【摘要】 本文基于日本东京湾、伊势湾和浜名湖的调查资料，详细地比较了这3个海湾海水中的溶存甲烷浓度、饱和度。表层海水中，溶存甲烷浓度以供名湖最高，达95nmol／dm3，伊势湾和东京湾相近，分别为41nmol／dm3和37nmol／dm3；其表层测定浓度是其平衡浓度的13～78倍，并分别计算了这3个海湾中甲烷的海气交换通量；用平均值外推法得出全球海洋环境中总的甲烷海气交换通量为6．3Tg／a。更多还原

【Abstract】 Based on our investigative data for Tokyo Bay, Ise Bay, and Hamana Lake in Japan , thispaper compared the concentration and saturation factor of the dissolved methane in seawater of these three estuaries. In the surface water, it was found that the dissolved methane concentration of Hamana Lake was the highest, as hiSh as 95 nmol/dm3, those of Tokyo and Ise Bay were very close, being 37 nmol/dm3, 41 nmol/nm3,respectively. The determined concentration were 13 to 78 times their equilibrium ones. The sea-air exchange of the methane in the three Bays were also calculated separately. Extrapolation of the averaged data from this study indicates that the totalglobal oceanic sea-air exchange flux of methane is 6. 3 Tg/a.更多还原