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首页> 外文期刊>Regional Environmental Change >Historical changes in the depth of seasonal freezing of 'Xing'anling-Baikal' permafrost in China
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Historical changes in the depth of seasonal freezing of 'Xing'anling-Baikal' permafrost in China

机译：中国“兴安岭-贝加尔湖”多年冻土季节冻结深度的历史变化

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摘要

Xing'anling-Baikal permafrost is located in the southern edge of the Northern Hemisphere permafrost, which is one of the most important regions of permafrost changes. Based on the monthly meteorological data and circumpolar active layer monitoring data in the last few decades, we analyzed the changes in the depth of seasonal freezing (DSF) and the thermal regime of Xing'anling-Baikal permafrost in China, and compared the state with that of the permafrost in Mongolia at the same latitude (LAT). The Xing'anling-Baikal permafrost in China was not connected in the section. The DSF changed between 0.78 and 3.25m. In the study area, DSF was the thickest in Tulihe and reduced to around. The change rate reached -16.0-4.9cm/a and decreased in most areas. The ground temperature raised at a rate of 0-0.41 degrees C/a, whereas that of other few areas decreased with a rate of -0.35 degrees C/a. Freezing duration spanned 141-176days. The changes were related to air temperature, altitude, LAT, and precipitation in the local area. Compared with the state of permafrost in Mongolia at the same LAT, the permafrost in China exhibited a faster rate of degradation. The permafrost in the Xing'anling area significantly responded to climate change. The results will aid in understanding the temporal and spatial variation in local permafrost and provide relevant verification for regional permafrost.
机译：兴安岭-贝加尔湖多年冻土位于北半球多年冻土的南部边缘，这是多年冻土变化最重要的区域之一。根据过去几十年的月度气象数据和绕极活动层监测数据，我们分析了中国兴安岭-贝加尔湖多年冻土的季节冻结深度（DSF）和热状况的变化，并将其与在相同纬度（LAT）下蒙古的多年冻土的温度。该区域中没有连接中国的兴安岭-贝加尔湖永久冻土。 DSF在0.78至3.25m之间变化。在研究区域中，DSF在图里河最厚，并减少到大约。变化率达到-16.0-4.9cm / a，在大多数地区下降。地面温度以0-0.41摄氏度/年的速度上升，而其他少数地区的温度以-0.35摄氏度/年的速度下降。冻结时间跨度为141-176天。变化与当地的气温，海拔，LAT和降水有关。与相同LAT条件下的蒙古多年冻土相比，中国多年冻土的退化速度更快。兴安岭地区的多年冻土对气候变化有显着响应。研究结果将有助于了解当地多年冻土的时空变化，并为区域多年冻土提供相关验证。

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  • 来源
    《Regional Environmental Change》 |2019年第2期|451-460|共10页
  • 作者

    Zhang Zhongqiong; Hou Meiting; Wu Qingbai; Gao Siru;

  • 作者单位

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, 320 Donggangxi Rd, Lanzhou 730000, Gansu, Peoples R China;

    China Meteorol Adm Training Ctr, 46 Zhongguancun Nandajie, Beijing 100081, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, 320 Donggangxi Rd, Lanzhou 730000, Gansu, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, 320 Donggangxi Rd, Lanzhou 730000, Gansu, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    "Xing'anling-Baikal" permafrost; Ground temperature; Depth of seasonal freezing; Local factors;

    机译：兴安岭-贝加尔湖多年冻土;地面温度;季节性冻结深度;局部因素;

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