| 石家庄地区大风日数气候变化特征 |
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| 引用本文： | 阎访,岳艳霞,张秉祥,廖颖慧.石家庄地区大风日数气候变化特征[J].气象与环境学报,2013,29(2):81-88. |
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| 作者姓名： | 阎访 岳艳霞 张秉祥 廖颖慧 |
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| 作者单位： | 石家庄市气象局，河北 石家庄 050081 |
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| 基金项目： | 2010年度河北省气象局科研开发重点项目“农业气象预报服务系统”(10ky02)资助 |
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| 摘 要： | 以1972-2009年石家庄地区17个地面观测站大风资料为依据，运用线性倾向估计、Morlet小波分析、Mann-Kendall突变检验等方法对石家庄地区及5个代表站大风日数时空特征进行分析。结果表明：石家庄地区年平均大风日数空间上呈“几”字形分布；5个代表站大风日数气候特征一致：春天多，秋天少。石家庄市的大风日变化显著，白天出现大风的机率明显高于夜间，尤其是10-16时出现最多，占总次数的45.8%。石家庄地区及5个代表站均表现为20世纪70年代大风日数最多，近38 a来大风日数均呈线性减少趋势；同一年代不同区域的大风日数年代平均值存在明显差异。石家庄地区及5个代表站大风日数的周期性特征显著，各站的长、短周期内均处于大风日偏少期；石家庄地区及5个代表站中有4站的年大风日数发生了突变性减少。
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| 关 键 词： | 大风日数 时空分布 周期变化 突变检验 石家庄 |
Climatic characteristics of gale days in Shijiazhuang region |
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| YAN Fang,YUE Yan-xia,ZHANG Bing-xiang,LIAO Ying-hui.Climatic characteristics of gale days in Shijiazhuang region[J].Journal of Meteorology and Environment,2013,29(2):81-88. |
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| Authors: | YAN Fang YUE Yan-xia ZHANG Bing-xiang LIAO Ying-hui |
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| Institution: | Shijiazhuang Meteorological Service, Shijiazhuang 050081, China |
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| Abstract: | Based on the surface gale data at 17 weather stations in Shijiazhuang region from 1972 to 2009 ,temporal and spatial distribution characteristics of gale days in the study area and 5 representative stations were analyzed by methods of a linear regression, a Morlet wavelet analysis and a Mann-Kendall mutation test. The results show that the spatial distribution of annual mean gale days is a ＂low-high-low＂ shape. The climatic characters of gale days are consistent in five representative stations with higher frequency in spring and lower frequency in autumn. The daily variation of gale frequency is significant. The gale frequency is higher in daytime than in nighttime. The high- est frequency occurs between 10：00 and 16：00 accounting for about 45.8%. The high frequent gale days appear in 1970s in Shijiazhuang region,so is in five representative stations. However,the number of gale days in these re- gions is in decreasing trends in the recent 38 years. There is a significant difference in average of gale days in the different regions during the same decade. The cycle characteristics of the annual gale days were significant in Shiji- azhuang region and 5 representative stations, and the long and short cycles both appear during the few gale days. The annual gale day reduces mutationally in Shijiazhuang region and 4 reoresentative stations. |
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| Keywords: | Gale days Temporal and spatial distribution Cycle variation Mutation test Shijiazhuang |
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