Simulated Impacts of the Wetter Arid Area of Northwestern China on Energy Budget and Atmospheric Circulation Over Tibetan Plateau and Central Part of North China Plain in Summer

作     者：Ma, Di Meng, Xianhong Lv, Shihua Li, Yaohui Yu, Haipeng Shu, Lele Zhao, Lin Li, Zhaoguo 

作者机构：College of Atmospheric Sciences Lanzhou University Gansu Province Lanzhou730000 China Key Laboratory for Land Surface Process and Climate Change in Cold and Arid regions Northwest Institute of Eco-Environment and Resources Chinese Academy of Science Gansu Province Lanzhou730000 China School of Atmospheric Sciences Plateau Atmosphere and Environment Key Laboratory of Sichuan Province Chengdu University of Information Technology Sichuan Province Chengdu610225 China Civil aviation flight University of China Sichuan Province Guanghan618307 China 

出 版 物：《SSRN》 

年 卷 期：2022年

核心收录：

主　　题：Soil moisture 

摘      要：This paper examines the local and non-local climatic effects of wetter arid areas of Northwestern China (ANWC) in summer using a fully coupled climate model. In response to soil moisture increase, the local air temperature significantly decreases, and precipitation increases in summer. Also, the wetter ANWC can result in a warmer and rainless climate over the Central part of North China Plain (CNCP). A cooler climate leads to an abnormal descending motion occurring over ANWC. Meanwhile, an anomalous high pressure and an abnormal anticyclonic circulation in 500hpa over the west of ANWC. A Rossby wave is stimulated and propagates downstream. Correspondingly, a huge anomalous cyclone circulation occurs over the northeastern part of China and Mongolia. This huge anomalous cyclone circulation can block the East Asian summer Monsoon northward and decrease the water vapor transport into Central China Plain. So, the weakened East Asian summer Monsoon leads to rainless over CNCP. Moreover, the influence of increasing soil moisture on the Tibet Plateau (TP) precipitation is negligible due to the high altitude. In addition, the impacts of different wetting magnitudes of ANWC are also discussed. As soil moisture increases over ANWC is stronger, the magnitudes of the atmospheric field become significantly larger. This study highlights the wetter ANWC effect on local climate and provides more information about the mechanism of wetter ANWC remote effect on non-local climate. © 2022, The Authors. All rights reserved.