Differences of the atmospheric CH4 concentration between the Arctic and Antarctic regions in pre‐industrial/pre‐agricultural era
Differences of the atmospheric CH4 concentration between the Arctic and Antarctic regions in pre‐industrial/pre‐agricultural era
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前工业/前农业时代北极和南极地区大气CH4浓度差异
DOI：
10.1029/93gl00776
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发表时间：
1993
影响因子：
5.2
通讯作者：
O. Watanabe
中科院分区：
文献类型：
--
作者：
T. Nakazawa;T. Machida;Masayuki Tanaka;Y. Fujii;S. Aoki;O. Watanabe
通过对格陵兰岛J站和南极洲瑞穗站冰芯中的空气样品进行分析，重建了北方和南方高纬度地区过去大气CH 4浓度。结果表明，在本研究所涵盖的前工业/前农业时代，甲烷浓度相当稳定，站点J和瑞穗柱样的平均值分别为756±10和701±10 ppbv，然后随时间显著增加。从站点J岩心获得的甲烷浓度的前工业/前农业水平比从瑞穗岩心获得的高55±20 ppbv，表明天然甲烷源在北方半球比在南半球更强。
Air samples in ice cores from Site J, Greenland and Mizuho, Antarctica were analyzed to reconstruct the past concentrations of atmospheric CH4 at northern and southern high latitudes. The results showed that the CH4 concentrations were fairly constant in the pre-industrial/pre-agricultural era covered by this study, average values being 756±10 and 701±10 ppbv for the Site J and Mizuho cores, respectively, and then increased significantly with time. The pre-industrial/pre-agricultural levels of the CH4 concentration obtained from the Site J core were higher by 55±20 ppbv than those from the Mizuho core, suggesting that natural CH4 sources had been stronger in the northern hemisphere than in the southern hemisphere.