| 大同市季节性冻土的分布与变化特征 |
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| 引用本文： | 李效珍,何正梅,韩登云,张凤翔. 大同市季节性冻土的分布与变化特征[J]. 中国农业气象, 2011, 0(Z1) |
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| 作者姓名： | 李效珍 何正梅 韩登云 张凤翔 |
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| 作者单位： | 山西省大同市气象局; |
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| 摘 要： | 利用大同市1961-2008年8个站点地面气象观测记录中的冻土资料,对大同市地面冻结日期、解冻日期、冻结日数及最大冻土深度的时空分布进行分析。结果表明:40多年来土壤开始冻结期呈推迟的趋势,土壤完全解冻期呈提前的趋势,地面冻结日数相应呈减少趋势,累年最大冻土深度自西北向东南逐渐减小,全市历年平均最大冻土深度变化总体上呈减少趋势,但2000年以后较20世纪60-80年代有增加的趋势。
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| 关 键 词： | 季节性冻土 分布 变化特征 |
Distribution and Variation Characteristics of Seasonal Frozen Soil in Datong City |
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| LI Xiao-zhen,HE Zheng-mei,HAN Deng-yun,ZHANG Feng-xiang. Distribution and Variation Characteristics of Seasonal Frozen Soil in Datong City[J]. Chinese Journal of Agrometeorology, 2011, 0(Z1) |
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| Authors: | LI Xiao-zhen HE Zheng-mei HAN Deng-yun ZHANG Feng-xiang |
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| Affiliation: | LI Xiao-zhen,HE Zheng-mei,HAN Deng-yun,ZHANG Feng-xiang (Bureau of Meteorology,Datong,Shanxi Province,Datong 037000,China) |
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| Abstract: | By using records of frozen soil collected from 8 surface weather observation sites in Datong from 1961 to 2008,the date of Datong ground freezing and thawing,the number of freezing days,and the spatial and temporal distribution of maximum depth of frozen soil are analyzed.The results showed that in recent 40 years the freezing date has a delaying trend while the thawing date is ahead of the recorded.The number of ground freezing days has a corresponding decreasing trend and maximum depth of frozen soil decr... |
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| Keywords: | Seasonal frozen soil Distribution Variation characteristics |
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