极地研究

极地研究 ›› 2012, Vol. 24 ›› Issue (2): 101-109.DOI: 10.3724/SP.J.1084.2012.00101

• 研究论文 •    下一篇

2011年1月普里兹湾埃默里冰架附近水文特征

严金辉1,李锐祥1,侍茂崇2,葛人峰3,孙永明2   

  1. 1 国家海洋局南海工程勘察中心 
    2 中国海洋大学
    3 国家海洋局第一海洋研究所
  • 收稿日期:2011-08-30 修回日期:2011-11-28 出版日期:2012-06-30 发布日期:2012-06-30
  • 通讯作者: 严金辉
  • 基金资助:

    艾默里冰架边缘冰间湖的成因、变化及冰—海相互作用;南大洋水团与环流监测技术及应用研究

The Oceanographic features near Amery Ice Shelf of the Prydz Bay in January 2011

Yan Jinhui1，Li Ruixiang1，Shi Maochong2，Ge Renfeng3，Sun Yongming2   

  1. 1 South China Sea Marine Engineering Prospecting Center,SOA
    2 Ocean University of China
    3 First Institute of Oceanography,SOA
  • Received:2011-08-30 Revised:2011-11-28 Online:2012-06-30 Published:2012-06-30

PDF (PC)

1508

被引次数

8

摘要： 分析“雪龙”号2011年在普里兹湾埃默里冰架外缘24个站位的CTD观测结果，发现有以下一些水文特征：普里兹湾西部，在71°E-72°E范围内，存在一个顺时针运动的中尺度涡。由于这个涡旋存在，冰架水主要扩散方向偏东，在73°30′E附近，流向东北；夏季表层水厚度，东部基本在20m，西部受中尺度涡和其他因素的影响，夏季表层水厚度深达50m左右；在50m以浅的水层内，表面以下温度会出现稍微增大现象，我们称之为逆温层，它是结冰、融冰和海冰覆盖变化造成的；在观测断面西部，在160m～200m水层内，多站出现“静力不稳定”：即上层密度大于下层，厚度有几米，平流混合扩散可能是这一不稳定现象主要原因。

关键词: 普里兹湾, 埃默里冰架, 水文特征, 中尺度涡

Abstract: Based on the CTD observational data from 24 stations of a section over the north edge of the Amery Ice Shelf during the 27th Chinese National Antarctic Research Expedition executed by China ‘Xuelong’ vessel, some oceanographic features are described as follow: In the west of the Prydz Bay, about the range of 71-72oE, there exists a clockwise mesoscale eddy. Owing to the existence of eddy, the ice shelf water flows mainly eastward, and it flows to the northeast near 73o30' E. In summer, the thickness of the surface water in the eastern section is about 20m, influenced by the eddy that in the western section is approximately 50m. Within the water less than 50m, water temperature in deeper layer slightly greater than in surface, i.e. so called temperature inversion layer, which is caused by freezing and melting of the sea ice. In the west of the section, there appears ‘static instability’ at many stations about 160m~200m in depths, i.e. the density is greater than that in lower with several meter in thickness. Advection mixing diffusion may be the main causing factor for this instability.

Key words: Prydz Bay, Amery Ice Shelf, Hydrological features, Mesoscale eddy