Spatial distribution of potential evapotranspiration trends in the Inner Mongolia Autonomous Region (1971–2016)

Bian, Yuming; Dai, Haiyan; Zhang, Qiuliang; Yang, Liping; Du, Wala

doi:10.1007/s00704-020-03154-y

Cited by 24 publications

(20 citation statements)

References 44 publications

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“…McVicar et al [71], based on a review of 148 studies carried out around the world, noted an average decrease in wind speed of −0.017 m year −1 . The decrease in solar radiation found in this study has also been observed in Mongolia [72] and in the Yangsu and Lijiang basins in China [13,56].…”

Section: Trend Of Annual and Seasonal Climatic Variablessupporting

confidence: 84%

“…This paradox is more visible in the Sahelian zone where the high temperatures should be accompanied by a generalized increase in evapotranspiration. This phenomenon has recently been observed by Bian et al [72] in arid and semi-arid areas of Mongolia.…”

Section: Trend Of Annual and Seasonal Climatic Variablessupporting

confidence: 67%

“…For them, the decrease in the duration of sunshine and the wind speed are the main causes of the decrease in evapotranspiration. Bian et al [72] also noted that wind speed and radiation are the main factors behind the decline in ET 0 in Mongolia. This phenomenon of declining evapotranspiration despite an increase in temperature is called the "evaporation paradox".…”

Section: Trend Of Annual and Seasonal Climatic Variablesmentioning

confidence: 96%

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Trend and Sensitivity Analysis of Reference Evapotranspiration in the Senegal River Basin Using NASA Meteorological Data

Ndiaye

Bodian

Diop

et al. 2020

Water

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Understanding evapotranspiration and its long-term trends is essential for water cycle studies, modeling and for water uses. Spatial and temporal analysis of evapotranspiration is therefore important for the management of water resources, particularly in the context of climate change. The objective of this study is to analyze the trend of reference evapotranspiration (ET0) as well as its sensitivity to climatic variables in the Senegal River basin. Mann-Kendall’s test and Sen’s slope were used to detect trends and amplitude changes in ET0 and climatic variables that most influence ET0. Results show a significant increase in annual ET0 for 32% of the watershed area over the 1984–2017 period. A significant decrease in annual ET0 is observed for less than 1% of the basin area, mainly in the Sahelian zone. On a seasonal scale, ET0 increases significantly for 32% of the basin area during the dry season and decreases significantly for 4% of the basin during the rainy season. Annual maximum, minimum temperatures and relative humidity increase significantly for 68%, 81% and 37% of the basin, respectively. However, a significant decrease in wind speed is noted in the Sahelian part of the basin. The wind speed decrease and relative humidity increase lead to the decrease in ET0 and highlight a “paradox of evaporation” in the Sahelian part of the Senegal River basin. Sensitivity analysis reveals that, in the Senegal River basin, ET0 is more sensitive to relative humidity, maximum temperature and solar radiation.

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Section: Trend Of Annual and Seasonal Climatic Variablessupporting

confidence: 84%

Section: Trend Of Annual and Seasonal Climatic Variablessupporting

confidence: 67%

Section: Trend Of Annual and Seasonal Climatic Variablesmentioning

confidence: 96%

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Trend and Sensitivity Analysis of Reference Evapotranspiration in the Senegal River Basin Using NASA Meteorological Data

Ndiaye

Bodian

Diop

et al. 2020

Water

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“…Increasing ET originating from increasing temperature may seem to be generally consistent with the status of global warming. However, many studies have shown that ET has decreased over the past decades in many places in the world and the 'Evaporation Paradox' is a widely discussed occurrence with an extensive number of studies (Chattopadhyay and Hulme, 1997;Roderick and Farquhar, 2002;Zhang et al, 2011;Tabari et al, 2012;Wang et al, 2017a;Feng et al, 2018;Bian et al, 2020). These studies indicate that increases in aerosol and cloud thickness caused by human activities are the main driving force for the decreases in solar radiation and ET.…”

Section: Reasons For Spatiotemporal Distribution Of Etmentioning

confidence: 99%

Simulation of Evapotranspiration Based on BEPS-TerrainLab V2.0 from 1990 to 2018 in the Dajiuhu Basin

Zhang

Liu

et al. 2020

Chin. Geogr. Sci.

