青藏高原多年冻土活动层厚度对气候变化的响应

发布时间：2018-03-31 06:27

本文选题：青藏高原　切入点：多年冻土　出处：《冰川冻土》2017年01期

【摘要】：活动层厚度变化将会对多年冻土区生态系统、地气间能水平衡和碳循环等产生重要影响。利用Stefan公式模拟了1981-2010年青藏高原多年冻土区活动层厚度的分布和空间变化特征。结果表明:多年冻土区活动层厚度平均为2.39 m,活动层厚度在羌塘盆地最小,在多年冻土区边缘、祁连山、西昆仑山、念青唐古拉山活动层厚度较大。在气候变化条件下,青藏高原多年冻土区活动层厚度呈整体增大趋势,在1981-2010年,活动层厚度的变化量为-1.54~2.24 m,变化率为-5.90~10.13 cm·a~(-1),平均每年变化1.29 cm。活动层增厚趋势与年平均气温增大的趋势基本一致,这说明气候变化对活动层厚度变化有很大的影响。
[Abstract]:The change of active layer thickness will have an important impact on the permafrost ecosystem, the energy and water balance between the earth and atmosphere, and the carbon cycle.The distribution and spatial variation of active layer thickness in permafrost region of Qinghai-Xizang Plateau from 1981 to 2010 were simulated by Stefan formula.The results show that the average thickness of active layer in permafrost region is 2.39 m, and the thickness of active layer in Qiangtang basin is the smallest, and in the edge of permafrost region, Qilian Mountains, West Kunlun Mountains and Nianqingtang Gula Mountains are relatively thick.Under climate change conditions, the active layer thickness in permafrost region of the Qinghai-Xizang Plateau increases as a whole. From 1981 to 2010, the active layer thickness varied from -1.54 ~ 2.24 m to -5.90 ~ 10.13 cm ~ (-1) cm ~ (-1), with an average annual variation of 1.29 cm 路m ~ (-1).The increasing trend of active layer thickness is basically consistent with that of annual average temperature, which indicates that climate change has great influence on the change of active layer thickness.
【作者单位】：中国科学院西北生态环境资源研究院冻土工程国家重点实验室;中国科学院大学;
【基金】：国家自然科学基金项目(41690144;41330634)资助
【分类号】：P467;P642.14

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