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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25325

Title: Hypoxia in the East China Sea: One of the largest coastal low-oxygen areas in the world
Authors: Chung-Chi Chen;Gwo-Ching Gong;Fuh-Kwo Shiah
Contributors: NTOU:Institute of Marine Environmental Chemistry and Ecology
Keywords: Oxygen depletion;Dissolved oxygen;Hypoxia;Chlorophyll;Coastal zone;The East China Sea;The Changjiang (Yangtze) Estuary
Date: 2007-10
Issue Date: 2011-10-20T08:22:16Z
Publisher: Marine Environmental Research
Abstract: abstract:Anoxia and hypoxia have been widely observed in estuarine and coastal regions over the past few decades; however, few reports have focused on the East China Sea (ECS). In June and August 2003, two cruises sampled at stations covering almost the entire shelf of the ECS to examine hypoxic events and their potential causes. In August, DO concentrations <2–3 mg l−1 covered an area estimated at greater than 12,000 km2 (or 432 km3 volume). In contrast, water column DO concentrations exceeded 4 mg l−1 throughout most of the shelf region. A sharp density gradient was observed under the mixed layer in August, restricting vertical re-aeration across this strong pycnocline. Oxygen depletion events, such as that described here for the ECS shelf, are fueled by decomposition of newly produced marine and river-borne biogenic substances (as well as older residual organic matter) deposited to the bottom waters.
Relation: 64(4), pp.399–408
URI: http://ntour.ntou.edu.tw/handle/987654321/25325
Appears in Collections:[海洋環境與生態研究所] 期刊論文

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