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[1]AN Bin,XIAO Weiwei,ZHU Ni.Characteristics of Change in Diurnal Precipitation in the Loess Plateau During 1960—2017[J].Research of Soil and Water Conservation,2022,29(02):132-138+144.

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Characteristics of Change in Diurnal Precipitation in the Loess Plateau During 1960—2017

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 02 Page number: 132-138+144 Column: Public date: 2022-03-20

Title:: Characteristics of Change in Diurnal Precipitation in the Loess Plateau During 1960—2017

Author(s):: AN Bin^1,2,3, XIAO Weiwei^2,3, ZHU Ni¹; (1.School of Tourism & Environment, Ankang University, Ankang, Shaanxi 725000, China; 2.Engineering Technology Research Center for Water Resource Protection and Utilization of Hanjiang River, Ankang, Shaanxi 725000, China; 3.Academician Expert Workstation of Shaanxi Association for Science and Technology, Ankang, Shaanxi 725000, China)

Keywords:: diurnal precipitation; precipitation days; precipitation intensity; night-precipitation rate; Loess Plateau

CLC:: P426.6

DOI:: -

Abstract:: In order to explore the diurnal precipitation variation in the Loess Plateau under the background of climate warming and drying, we used the daily precipitation data of 55 meteorological stations from 1960 to 2017 to analyze the variation characteristics of inter-annual and rainy season(May-October)precipitation, precipitation days, precipitation intensity and night rain rate by using linear fitting and spatial analysis method. The results show that the precipitation and precipitation days of diurnal precipitation over the annual and rainy season decreased in the Loess Plateau, while the precipitation intensity showed an upward trend; the decrease range of precipitation and precipitation days over the years were higher than those in rainy season, and higher at night than those in daytime; the increase range of precipitation intensity over the years was lower than that in rainy season, and higher at night than that in daytime; the spatial pattern of diurnal precipitation indices in rainy season in Loess Plateau were obviously different; in rainy season, precipitation and precipitation intensity decreased from southeast to northwest; the number of precipitation days was more in southwest and northeast, less in northwest, and the number of night precipitation days was more in southwest and less in northwest; the average night precipitation rate over the years and in the rainy season were 50.44% and 50.34%, respectively; the rate of night rain was higher than 50% in the area of Shanxi-Henan border and the west of Liupan Mountain; it was rising in the west and the north central part of Shaanxi, Baotou to Hohhot and the east of Qilianshan Mountain, and declining in the middle and northeast of Shanxi, Yinchuan to Etuoke Banner of Inner Mongolia. In conclusion, there is no obvious night rain phenomenon in the Loess Plateau.

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Last Update: 2022-04-20