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タイトル: Enhanced Mid-latitude Tropospheric Column Ozone over East Asia: Coupled Effects of Stratospheric Ozone Intrusion and Anthropogenic Sources
著者: Nakatani, Aya; Kondo, Sayako; Hayashida, Sachiko link image; Nagashima, Tatsuya; Sudo, Kengo; Liu, Xuiong; Chance, Kelly; Hirota, Isamu
著者(別表記) : 中谷, 彩; 近藤, 沙綾子; 林田, 佐智子; 永島, 達也; 須藤, 健悟; 廣田, 勇
著者読み: なかたに, あや; こんどう, さやこ; はやしだ, さちこ; ながしま, たつや; すどう, けんご; ひろた, いさむ
発行日: 2012年 2月
出版者: Meteorological Society of Japan : 日本気象学会
引用: A. Nankatani, S. Kondo, S. Hayashida, T. Nagashima, K. Sudo, X. Liu, K. Chance, I. Hirota: Journal of the Meteorological Society of Japan. Ser. II, Vol. 90 (2012), No. 2, pp. 207-222
抄録: We analyze tropospheric column ozone (TCO) data observed by satellite instruments over East Asia for 15 years (from 1995 to 2009), and investigate the relationship between enhanced TCO (E-TCO) and ozone intrusion from the stratosphere near the subtropical jet (STJ). A belt of E-TCO is observed at mid-latitude over East Asia throughout the year; the belt is located at latitudes approximately equal to that of the STJ on seasonal, monthly, and daily timescales. The observed results are compared with a tagged tracer simulation by using a global chemical transport model. The simulation for East Asia indicates that the contribution from tropospheric origin to the enhancement of TCO is comparable to that from stratospheric origin at latitudes close to the STJ, resulting in the high correlation of the E-TCO belt and the STJ. The two origins of ozone cannot be differentiated in the tropospheric column ozone observed by a satellite, especially over East Asia where the anthropogenic source regions of ozone precursors are situated close to the latitudes of the STJ. Some occasional data, however, indicate split origins on a daily timescale, suggesting that the two origins really contribute to the enhancement of TCO. Our results strongly suggests an urgent need to develop a new satellite sensor and/or a new algorithm to distinguish boundary layer ozone from free tropospheric ozone in order to promote our understanding of atmospheric pollution over East Asia.
記述: Copyright © 2012 by Meteorological Society of Japan
???metadata.dc.relation.doi???: 10.2151/jmsj.2012-204
URI: http://hdl.handle.net/10935/4298
ISSN: 00261165
出現コレクション:雑誌

このアイテムの引用には次の識別子を使用してください: http://hdl.handle.net/10935/4298

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