Fast Warming Has Accelerated Snow Cover Loss during Spring and Summer across the Northern Hemisphere over the Past 52 Years (1967–2018)
Fast Warming Has Accelerated Snow Cover Loss during Spring and Summer across the Northern Hemisphere over the Past 52 Years (1967–2018)
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过去 52 年（1967 年至 2018 年），快速变暖加速了北半球春季和夏季的积雪流失
DOI：
10.3390/atmos11070728
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发表时间：
2020-07
期刊：
影响因子：
2.9
通讯作者：
Yinping Long
中科院分区：
文献类型：
--
作者：
Xuejiao Wu;Yongping Shen;Wei Zhang;Yinping Long
随着世界范围内积雪以几种令人担忧的方式变化，更详细地确定积雪的变率及其与持续气候变化的关系势在必行。本文利用美国国家海洋和大气管理局（NOAA）基于卫星的积雪覆盖范围（SCE）数据集，检测了北半球（NH） 1967-2018年期间的SCE变率及其与气候的联系。年际间，NH地区SCE在春季和夏季均呈现明显的下降趋势（分别为- 0.54和- 0.71万km2/ a），这种下降趋势与NH高纬度地区春季和夏季气温上升相对应。四季中，北半球的增温以冬季最高（0.39°C/ a, p < 0.01）。冬季降水增多与北半球中纬度地区冬季SCE增加密切相关。夏季降水以显著速率增加（1.1 mm/ 10年，p < 0.01），这可能是夏季SCE加速减少的原因。然而，SCE对温度变化的季节敏感性在欧亚大陆和北美大陆之间存在差异。因此，本研究对过去52年在区域和半球空间尺度上发生的季节SCE变化和气候变化提供了更好的理解。
With snow cover changing worldwide in several worrisome ways, it is imperative to determine both the variability in snow cover in greater detail and its relationship with ongoing climate change. Here, we used the satellite-based snow cover extent (SCE) dataset of National Oceanic and Atmospheric Administration (NOAA) to detect SCE variability and its linkages to climate over the 1967–2018 periods across the Northern Hemisphere (NH). Interannually, the time series of SCE across the NH reveal a substantial decline in both spring and summer (−0.54 and −0.71 million km2/decade, respectively), and this decreasing trend corresponded with rising spring and summer temperatures over high-latitude NH regions. Among the four seasons, the temperature rise over the NH was the highest in winter (0.39 °C/decade, p < 0.01). More precipitation in winter was closely related to an increase of winter SCE in mid-latitude areas of NH. Summer precipitation over the NH increased at a significant rate (1.1 mm/decade, p < 0.01), which likely contribute to the accelerated reduction of summer’s SCE across the NH. However, seasonal sensitivity of SCE to temperature changes differed between the Eurasian and North American continents. Thus, this study provides a better understanding of seasonal SCE variability and climatic changes that occurred at regional and hemispheric spatial scales in the past 52 years.
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影响因子：
3.8
作者：
J. Lawrimore;T. Karl;Michael F. Squires;D. Robinson;K. Kunkel
通讯作者：
J. Lawrimore;T. Karl;Michael F. Squires;D. Robinson;K. Kunkel
春季融雪速度减慢，北半球气候变暖
影响因子：
5.2
作者：
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影响因子：
4.9
作者：
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通讯作者：
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影响因子：
5.2
作者：
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通讯作者：
D. Robinson;K. Dewey
影响因子：
2.9
作者：
Lingxue Yu;Tingxian Liu;Shuwen Zhang
通讯作者：
Lingxue Yu;Tingxian Liu;Shuwen Zhang