首页 | 本学科首页   官方微博 | 高级检索  
     检索      

楚科奇海海冰周年变化特征及其主要关联因素
引用本文:赵进平,朱大勇,史久新.楚科奇海海冰周年变化特征及其主要关联因素[J].海洋科学进展,2003,21(2):123-131.
作者姓名:赵进平  朱大勇  史久新
作者单位:1. 国家海洋局第一海洋研究所,山东,青岛,266061
2. 国家海洋局第二海洋研究所,浙江,杭州,310012
基金项目:国家自然科学基金项目——北极多年变化及其机理的综合研究(49876008),中国科学院重大项目——北极典型地区环境过程及其与全球变化的关系(KZ951 A1 205)
摘    要:利用1999年美国国家冰雪资料中心的各种卫星遥感综合分析数据对楚科奇海海冰周年变化进行详细分析,将全年的海冰变化过程分成密集冰封期、东岸融化期、单湾结构期、双湾结构期、三湾结构期、全线北撤期、南进封闭期、全面冻结期8个阶段。海冰冻结期仅2个月,海冰融化期持续4~5个月,说明融冰过程的吸热是个漫长的过程。太平洋与北冰洋海面高度差形成的正压压强梯度力是白令海水进入北冰洋的主要动力,白令海水进入冰下形成的暖水海冰边缘区是海冰融化的重要机制。白令海水在楚科奇海扩散过程受到海底地形产生的Taylor柱效应的显著影响,使其产生绕过浅滩,沿海谷流动,在海谷的方向上输送更多的水体和热量的现象,形成海冰融化的湾状结构。楚科奇海的局地风场也是海冰形态变化的重要因素之一。局地风场在冬季阻碍白令海水的入流,而在夏季促进白令海水的入流。

关 键 词:楚科奇海  海冰  周年变化  卫星遥感  季节变化  风场
文章编号:1671-6647(2003)02-0123-09
修稿时间:2003年3月20日

Seasonal Variations in Sea Ice and Its Main Driving Factors in the Chukchi Sea
ZHAO Jin-ping,ZHU Da-yong,SHI Jiu-xin.Seasonal Variations in Sea Ice and Its Main Driving Factors in the Chukchi Sea[J].Advances in Marine Science,2003,21(2):123-131.
Authors:ZHAO Jin-ping  ZHU Da-yong  SHI Jiu-xin
Institution:ZHAO Jin-ping~1,ZHU Da-yong~2,SHI Jiu-xin~1
Abstract:In this paper, the seasonal variations in sea ice in the Chukchi Sea are studied in detail by using the satellite remote sensing data analyzed by U.S.A. National Snow and Ice Data Center in 1999. The annual sea ice variational process can be divided into 8 stages, namely, packed ice, melting along the east coast, one-bay, two-bay, three-bay, northward retreating, southward advancing and frozen stages. The freezing process lasts only 2 months, whereas the melting process continues for 4 to 5 months, which indicates that the heat absorption in melting the sea ice takes a much longer time. The barotropic pressure gradient generated by the difference between the sea level heights of the Pacific Ocean and Arctic Ocean is the main driving force for the Bering Sea water to enter the Chukchi Sea, and the Bering Sea water inserts under the sea ice to provide more heat to the sea ice and quicken its melting. The dispersion of the Bering Sea water in the Chukchi Sea is strongly affected by the Taylor column effect of bottom topography, which drives the water to flow round the shoals and along the canyons so that more water volume and heat are transported in the canyon direction to form the bay-shaped molten ice structure. The local wind field over the Chukchi Sea is also an important factor affecting the sea ice pattern variation. The northerly wind in wintertime prevents the Bering Sea water from entering the Chukchi Sea, and the southerly wind in summertime promotes the process for the Bering Sea water to enter the Chukchi Sea.
Keywords:Chukchi Sea  sea ice  satellite remote sensing  seasonal variation  wind field
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号