In:
Geophysical monograph, Washington, DC : American Geophysical Union, 1956, 177(2008), Seite 115-130, 0065-8448
In:
volume:177
In:
year:2008
In:
pages:115-130
Description / Table of Contents:
The role of mesoscale eddies in biogeochemical cycles is reviewed with a focus on the nutrient supply to the oligotrophic gyres. Previous estimates of the eddyinduced nutrient supply differ by an order of magnitude, which can be related to different assumptions made about timescales for nutrient consumption and subsequent recharging of nutrient-depleted waters. Results from a fully prognostic eddy-resolving ecosystem-circulation model reveal a magnitude of eddy-induced nitrate supply to the North Atlantic subtropical gyre of typically less than 0.05 mol m-2 year-1. This number includes the contribution by lateral eddy stirring which, on average, is larger than that by vertical eddy pumping. The results are in line with earlier conservative estimates and suggest that previous high estimates of the nutrient supply by eddy pumping have been overestimates.
Type of Medium:
Online Resource
Pages:
graph. Darst
ISSN:
0065-8448
Language:
English
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