| Characteristics and variation trend of precipitation in Xifeng |
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| DOI：10.16302/j.cnki.1000-7601.2015.01.019 |
| Key Words: precipitation trend variation Xifeng |
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| Abstract: |
| Based on the monthly precipitation data from Xifeng weather station between 1960 and 2010, the variation characteristics and trend of precipitation in Xifeng were analyzed. The results indicated that the overall annual precipitation was apparently in a decrease trend which was mainly caused by reduction of autumn precipitations. The changes were examined by methods including Mann-kendall test and moving t-test. The results found that clear abrupt change points in 1984, 1993 and 1976 could be detected. From then on, the annual precipitation, spring precipitation and autumn precipitation began to decline respectively. However, the winter precipitation began to ascend during 1970-2000, and precipitation during flood period began to decline from 1986 but ascend from 1988. |
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