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- W2474798924 abstract "Using the precipitation data of 224 stations in Southern China over the years of 1961-2010 and adopting the methods of linear regression analysis, multinomial fitting, EOF, Mann-Kendall and Glide T-examination etc., we ana- lyzed the spatial anomaly features and time evolution rule of the spring precipitation in Southern China. The results showed that: 1) spring precipitation in Southern China increased from west to east, and the high value of the centers is in eastern Guangdong-border area of Jiangxi and Fujian, while there is a dry tongue area in Northern Yunnan and Southern Sichuan. The presence of this dry tongue area may be an important reason leading to spring drought in south- west region. Spring precipitation was at a rate of 2.32 mm/10a which did not significantly decrease near 50 a. It in- creased in March and decreased in December and February; however, the three-month trend was not significant. Spring rainfall experienced a drop-down-drop fluctuation stage: it reduced during 1961-1963, increased during 1964-1975, and then decreased slowly. Spring rainfall was less than normal in 1960s, more than normal in 1970s-1980s, around the average in 1990s, and less than normal in 2000s. The stability of spring rainfall increased from north and south to cen- tral region. The largest variability of precipitation was in Yunnan-Southern Sichuan. 2) Spring precipitation decreased in most regions, but increased significantly in Northern Yunnan-Southwest Sichuan, and reduced significantly in Guiz- hou-Hunan. 3) Using the analysis of EOF method, we divide the abnormities of spring precipitation in Southern China into three common distributive modes: unanimous model of all areas, difference model of South-North and model of Yu nnan-Guizhou Plateau. This distribution may be related to wind anomaly over 850 hPa. 4) The highest value center of southern flood and drought frequency is in Yunnan-Southern Sichuan, and the second highest center is in south of the Five Ridges. The range of flood years is wider than that of drought years. In Northern Yunnan-Southern Sichuan, drought occurred mainly in 1960s, the late 1980s to the late 1990s, and the late 2000s, and flood occurred mainly in 1970s to 1980s, and the late 1990s to the middle 2000s." @default.
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- W2474798924 date "2014-01-01" @default.
- W2474798924 modified "2023-09-26" @default.
- W2474798924 title "A Study of the Climatic Anomaly of the Spring Precipitation in Southern China" @default.
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