| 黄南南部近56年积雪变化分析研究 |
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| 引用本文： | 许显花,李延林,刘义花,等.黄南南部近56年积雪变化分析研究[J].高原山地气象研究,2016,36(4):65-70. |
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| 作者姓名： | 许显花 李延林 刘义花 等 |
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| 作者单位： | 1. 青海省同仁县气象局, 同仁 811399; |
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| 摘 要： | 选取青海东南部黄南区域范围内2个气象观测站近56a(1960~2015年)逐月积雪资料,利用数理统计和线性回归方法分析积雪的变化趋势,对黄南南部年积雪日数及最大雪深变化特征进行了诊断研究。结果表明:1)黄南南部积雪日数呈增加趋势,增加速率为0.152d/a;2)最大雪深春、冬季呈弱增加趋势,秋季呈弱减少趋势,总体呈弱减少趋势;3)黄南地区的积雪日数与最大雪深呈显著相关关系,一般雪深越大积雪日数就越长;4)年和各季积雪日数均发生了由少到多的突变,春季发生在1965年,秋季在1973年,冬季在1974年发生了突变,年突变发生于1970年;5)由小波分析可知,近56年来,黄南南部地区积雪日数6年的振荡周期比较明显外,在20世纪60~70年代末存在准3a振荡周期,其他周期信号强度都较弱。
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| 关 键 词： | 青海黄南 积雪 变化 分析研究 |
| 收稿时间： | 2016-09-20 |
Analysis on the Variation of Snow Cover in the South of Huangnan in the Last 56 Years |
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| Affiliation: | 1. Tongren Meteorological Service, Tongren 811399, China;2. Qinghai Provincial Key Laboratory of Disaster Prevention and Reduction, Xining 810001, China;3. Huangnan Meteorological Observatory, Tongren 811399, China;4. Qinghai Climate Center, Xining 810001, China;5. Huangnan Meteorological Service, Tongren 811399, China |
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| Abstract: | Selected in the southeastern Qinghai Huangnan region 2 meteorological stations 1960 ~ 2015 monthly snow data,using the mathematical statistics and the method of linear regression analysis of trends in the snow,of Southern Huangnan yearly snow days and the maximum snow depth change characteristics of diagnosis.Resultsshow that: 1) Southern Huangnan snow day number increased,the increase rate for 0.152/a.2) maximum snow depth in spring and winter is weakly increasing trend,autumn decreased slightly,the overall trend of weakly decreased. 3) Huangnan region of snow days and the maximum snow depth is significant correlation,snow is usually deeper snow days longer. 4) annual,quarterly and monthly number of snow cover days occurred from less to more mutations that occurred in spring in 1965,autumn in 1973,winter in 1974 mutations,the mutation years occurred in 1970. 5) by wavelet analysis,the last 56 years,the number of snow days in the southern region of Huangnan is more obvious than the 6 year period,there is a quasi 3A oscillation period in the end of 60 ~ 70 s,and other periodic signal intensity is weak. |
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