Greenhouse gas formation in ice wedges at Cyuie, central Yakutia
Greenhouse gas formation in ice wedges at Cyuie, central Yakutia
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雅库特中部 Cyuie 冰楔中的温室气体形成
DOI：
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发表时间：
2019
影响因子：
5
通讯作者：
J. Ahn
中科院分区：
文献类型：
--
作者：
Kyungmin Kim;Ji‐Woong Yang;Hyun;Eunji Byun;A. Fedorov;Y. Ryu;J. Ahn
冰楔中的温室气体（GHGs）可以提供有关冰的地球化学环境的有用信息。先前的研究报告了冰楔中CO2和CH 4混合比的高度升高。然而，冰楔中的N2 O混合比仍然未知。在这里，我们目前的CO2，CH 4和N2 O混合比气泡和温室气体形成的两个湖边冰楔在雅库茨克附近的Cyuie村的合理机制。CO2气体年龄对应于末次盛冰期（18-19 ka）。冰的δ（N2/Ar）值和气泡形状表明冰楔是由干雪压实而不是融雪水再冻结形成的，而冰的δ 18 O和δD值则反映了末次盛冰期源区位置和/或气候的变化。使用干提取方法，我们获得了7- 13%CO2、5-130 ppm CH 4和100-5000 ppb N2 O的气体混合比。δ（O2/Ar）值表明大部分O2被生物呼吸消耗。CH 4与N2 O、CO2呈负相关。N_2O可能抑制了CH_4的产生。
Greenhouse gases (GHGs) trapped in ice wedges may provide useful information on biogeochemical environments in ground ice. Previous studies have reported highly elevated CO2 and CH4 mixing ratios in ice wedges. However, N2O mixing ratios in ice wedges remain unknown. Here, we present CO2, CH4 and N2O mixing ratios in bubbles and plausible mechanisms of GHG formation for two lakeside ice wedges at Cyuie village near Yakutsk. The CO2 gas age corresponds to the Last Glacial Maximum (18–19 ka). The δ(N2/Ar) values and bubble shapes indicate that the ice wedges formed by dry snow compaction rather than snowmelt water refreezing, while the δ18O and δD values of the ice indicate changes in the source area location and/or the climate during the Last Glacial Maximum. Using a dry extraction method, we obtained gas mixing ratios of 7–13% CO2, 5–130 ppm CH4 and 100–5000 ppb N2O. The δ(O2/Ar) values imply that most of the O2 was consumed by biological respiration. The CH4 is negatively correlated with N2O and CO2. The N2O might have inhibited CH4 production.
影响因子：
4.4
作者：
Palmer, Katharina;Horn, Marcus A.
通讯作者：
Horn, Marcus A.
影响因子：
18.3
作者：
H. Meyer;T. Opel;T. Laepple;A. Dereviagin;Kirstin Hoffmann;M. Werner
通讯作者：
H. Meyer;T. Opel;T. Laepple;A. Dereviagin;Kirstin Hoffmann;M. Werner
影响因子：
12.1
作者：
Strauss, Jens;Schirrmeister, Lutz;Veremeeva, Alexandra
通讯作者：
Veremeeva, Alexandra