2008年夏季楚科奇陆架海域近底层水温大幅快速变化事件研究  

Rapid and significant temperature changes at the near bottom of central Chukchi Sea in summer 2008

作　　者：舒启[1,2] 乔方利[1,2] 陈红霞[1,2] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]海洋环境科学和数值模拟国家海洋局重点实验室,山东青岛266061

出　　处：《海洋学报》2012年第1期57-63,共7页

基　　金：国家自然科学基金项目大气-海浪-环流相互作用机理研究及耦合数值模式改进(40730842);国家海洋局第一海洋研究所基本科研业务费专项资金项目(2011T02);国家科技支撑计划(2011BAC03B02)

摘　　要：2008年夏季中国第3次北极科学考察期间,利用锚碇潜标对北冰洋楚科奇陆架海域进行了为期33d的海流剖面、近底层温度与盐度连续观测。观测数据显示楚科奇陆架海域近底层海水温度出现了两次较大幅度的快速升降现象。结合此次科学考察R断面温盐深仪(CTD)观测资料、以及卫星遥感海表温度(SST)和海表风场等资料,综合分析表明:观测到的这种快速升、降温现象不仅发生在近底层;这种快速升、降温现象应该是由海水温度锋面在夏季整体缓慢北移的同时存在短暂南北摆动所导致;温度锋面的季节性北移属于北极气候特征,而温度锋面短暂的南北摆动则与短期天气过程有关。During the third CHINARE Arctic Expedition in summer 2008,33 days of current profile,near bottom sea water temperature and salinity data in central Chukchi Sea were collected by a mooring system（CN-1）.The observed data shows that near bottom water temperature has two rapid and significant changes during the observation.CTD（Conductivity Temperature Depth） data along R-section collected in this expedition,NOAA（National Oceanic and Atmospheric Administration） AVHRR（Advanced Very High Resolution Radiometer） SST（Sea Surface Temperature） and NOAA sea surface wind data are used to analyze the rapid and significant temperature changes.The results showed that water temperature changes rapidly at not only the bottom layer but also the upper layer.The rapid temperature changes are caused by the movement of temperature front.The movement consists of two parts,northward movement and swing in the direction of north-south.The northward movement is related to climate characteristics,and the swing is related to synoptic characteristics.

关 键 词：北冰洋 楚科奇海 温度锋面 快速升降温 

分 类 号：P729[天文地球—海洋科学] P731.11