Hypoxia in the East China Sea: One of the largest coastal low-oxygen areas in the world

Chung Chi Chen, Gwo Ching Gong, Fuh Kwo Shiah

研究成果: 雜誌貢獻文章同行評審

235 引文 斯高帕斯(Scopus)

摘要

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.

原文英語
頁(從 - 到)399-408
頁數10
期刊Marine Environmental Research
64
發行號4
DOIs
出版狀態已發佈 - 2007 十月

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science
  • Pollution

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