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-P16] Does the climate warming hiatus exist over the Tibetan Plateau?

*Anmin Duan1 (1.Institute of Atmospheric Physics, Chinese Academy of Sciences)

キーワード:Tibetan Plateau, warming amplification , cloud-radiation feedback

The surface air temperature change over the Tibetan Plateau has been determined based on historical observations from 1980 to 2013. In contrast to the cooling trend in the rest of China, and the global warming hiatus post-1990s, an accelerated warming trend has appeared over the Tibetan Plateau during 1998–2013 (0.25 °C decade−1) compared with that during 1980–1997 (0.21 °C decade−1). Further results indicate that such an accelerated warming trend might be attributed to the cloud-radiation feedback, to some degree. The increased nocturnal cloud over the northern Tibetan Plateau will warm the nighttime temperature by the enhancement of atmosphere counterradiation, while the decreased daytime cloud over the southern Tibetan Plateau will induce the daytime sunshine duration increased, resulting surface air temperature warming. Meanwhile, the in situ surface wind speed has recovered gradually since 1998, and the energy concentration cannot explain the accelerated warming trend. It is suggested that the cloud–radiation feedback may play an important role in modulating the accelerated warming trend over the Tibetan Plateau.