Spatiotemporal Characteristics of Reference Crop Evapotranspiration in Inner Mongolia from 1959 to 2018

Spatiotemporal Characteristics of Reference Crop Evapotranspiration in Inner Mongolia from 1959 to 2018

To comprehensively understand the impact of climate change on reference crop evapotranspiration (ET<sub>0</sub>) in Inner Mongolia,the daily ET<sub>0</sub> of 50 meteorological stations in Inner Mongolia in the past 60 years was calculated using the FAO Penman-Monteith formul...

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Bibliographic Details
Main Authors: WANG Bin, QIAO Shuaishuai, LIU Jifa
Format: Article
Language:zho
Published: Editorial Office of Pearl River 2023-01-01
Series:Renmin Zhujiang
Subjects:
reference crop evapotranspiration
climate gradient
climate zone
Inner Mongolia
Online Access:http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2023.04.013
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Summary:To comprehensively understand the impact of climate change on reference crop evapotranspiration (ET<sub>0</sub>) in Inner Mongolia,the daily ET<sub>0</sub> of 50 meteorological stations in Inner Mongolia in the past 60 years was calculated using the FAO Penman-Monteith formula,and further investigated spatiotemporal characteristics,interdecadal and cyclical changes of ET<sub>0</sub> in Inner Mongolia.The results showed that the distribution trend of ET<sub>0</sub> gradually decreased from west to east in Inner Mongolia,the multi-year average was 1 018 mm,while the climate tilt rate was 4.2 mm/10a,showing a significant upward trend.The sum of ET<sub>0</sub> in spring,summer and autumn,the growing periods of crops,accounted for about 95% of the total annual value,while the spatial distribution was similar to the annual value.The annual average ET<sub>0</sub> in various climate zones followed a descending order:ultra-arid climate zone,arid climate zone,semi-arid climate zone,dry and semi-humid climate zone,humid and semi-humid climate zone.The variation coefficients of the climate zones were low,showing weak variability,and abrupt changes occurred in different climate zones at the end of the 1990s.The ET<sub>0</sub> change cycles were mainly 59a,14a and 24a.
ISSN:1001-9235

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