Greenhouse gas, upwelling-favorable winds, and the future of coastal ocean upwelling ecosystems

Bakun, A, Field, DB, Redondo-Rodriguez, A and Weeks, SJ (2010) Greenhouse gas, upwelling-favorable winds, and the future of coastal ocean upwelling ecosystems. GLOBAL CHANGE BIOLOGY, 16 4: 1213-1228. doi:10.1111/j.1365-2486.2009.02094.x


Author Bakun, A
Field, DB
Redondo-Rodriguez, A
Weeks, SJ
Title Greenhouse gas, upwelling-favorable winds, and the future of coastal ocean upwelling ecosystems
Journal name GLOBAL CHANGE BIOLOGY   Check publisher's open access policy
ISSN 1365-2486
1354-1013
Publication date 2010-04
Year available 2009
Sub-type Article (original research)
DOI 10.1111/j.1365-2486.2009.02094.x
Volume 16
Issue 4
Start page 1213
End page 1228
Total pages 16
Editor Steve Long
Place of publication UK
Publisher Wiley-Blackwell Publishing
Collection year 2010
Language eng
Subject C1
9603 Climate and Climate Change
050101 Ecological Impacts of Climate Change
Abstract Coastal ocean upwelling ecosystems generally represent the most productive large marine ecosystems of the world's oceans, in terms of both primary production rates and tonnages of exploitable fish produced. The Peruvian upwelling system, in particular, stands out as a major factor in world fish production. The Pacific trade winds have traditionally been considered to be the primary driving force for the upwelling system off Peru, but are projected to weaken as climate change proceeds. This leads to concern that the upwelling process in the Peru system, to which its productivity is linked, may likewise weaken. However, other mechanisms involving greenhouse-associated intensification of thermal low-pressure cells over the coastal landmasses of upwelling regions suggest general intensification of wind-driven ocean upwelling in coastal upwelling regions of the world's oceans. But although certain empirical results have supported this expectation, it has not been consistently corroborated in climate model simulations, possibly because the scale of the coastal intensification may be small relative to the scales that are appropriately reflected in the standard models. Here we summarize available evidence for the intensification mechanism and present a proxy test that uses variations in water vapor, the dominant natural greenhouse gas, to offer multiple-realization empirical evidence for action of the proposed mechanism in the real world situation. While many potential consequences to the future of marine ecosystems would codepend on climate change-related changes in the thermocline and nutricline structures, an important subset, involving potential increased propensities for hypoxia, noxious gas eruptions, toxic red tide blooms, and/or jellyfish outbreaks, may depend more directly on changes in the upwelling-favorable wind itself. A prospective role of fisheries in either mitigating or reinforcing this particular class of effects is suggested.
Keyword climate change
ecosystem regime shift
ENSO
greenhouse gas
hypoxia
jellyfish outbreaks
sardines
upwelling intensification
CALIFORNIA CURRENT SYSTEM
LOW DISSOLVED-OXYGEN
CLIMATE-CHANGE
EL-NINO
MARINE ECOSYSTEM
BOUNDARY-LAYER
SEA-LEVEL
RED TIDE
TRENDS
PERU
Q-Index Code C1
Q-Index Status Confirmed Code
Additional Notes Published Online: 29 Sep 2009

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Biological Sciences Publications
Centre for Marine Studies Publications
 
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Created: Sun, 14 Mar 2010, 00:05:53 EST