摘要
利用河北省冬麦区1971～2005年5月10日至6月10日逐日降水、气温、湿度、风速及1981～2005年逐年小麦千粒重等资料，采用小波分析、回归分析等统计方法，对冬麦区35年来干热风时空分布、周期等特征进行分析；同时还就河北省干热风对小麦千粒重的影响进行了初步分析。分析表明：轻度和重度干热风年平均发生日数分布具有一致性，而轻度和重度干热风的年代际变化等也具有相同特征，干热风总日数与小麦千粒重具有负相关关系。
By means of the data of daily precipitation, temperature, humidity, wind speed, and wind direction from 10 May to 10 June, 1971 to 2005 as well as thousand grain weight data of winter wheat from 1981 to 2005 in Hebei winter wheat production area, with the statistical methods, such as wavelet analysis, regression analysis, etc., the temporal-spatial distribution features, the variation periods of dry-hot wind and its impacts on thousand grain weight of winter wheat are analyzed. The results indicate that the annual mean number of mild dry-hot wind days is consistent with that of severe dry-hot wind days; the interdecadal variation of mild and severe dry-hot wind has same characteristics; the total number of dry-hot wind days has a negative correlation with the thousand grain weight of winter wheat.
出处
《气象科技》
2007年第5期699-702,共4页
Meteorological Science and Technology
基金
河北省科技攻关计划项目(01220602D)资助
关键词
干热风
小麦
千粒重
小波分析
dry-hot wind, thousand grain weight （TGW）, wavelet analysis
