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| 甘肃省河东春小麦全生育期降水异常特征分析 | |
| 引用本文： | 杨金虎,姚玉璧,吴胜安.甘肃省河东春小麦全生育期降水异常特征分析[J].干旱地区农业研究,2006,24(1):174-178. |
| 作者姓名： | 杨金虎 姚玉璧 吴胜安 |
| 作者单位： | 1. 南京信息工程大学大气科学系,江苏,南京,210044;甘肃定西气象局,甘肃,定西,743000 2. 甘肃定西气象局,甘肃,定西,743000 3. 海南省气象台,海南,海口,570203 |
| 基金项目： | 科技部社会公益研究项目;中国科学院资助项目;甘肃省科技攻关项目;甘肃省干旱气象科学研究项目 |
| 摘 要： | 利用甘肃省河东31个测站1958～2001年历年春小麦全生育期（3～7月）的总降水量资料，通过EOF、REOF及Mahat小波分析等方法，对甘肃河东主要雨养农业区春小麦全生育期降水异常的空间特征、时间变化进行了分析研究。结果表明，甘肃河东春小麦全生育期降水的主要空间异常型表现为一致的多雨或少雨型；降水异常区域大致可分为4个区，既甘肃中部区、陇东区、陇南区和甘肃南部区；降水主要表现为13～14年、3年左右和6～8年的周期振荡。 |
| 关 键 词： | 甘肃河东 春小麦全生育期 时空特征 Mahat小波分析 |
| 文章编号： | 1000-7600（2006）01-0174-05 |
| 收稿时间： | 2005-05-20 |
| 修稿时间： | 2005-05-20 |
Characteristics of precipitation anomaly during whole growth period of spring wheat in the east of Yellow River in Gansu |
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| YANG Jin-hu,YAO Yu-bi,WU Sheng-an.Characteristics of precipitation anomaly during whole growth period of spring wheat in the east of Yellow River in Gansu[J].Agricultural Research in the Arid Areas,2006,24(1):174-178. | |
| Authors: | YANG Jin-hu YAO Yu-bi WU Sheng-an |
| Institution: | 1. Department of Atmospheric Science, Nanjing University of Information Science and Technology, Nangjing 210044, China; 2. Dingxi Meteorological Bureau, Dingxi , Gansu 743000, China ; 3. Hainan Meteorological Observatory, Haikou 570203, China |
| Abstract: | With the methods of EOF,REOF and Mahat wavelet analysis,the features of spatial anomaly and time evolution tendency of precipitation during the whole duration of spring wheat(March~July) in the east of Yellow River in Gansu Province are studied,by using the precipitation data from 31 observational stations during 1958-2001.The results show that the main spatial anomaly structures are accordantly wet or dry in all areas.The precipitation anomaly region can be divided into four zones: the middle zone of Gansu,Longdong zone,Longnan zone,and the south zone of Gansu.The surging period of precipitation is discovered to be 13~14 years,3 years or so and 6~8 years. |
| Keywords: | the east of Yellow River in Gansu whole growth period of spring wheat spatio-temporal characteristics Mahat wavelet analysis |
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