Spatial Distribution of Methane Concentration in Baikal Surface Water in the Spring Period

IF 0.9 Q4 OPTICS
D. A. Pestunov, A. M. Shamrin, V. M. Domysheva, M. V. Sakirko, M. V. Panchenko
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Abstract

The results of describing the spatial distribution of methane concentration in the surface water of Lake Baikal in the spring are presented. The basis was the measurements of CH4 content which were first carried out in the round-the-clock continuous mode along the entire route of the passage of research vessel in the complex expeditions of Limnological Institute, Siberian Branch, Russian Academy of Sciences, in the spring seasons of 2013, 2016, 2017, 2018, 2021, and 2022. Based on the results of six expeditions, a merged data array was compiled; it included 12 100 segments (with a step of 0.005° in latitude and 0.01° in longitude) which covered the total area 4466.7 km2, or 14% of the surface of Lake Baikal. For a more detailed description of the spatial distribution of methane concentrations in surface water throughout the Baikal water area, the statistical characteristics were calculated in four zones: between 0 and 100 m, 100 and 200 m, 200 and 400 m, and over 400 m isobaths. The comparison of the methane concentrations in the analyzed array with the data of other researchers obtained in different years in nearby regions of the water area made it possible to conclude that the results presented in the work adequately reflect the most stable features of the spatial distribution of methane concentration in surface water of Lake Baikal in spring seasons.

Abstract Image

Abstract Image

春季贝加尔湖地表水甲烷浓度的空间分布
摘要 本文介绍了春季贝加尔湖表层水甲烷浓度空间分布的描述结果。其基础是俄罗斯科学院西伯利亚分院湖沼研究所在 2013、2016、2017、2018、2021 和 2022 年春季进行的综合考察中首次以全天候连续模式沿考察船通过的整个路线进行的甲烷含量测量。根据六次考察的结果,编制了合并数据阵列;其中包括 12 100 个区段(纬度步距为 0.005°,经度步距为 0.01°),覆盖总面积 4466.7 平方公里,即贝加尔湖湖面的 14%。为了更详细地描述整个贝加尔湖水域地表水甲烷浓度的空间分布情况,计算了四个区域的统计特征:0 至 100 米、100 至 200 米、200 至 400 米以及 400 米以上等深线。通过将分析阵列中的甲烷浓度与其他研究人员不同年份在附近水域获得的数据进行比较,可以得出结论:该研究成果充分反映了春季贝加尔湖地表水甲烷浓度空间分布的最稳定特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
2.40
自引率
42.90%
发文量
84
期刊介绍: Atmospheric and Oceanic Optics  is an international peer reviewed journal that presents experimental and theoretical articles relevant to a wide range of problems of atmospheric and oceanic optics, ecology, and climate. The journal coverage includes: scattering and transfer of optical waves, spectroscopy of atmospheric gases, turbulent and nonlinear optical phenomena, adaptive optics, remote (ground-based, airborne, and spaceborne) sensing of the atmosphere and the surface, methods for solving of inverse problems, new equipment for optical investigations, development of computer programs and databases for optical studies. Thematic issues are devoted to the studies of atmospheric ozone, adaptive, nonlinear, and coherent optics, regional climate and environmental monitoring, and other subjects.
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