皖西南地区E601B型蒸发量日变化及影响因素分析

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中图分类号：P412.13 文献标志码：A 文章编号：2096-3599（2025）04-0116-07

DOI ： 10.19513/j.cnki.hyqxxb.20250428001

Analysis on daily variations and influencing factors of E601B evaporation in the southwest of Anhui Province

LIU Liqun'，WANG Xiaolan²， ZHENG Yan'，DONG Fangyou'，FANG Haitao³ （1.Anqing Meteorological Service，Anqing 24601，China；2. CMA Meteorological Observation Center，Beijing10081， China；3.Meteorological Observation Technology Support Center of Anhui，Hefei 23Oo31，China）

AbstractStudying the impact of temperature on evaporation observations at automatic meteorological stations is of great significance for climate change research and the assessment of meteorological drought disasters.The diurnal variation characteristics are analyzed using the hourly evaporation and temperature data from Anqing national basic meteorological station （hereinafter refered to as Anqing station）from April to November 2O17. The results are as follows.（1）The diurnal variation patterns of hourly evaporation and temperature are similar，both exhibiting one valleyand one peak，with the peak hourly evaporation occurring 3h later than that of the temperature.（2）Through the experimental research on the water temperature in evaporation measurements at Anqing station， it is found that after sunrise，the water temperature in the E6O1B evaporation pan rises，leading to an increase in volume.Combined with the influence of the operational software’sautomatic evaporation algorithm，it results in smaller measured hourly evaporation values in the morning but larger values from afternoon to evening on clear days. The analysis on the observation data from two typical warming days shows that the daily evaporation measurements are 7%-26% smaller，while the measurements from two systematic cooling processes are 15%-19% larger.（3）The complete correlation analysis of the hourly evaporation and related meteorological factors at Anqing and Taihu national basic meteorological stations in the southwest of Anhui Province indicates that the thermal factors are the primary drivers for the variations of hourly evaporation. The shallow ground temperatures at 10-20 cm have the most significant impact on hourly evaporation， with the ground temperature at 15cm showing the strongest correlation with hourly evaporation.

Keywordshourly evaporation；water temperature； ground temperature ；complete correlation coefficient

0 引言

1台站概况

下垫面的水分蒸发是水分循环的重要组成部分，蒸发量的变化研究对于深入了解气候变化规律以及水资源的规划设计和开发利用具有重要的参考价值[1-6]。（剩余9624字）