Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/6326
Title: | Characterization of airborne carbonate over a site near Asian dust source regions during spring 2002 and its climatic and environmental significance | Authors: | Cao, JJ Lee, SC Zhang, XY Chow, JC An, ZS Ho, KF Watson, JG Fung, K Wang, YQ Shen, ZX |
Issue Date: | Feb-2005 | Source: | Journal of geophysical research. Atmospheres, Feb. 2005, v. 110, no. D3, D03203 | Abstract: | During spring 2002, three dust storm events were monitored by filter sampling in Xi'an near an Asian dust source region of northwest China. The carbonate (CO [sup 2-] [sub 3]) fraction was determined by sample acidification and thermal evolution. The CO [sup 2-] [sub 3] accounted for 8.0 ± 0.8% of particles with aerodynamic diameter ≤2.5 μm (PM₂.₅) during dust storms and 4.7 ± 3.0% of PM₂.₅ between storms. The ratios of calcium to carbonate carbon were consistent with those of calcite (CaCO₃). The δ¹³C and δ18O abundances in dust storm samples were −2.7 ± 0.7‰ and −5.8 ± 1.5‰, which differed from −8.3 ± 1.9‰ for δ13C and −10.8 ± 2.0‰ for δ¹⁸ O during normal conditions. The δ¹³C is positively correlated with δ¹⁸ O values (r = 0.78). This first measurement of isotopic abundance in Asian dust indicates the potential to quantify its contribution at distant locations using receptor models. By increasing the alkalinity of ocean water in the Pacific Ocean and buffering the atmospheric acidity of east Asia, the large amounts of airborne CO[sup 2-] [sub 3] (as high as 44.8 Tg yr⁻¹) entrained by Asian dust may provide an important atmospheric alkaline carbon reservoir for large-scale climatic and environmental changes. (See Article file for details of the abstract.) | Keywords: | Dust storm Carbonate Carbon isotope Asian dust Atmospheric carbon Receptor model |
Publisher: | Wiley-Blackwell | Journal: | Journal of geophysical research. Atmospheres | ISSN: | 2169-897X | EISSN: | 2169-8996 | DOI: | 10.1029/2004JD005244 | Rights: | Copyright 2005 by the American Geophysical Union. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Cao_characterization_airborne_carbonate.pdf | 270.49 kB | Adobe PDF | View/Open |
Page views
153
Last Week
1
1
Last month
Citations as of Apr 28, 2024
Downloads
272
Citations as of Apr 28, 2024
SCOPUSTM
Citations
136
Last Week
2
2
Last month
0
0
Citations as of Apr 26, 2024
WEB OF SCIENCETM
Citations
120
Last Week
0
0
Last month
0
0
Citations as of May 2, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.