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Methane Emission from Palsa Mires in Northeastern European Russia
Russian Meteorology and Hydrology ( IF 0.7 ) Pub Date : 2021-04-26 , DOI: 10.3103/s1068373921010076
М. N. Miglovets , S. V. Zagirova , N. N. Goncharova , О. А. Mikhailov

Abstract

Measurement data on methane fluxes in the palsa mire ecosystem at the border of tundra and taiga zones in northeastern European Russia are presented. It was found for the first time that an intense methane flux from the surface of the permafrost mound (palsa) is determined by the spring thawing of the seasonally thawed horizon in the layer of 14–25 cm. During this period, the emission was 4–20 times higher than the summer values. In lichen communities of peat mounds, the CH4 sink prevailed during the summer-autumn period. The total methane flux in different parts of the mire in June–September varied from 0.18 to 16.5 kg CH4/ha. In general, the palsa mire emitted 81 kg CH4/ha per year to the atmosphere. The methane emission from the surface of peat mounds and hollows made up 20% and 80% of the annual flux, respectively.



中文翻译:

俄罗斯东北部Palsa Mires的甲烷排放

摘要

给出了俄罗斯东北部冻原和taiga地区边界的帕尔萨沼泽生态系统中甲烷通量的测量数据。首次发现,永久冻土丘(palsa)表面的强烈甲烷通量是由季节融化的14-25厘米层中的春季融化所决定的。在此期间,排放量是夏季排放量的4至20倍。在泥炭丘的地衣群落中,CH 4汇在夏季至秋季盛行。6月至9月泥潭不同部分的总甲烷通量在0.18至16.5 kg CH 4 / ha之间。一般来说,泥潭排放出81公斤CH 4/ ha每年。泥炭丘和凹陷表面的甲烷排放量分别占年通量的20%和80%。

更新日期:2021-04-27
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