Spatial and Temporal Variation in Reference Evapotranspiration and Its Climatic Drivers in Northeast China
نویسندگان
چکیده
Reference evapotranspiration (ET0) is an important component of the global water cycle, and its long-term change directly influences regional supply demand balance. Under background change, investigating spatiotemporal trends in ET0 response to climate great importance for conservation rational utilization resources. Based on daily data from 91 meteorological stations during 1960–2017 Northeast China, this study calculated using Penman-Monteith method analyzed primary driving factors. The results show following: (1) During 1960–2017, annual China showed a nonsignificant upward trend at rate 1.45 mm/10a. A mutation point was detected 1993. From 1960 1993, experienced significant decrease (p < 0.1), while air temperature 0.01), which indicated appearance evaporation paradox. This because remarkable drop wind speed sunshine duration played role reduction ET0. 1994 2017, paradox disappeared. (2) significantly positively related altitude. In lower altitude regions (<500 m), generally decreased, higher areas (>500 displayed trend. (3) multiple regression analysis, relative humidity factor 1960–2017. At diverse altitudes, climatic factors influencing were different. high-altitude mainly influenced by humidity, low altitudes m).
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ژورنال
عنوان ژورنال: Water
سال: 2022
ISSN: ['2073-4441']
DOI: https://doi.org/10.3390/w14233911