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Accurate estimations of evapotranspiration (ET) are essential for understanding land-atmosphere coupling and atmosphere-underlying surface energy and water vapor exchanges. Based on input data processing, this paper simulates the temporal and spatial variation of ET in the Dajiuhu Basin from 1990 to 2018 using the BEPS-TerrainLab V2.0 model. Compared with the ET measured by an eddy covariance (EC) tower, the model explained 80.1% of the ET variation. From 1990 to 2018, the average annual ET in the Dajiuhu Basin was 1262.7 mm/yr indicating a downward trend (-27.12 mm/yr). In 2005, a sudden change point was observed based on the Mann-Kendall (MK) test and 3-year moving t-test. Around 2005, the downward trend in ET slowed and the proportional trend of ET to precipitation changed from upward trend to downward trend. Regarding spatial distribution, the ET in the basin's central part was smaller than that in the basin's surrounding area, the ET of the southern slope was higher than that of the northern slope, and the decrease in the ET rate on the sunny side was lower than that on the shady side. ET decreased as the elevation increased, with the fastest decrease observed between 2184 and 2384 m. For different landcover types, the average ET exhibited the following order: deciduous forest > mixed forest > wetland > grass > agriculture land. Decreased solar radiation is the main reason for the decreased ET in the Dajiuhu Basin, followed by increased wind speed and relative humidity, which together contribute 83.9% to the ET trend. This paper provides a theoretical basis for the study of ET changes and the mechanism of ET and provides a decision-making reference for water resource management in the Dajiuhu Basin and even the South-to-North Water Transfer Project.

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“…Analyzing the observed trends in 0 can provide considerable insight into current climate change and the influence that this change may have on agricultural and water resources [42][43][44][45]. Various studies have confirmed an increase in the 0 under climate change scenarios [46][47][48][49][50][51][52]. Thomas (2000) analyzed trends using the Penman-Monteith 0 estimates from 1954-1993 at 65 stations in mainland of China and Tibet [53].…”

Section: Introductionmentioning

confidence: 99%

Climate Change Impacts on Reference Evapotranspiration in South Korea Over the Recent 100 Years (1904–2018)

Jeon

Nam

Young-Sik

et al. 2021

Preprint

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Damage due to climate change is increasing worldwide; in South Korea, the increase in temperature is greater than the average global temperature increase. These changes in temperature have increased the frequency of and damage caused by droughts. To reduce drought damage, the importance of efficient water management policies and evapotranspiration, an index used for water management policies, is increasing. Analyzing the variation in evapotranspiration is relevant to understanding climate change and agricultural water management. Owing to the lack of evapotranspiration data collected using a Lysimeter, evapotranspiration has been estimated using the FAO-56 Penman–Monteith (PM) equation on meteorological datasets as recommended by the United Nations Food and Agriculture Organization. Long-term meteorological data with a maximum of 100 years were collected from 12 sites to estimate evapotranspiration. The objectives of this study were the following: (1) estimate evapotranspiration based on the PM equation, (2) analyze the trends in temperature and evapotranspiration, and (3) evaluate the relationship between temperature and evapotranspiration through correlational analysis. The results improve our understanding of climate change and provide a valuable reference for regional water resource management. We estimated evapotranspiration and analyzed the tendency of temperature and evapotranspiration. As a result, analysis of seasonal ET0 at all stations represented generally increasing trends in spring, summer, and autumn with generally decreasing trends in winter. Results of the seasonal Mann–Kendall test between temperature metrics (maximum, average, minimum) and ET0 showed that the maximum temperature exhibited a distinct increase in spring and winter in some areas. In this study, we determined the strength of the relationship between temperature and ET0 using the Pearson correlation coefficient. The results of evaluating the relationship between each temperature metric and evapotranspiration showed that the maximum temperature had the strongest relationship compared to the average and minimum temperatures.

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Spatial distribution of potential evapotranspiration trends in the Inner Mongolia Autonomous Region (1971–2016)

Cited by 24 publications

References 44 publications

Trend and Sensitivity Analysis of Reference Evapotranspiration in the Senegal River Basin Using NASA Meteorological Data

Trend and Sensitivity Analysis of Reference Evapotranspiration in the Senegal River Basin Using NASA Meteorological Data

Simulation of Evapotranspiration Based on BEPS-TerrainLab V2.0 from 1990 to 2018 in the Dajiuhu Basin

Climate Change Impacts on Reference Evapotranspiration in South Korea Over the Recent 100 Years (1904–2018)

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