Study on the dehydration in the Tropical Tropopause Layer by observations of minor constituents and analyses of 4-D assimilation field

热带对流层顶层脱水的微量成分观测和4维同化场分析研究

• 批准号: 21244072
• 负责人: HASEBE Fumio
• 金额: $ 29.04万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21244072/
• 关键词: 地球環境システム; 成層圏組成変動; 熱帯対流圏界層; 脱水過程; ゾンデ観測; 過飽和度; 同化場解析; 気象学; 地球環境; 水蒸気; データ同化; 大気大循環; 成層圏; 対流圏界層; 地球観測

The long-term trend of the water concentration in the tropical stratosphere has been estimated from in situ observations by radiosondes.Supersaturations close to 80 % in relative humidity with respect to ice have been observed in cirrus clouds advected horizontally in the Tropical Tropopause Layer (TTL). General features of dehydration associated with horizontal advection for the air parcels slowly ascending in the TTL have been observationally described for the first time by investigating the water mixing ratio of the observed air parcels and their minimum saturation mixing ratio estimated along the trajectories upstream.

本文利用无线电探空仪的现场观测资料，估计了热带平流层中水分浓度的长期变化趋势，在热带对流层顶水平平流卷云中观测到相对湿度接近80%的冰的超饱和现象。本文首次通过对TTL中缓慢上升的气团的水混合比和沿沿着上游轨迹的最小饱和混合比的观测研究，描述了TTL中缓慢上升的气团水平平流脱水的一般特征。

项目成果

Ozone variations over the northern subtropical region revealed by ozonesonde observations in Hanoi

• DOI: 10.1002/jgrd.50348
• 发表时间: 2013-04
• 期刊: Journal of Geophysical Research: Atmospheres
• 作者: S. Ogino;M. Fujiwara;M. Shiotani;F. Hasebe;Jun Matsumoto;Thuy Ha T Hoang;Tan Thanh T Nguyen

SOWER (Soundings of Ozone and Water in the Equatorial Region) : Intraseasonal to interannual variations of ozone over the Northern subtropical region revealed by ozonesonde observations in Hanoi, Vietnam

SOWER（赤道地区臭氧和水的探测）：越南河内臭氧探空仪观测揭示的北亚热带地区臭氧的季节内和年际变化

• 发表时间: 2011
• 作者: Ogino;Shin-Ya;Masatomo Fujiwara,Masato Shiotani;Fumio Hasebe;Jun Matsumoto;Hoang T Ha;Nguyen T Tan Thanh
• 通讯作者: Nguyen T Tan Thanh

熱帯対流圏界面を通した物質交換

通过热带对流层顶的物质交换

• 发表时间: 2010
• 作者: M. Kikuchi;K. Nagao;K. Bajo and H. Hidaka;幾田泰酵;長谷部文雄
• 通讯作者: 長谷部文雄

熱帯対流圏界面付近における東西非一様な温度構造の特性について

热带对流层顶附近东西向温度结构不均匀特征

• 发表时间: 2010
• 作者: 西本絵梨子;塩谷雅人
• 通讯作者: 塩谷雅人

SOWER/Pacific

播种/太平洋