Surface Heating over the Tibetan Plateau associated with the Antarctic Oscillation ...

• Main Authors: Tang, Yuheng, Duan, Anmin, Hu, Jun
• Format: Conference Object
• Language: English
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Amundsen Sea; Antarctic; Indian; The Antarctic; Antarc*
• Online Access: https://dx.doi.org/10.57757/iugg23-3043; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020569

<!--!introduction!--> The surface heating on the Tibetan Plateau (TP) exerts large influence on the Asian summer monsoon. Drivers of TP surface heat include tropical forcings and other climate modes in middle and high latitude of the Northern Hemisphere, however whether the climate modes in Southern Hemisphere influence the TP surface heat is rarely studied. Using multiple source data diagnosis and numerical experiment from an atmospheric general circulation model (AGCM), we found that the Antarctic Oscillation (AAO) in May can efficiently modulate the subsequent surface heat source over the TP in June. When the AAO is in positive phases, a northeastward propagating atmospheric Rossby wave train originates from the Amundsen Sea low. As a part of this wave train, a pair of anomalous cyclone and anticyclone in the Southern Hemisphere accelerates the surface southeasterlies between them, accompanied by cold sea surface temperature (SST) anomaly in the equatorial middle and eastern Indian Ocean induced by ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...