2001-2002年间南极埃默里冰架水的空间分布与季节变化
发布时间：2018-10-31 21:31
【摘要】：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。
[Abstract]:Antarctic ice shelf water is a water mass formed by ocean-ice shelf interaction with a potential temperature lower than the local freezing point. It is relatively low temperature and low salt than the surrounding water body. It is a good indicator of the ice shelf material balance. Based on the field observation data of (AMISOR) from 2001 to 2002 under the Emory Ice Shelf Ocean Research Project, Australia, the seasonal variation and transport characteristics of the water distribution in the Emory Ice Shelf are studied in this paper. CTD results show that, Ice shelf water is widely distributed in the western, central and eastern waters of the ice shelf in summer, but the core temperature of the ice shelf water in the western sea is lower and the distribution range is wider. The results show that the distribution of ice shelf water has obvious seasonal variation: in winter, ice shelf water is located in the sea area west of 71.0 掳E and in the middle of 71.5-72.5 掳E, with outflow as the main feature. In summer, in addition to the central sea area of 71.5-72.5 掳E, which is still controlled by ice shelf water, ice shelf water also appears in the sea area east of 73.5 掳E, and the main feature is inflow. The outflow intensity of ice shelf water in the western sea area of the ice shelf is obviously higher than that in the eastern sea area, and the ice shelf water is mainly exported from the bottom of the ice shelf to Prydz Bay in the whole year.
【作者单位】： 上海海洋大学海洋科学学院;上海海洋大学大洋渔业资源可持续利用省部共建教育部重点实验室;
【基金】：南北极环境调查及评估专项(CHINARE2014-01-01) 国家自然科学基金(41506219) 上海市浦江人才计划(15PJ403000)
【分类号】：P731.16
本文编号：2303626
[Abstract]:Antarctic ice shelf water is a water mass formed by ocean-ice shelf interaction with a potential temperature lower than the local freezing point. It is relatively low temperature and low salt than the surrounding water body. It is a good indicator of the ice shelf material balance. Based on the field observation data of (AMISOR) from 2001 to 2002 under the Emory Ice Shelf Ocean Research Project, Australia, the seasonal variation and transport characteristics of the water distribution in the Emory Ice Shelf are studied in this paper. CTD results show that, Ice shelf water is widely distributed in the western, central and eastern waters of the ice shelf in summer, but the core temperature of the ice shelf water in the western sea is lower and the distribution range is wider. The results show that the distribution of ice shelf water has obvious seasonal variation: in winter, ice shelf water is located in the sea area west of 71.0 掳E and in the middle of 71.5-72.5 掳E, with outflow as the main feature. In summer, in addition to the central sea area of 71.5-72.5 掳E, which is still controlled by ice shelf water, ice shelf water also appears in the sea area east of 73.5 掳E, and the main feature is inflow. The outflow intensity of ice shelf water in the western sea area of the ice shelf is obviously higher than that in the eastern sea area, and the ice shelf water is mainly exported from the bottom of the ice shelf to Prydz Bay in the whole year.
【作者单位】： 上海海洋大学海洋科学学院;上海海洋大学大洋渔业资源可持续利用省部共建教育部重点实验室;
【基金】：南北极环境调查及评估专项(CHINARE2014-01-01) 国家自然科学基金(41506219) 上海市浦江人才计划(15PJ403000)
【分类号】：P731.16
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