerosol volume, from freshly polluted to background conditions. Entrainment and coagulation are essential in predicting the observed ratio. Budget and lifetime calculations show that, due to relatively low source rates of oceanic non-sea-salt-sulfate and sea-salt, the anthropogenic signature in aerosol volume remains significant even after 8 days of MBL transport.DOI: 10.1034/j.1600-0889.2000.00091.x
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