Climate Characteristics of Daily Mean Temperature Below 10 ℃ in Guizhou Province from 1961 to 2021
Using daily mean temperature data from 82 national meteorological observation stations in Guizhou Province from 1961 to 2021,the spatiotemporal distribution characteristics of days with daily mean temperature below 10 ℃ are analyzed.The results show that the time period with daily mean temperature below 10 ℃ in Guizhou Province ranges mainly from late November to early March,showing a spatial distribution feature of more in the northwest and less in the south.The number of days with daily mean temperature below 10 ℃ in autumn,winter,and spring tends to decrease,with the fastest decrease occurring in spring.The average start(end)date with daily mean temperature below 10 ℃ is gradually delayed(advanced)from northwest to south.Since the late 1990s,the start(end)date have shown a significant tendency to be later(earlier).The mutation of annual days with daily mean temperature below 10 ℃ concentrated in the 1990s-2000s,showing a distribution pattern where the southern regions experienced mutations earlier than the northern regions.After the mutation,the number of days with daily mean temperature below 10 ℃ decreased significantly,with a significant decrease in the central region from east to west.There are significant oscillation periods of 10-12 years,4-6 years,and 3 years for annual days with daily mean temperature below 10 ℃ in Guizhou Province,with the oscillation period of 3 years being the most significant.The distribution of the number of days with daily mean temperature below 10 ℃ is not only influenced by altitude,but also by factors such as geographical location and weather system.
Guizhou Provincedaily mean temperature below 10℃variation characteristic
万方数据
维普
