The Influence of Nonlinear Mesoscale Eddies on Near-Surface Oceanic Chlorophyll

被引：536

作者：

Chelton, Dudley B. ^{[1
]}

Gaube, Peter ^{[1
]}

Schlax, Michael G. ^{[1
]}

Early, Jeffrey J. ^{[2
]}

Samelson, Roger M. ^{[1
]}

机构：

[1] Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA

[2] NW Res Associates Inc, Bellevue, WA 98009 USA

来源：

SCIENCE | 2011年 / 334卷 / 6054期

基金：

美国国家科学基金会;

关键词：

ROSSBY WAVES; PLANETARY-WAVES; SARGASSO SEA; SATELLITE; EVOLUTION; SPEED;

D O I：

10.1126/science.1208897

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Oceanic Rossby waves have been widely invoked as a mechanism for large-scale variability of chlorophyll (CHL) observed from satellites. High-resolution satellite altimeter measurements have recently revealed that sea-surface height (SSH) features previously interpreted as linear Rossby waves are nonlinear mesoscale coherent structures (referred to here as eddies). We analyze 10 years of measurements of these SSH fields and concurrent satellite measurements of upper-ocean CHL to show that these eddies exert a strong influence on the CHL field, thus requiring reassessment of the mechanism for the observed covariability of SSH and CHL. On time scales longer than 2 to 3 weeks, the dominant mechanism is shown to be eddy-induced horizontal advection of CHL by the rotational velocities of the eddies.

引用

页码：328 / 332

页数：5

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