期刊
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
卷 109, 期 C7, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2004JC002268
关键词
methane; distribution; sea-to-air flux
类别
Distributions and fluxes of methane were determined during two surveys in March-May 2001 in the Yellow Sea and the East China Sea. Methane concentrations in the surface and bottom waters range from 2.52 to 5.48 and 2.81 to 8.17 nM, respectively. The distributions of methane are influenced obviously by the Yangtze River effluent and Kuroshio water. CH4 input via the Yangtze River is estimated to be 3.17 mol/s, of which a considerable part may be lost by air-sea exchange during estuarine mixing. Net CH4 flux exported from the shelf to the Kuroshio is about 1.84 mol/s. Methane enrichments in bottom waters occur widely, which reveals sediment sources of CH4. However, the CH4 input from the sediments of the studied region in spring is lower than other shelf regions due to low organic carbon in the sediments and high O-2 contents in the water column. The sea-to-air methane fluxes are estimated to be 1.36+/-1.45 and 2.30+/-2.36 mumol m(-2) d(-1) using Liss and Merlivat [1986] and Wanninkhof [1992] relationships, respectively, and the estimated spring emission rate of methane ranges from 9.32x10(-3) to 15.7x10(-3) Tg CH4 yr(-1). However, these estimations suffer from the neglect of seasonal variability and should be taken as a low limit. Therefore more measurement campaigns should be carried out to enhance our understanding of this particular oceanic region.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据