JpGU-AGU Joint Meeting 2017

講演情報

[EE] ポスター発表

セッション記号 A (大気水圏科学) » A-AS 大気科学・気象学・大気環境

[A-AS08] [EE] 雲降水過程の統合的理解に向けて

2017年5月23日(火) 13:45 〜 15:15 ポスター会場 (国際展示場 7ホール)

コンビーナ:鈴木 健太郎(東京大学大気海洋研究所)、高薮 縁(東京大学 大気海洋研究所)、廣田 渚郎(University of Tokyo)、Tomoki Miyakawa(Atmosphere and Ocean Research Institute University of Tokyo)

[AAS08-P19] Investigation of soil moisture - afternoon precipitation coupling in summer over the Tibetan Plateau using satellite observations

*xianhong Meng1Shihua Lyu2Tangtang Zhang1Lan Luan1 (1.NIEER CAS、2.It Univ.)

キーワード:Tibetan Plateau, Soil moisture , afternoon precipitation, Satellite observations

Coupling between soil moisture and afternoon precipitation in summer over the Tibetan Plateau (TP) was investigated using a previously implemented convective triggering potential (CTP)–humidity index (HI) framework by combing satellite observations, including the Atmospheric Infrared Sounder (AIRS), the merged active and passive soil moisture products from the European Space Agency (ESA), and the U.S. Climate Prediction Center (CPC) merged satellite rainfall product (CMORPH). We found that a main atmosphere controlled region was mainly located in the south and the north edge of the TP, and a main negative feedback of soil moisture –afternoon precipitation was in the west of the TP, where the CTP over this region is relatively larger in most time. In the central and the northeast of the TP, both positive and negative feedbacks coexist, with the main positive feedback was shown in the central TP. In addition, the coupling between soil moisture and afternoon precipitation was affected by the statement of monsoon. With the water vapor transport of the monsoon, it is benefit for the co-existence of both positive and negative feedback converting to the positive feedback predominant.