Title: Climatic Change of Sunshine Duration and Its Influencing Factors over Anhui Province during the Last 50 Years
Abstract:Using the data of sunshine duration and cloud amount,surface vapor pressure,precipitation and visibility from 80 stations across the Anhui Province from year 1955 to 2005,the annual,seasonal and month...Using the data of sunshine duration and cloud amount,surface vapor pressure,precipitation and visibility from 80 stations across the Anhui Province from year 1955 to 2005,the annual,seasonal and monthly trend and distribution variations of the sunshine duration are analyzed by using linear trend analysis and t-detected.The trend variation of meteorological factor of impacting on sunshine duration is analyzed.It was found that,the annual sunshine duration has shown a significant decreasing tendency during recent 50 years with a decreasing rate of 88.3h/10a.Except for no obvious trend in spring,the decreasing trend occurred in other seasons.Abrupt changes took place from the late 1960s to the early 1970s and in the late 1970s.Distribution of sunshine duration showed high in northern part and low in southern part.Except for increasing trend in Huaibei station,the decreasing trend occurred in other stations with the maximum decreasing trend in the western part of the Huaibei and the intermediate area of Huaihe River and Changjiang River.The decrease of sunshine duration is mainly caused by the significant increase in surface vapor pressure,precipitation,wet days and decreasing visibility.Visibility,surface vapor pressure,precipitation and cloud amount are factors influencing sunshine duration.The evolution of annual mean sum and low cloud amount in Anhui Province was shown to be insignificant and even in decline over the 45 years,exerting less influence on the decreasing trends in the annual sunshine duration.Read More
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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Cited By Count: 1
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