期刊
JOURNAL OF MARINE SYSTEMS
卷 54, 期 1-4, 页码 83-95出版社
ELSEVIER
DOI: 10.1016/j.jmarsys.2004.07.005
关键词
net-offshore transport; metabolic imbalance; seaward filament
We have studied the physicochemical and biological structure of a permanent filament off Cape Ghir (31 degrees N) and estimated the transport of organic matter associated with it. The seaward filament exported coastal upwelled water, with low temperature and salinity and high organic matter, to the open ocean even in the absence of upwelling-favorable conditions. The estimated flux of excess organic carbon (the nonrefractory pool) expressed in annual basis yielded a value of 3.1 x 10(9) kg C, from which similar to 90% was transported as dissolved organic carbon. This flux represents about 63% of the average annual primary production for the region of study. We conclude that the net-offshore transport may contribute to the enrichment of offshore oligotrophic waters throughout the year, partly explaining the metabolic imbalance found in open ocean waters of the subtropical Northeast Atlantic. (c) 2004 Elsevier B.V. All rights reserved.
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