Characteristics of Temperature Change in Fuzhou City in Recent 63 Years
Based on the temperature data of meteorological observation station in Fuzhou from 1960 to 2022,the variation characteristics of temperature in Fuzhou in recent 63 years and its impact on agriculture were analyzed by linear regression,anomaly calculation and Mann-Kendall mutation test.The results showed that:(1)The average annual temperature in Fuzhou increased at a rate of 0.202℃/10 a.In the 1970s and 1980s,the temperature was significantly colder.Since the mid-1990s,the temperature has entered a significant warming period,and the annual average temperature change has not changed abruptly.(2)The annual extreme minimum temperature increased at a rate of 0.513℃/10 a.The number of regional low temperature freezing injury days in winter is 4.5 days per year,and the regional low temperature weather process is mainly continuous 2～5 days,accounting for 68.5%of the total number.(3)The annual extreme maximum temperature increased at a rate of 0.042℃/10 a.The highest number of high temperature weather days occurs in July,accounting for 41%of the total number of high temperature days,followed by August,accounting for 35.5%.The high temperature weather process mainly lasted for 3～5 days,accounting for 49.1%of the total number.(4)The frequency distribution of early rice heat-forced maturity is uneven.The northwest is the high value center,and the west and south are the low value areas.
TemperatureTrend analysisMutation testLow temperature and freezing injuryHeat-forced maturity
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