近49年来河北省干旱时空变化特征研究
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公益性行业(气象)科研专项(GYHY200906016)


Spatial-temporal characteristics analysis of drought in Hebei province in recent 49 years
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    摘要:

    基于河北省及邻近地区73个气象站1961—2009年逐季、年降水资料,应用降水Z指数、经验正交函数分解、小波分析等方法分析了河北省干旱的时空变化特征.结果表明:近49年来河北省年、各季的干旱空间分布特征,最常见的是全省一致的干旱(雨涝)型,其次是南涝(旱)北旱(涝)的南北相反分布型;小波分析方法得出年、各季干旱的出现不仅存在明显的年代际尺度变化,而且年际变化也显著;河北省年干旱指数呈下降趋势,1979年后,年干旱指数发生突变,该区域进入干旱期.

    Abstract:

    Based on seasonal and annual precipitation data from 73 meteorological stations during 1961—2009 in Hebei province and its vicinity,the spatial and temporal characteristics of drought are analyzed by the precipitation Z index,empirical orthogonal function and Morlet wavelet analysis method.The results show that uniform drought/flood is the most common pattern for the distribution of seasonal and annual drought in Hebei.The second pattern is a seesaw between southern and northern region,including flood in south with drought in north,and drought in south with flood in north.The emergence of seasonal and annual drought has obvious inter-decadal changes as well as significant inter-annual changes.In the recent 49 years,annual drought index in Hebei presented a downward trend.An abrupt change of annual drought index emerged after 1979 and the climate in the province has entered into dry period since then.

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王宏,余锦华,李宗涛.近49年来河北省干旱时空变化特征研究[J].南京信息工程大学学报(自然科学版),2015,7(3):260-267
WANG Hong, YU Jinhua, LI Zongtao. Spatial-temporal characteristics analysis of drought in Hebei province in recent 49 years[J]. Journal of Nanjing University of Information Science & Technology, 2015,7(3):260-267

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  • 收稿日期:2011-10-01
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  • 在线发布日期: 2015-06-26
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