Distribution of modified Circumpolar Deep Water and its threat in Vincennes Bay,East Antarctica

作     者：Wenjun YE Lingqiao CHENG Yujiro KITADE Song HU Juncheng ZUO Wenjun YE;Lingqiao CHENG;Yujiro KITADE;Song HU;Juncheng ZUO

作者机构：College of Oceanography and Ecological ScienceShanghai Ocean UniversityShanghai 201306China Key Laboratory of Marine Ecological Monitoring and Restoration TechnologiesMinistry of Natural ResourcesShanghai 201306China Department of Ocean SciencesTokyo University of Marine Science and TechnologyTokyo 108-8477Japan 

出 版 物：《Journal of Oceanology and Limnology》 (海洋湖沼学报（英文）)

年 卷 期：2024年第42卷第5期

页      面：1399-1414页

核心收录：

学科分类：07[理学] 0705[理学-地理学] 070501[理学-自然地理学] 

基　　金：Supported by the National Natural Science Foundation of China(No.42130402) the International Science and Technology Cooperation Key Special Project of the National Key Research and Development Program of China(No.2023YFE0104500) 

主　　题：modified circumpolar deep water evolution of water properties coastal polynya ice shelf Vincennes Bay 

摘      要：The Antarctic Bottom Water formation site Vincennes Bay,East Antarctica is experiencing a substantial intrusion of modified Circumpolar Deep Water(mCDW),which may inhibit the formation of Dense Shelf Water(DSW)and drive basal melting of the ice *** on hydrographic data obtained from March to November in 2012,we evaluated the spatial spread of mCDW over the continental shelf region of Vincennes Bay and the associated temporal evolution of water properties,as well as the sea ice formation effect on water column in the coastal *** show that two branches of mCDW occupied the deep layers of the continental shelf,distinguished by the potential density(smaller than 27.8 kg/m^(3) or not)when potential temperatureθ=0.5°C in theθ-salinity *** warmer and less dense branch observed on the east plateau,accessed the eastern ice shelves in the coastal polynya to drive basal melting of ice *** contrast,the other colder and denser branch in the mid-depression reached the western Underwood Ice *** formation was detectable in the coastal polynya during September-November,proving the occurrence of deep *** heat loss and brine rejection during the intensive sea ice formation contributed to the destratification of the water column in the coastal *** was estimated that at least 1.11±0.79 TW heat carried by mCDW into the inner part of the polynya.