| 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 |
| Key Words: the east of Yellow River in Gansu whole growth period of spring wheat spatiotemporal characteristics Mahat wavelet analysis |
| Author Name | Affiliation | | YANG Jin-hu | Department of Atmospheric Science,Nanjing University of Information Science and Technology,Nanjing 210044,China；Dingxi Meteorological Bureau,Dingxi,Gansu 743000,China | | YAO Yu-bi | Dingxi Meteorological Bureau,Dingxi,Gansu 743000,China | | WU Sheng-an | Hainan Meteorological Observatory,Haikou 570203,China |
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| 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(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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