Upwelling indices for comparative ecosystem studies: Variability in the Benguela Upwelling System

被引：65

作者：

Lamont, T. ^{[1
,2
,3
]}

Garcia-Reyes, M. ^{[4
]}

Bograd, S. J. ^{[5
]}

van der Lingen, C. D. ^{[2
,6
,7
]}

Sydeman, W. J. ^{[4
,8
]}

机构：

[1] Dept Environm Affairs, Oceans & Coasts Res Branch, Private Bag X4390, ZA-8000 Cape Town, South Africa

[2] Univ Cape Town, Marine Res Inst, Private Bag X3, ZA-7701 Rondebosch, South Africa

[3] Univ Cape Town, Dept Oceanog, Private Bag X3, ZA-7701 Rondebosch, South Africa

[4] Farallon Inst, 101 H St Suite Q, Petaluma, CA 94952 USA

[5] NOAA, Environm Res Div, Southwest Fisheries Sci Ctr, Monterey, CA USA

[6] Dept Agr Forestry & Fisheries, Branch Fisheries Management, Private Bag X2, ZA-8012 Rogge Baey, South Africa

[7] Univ Cape Town, Dept Biol Sci, Private Bag X3, ZA-7701 Rondebosch, South Africa

[8] Univ Calif Davis, Bodega Marine Lab, POB 247, Bodega Bay, CA 94923 USA

来源：

JOURNAL OF MARINE SYSTEMS | 2018年 / 188卷

关键词：

Benguela upwelling system; Ekman transport; Upwelling indices; South Atlantic high pressure system; SOUTHERN BENGUELA; CLIMATE-CHANGE; OCEAN WINDS; ALGOA BAY; COAST; TRENDS; INTENSIFICATION; COLLAPSE; SARDINE; BARRIER;

D O I：

10.1016/j.jmarsys.2017.05.007

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The influence of climate variability on Eastern Boundary Upwelling Ecosystems (EBUEs) is evident through changes in productivity and shifts in species' distributions, yet to date, metrics of upwelling variability appropriate for comparative ecosystem studies have yet to be implemented. Here, we present synoptic-scale upwelling indices to quantify inter-annual to decadal variations in Ekman transport, at temporal and spatial scales relevant to the biota of EBUEs, and apply them to the Benguela Upwelling System (BUS). From 1979 to 2015, interannual, decadal-scale, and unidirectional variability in upwelling was observed, including a significant recent decrease in upwelling in the northern BUS, and a significant increase on the Agulhas Bank. These trends are associated with changes in the number of upwelling days and events in these regions, and correspond to a shift in the meridional positioning of the South Atlantic High pressure system. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：3 / 16

页数：14

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