Processing And Characteristic Analysis Of Multi-station Meteorological Data In Xinjiang

Temperature,precipitable water and relative humidity meteorological parameters are important indicators of climate change and are closely related to people's lives.Under the background of global warming,Xinjiang is vulnerable to the changes of temperature,precipitable water and relative humidity because of its complex geographical form and changeable climate.Therefore,according to the statistical characteristics of 14 stations in Xinjiang,this paper achieves a unified data storage format of the stations,and effectively chooses and rejects the data,obtains reliable data information of the stations,compiles and implements the broadline generation software for meteorological parameters of Xinjiang stations.The trend analysis,catastrophe test and periodic change of temperature,precipitable water and relative humidity in Xinjiang during a specific period of time are carried out,and the following conclusions are drawn:1)From 1975 to 2017,the average temperature in the middle and lower stratosphere of the Xinjiang generally shows a downward trend,and the temperature drops sharply in the late 1990s;The average temperature in the troposphere shows an upward trend,and it decreases sharply in the mid-1980s.The time of abrupt change in the general troposphere region is earlier than that in the middle and lower stratosphere;At the same time,the extreme maximum temperature near the surface of northern and southern Xinjiang shows a downward trend on the whole;the extreme maximum temperature in southern Xinjiang decreases sharply in the early 21st century;the abrupt change in northern Xinjiang occurrs in the early 1980s;and the abrupt change in northern Xinjiang is earlier than that in southern Xinjiang on the whole.Moreover,the wavelet analysis shows that the mean temperature in the near-surface areas of the northern and southern Xinjiang has periods of 4a,6a,14a and 4a,7a,14a and 31a,respectively.The extreme minimum temperature in the near-surface areas of the northern and southern Xinjiang has periods of 4a,7a,26a and 5a,10a,18a and 26a,respectively.2)From 1975 to 2005,the average precipitable water and average relative humidity in Xinjiang show an overall upward trend,and the average precipitable water and relative humidity of each station change abruptly from the early 1980s to the late 1990s.Meanwhile,the average precipitable water in southern Xinjiang increases sharply in the late 1980s,and in northern Xinjiang it increases sharply in the early 1990s.Earlier than northern Xinjiang.The average relative humidity has diurnal difference.The growth rate of average relative humidity during daytime in southern Xinjiang is higher than that at night,while that in northern Xinjiang is opposite.At the same time,the wavelet analysis shows that the average precipitable water in northern and southern Xinjiang has a periods of 9a,14a,26a and 8a,15a and 26a,respectively;the average relative humidity in the daytime in northern and southern Xinjiang has a periods of 6a,10a,15a,22a and 7a,12a and 21 a,respectively,and at night there are periods of 9a,22a and 4a,7a,13 A and 26a,respectively.3)By exploring the response relationship between temperature,precipitation and relative humidity in Xinjiang from 1975 to 2005,it is found that under the condition of atmospheric pressure of 500-850 hpa,there is a significant positive correlation between high-altitude temperature and average precipitable water,while in the near-surface area,there is a positive correlation between temperature and average precipitable water in northern Xinjiang.Meanwhile,the average temperature and average relative humidity are negatively correlated in the middle and lower stratosphere and near the surface,and positively correlated in the troposphere.