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南极冰架水是由海洋—冰架相互作用形成的位温低于局地冰点的水团,较周围水体相对低温、低盐,是衡量冰架物质平衡的良好指示剂。基于澳大利亚埃默里冰架海洋研究计划(AMISOR)2001至2002年的现场观测资料,本文开展了埃默里冰架水空间分布的季节变化与输运特性研究。CTD结果显示,冰架水夏季普遍分布在冰架前缘的西部、中部和东部海域,但中、西部海域的冰架水核心温度更低、分布范围更广。锚碇潜标结果显示,冰架水的分布存在显著的季节变化:冬季,冰架水盘踞在冰架前缘71.0°E以西海域和71.5-72.5°E的中部海域,以流出为主要特征;夏季,除了冰架前缘71.5-72.5°E的中部海域仍被冰架水控制,冰架水还出现在冰架前缘73.5°E以东海域,并以流入为主要特征。而冰架水在冰架前缘西部海域的出流强度明显大于东部海域的入流强度,全年冰架水主要从冰架底部输出进入普里兹湾占主导。
The Antarctic ice shelf water is a water mass formed by the interaction of the ocean and the ice shelf. The water temperature is lower than the local freezing point. Compared with the surrounding water, Antarctic ice shelf water is relatively low temperature and low salt, which is a good indicator to measure the material balance of the ice shelf. Based on the field observations of AMISOR from 2001 to 2002 in Australia, this paper presents a study on the seasonal variation and transport characteristics of Emory ice shelves. CTD results show that ice shelf water is generally distributed in the western, central and eastern seas in the front of ice shelves in summer, but the core temperature of ice shelves in the central and western seas is lower and has a broader distribution. The results showed that there was a significant seasonal change in the distribution of ice shelf water: in winter, the ice shelf water was entrained in the waters west of 71.0 ° E and the central waters of 71.5-72.5 ° E, In the summer, the central waters 71.5-72.5 ° E except for the front of the ice shelf are still controlled by ice shelf water, which is also present in the seafront to the front of the ice shelf at 73.5 ° E with the influx as the main feature. While the ice shelf water outflow intensity in the western front of the ice shelf was significantly greater than that in the eastern sea area. The annual ice shelf water mainly dominated from the bottom of the ice shelf into the Prydz Bay.