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Ozonesonde Observations in the Equatorial Eastern Pacific : The Shoyo-Maru Survey

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タイトル: Ozonesonde Observations in the Equatorial Eastern Pacific : The Shoyo-Maru Survey
著者: SHIOTANI, M 著作を一覧する
Fujiwara, M. 著作を一覧する
Hasebe, F 著作を一覧する
HASHIZUME, H 著作を一覧する
VÖMEL, H 著作を一覧する
OLTMANS, S.J 著作を一覧する
WATANABE, T 著作を一覧する
発行日: 2002年
出版者: 日本気象学会 (Meteorological society of Japan)
誌名: Journal of the Meteorological Society of Japan
巻: 80
号: 4B
開始ページ: 897
終了ページ: 909
出版社 DOI: 10.2151/jmsj.80.897
抄録: We have conducted GPS radiosonde and ozonesonde observations on board the research vessel ‘‘Shoyo-Maru’’ in the equatorial eastern Pacific. These observations took place in September and October 1999 as a part of the Soundings of Ozone and Water in the Equatorial Region (SOWER)/Pacific mission. The mean profile of ozone is similar to that for the dry season (September to October) at San Cristo ́ bal, Gala ́ pagos (0.9 S, 89.6 W ) located in the equatorial eastern Pacific. The mean tropospheric ozone con- centration is about 40 ppbv with a maximum in the mid-troposphere. Compared with the mean profile during the dry season at Watukosek, Indonesia (7.5 S, 112.6 E), this mid-tropospheric maximum is larger, and a sharp increase of ozone below the tropopause begins at a lower altitude for the Shoyo-Maru pro fi le. We frequently observed layers in which ozone and humidity are highly anti-correlated. These layers have vertical scales from several kilometers to several hundred meters. Horizontal scales of these layers are roughly 1000 km, which may correspond to time scales of about 2 days, since the vessel sailed about 500 km/day. These layers are related to northerly winds, which bring in wet and ozone-poor air from the inter-tropical convergence zone situated in the northern side of the main cruise track. Similar layers were observed in ozone pro fi les at San Cristo ́ bal and Watukosek, mostly during the dry season, suggesting the existence of layers advected without vertical mixing.
資料タイプ: article
URI: http://hdl.handle.net/2115/64854
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 藤原 正智

 

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