Variation Characteristics and Influencing Factors of Reference Crop Evapotranspiration in Guangdong Province under Climate Change
To explore the temporal and spatial variation characteristics of reference crop evapotranspiration (ET<sub>0</sub>) in Guangdong Province under climate change and its influencing factors,based on the surface observation data of 37 meteorological stations in Guangdong Province during 1980...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2023-01-01
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| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2023.12.004 |
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| Summary: | To explore the temporal and spatial variation characteristics of reference crop evapotranspiration (ET<sub>0</sub>) in Guangdong Province under climate change and its influencing factors,based on the surface observation data of 37 meteorological stations in Guangdong Province during 1980—2020,the FAO-56 Penman-Monteith method was applied to calculate the daily ET<sub>0</sub> of each meteorological station.In addition,this research systematically analyzed the temporal and spatial variation characteristics of ET<sub>0</sub> in Guangdong Province and quantitatively studied the influence degree of various meteorological factors on ET<sub>0</sub> by using sensitivity and contribution rate analysis methods.The results show that in terms of time scale,the annual average ET<sub>0</sub> in Guangdong Province is 1 150 mm,and it shows a significant increasing trend at the rate of 14.84 mm/10a.In terms of spatial scale,ET<sub>0</sub> in Guangdong Province shows an increasing trend from north to south,with a variation range of 1 069~1 235 mm.ET<sub>0</sub> is more sensitive to relative humidity and temperature than sunshine duration and wind speed.The contribution rate analysis shows that temperature is the dominant factor for ET<sub>0</sub> variation in Guangdong Province,followed by sunshine duration,relative humidity,and wind speed.The potential increase in temperature combined with the decrease in relative humidity can lead to higher ET<sub>0</sub> and drought events in the future.This study can provide a scientific basis for water resources planning and agricultural irrigation management in Guangdong Province. |
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| ISSN: | 1001-9235 |