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Patterns in snow depth maximum and snow cover days during 1961-2015 period in the Tianshan Mountains, Central Asia

机译：1961-2015年中亚天山的最大积雪深度和积雪天数

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摘要

The patterns of snow accumulation and ablation were largely influenced by climate change. Current studies on the snow cover characteristics were mainly based on remote sensing retrievals in the Tianshan Mountains, however, they suffered from short record observations. This study quantified the climatology and variations in snowpack patterns related to snow depth from 1961 to 2015 at 48 meteorological stations across the Tianshan Mountains, spanning the elevations from 312 to 3543 m asl. Moreover, this study analyzed the contribution of the air temperature and precipitation during snow accumulation season to snow onset day, as well as the contribution of effective daily 0 degrees C accumulative temperature and snow depth maximum during snowmelt season to snow end day, respectively. The results showed that the snow depth maximum and snow cover days exhibited similar distribution, i.e., decreasing pattern in a northwest-to-southeast direction. Significant trend toward a shortened snow cover days was identified by 2.7 days decade(-1) at the high altitude of the north slope, although it exhibited a non-significant increasing trend in low-middle altitude regions. A higher snow depth maximum was observed mainly in the north slope by 2.08 cm decade(-1) without any significant elevation-dependency. There existed a positive sensitivity of snow onset day to air temperature with 0.64 days degrees C-1 during snow accumulation season, but an opposite sensitivity of snow end day to effective accumulative temperature with 0.82 days degrees C-1 during snow melt season. In addition, a positive sensitivity of snow end day to snow depth maximum was revealed with 1.84 days cm(-1) during snowmelt season.
机译：积雪和消融的方式在很大程度上受到气候变化的影响。当前关于积雪特征的研究主要基于天山的遥感反演，但是它们缺乏记录。这项研究量化了1961年至2015年天山跨48个气象站，跨越海拔312至3543 m的积雪与积雪深度相关的气候学和变化。此外，本研究分别分析了积雪季节的气温和降水对降雪开始日的影响，以及融雪季节有效日> 0℃的积雪和最大积雪深度对结雪日的影响。结果表明，最大雪深和积雪天数表现出相似的分布，即从西北向东南方向减小。在北坡高海拔地区，积雪天数缩短的显着趋势被确定为2.7天十年（-1），尽管在中低海拔地区却没有显着增加趋势。最高的雪深最大值主要出现在北坡2.08 cm十年（-1）上，没有任何明显的海拔依赖性。在积雪季节，起雪日对气温为0.64天C-1的气温具有正敏感性，而在积雪季节，结雪结束日对气温为C-1的有效积温的敏感性为0.82天C-1。此外，在融雪季节，积雪结束日对积雪最大深度的正敏感性为1.84天cm（-1）。

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  • 来源
    《Atmospheric research》 |2019年第11期|14-22|共9页
  • 作者

    Li Qian; Yang Tao; Zhou Hongfei; Li Lanhai;

  • 作者单位

    Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China;

    Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China|Chinese Acad Sci, Ili Stn Watershed Ecosyst Res, Urumqi 830011, Xinjiang, Peoples R China|CAS Res Ctr Ecol & Environm Cent Asia, Urumqi 830011, Xinjiang, Peoples R China|Chinese Acad Sci, Xinjiang Reg Ctr Resources & Environm Sci Instrum, Urumqi 830011, Xinjiang, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Snow depth; Snow cover days; Snow accumulation season; Snowmelt season; Effective accumulative temperature;

    机译：雪深;积雪天数;积雪季节;融雪季节;有效积温;

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