Evolution of mixing state of black carbon particles: Aircraft measurements over the western Pacific in March 2004

被引:151
作者
Moteki, N.
Kondo, Y.
Miyazaki, Y.
Takegawa, N.
Komazaki, Y.
Kurata, G.
Shirai, T.
Blake, D. R.
Miyakawa, T.
Koike, M.
机构
[1] Univ Tokyo, Adv Sci & Technol Res Ctr, Meguro Ku, Tokyo 1538904, Japan
[2] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA
[3] Univ Tokyo, Dept Earth & Planetary Sci, Tokyo 1138654, Japan
[4] Japan Agcy Marine Earth Sci & Technol, Frontier Res Ctr Global Change, Kanazawa Ku, Kanagawa 2360001, Japan
[5] Kyoto Univ, Dept Technol, Saikyo Ku, Kyoto 6158540, Japan
[6] Natl Inst Environm Studies, Off Atmospher & Ocean Monitoring, Ctr Global Environm Res, Tsukuba, Ibaraki 3058506, Japan
[7] Toyohashi Univ Technol, Dept Ecol Engn, Toyohashi, Aichi, Japan
[8] Japan Aerosp Explorat Agcy, Earth Observ Res & Applicat Ctr, Tsukuba, Ibaraki, Japan
关键词
D O I
10.1029/2006GL028943
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
We report the evolution of the mixing state of black carbon ( BC) particles in urban plumes measured by an airborne single particle soot photometer. The aircraft observations were conducted over the ocean near the coast of Japan in March 2004. The number fraction of coated BC particles with a core diameter of 180 nmincreased from 0.35 to 0.63 within 12 hours ( h), namely 2.3% h(-1), after being emitted from the Nagoya urban area in Japan. BC particles with a core diameter of 250 nm increased at the slower rate of 1.0% h(-1). The increase in coated BC particles was associated with increases in non-sea salt sulfate and water-soluble organic carbon by a factor of approximately two, indicating that these compounds contributed to the coating on the BC particles. These results give direct evidence that BC particles become internally mixed on a time scale of 12 h in urban plumes.
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页数:5
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