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首页> 外文会议>International Conference on Permafrost >Recent Hydrological and Ecological Changes in Relation to Permafrost Degradation under Increased Precipitation in an Eastern Siberian Boreal Forest
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Recent Hydrological and Ecological Changes in Relation to Permafrost Degradation under Increased Precipitation in an Eastern Siberian Boreal Forest

机译：近西伯利亚北部森林沉淀下沉积冻土性降解的最新水文和生态变化

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摘要

The study presents linkages between permafrost degradation and ecohydrological change in the central Lena River basin in eastern Siberia. Consecutive positive anomalies in winter snow accumulation and summer precipitation after winter 2004 caused abrupt soil warming in the active layer and upper part of the permafrost through increased summer soil thermal conductivity and latent heat storage. Degradation of permafrost resulted in thermokarst in and around alas lakes. Expansion of the alas lake area caused fatal damage to the boreal (larch) forest. The circumference of the water-filled lake floods and erodes the side slopes. Trees surrounding the lake were then perennially waterlogged and they finally withered. Sap flow measurements showed significant reduction in transpiration from the damaged trees, which were located in waterlogged depressions with a deepening active layer.
机译：该研究提出了在西伯利亚东部莱茵河河流域中央冻土降解和生态学变化之间的联系。 2004年冬季冬季雪积累和夏季降水中连续的正异常引起了夏季土壤导热系和潜热储存的永磁冻土中的活跃层和上半部分突然变暖。永久冻土的降解导致Alas湖泊周围的热量。 Alas Lake Lake的扩张导致北方（LARCH）森林造成致命伤害。充满水湖的圆周泛滥并侵蚀侧倾斜坡。湖周围的树常常涝，他们终于枯萎了。 SAP流量测量显示出损坏的树木蒸腾的显着降低，其位于具有加深的活性层的灌木丛中。

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