贝加尔湖湖面甲烷的空间分布。

Spatial distribution of methane over Lake Baikal surface.

作者信息

Kapitanov V A, Tyryshkin I S, Krivolutskii N P, Ponomarev Yu N, De Batist M, Gnatovsky R Yu

机构信息

Institute of Atmospheric Optics, SB RAS, 1 Akademicheskii ave, 634055, Tomsk, Russia.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2007 Apr;66(4-5):788-95. doi: 10.1016/j.saa.2006.10.036. Epub 2006 Oct 26.

DOI:10.1016/j.saa.2006.10.036

PMID:17185025

Abstract

The results of application of a high sensitivity methane laser detector to investigations of the methane concentration in the atmosphere over Baikal lake are presented as well as methane flows from the water into the atmosphere. The measurements were conducted at a stationary station and aboard the research vessel "Vereschagin" during two summer expeditions in 2003 and 2004. Mean background concentration was equal to (2.00+/-0.16) ppm in August 2003 and (1.90+/-0.07) ppm in June 2004. The areas of methane emission through the water's surface are found to be distinctly localized and to have a characteristic size of about 150-300 m in diameter. The methane concentration in the centers of these areas can reach approximately 27 ppm. Methane flows into the atmosphere in some Baikal regions were measured as well.

摘要

介绍了将高灵敏度甲烷激光探测器应用于贝加尔湖上空大气中甲烷浓度调查以及甲烷从水体向大气排放的研究结果。测量工作于2003年和2004年的两个夏季考察期间，在一个固定站点以及“韦列沙金”号研究船上进行。2003年8月的平均背景浓度为(2.00±0.16) ppm，2004年6月为(1.90±0.07) ppm。发现通过水面排放甲烷的区域明显呈局部化，其特征尺寸直径约为150 - 300米。这些区域中心的甲烷浓度可达约27 ppm。还测量了贝加尔湖一些区域的甲烷向大气的排放量。