近50年东中国海潜热通量的变化  

Variations of Latent Heat Flux in the East China Sea During the Last 50 Years

作　　者：刘娜[1,2] 吴德星[1] 林霄沛[1] 

机构地区：[1]中国海洋大学物理海洋实验室,山东青岛266100 [2]Leibniz-Institut für Meereswissenschaften,德国基尔24105

出　　处：《中国海洋大学学报（自然科学版）》2010年第4期19-25,共7页Periodical of Ocean University of China

基　　金：自然科学基金项目(40930844);国家基础研究规划重点项目(2005CB422303,2007CB411804);国际科技合作计划项目(2006BFB21250);引智计划项目(B07036)资助

摘　　要：利用1958—2006年OAFlux热通量资料,分析了东中国海海域潜热通量的长期变化特征,并探讨了与局地和太平洋海域影响因素的关系。结果表明:近50 a东中国海潜热通量显著增加,沿黑潮主轴增幅最大。通过分析阿留申低压区(30°N～60°N,160°E～140°W)风场的变化,发现其风应力旋度与东中国海潜热通量变化的主要影响因素海气比湿差存在显著的正相关,表明可能是北太平洋风应力旋度的变化而不是东中国海域风场的变化导致了潜热的长期增加。超前和滞后相关分析表明,东中国潜热通量的变化比北太平洋风应力旋度的变化存在4 a左右的延迟,可能是副热带环流对风场变化调整所需的时间。The latent heat flux（LH） from OAFlux dataset through 1958 to 2006 were used to investigate the long-term variations ofLHin the East China Sea（ECS）.The relationships between theLHand the related physical variables in both ECS and the Pacific were examined.The study showed that there was a steady increase in the ESC averagedLHin the last 50 years,with the maximum increasing rate along the axis of the Kuroshio.By examining the wind stress curl variations in the Aleutian low area,it was indica-ted that the wind stress curl there was highly correlated with the sea-air humidity difference which domi-nantsLHin the ECS.It might be the wind stress curl in the North Pacific not the local wind in the ECS dominants the variations ofLH.The lead and lag correlation,related the sea-air humidity difference in the ECS and the wind stress curl in the Aleutian low area（30°N^60°N,160°E^140°W） indicated a 4-yr lag ofLHin the ECS to the wind stress curl.This delay s reason might be that the adjustment of the gyre circulation changed in the wind field.

关 键 词：潜热通量 东中国海 阿留申低压 

分 类 号：P732.6[天文地球—海洋科学]