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| Analysis on the change trend of the main climate elements in Qianxi City for 50 years |
| Luo Yu1, Wang Shengjiang1, Hu Yanyan2, Wu Shan3, Nie Xiang4 |
1. Qianxi Meteorological Bureau,Qianxi 551500;
2. Dafang Meteorological Bureau,Dafang 551600;
3. Qixingguan Meteorological Bureau,Bijie 551700;
4. Bjie Meteorological Bureau,Bijie 551700 |
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Abstract The paper takes the observation values of main meteorological elements at the National Basic Meteorological Station in Qianxi City from 1971 to 2020 as research data.Mathematical statistics,linear regression,5-year moving average,MK mutation test are used to analyze the interannual variation characteristics,anomaly values,climate tendency rate,and mutation test of meteorological elements such as average temperature,extreme maximum temperature,extreme minimum temperature,precipitation,average relative humidity,sunshine hours,evaporation,and average wind speed of 50 years.The results show that the average temperature,extreme maximum temperature,extreme minimum temperature,precipitation,average relative humidity,sunshine hours,evaporation,and average wind speed in Qianxi City from 1971 to 2020 were 14.82 ℃,32.79 ℃,-4.15 ℃,956.25 mm,81.08%,1 129.54 h,1 063.08 mm 1.31 m/s;The climate tendency rates were 0.026 ℃/a,0.033 ℃/a,0.04 ℃/a,-0.786 mm/a,-0.25%/a,-4.038 h/a,-11.243 mm/a,0.003 m/s/a.The trend of annual average temperature,extreme maximum temperature,and extreme minimum temperature showed a significant sudden increase in the early 21st century,and the precipitation in 2007,average relative humidity in 1977,sunshine hours in 1991,and evaporation in 1992 showed a plain decrease trend.The average wind speed over multiple years did not show a significant sudden change with the change of years.
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Received: 06 September 2023
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2024, Vol. 41 
