1957~2022年沿河县气候变化特征分析
Analysis of Climate Change Characteristics in Yanhe County from 1957 to 2022

利用贵州省沿河县气象局自1957~2022年的气象资料，通过线性趋势拟合法，分析了沿河县近66年的气温、日照时数及降水量的变化特征。结果表明，沿河县年平均气温以0.148℃/10年的倾向率呈上升趋势，1997年是增温显著、增幅加速的转折点，冬、春季节回暖势头较为明显，秋季气温呈升高趋势。年日照时数以倾向率为？52.8 h/10年呈明显下降趋势。全年平均降水量气候倾向率达2.93 mm/10年，略呈上升态势，春季、秋季降水量均趋于下降，其中秋季降水量下降情况较为突出，达？8.5 mm/10年，但夏季、冬季降水量却有所上升。小雨日数减少明显，暴雨以上降水日数却有所增加。
Based on the meteorological data of Yanhe County Meteorological Bureau of Guizhou Province from 1957 to 2022, the variation characteristics of temperature, sunshine hours and precipitation in Yanhe County in the past 66 years were analyzed by linear trend fitting. The results showed that the annual average temperature in Yanhe County showed an upward trend with a tendency rate of 0.148？C/10 years, and 1997 was the turning point of significant warming and accelerated growth, with obvious warming momentum in winter and spring, and an increasing trend in autumn. The annual sunshine hours showed a significant downward trend with a tendency rate of ？52.8 h/10 years. The annual average precipitation climatic tendency rate was 2.93 mm/10 years, showing a slight upward trend, and the precipitation in spring and autumn tended to decrease, and the decline in autumn precipitation was more prominent, reaching ？8.5 mm/10 years, but the precipitation in summer and winter increased. The number of light rain days decreased significantly, but the number of precipitation days above heavy rain increased.