報告人：王顯威(長聘教軌副教授)
時間：2022.10.26 14:00-15:30
騰訊會議：619-388-344
密碼：見郵件或班級通知
報告人簡介
王顯威，博士，上海交通大學海洋近20期六合彩結果
長聘教軌副教授，博士生導師，上海市海外高層次人才引進計劃。他本科畢業于吉林大學測繪工程系，博士畢業于中國科近20期六合彩結果
遙感應用研究所；先后在北京師范大學、俄亥俄州立大學和紐約大學阿布扎比分校開展與極地冰川變化相關的研究。主要研究興趣為遙感在地球科學研究中的應用，尤其關注極地冰川變化及冰川-海洋交互作用。其主要采用光學遙感、雷達遙感和高度計數據探測南極和格陵蘭島典型冰川的三維立體變化，并結合冰川實地測量、海洋觀測數據以及冰川模型等進行冰川-海洋交互作用研究。王顯威副教授分別參加過四次南極和格陵蘭島考察，具有豐富的極地科學考察經驗，在Cryosphere、Remote Sensing of Environment等期刊發表文章23篇。
報告簡介
Global warming and ocean circulation changes have posed substantial threat to Greenland and Antarctic glaciers, which are melting rapidly and have triggered 14 mm sea level rise from 2003 to 2019. Antarctic glaciers are losing ice to the ocean primarily through two processes: iceberg calving and basal melting of ice shelves/tongues. To better predicate future sea level rise, it is urgent to monitor the three-dimensional changes and reveal the calving and basal melting mechanism of Antarctic glaciers. In this presentation, Mertz and Drygalski Ice Tongues are taken as example to study the iceberg calving and how ocean melting ice tongue in East Antarctica. Remote sensing and satellite altimetry were used to detect Mertz Ice Tongue changes before and after calving event. A calving cycle of approximately 70 years caused by seafloor shore, Mertz Bank has been revealed. The glacier-ocean interaction was conducted around Drygalski Ice Tongue. Measurement from Global Positioning System (GPS), Autonomous Phase-sensitive Radio-Echo-Sounder (ApRES), oceanographic mooring and computer modeling were used to study the motion and basal melting of Drygalski Ice Tongue. Rapid basal melting close to the tongue front was detected in austral summer, which was likely triggered by intrusion of Antarctica Surface Water in austral summer. Glacier-ocean interactions, such as glacier calving or basal melting, can be reflected from spaceborne, terrestrial and oceanic observations and are important processes to predict sea level changes. To better understand the driving forces of glacier changes, multi-disciplinary observation and modeling from remote sensing, computer science, glaciology, oceanography and atmosphere science are required.
