Methane in the western part of the Sea of Okhotsk in 1998-2000
Methane in the western part of the Sea of Okhotsk in 1998-2000
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DOI：
10.1029/2003jc001910
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发表时间：
2004-09
影响因子：
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通讯作者：
O. Yoshida;H. Inoue;S. Watanabe;S. Noriki;M. Wakatsuchi
中科院分区：
文献类型：
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作者：
O. Yoshida;H. Inoue;S. Watanabe;S. Noriki;M. Wakatsuchi
[1]我们在1998年、1999年和2000年测量了鄂霍次克海西部的海洋甲烷。在库页岛东北部的陆棚上方（约200米）的近底层水中，甲烷浓度每年都非常高：1998年高达488 nmol kg−1，1999年为981 nmol kg−1，2000年为556 nmol kg−1。该高浓度可用于示踪密度范围为26.6 ~ 26.8 σθ的上层密集陆架水。在库页岛以东的陆架，阿穆尔河淡水造成的强烈层结通过抑制垂直对流控制了甲烷的向上输送。计算出的甲烷通量在库页岛东北陆架区最大（88 mol CH 4 km−2 d−1）。在鄂霍次克海西部（0.73 × 106平方公里，占鄂霍次克海总面积的51%），甲烷的排放率为11千兆克CH 4年−1。
[1] We measured oceanic methane in the western part of the Sea of Okhotsk in 1998, 1999, and 2000. An anomalously high methane concentration was found in near-bottom water above the shelfbreak (∼200 m) off northeast Sakhalin every year: up to 488 nmol kg−1 in 1998, 981 nmol kg−1 in 1999, and 556 nmol kg−1 in 2000. This anomalously high concentration can be used to trace the water with density range 26.6 to 26.8 σθ in the upper Dense Shelf Water. In the shelf off east Sakhalin, a strong stratification caused by freshwater from Amur River controlled the upward transport of methane through the suppression of vertical convection. The calculated methane flux was largest in the northeastern shelf region of Sakhalin (88 mol CH4 km−2 d−1). In the western part of the Sea of Okhotsk (0.73 × 106 km2, 51% of total Sea of Okhotsk area), the emission rate of methane was 11 Gg CH4 yr−1.