Measurements of 7Be and 210Pb in cloudwaters: Toward a better understanding of aerosol transport and scavenging
Resource
GEOPHYSICAL RESEARCH LETTERS 33: L04807
Journal
Geophysical Research Letters
Journal Volume
33
Journal Issue
4
Date Issued
2006
Author(s)
Abstract
This paper presents the first results of 7 Be and 210 Pb specific activities in cloudwater and investigates their respective differences in cloudwater and rainwater. Our data and analysis show that temporal variation of the 7 Be/ 210 Pb activity ratio in cloudwater are caused by multiple sources of air masses, with increased 7 Be/ 210 Pb activity ratios corresponding to the advent of maritime or high‐altitude air masses. The measured specific activities of 7 Be and 210 Pb in cloudwater samples span three orders of magnitude and correlate strongly with the acidity of the samples. From this correlation and the observation that specific activities of 7 Be and 210 Pb are higher in the more acidic cloudwater, we suggest that 7 Be and 210 Pb in aerosol particles can be desorbed by H + ions.
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Type
journal article
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