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Spatiotemporal changes in snow cover over China during 1960-2013

机译：1960-2013年中国积雪的时空变化

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摘要

Snow cover is highly sensitive to global warming, and it, in return, has huge impacts on global and regional climate change. Because of the limitations of in-situ observations, only a few studies have analyzed the dynamics of snow cover across the whole of China. In this study, we studied the spatio-temporal variabilities of snow cover over China and explored the covary of snow cover with precipitation and temperature in spring and winter based on the surface snow cover observations of 201 meteorological stations in China during 1960-2013. The temporal and spatial distribution characteristics of the mean daily snow depth and the number of snow cover days were analyzed. Results showed snow depth and the number of snow-cover days were high in Northeast China, Eastern China-Inner Mongolia, Northern Xinjiang, Southeastern and South Region of the Tibetan Plateau. The trend of snow depth and the number of snow-cover days varied among different regions. Snow depth recorded at 34.3% of the stations showed an increasing trend during the study period. There were increasing trends of the snow-cover days at 40.8% of stations. Increasing trends of the mean annual daily snow depth and the number of snowcover days were statistically insignificant (p 0.05) while an abrupt change of the number of snow cover days was found in 1975. Change points of the mean daily snow depth in autumn and winter occurred in 1987 and 2008, respectively. Change points of the number of snow-cover days in spring and winter occurred in 2009 and 1983, respectively. Snow cover in China covaried with various climate factors, i.e., precipitation or temperature. This study improved our knowledge on snow cover changes and is beneficial for further studies on climate change in China.
机译：积雪对全球变暖高度敏感，因此对全球和区域气候变化产生巨大影响。由于实地观测的局限性，只有很少的研究分析了整个中国的积雪动态。本研究基于1960-2013年中国201个气象站的地面积雪观测资料，研究了中国积雪的时空变化，并探讨了春季和冬季积雪随温度和降水的变化趋势。分析了平均日降雪深度和积雪天数的时空分布特征。结果表明，青藏高原东北，华东-内蒙古，新疆北部，东南部和南部地区积雪深度高，积雪天数多。不同地区的积雪趋势和积雪天数不同。在研究期间，录得34.3％台站的积雪深度呈上升趋势。 40.8％的站点的积雪天数呈上升趋势。 1975年的平均每日降雪深度和积雪天数的增加趋势在统计学上不显着（p> 0.05），而在1975年则发现积雪天数的急剧变化。冬季分别发生在1987年和2008年。春季和冬季积雪天数的变化点分别发生在2009年和1983年。中国的积雪与各种气候因素（即降水或温度）相关。这项研究提高了我们对积雪变化的认识，有助于进一步研究中国的气候变化。

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  • 来源
    《Atmospheric research》 |2019年第4期|183-194|共12页
  • 作者

    Tan Xuejin; Wu Zhenni; Mu Xingmin; Gao Peng; Zhao Guangju; Sun Wenyi; Gu Chaojun;

  • 作者单位

    Northwest A&F Univ, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China;

    Northwest A&F Univ, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China;

    Northwest A&F Univ, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China|Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China;

    Northwest A&F Univ, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China|Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China;

    Northwest A&F Univ, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China|Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China;

    Northwest A&F Univ, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China|Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China;

    Northwest A&F Univ, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Mean daily snow depth; The number of snow cover days; Spatial-temporal variations; Trend; Abrupt changes; Precipitation; Temperature; China;

    机译：日平均积雪深度;积雪天数;时空变化;趋势;突变;降水;温度;中国;

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