A Description of Local and Nonlocal Eddy-Mean Flow Interaction in a Global Eddy-Permitting State Estimate

被引：144

作者：

Chen, Ru ^{[1
]}

Flierl, Glenn R. ^{[2
]}

Wunsch, Carl ^{[2
,3
]}

机构：

[1] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92037 USA

[2] MIT, Cambridge, MA 02139 USA

[3] Harvard Univ, Cambridge, MA 02138 USA

来源：

JOURNAL OF PHYSICAL OCEANOGRAPHY | 2014年 / 44卷 / 09期

关键词：

AVAILABLE POTENTIAL-ENERGY; ANTARCTIC CIRCUMPOLAR CURRENT; KINETIC-ENERGY; BAROCLINIC INSTABILITY; GENERAL-CIRCULATION; OCEAN CIRCULATION; MOMENTUM FLUXES; SOUTHERN-OCEAN; NEAR-SURFACE; MODEL;

D O I：

10.1175/JPO-D-14-0009.1

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

The assumption that local baroclinic instability dominates eddy-mean flow interactions is tested on a global scale using a dynamically consistent eddy-permitting state estimate. Interactions are divided into local and nonlocal. If all the energy released from the mean flow through eddy-mean flow interaction is used to support eddy growth in the same region, or if all the energy released from eddies through eddy mean flow interaction is used to feed back to the mean flow in the same region, eddy mean flow interaction is local; otherwise, it is nonlocal. Different regions have different characters: in the subtropical region studied in detail, interactions are dominantly local. In the Southern Ocean and Kuroshio and Gulf Stream Extension regions, they are mainly nonlocal. Geographical variability of dominant eddy-eddy and eddy-mean flow processes is a dominant factor in understanding ocean energetics.

引用

页码：2336 / 2352

页数：17

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