| 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,(1):174~178 |
| 甘肃省河东春小麦全生育期降水异常特征分析 |
| Characteristics of precipitation anomaly during whole growth period of spring wheat in the east of Yellow River in Gansu |
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| DOI：10.7606/j.issn.1000-7601.2006.01.37 |
| 中文关键词: 甘肃河东 春小麦全生育期 时空特征 Mahat小波分析 |
| 英文关键词:the east of Yellow River in Gansu whole growth period of spring wheat spatiotemporal characteristics Mahat wavelet analysis |
| 基金项目:科技部科研院所社会公益研究专项项目(2004DIB5J192)； 国家自然基金项目(40205014)； 甘肃省科学技术攻关计划项目(ZGS042-A44-017)； 干旱气象科学研究基金项目(IAM200414) |
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| 中文摘要: |
| 利用甘肃省河东31个测站1958~2001年历年春小麦全生育期(37月)的总降水量资料,通过EOF、REOF及M ahat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。 |
| 英文摘要: |
| 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(MarchJuly) 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. |
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