| 2011年1月普里兹湾埃默里冰架附近水文特征 |
| |
| 引用本文： | 严金辉,李锐祥,侍茂崇,葛人峰,孙永明.2011年1月普里兹湾埃默里冰架附近水文特征[J].极地研究,2012,24(2):101-109. |
| |
| 作者姓名： | 严金辉 李锐祥 侍茂崇 葛人峰 孙永明 |
| |
| 作者单位： | 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 |
| |
| 基金项目： | 中国极地科学战略研究基金，国家自然科学基金，国家科技支撑计划课题 |
| |
| 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 |
| 收稿时间： | 2011-08-30 |
OCEANOGRAPHIC FEATURES NEAR THE AMERY ICE SHELF IN PRYDZ BAY,ANTARCTICA,JANUARY 2011 |
| |
| Yan Jinhui
,
Li Ruixiang
,
Shi Maochong
,
Ge Renfeng
,
Sun Yongming.OCEANOGRAPHIC FEATURES NEAR THE AMERY ICE SHELF IN PRYDZ BAY,ANTARCTICA,JANUARY 2011[J].Chinese Journal of Polar Research,2012,24(2):101-109. |
| |
| Authors: | Yan Jinhui Li Ruixiang Shi Maochong Ge Renfeng Sun Yongming |
| |
| Institution: | 1South China Sea Marine Engineering Prospecting Center,SOA,Guangzhou 510300,China; 2Ocean University of China,Qingdao 266003,China;3First Institute of Oceanography,SOA,Qingdao 266061,China) |
| |
| Abstract: | Conductivity,temperature and depth(CTD) data were collected by the R/V Xue Long icebreaker at 24 sites north of the Amery Ice Shelf.The data showed that in west Prydz Bay,between 71—72°E,there is a clockwise mesoscale eddy,which leads to deeper,colder water,with higher salinity and increased density.As a result of the eddy,the ice shelf water moves eastward and turns to the northeast near 73°30′E.In summer,the thickness of the surface water is about 20 m in the eastern section and about 50 m in the western section,influenced by the mesoscale eddy.Within the water layer less than 50 m,water temperature is slightly higher in the lower layer than at the surface.This is termed a temperature inversion layer.In the western section,there is a density-related ’static instability’ phenomenon at depths of about 160—200 m,with layer thicknesses of less than 10 m at many sites.Mixing by advection and diffusion may be the main reason for this instability phenomenon. |
| |
| Keywords: | Prydz Bay Amery Ice Shelf oceanographic features mesoscale eddy |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《极地研究》浏览原始摘要信息 |
| 点击此处可从《极地研究》下载免费的PDF全文 |
|
