The Processes-Based Attributes of Four Major Surface Melting Events over the Antarctic Ross Ice Shelf  

作　　者：Wenyi LI Yuting WU Xiaoming HU 

机构地区：[1]School of Atmospheric Sciences,Sun Yat-sen University and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519000,China [2]Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China [3]Chongqing Research Institute of Big Data,Peking University,Chongqing 401333,China [4]Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies,Sun Yat-sen University,Zhuhai 519000,China

出　　处：《Advances in Atmospheric Sciences》2023年第9期1662-1670,共9页大气科学进展（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 42075028 and 42222502);the Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) (Grant SML2021SP302)

摘　　要：The Ross-Amundsen sector is experiencing an accelerating warming trend and a more intensive advective influx of marine air streams.As a result,massive surface melting events of the ice shelf are occurring more frequently,which puts the West Antarctica Ice Sheet at greater risk of degradation.This study shows the connection between surface melting and the prominent intrusion of warm and humid air flows from lower latitudes.By applying the Climate Feedback-Response Analysis Method(CFRAM),the temporal surge of the downward longwave(LW)fluxes over the surface of the Ross Ice Shelf(RIS)and adjacent regions are identified for four historically massive RIS surface melting events.The melting events are decomposed to identify which physical mechanisms are the main contributors.We found that intrusions of warm and humid airflow from lower latitudes are conducive to warm air temperature and water vapor anomalies,as well as cloud development.These changes exert a combined impact on the abnormal enhancement of the downward LW surface radiative fluxes,significantly contributing to surface warming and the resultant massive melting of ice.

关 键 词：Ross Ice Shelf(RIS) surface melting warm and humid air advection downward longwave radiation Climate Feedback-Response Analysis Method(CFRAM) 

分 类 号：P941.61[天文地球—自然地理学] P343.6