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contributor authorOey, Lie-Yauw
contributor authorWang, Jia
contributor authorLee, M.-A.
date accessioned2019-09-19T10:02:16Z
date available2019-09-19T10:02:16Z
date copyright2/1/2018 12:00:00 AM
date issued2018
identifier otherjpo-d-17-0041.1.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4260845
description abstractAbstractIn eastern boundary upwelling ecosystems, substantial variance of biological productivity (~50%) can often be related to physical forcing such as winds and ocean temperatures. Robust biophysical connections are less clear-cut in western boundary currents. Here the authors show that interannual variation of fish catch along the western boundary current of the North Pacific, the Kuroshio, significantly correlates (r = 0.67; p < 0.001) with the current?s off-slope (more fish) and on-slope (less fish) sideways shifts in the southern East China Sea. Remotely, transport fluctuations and fish catch are related to the oscillation of a wind stress-curl dipole in the tropical?subtropical gyre of the western North Pacific. Locally, the current?s sideways fluctuations are driven by transport fluctuations through a feedback process between along-isobath pressure gradients and vertical motions: upwelling (downwelling) during the off-slope (on slope) shift, which in turn significantly enhances (depresses) the chlorophyll-a (Chl-a) concentration in winter and early spring. The authors hypothesize that changes in the phytoplankton biomass as indicated by the Chl-a lead to changes in copepodites, the main food source of the fish larvae, and hence also to the observed variation in fish catch.
publisherAmerican Meteorological Society
titleFish Catch Is Related to the Fluctuations of a Western Boundary Current
typeJournal Paper
journal volume48
journal issue3
journal titleJournal of Physical Oceanography
identifier doi10.1175/JPO-D-17-0041.1
journal fristpage705
journal lastpage721
treeJournal of Physical Oceanography:;2018:;volume 048:;issue 003
contenttypeFulltext


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