华北地区冬小麦干旱时空分布特征  

Temporal and spatial distribution of drought for winter wheat in north China

作　　者：吴东丽[1,2] 王春乙[2] 薛红喜[1] 张雪芬[1] 

机构地区：[1]中国气象局气象探测中心,北京100081 [2]中国气象科学研究院,北京100081

出　　处：《自然灾害学报》2012年第1期18-25,共8页Journal of Natural Disasters

基　　金：国家自然科学基金项目(30771248);国家"十一五"科技支撑计划重点项目(2006BAD04B09)

摘　　要：根据作物气候指标距平,利用经验正交函数和小波分析方法,研究了华北地区冬小麦干旱的空间分布和时间演变特征。研究结果表明,主要有3种空间分布类型:以中西部为中心的全区一致型;西北、东南相反分布型,其正值中心分布在北京、霸州等区域,负值中心分布在济南、淄川、临沂等区域;东、西相反分布型,其正值中心分布在河北省东北部的唐山、秦皇岛和山东省的烟台、福山、海阳为等区域,负值中心分布在河北省的邢台、石家庄以及河南省的安阳和新乡等区域;3种空间分布型时间系数变化趋势都表明,20世纪90年代以后华北地区冬小麦干旱呈加重的趋势。Based on crop climate index anomaly data, the spatiotemporal features and changes of drought for winter wheat in north China were analyzed using the empirical orthogonal function（EOF） and wavelet analysis methods. The results show that there are three typical distribution patterns of drought for winter wheat in north China, which are： the ＂all region consistency＂ type centering the west-midst in north China, the ＂northwest-southeast contrary＂ type, with the positive value centering Beijing, Bazhou, et al. and the negative value centering Jinan, Zichuan, Linyi, et al. , and the ＂west-east contrary＂ type with the positive value centering Tangshan , Qinhuangdao in Hebei Province and Yantai, Fushan, Haiyang in Shandong Province, and the negative value centering Xingtai, Shijiangzhuang, Anyang in Hebei Province, and Xinxiang in Henan Province. The analysis of time coefficients of the three spatial distribution modes of drought all show that drought has an increasing tendency since 1990s.

关 键 词：作物气候指标距平 时空分布特征 经验正交函数 小波分析 

分 类 号：S423[农业科学—植物保护]