Permafrost-Forest Dynamics
Permafrost-Forest Dynamics
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永久冻土-森林动力学
DOI：
--
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
A. Fedorov
中科院分区：
文献类型：
--
作者：
Y. Iijima;A. Fedorov
东西伯利亚位于连续多年冻土区的中心。这一地带最突出的特征是其被落叶针叶林（针叶林）覆盖的广阔地区。在北方生态系统的下面是一个广泛的和巨大的冰层内的永久冻土（Yedoma），这是至关重要的发展，大地面沉降在全新世，这是密切相关的冰量损失。因此，分散的大草原洼地（阿拉斯）和永久冻土退化（热岩溶）下的过渡地形也观察到整个雅库特中部。该地区广泛的热岩溶演化导致了连续的热岩溶地貌的发展。热岩溶过程增强土壤变暖，表明在夏季和冬季的大气变暖和降水量的变化有显着的影响，在活动层和上部的冻土在最近几十年的水热条件。平均活跃层深度增加几十厘米就会释放大量的水和碳。预测永冻土景观变化并不简单;它受到不确定性、需要考虑综合生态系统影响、社会文化相互作用和热液过程的阻碍。正如已经在地方和区域一级指出的那样，永久冻土地貌的变化将对土著人民的生计产生影响。这些与冻土有关的影响将通过冻土退化和同时发生的北方生态系统变化，扩大气候与水和碳循环之间的反馈机制。
Eastern Siberia is located at the centre of a continuous permafrost zone. The most prominent feature of this zone is its vast cover by deciduous coniferous boreal (taiga) forest. Underlying the boreal ecosystem is an extensive and massive ice layer within the permafrost (Yedoma), which was crucial for the development of large ground subsidence during the Holocene, which is closely related to ice volume loss. Therefore, scattered large grassland depressions (alas) and transitional topography under permafrost degradation (thermokarst) are also observed throughout central Yakutia. Extensive thermokarst evolution in this region has resulted in the development of successive thermokarst landforms. Thermokarst processes are enhanced by soil warming, indicating that both atmospheric warming and precipitation changes in summer and winter have had a marked effect on hydrothermal conditions within the active layer and upper part of the permafrost during recent decades. An increase in the mean active-layer depth of only a few tens of centimetres would release large amounts of water and carbon. Predicting permafrost landscape changes is not straightforward; it is hindered by uncertainty, by the need to consider combined ecosystem effects, by sociocultural interactions, and by hydrothermal processes. Permafrost landscape changes will have an impact on indigenous livelihoods, as has already been noted at local and regional levels. These permafrost-related influences will amplify feedback mechanisms between the climate and water and carbon cycles through permafrost degradation and concurrent boreal ecosystem changes.
影响因子：
5
作者：
M. Ulrich;G. Grosse;J. Strauss;Lutz Schirrmeister
通讯作者：
M. Ulrich;G. Grosse;J. Strauss;Lutz Schirrmeister
雅库特中部永久冻土相关湖泊的行为和分布差异及其对气候驱动因素的响应
影响因子：
5.4
作者：
Ulrich;Matthes;Schirrmeister;Schütze;Iijima;Fedorov
通讯作者：
Fedorov