首页 | 本学科首页   官方微博 | 高级检索  
     检索      


The role of barrier layer in southeastern Arabian Sea during the development of positive Indian Ocean Dipole events
Authors:Feiyan Guo  Qinyu Liu  Xiao-Tong Zheng  Shan Sun
Institution:12170. Physical Oceanography Laboratory and Key Laboratory of Ocean-Atmosphere Interaction and Climate in Universities of Shandong, Ocean University of China, Qingdao, 266100, P. R. China
22170. NOAA Earth System Research Laboratory, 325 Broadway, Boulder, Colorado, 80305, USA
Abstract:Using data from Argo and simple ocean data assimilation (SODA), the role of the barrier layer (BL) in the southeastern Arabian Sea (SEAS: 60°E–75°E, 0°–10°N) is investigated during the development of positive Indian Ocean Dipole (IOD) events from 1960 to 2008. It is found that warmer sea surface temperature (SST) in the northern Indian Ocean appears in June in the SEAS. This warm SST accompanying anomalous southeastern wind persists for six months and a thicker BL and a corresponding thinner mixed layer in the SEAS contribute to the SST warming during the IOD formation period. The excessive precipitation during this period helps to form a thicker BL and a thinner mixed layer, resulting in a higher SST in the SEAS. Warm SST in the SEAS and cold SST to the southeast of the SEAS intensify the southeasterly anomaly in the tropical Indian Ocean, which transports more moisture to the SEAS, and then induces more precipitation there. The ocean-atmosphere interaction process among wind, precipitation, BL and SST is very important for the anomalous warming in the SEAS during the development of positive IOD events.
Keywords:sea surface temperature (SST)  mixed layer  barrier layer  Indian Ocean Dipole (IOD)  persistence  precipitation  southeastern Arabian Sea
本文献已被 维普 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号