全球大洋环流诊断模式研究——流场及流函数  

Diagnostic Study of the World Ocean Circulation ——Current Field and Stream Function

作　　者：魏泽勋[1] 乔方利[1] 方国洪[1] 崔秉昊 方越 王新怡[1] 

机构地区：[1]国家海洋局第一海洋研究所 [2]韩国成均馆大学土木和环境工程系 [3]Texas A&M University, College Station

出　　处：《海洋科学进展》2004年第1期1-15,共15页Advances in Marine Science

基　　金：国家自然科学基金重点项目--热带太平洋年际与年代际海洋环境变异规律(40136010);国家重点基础研究发展规划项目--中国近海环流形成变异机理;数值预测方法及对近海环境影响的研究(G1999043808);国家高新技术研究发展计划项目青年基金--厄尔尼诺事件的多源资料同化技术研究(2002AA639350)

摘　　要：基于GFDL的MOM模式建立一个全球大洋环流的诊断模式(Robustdiagnosticmodel)来研究全球大洋环流。水平空间分辨率1°×1°。垂向分为21层。分别进行月平均和年平均模拟,积分的时间长度为11a。模式水流来自DBDB5(NationalGeodeticCenter,Boulder,Colorado)。所用的温度、盐度数据根据Levitus(1994)的资料,表面风应力根据HellermanandRosenstein(1983)的全球风场数据插值而来。从模拟结果看,全球大洋中的主要环流结构均得到体现。北太平洋副热带流圈得到合理的模拟,其最大的输运超过50Sv。北赤道流在12°N附近分为南北两支。北支形成黑潮,而南支为棉兰老海流,在其东边,棉兰老冷涡得到很好的再现。在吕宋海峡有海水进入南海,在南海形成一个气旋式流圈,进而通过南海南部水道流入印度尼西亚海。模拟结果表明南极绕极流和黑潮可以深达底层。湾流则不能深达底层,其下方在1000～2000m深度存在南向的深层流,显示了大西洋深层水的流动。Based on the Modular Ocean Model(MOM) of GFDL, a global diagnostic model is established to study the world ocean circulation, the model has a horizontal resolution of 1 °×1 ° and 21 vertical (levels), and the integrated time length is 11 years. The water depth data for the model are taken from DBDB5 data of National Geodetic Center, Boulder, Colorado, the temperature and salinity data are taken from Levitus(1994) data, and the sea surface wind stress data are taken from Hellerman and Rosenstein(1983) data. It is shown from the simulated results that the main circulation systems in the world ocean have been represented. The subtropic gyre in the North Pacific is reasonably simulated with the maximum transport of more than 50 Sv. The North Equatorial Current splits off into two branches at about 12 °N, the north branch forms the origin of the Kuroshio, the south branch is the Mindanao Current, and the Mindanao Cold Eddy east of the Mindanao Current is fairly reproduced. A current flows through the Luzon Strait to enter the South China Sea to form a cyclonic circulation, and then flows into the Indonesian waters through the passages of the southern South China Sea. The simulated results indicate that the Antarctic Circumpolar Current and the Kuroshio can go down to the bottom layer, but the Gulf Stream cannot, and there is a southward deep current at depths of 1000 to 2000m beneath the Gulf Stream, which indicates the southward movement of the North Atlantic Deep Water.

关 键 词：MOM模式 大洋环流 诊断模式 水平空间分辨率 流场 流函数 

分 类 号：P731[天文地球—海洋科学]