Permafrost is warming at a global scale
Permafrost is warming at a global scale
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全球范围内的永久冻土正在变暖
DOI：
10.1038/s41467-018-08240-4
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发表时间：
2019-01-16
影响因子：
16.6
通讯作者：
Lantuit, Hugues
中科院分区：
文献类型：
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作者：
Biskaborn, Boris K.;Smith, Sharon L.;Lantuit, Hugues
永久冻土层变暖有可能放大全球气候变化，因为当冻结的沉积物解冻时，它会释放土壤有机碳。迄今为止，还没有全球一致的永久冻土温度变化评估汇编。在这里，我们使用的全球数据集的冻土温度时间序列从全球陆地网络的冻土，以评估整个冻土地区的温度变化，因为国际极地年（2007-2009年）。在2007年至2016年的参考十年间，连续多年冻土区零年振幅深度附近的地温增加了0.39 ± 0.15 °C。在同一时期，不连续的永久冻土变暖了0.20 ± 0.10 °C。山区的永久冻土升温了0.19 ± 0.05 °C，南极洲升温了0.37 ± 0.10 °C。全球冻土温度上升了0.29 ± 0.12 °C。观察到的趋势遵循北极放大的空气温度上升在北方半球。然而，在不连续区，地面变暖发生由于积雪厚度增加，而空气温度保持统计不变。
Permafrost warming has the potential to amplify global climate change, because when frozen sediments thaw it unlocks soil organic carbon. Yet to date, no globally consistent assessment of permafrost temperature change has been compiled. Here we use a global data set of permafrost temperature time series from the Global Terrestrial Network for Permafrost to evaluate temperature change across permafrost regions for the period since the International Polar Year (2007–2009). During the reference decade between 2007 and 2016, ground temperature near the depth of zero annual amplitude in the continuous permafrost zone increased by 0.39 ± 0.15 °C. Over the same period, discontinuous permafrost warmed by 0.20 ± 0.10 °C. Permafrost in mountains warmed by 0.19 ± 0.05 °C and in Antarctica by 0.37 ± 0.10 °C. Globally, permafrost temperature increased by 0.29 ± 0.12 °C. The observed trend follows the Arctic amplification of air temperature increase in the Northern Hemisphere. In the discontinuous zone, however, ground warming occurred due to increased snow thickness while air temperature remained statistically unchanged.