The relationship between the methane seasonal cycle and regional sources and sinks at Tae-ahn Peninsula, Korea

Atmospheric Environment. Part A. General Topics Pub Date : 1993-10-01 DOI:10.1016/0960-1686(93)90041-V

E.J. Dlugokencky , J.M. Harris , Y.S. Chung , P.P. Tans , I. Fung

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引用次数: 22

Abstract

Methane measurements from weekly air samples collected at Tae-ahn Peninsula, Korea (TAP) present new constraints on the regional methane source strength of eastern Asia. Analysis of atmospheric trajectories shows that the lowest methane values observed at Tae-ahn are associated with southeasterly flow off the tropical Pacific Ocean and are similar to those observed at Cape Kumukahi, Hawaii. During June to August, northwesterly flow from the peat-rich wetlands located in the maritime provinces of the Far East former Soviet Union elevates methane at TAP by ∼80 ppb above the annual mean. Analysis of the Tae-ahn observations using a 3-D atmospheric methane model suggests that methane emission rates from the Far East Soviet wetlands may be ∼2 times those of Alaskan wetlands. Also, the relative maximum in May June at Tae-ahn constraints global CH₄ emissions from rice cultivation to ∼100 Tg yr⁻¹.

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泰安半岛甲烷季节循环与区域源汇关系

在韩国泰安半岛收集的每周空气样本的甲烷测量为东亚区域甲烷源强度提供了新的限制。对大气轨迹的分析表明，在泰安观测到的最低甲烷值与热带太平洋的东南气流有关，与在夏威夷库鲁卡希角观测到的甲烷值相似。在6月至8月期间，来自前苏联远东沿海省份富含泥炭的湿地的西北水流使TAP的甲烷含量比年平均水平高出约80 ppb。利用三维大气甲烷模型对Tae-ahn观测结果进行分析表明，远东苏联湿地的甲烷排放率可能是阿拉斯加湿地的2倍。此外，泰安地区5 - 6月的相对最大值将水稻种植的全球CH4排放量限制在~ 100 Tg yr - 1。

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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Atmospheric Environment. Part A. General Topics

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