Variation Characteristics of Surface Ground Temperature of Liaoning in Spring

doi:10.11924/j.issn.1000-6850.2014-2174

Abstract

Abstract: In order to reveal the relationship between the ground temperature and the other meteorological factors and summarized the variation of the ground temperature in spring, as a case study, the variation trend of ground temperature and its influencing meteorological factors are analyzed based on the data of daily mean ground temperature at 0-10 cm soil depths, mean air temperature, sunshine hours, solar radiation, average wind speed, vapor pressure, relative humidity and precipitation in Liaoning weather station from March to May in 1981-2010. The analysis was conducted with modern statistical diagnostic methods including the linear trend analysis, correlation analysis, regression analysis and factor analysis. The results showed that the difference between ground temperature and air temperature became smaller with the increase of the soil depth. The difference between ground temperature and air temperature in the central of Liaoning was relatively small. The result indicated: ground temperature in the west of Liaoning > ground temperature in the east of Liaoning > air temperature in Liaoning. There was a significant positive correlation between ground temperature and 8 kinds of meteorological factors. We should fully consider the influence of all these meteorological elements and landform and physiognomy features in spring ground temperature forecast.

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