Premium
Measurements of 7 Be and 210 Pb in cloudwaters: Toward a better understanding of aerosol transport and scavenging
Author(s) -
Su ChihChieh,
Huh ChihAn
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2005gl025042
Subject(s) - scavenging , aerosol , environmental chemistry , chemistry , air mass (solar energy) , ion , altitude (triangle) , atmospheric sciences , environmental science , analytical chemistry (journal) , geology , physics , antioxidant , thermodynamics , biochemistry , geometry , mathematics , organic chemistry , boundary layer
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.