大洋环流的通风温跃层研究进展

doi:10.11867/j.issn.1001-8166.2000.03.0266

地球科学进展 ›› 2000, Vol. 15 ›› Issue (3): 266 -270. doi: 10.11867/j.issn.1001-8166.2000.03.0266

大洋环流的通风温跃层研究进展

杜岩,王东晓,施平

中国科学院南海海洋研究所环境动力学开放实验室,广东广州 510301

收稿日期:1999-06-14 修回日期:1999-11-23 出版日期:2000-06-01
通讯作者: 杜岩,男,1975年11月出生于山东省,博士生,主要研究方向为海洋环流理论。
基金资助:
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制、数值预测方法及对环境影响研究”(编号:G1999043806)和国家自然科学基金重点项目“南海海洋环流时空结构及动力机制的研究”(编号:49636230)资助。

ADVANCES IN STUDY OF VENTILATED THERMOCLINE THEORY OF OCEAN CIRCULATION

DU Yan,WANG Dongxiao,SHI Ping

LED,South China Sea Institute of Oceanology,CAS,Guangzhou 510301,China

Received:1999-06-14 Revised:1999-11-23 Online:2000-06-01 Published:2000-06-01

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介绍了大洋环流理论中通风温跃层研究的主要进展。给出了温跃层研究的发展过程、有关通风温跃层的基本概念、通风温跃层内环流的基本特征以及环流通风的计算结果。突出强调了在给出大洋的表面边界条件的情况下,如风应力旋度、背景层化、混合层深度、混合层密度分布以及侧边界条件,如何由通风温跃层理论得到大洋在三维尺度上水体运动的特征。

关键词: 物理海洋学, 通风温跃层, 潜沉, 位势涡度, 抬头线

This paper introduces the major advances in the studies of the ventilated thermocline theory of ocean circulation. The progress in the study of the thermocline, the fundamental conception of the ventilated thermocline, the basic characteristics of circulation in the ventilated thermocline, and the results of the calculation of the ventilated thermocline are given in this paper. LPS' s model consists of a finite but arbitrarily number of inviscid, homogeneous fluid layers each with a different density. The dynamical balances everywhere are Sverdrupian. The position of the outcrop of density interfaces is specified. This outcropping of density allows deep motion to be excited by the ventilation provided by Ekman pumping even in latitudes far south of the outcrop where the layer is shielded from direct influence of the wind. We make a point of how to get the three-dimensional characteristics of circulation according to the ventilated thermocline theory, using realistic surface boundary conditions which are taken from observations, and lateral conditions including the background stratification, the wind-stress curl, the depth of the mixed
layer, and the surface density field. At last, the recent studies of the ventilation thermocline are also discussed.

Key words: The ventilated thermocline, Subduction, Potential vorticity, Outcropping line.

中图分类号:

P733

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