首页|期刊导航|中国海洋湖沼学报（英文版）|Spatial distribution of Ice Shelf Water in front of the Amery Ice Shelf, Antarctica in summer
中国海洋湖沼学报（英文版）2011，Vol.29Issue(6)：1325-1338,14.DOI:10.1007/s00343-011-0318-x
Spatial distribution of Ice Shelf Water in front of the Amery Ice Shelf, Antarctica in summer
Spatial distribution of Ice Shelf Water in front of the Amery Ice Shelf, Antarctica in summer
摘要
Abstract
As a unique low-temperature water mass in Antarctic coastal region,the Ice Shelf Water (ISW) is an important component for the formation of the Antarctic Bottom Water (AABW).In this paper,we present a criterion for ISW identification based on freezing point at the sea surface,and we study spatial distribution of ISW in front of the Amery Ice Shelf (AIS) and its flow path in Prydz Bay by analyzing hydrographic data from Australian cruises in 2001 and 2002,as well as Chinese cruises in 2003,2005,2006,and 2008,all being made in the austral summer.The relatively cold and fresh ISW occurred as several discrete water blocks with cold cores in front of the AIS,within the depth range of 100-600 m,under the seasonal thermocline.ISW had obvious temporal and spatial variations and the spatial distribution pattern changed greatly after 2005.Most of ISW was concentrated west of 73°E during 2001 to 2003 and 2006,but it was widespread to east in 2005 and 2008.In all observation years,a small amount of cold ISW always occurs at the west end of the AIS front section,where the coldest ISW in the whole section also occurred in 2001,2003 and 2006.Considering general cyclonic circulation pattern under the AIS,the ISW flowing out from west end of the AIS front might have experienced the longest cooling period under ice shelf,so it would have the lowest temperature.Analysis of data from meridian sections in Prydz Bay in 2003 implied that ISW in the west could spread north to the continental break along the east flank of the Fram Bank near 70.5°E,mix with the upwelling Circumpolar Deep Water and possibly contribute to the formation of AABW.关键词
Ice Shelf Water/temperature/Amery Ice Shelf/AntarcticaKey words
Ice Shelf Water/temperature/Amery Ice Shelf/Antarctica引用本文复制引用
ZHENG Shaojun,SHI Jiuxin,JIAO Yutian,GE Renfeng..Spatial distribution of Ice Shelf Water in front of the Amery Ice Shelf, Antarctica in summer[J].中国海洋湖沼学报（英文版）,2011,29(6):1325-1338,14.基金项目
Supported by the National Natural Science Foundation of China (No.40676011),the Key Technology Research and Development Program of China (No.2006BAB18B02),and the Specialized Research Fund for the Doctoral Program of Higher Education (No.20100132110016) （No.40676011）
