AbstractThe high sensitivity of the Tibetan Plateau (TP) to global warming is ascribed not only to its high alt'/> Lake dynamics and its relationship to climate change on the Tibetan Plateau over the last four decades
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Lake dynamics and its relationship to climate change on the Tibetan Plateau over the last four decades

机译：近四十年来青藏高原的湖泊动力学及其与气候变化的关系

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摘要

AbstractThe high sensitivity of the Tibetan Plateau (TP) to global warming is ascribed not only to its high altitude and low temperature but also to the change in the components of water cycling, such as glaciers’ retreat, permafrost degradation, and lakes’ shrinkage or expansion. Among the components, change in lakes attracts more attention as lakes are crucial for local water management and are easier to monitor. But, how water cycling components respond to global change remains unclear, although they are crucial in understanding the regional environmental change. Lakes, glaciers, and permafrost data derived from meteorological records and remote sensing images were used to detect the change of the water environment on the TP from 1971 to 2013. The climate on TP changed toward a warm-humid condition in the last four decades. Three-quarters of the lakes were significantly expanded over the TP, and the summed area of all the lakes increased by 6061 km2from 1975 to 2010. Panel regression showed that annual average air temperature (T), annual precipitation (P), and reference crop evapotranspiration (ETo) regulate the change in lake surface area (LSA) on the entire TP. The change in LSA is more related to the change inPthan in the other two factors, even in the catchment where lakes are recharged by water from glacier melting and permafrost degradation, especially in extremely arid and arid climate zones. Elevation and size affected the sensitivity of lakes to climate change with lakes in a high-elevation area more sensitive toTand small lakes more sensitive toT,P, andETo. Warming-induced glacier’s retreat led to the significant lake expansion, while permafrost degradation might be responsible for the lake shrinkage in the seasonally frozen ground area due to the related cryogenic waterproof layer downward. Our results about the responses of lakes to climate change in different catchments were in accordance with the findings of previous studies about several typical lakes, which implied that overall response of all the lakes to climate change could be obtained by examining several typical lakes in the catchment level.
机译： Abstract 青藏高原（TP）对全球变暖的高度敏感性并非归因于这不仅取决于其高海拔和低温，还取决于水循环的组成部分的变化，例如冰川的退缩，多年冻土的退化以及湖泊的收缩或膨胀。在这些要素中，湖泊的变化吸引了更多的关注，因为湖泊对于当地的水管理至关重要，而且更易于监控。但是，尽管水循环要素对于理解区域环境变化至关重要，但尚不清楚。从气象记录和遥感图像获得的湖泊，冰川和多年冻土数据被用于检测TP至1971年至2013年水环境的变化。在过去的40年中，TP的气候向暖湿状态转变。从1975年到2010年，四分之三的湖泊在TP上显着扩大，所有湖泊的总面积增加了6061 km 2 。面板回归表明，年平均气温（<强调类型=“ Italic”> T ），年降水量（ P ）和参考作物蒸散量（ ET o ）可调节整个TP上的湖泊表面积（LSA）的变化。 LSA的变化与 P 的变化比其他两个因素更相关，即使在流域中，冰川融化和多年冻土退化给水补给了湖泊，特别是在极端干旱和干旱的气候区。高程和大小影响湖泊对气候变化的敏感性，高海拔地区的湖泊对 T 敏感，而小湖泊对 T敏感， P 和 ET o < /下标>。由增温引起的冰川退缩导致湖泊明显扩张，而永久冻土的退化可能是由于季节性的低温防水层向下而导致季节性冻土地区湖泊收缩的原因。我们关于不同流域湖泊对气候变化的响应的结果与先前对几种典型湖泊的研究结果相吻合，这意味着可以通过检查流域中的几种典型湖泊来获得所有湖泊对气候变化的总体响应。级别。

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  • 来源
    《Regional Environmental Change》 |2018年第2期|477-487|共11页
  • 作者

    Siyang Dong; Fei Peng; Quangang You; Jian Guo; Xian Xue;

  • 作者单位

    Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences,University of Chinese Academy of Sciences;

    Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences,International platform for dryland research and education, arid land research center, Tottori University;

    Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences;

    Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences;

    Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences;

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  • 正文语种 eng
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  • 关键词

    Anusplin interpolation; Climate change; Lake change; Panel regression model; Remote sensing; Tibetan Plateau;

    机译：Anusplin插值;气候变化;湖面变化;面板回归模型;遥感;西藏高原;

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