Methane fluxes from the sea to the atmosphere across the Siberian shelf seas
Methane fluxes from the sea to the atmosphere across the Siberian shelf seas
复制标题
西伯利亚陆架海从海洋到大气的甲烷通量
DOI：
10.1002/2016gl068977
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发表时间：
2016
影响因子：
5.2
通讯作者：
C. Mörth
中科院分区：
文献类型：
--
作者：
B. Thornton;M. Geibel;P. Crill;C. Humborg;C. Mörth
拉普捷夫海和东西伯利亚海被认为是大气中甲烷 (CH4) 的主要来源。 2014 年夏季，我们对拉普捷夫海和东西伯利亚海上方大气以及地表水中的 CH4 进行了独特的高分辨率同步测量。湍流驱动的沿船迹的海气通量是从这些观察中得出的。经计算，拉普捷夫海的平均扩散通量为 2.99 mg m−2 d−1，东西伯利亚海西部无冰部分的平均扩散通量为 3.80 mg m−2 d−1。尽管在研究区域的两个位置观察到海底气泡羽流，但我们的计算表明，在区域上，湍流驱动的扩散通量单独解释了观察到的大气 CH4 增强，与早期的报告相比，气泡通量仅发挥局部有限的作用。某些地区的冰下海水中的 CH4 表明每年结冰时也会发生短暂的通量。
The Laptev and East Siberian Seas have been proposed as a substantial source of methane (CH4) to the atmosphere. During summer 2014, we made unique high‐resolution simultaneous measurements of CH4 in the atmosphere above, and surface waters of, the Laptev and East Siberian Seas. Turbulence‐driven sea‐air fluxes along the ship's track were derived from these observations; an average diffusive flux of 2.99 mg m−2 d−1 was calculated for the Laptev Sea and for the ice‐free portions of the western East Siberian Sea, 3.80 mg m−2 d−1. Although seafloor bubble plumes were observed at two locations in the study area, our calculations suggest that regionally, turbulence‐driven diffusive flux alone accounts for the observed atmospheric CH4 enhancements, with only a local, limited role for bubble fluxes, in contrast to earlier reports. CH4 in subice seawater in certain areas suggests that a short‐lived flux also occurs annually at ice‐out.
影响因子：
5.2
作者：
Guenther, F.;Overduin, P. P.;Grigoriev, M. N.
通讯作者：
Grigoriev, M. N.