Increasing Trend of Pan Evaporation over the Semiarid Loess Plateau under a Warming Climate

Qiang, Zhang; Wang, Wenyu; Wang, Sheng; Zhang, Liang

doi:10.1175/jamc-d-16-0041.1

Cited by 23 publications

(14 citation statements)

References 30 publications

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“…The same phenomenon has been found in many parts of India, Australia, and China [19][20][21]. Some scholars have also found that the phenomenon of the evaporation paradox is obviously regional and seasonal, which makes the research on the trend of evapotranspiration continue to increase [22][23][24].…”

Section: Introductionsupporting

confidence: 58%

Variation in Reference Evapotranspiration over the Tibetan Plateau during 1961–2017: Spatiotemporal Variations, Future Trends and Links to Other Climatic Factors

Liu

Wang

Yao

et al. 2020

Water

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Reference evapotranspiration (ET0) is a key factor in the hydrological cycle and energy cycle. In the context of rapid climate change, studying the dynamic changes in ET0 in the Tibetan Plateau (TP) is of great significance for water resource management in Asian countries. This study uses the Penman–Monteith formula to calculate the daily ET0 of the TP and subsequently uses the Mann–Kendall (MK) test, cumulative anomaly curve, and sliding t-test to identify abrupt change points. Morlet wavelet analysis and the Hurst index based on rescaled range analysis (R/S) are utilized to predict the future trends of ET0. The Spearman correlation coefficient is used to explore the relationship between ET0 changes and other climate factors. The results show that the ET0 on the TP exhibited an increasing trend from 1961 to 2017, with the most significant increase occurring in winter; an abrupt change to a tendency to decrease occurred in 1988, and another abrupt change to a tendency to increase occurred in 2005. Spatially, the ET0 of the TP shows an increasing trend from east to west. The change trend of the ET0 on the TP will not be sustainable into the future. In addition, the mean temperature has the greatest impact on the ET0 changes in the TP.

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Section: Introductionsupporting

confidence: 58%

Variation in Reference Evapotranspiration over the Tibetan Plateau during 1961–2017: Spatiotemporal Variations, Future Trends and Links to Other Climatic Factors

Liu

Wang

Yao

et al. 2020

Water

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“…2021, 11, 8013 2 of 14 trends in ET 0 in the Yellow River and the reduction of wind speed was the major driving force for decreasing trends. However, in recent years, increased ET 0 has been found in some regions, such as India and China [19]. Investigating long term change in ET 0 over India's humid tropical Narmada River watershed, Pandey et al [20] found an increasing trend in ET 0 .…”

Section: Introductionmentioning

confidence: 99%

Spatio-Temporal Variation of Reference Evapotranspiration and Its Climatic Drivers over the Tibetan Plateau during 1970–2018

Gao

Zuyi

et al. 2021

Applied Sciences

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Reference evapotranspiration (ET0) is a key component of hydrologic cycle and it is important for water resources management. Analysis of ET0 changes is particularly critical for understanding the impacts of climatic change on hydrology in ecologically fragile regions. In this study, using the Penman–Monteith method and the Mann–Kendall test, the variation characteristics of ET0 on the Tibetan Plateau (TP) from 1970 to 2018 was analyzed, and the dominant climatic factors controlling the change of ET0 was also explored. The result shows that in TP region: (1) there was an abrupt change in the trend of ET0 around 1997, and the ET0 declined at a rate of −25.9 mm/decade during 1970–1996 but increased by 31.1 mm/decade during 1997–2018; (2) ET0 is most sensitive to solar radiation, then relative humidity, wind speed and mean temperature; (3) the decrease of ET0 before 1997 was mainly due to the decline of wind speed and the increase of relative humidity, while the increase of ET0 after 1997 was mainly due to the decrease of relative humidity. The results of this study can provide data reference for the research of water balance on the TP.

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“…The decrease in pan evaporation associated with the increasing air temperatures is called the "Pan Evaporation Paradox" [29]. Studies conducted in semi-arid regions point out that the combined contribution of cloud cover and relative humidity on pan evaporation is greater than that of temperature [30]. Thus, increased cloud cover offsets the increased pan evaporation because of temperature increase and relative humidity decrease.…”

Section: Discussionmentioning

confidence: 99%

Trend Analyses of Meteorological Variables and Lake Levels for Two Shallow Lakes in Central Turkey

Yağbasan

Demir

Yazıcıgil

2020

Water

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Trend analyses of meteorological variables play an important role in assessing the long-term changes in water levels for sustainable management of shallow lakes that are extremely vulnerable to climatic variations. Lake Mogan and Lake Eymir are shallow lakes offering aesthetic, recreational, and ecological resources. Trend analyses of monthly water levels and meteorological variables affecting lake levels were done by the Mann-Kendall (MK), Modified Mann-Kendall (MMK), Sen Trend (ST), and Linear trend (LT) methods. Trend analyses of monthly lake levels for both lakes revealed an increasing trend with the Mann-Kendall, Linear, and Sen Trend tests. The Modified Mann-Kendall test results were statistically significant with an increasing trend for Eymir lake levels, but they were insignificant for Mogan lake due to the presence of autocorrelation. While trend analyses of meteorological variables by Sen Test were significant at all tested variables and confidence levels, Mann-Kendall, Modified Mann-Kendall, and Linear trend provided significant trends for only humidity and wind speed. The trend analyses of Sen Test gave increasing trends for temperature, wind speed, cloud cover, and precipitation; and decreasing trends for humidity, sunshine duration, and pan evaporation. These results show that increasing precipitation and decreasing pan evaporation resulted in increasing lake levels. The results further demonstrated an inverse relationship between the trends of air temperature and pan evaporation, pointing to an apparent “Evaporation Paradox”, also observed in other locations. However, the increased cloud cover happens to offset the effects of increased temperature and decreased humidity on pan evaporation. Thus, all relevant factors affecting pan evaporation should be considered to explain seemingly paradoxical observations.

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Increasing Trend of Pan Evaporation over the Semiarid Loess Plateau under a Warming Climate

Cited by 23 publications

References 30 publications

Variation in Reference Evapotranspiration over the Tibetan Plateau during 1961–2017: Spatiotemporal Variations, Future Trends and Links to Other Climatic Factors

Variation in Reference Evapotranspiration over the Tibetan Plateau during 1961–2017: Spatiotemporal Variations, Future Trends and Links to Other Climatic Factors

Spatio-Temporal Variation of Reference Evapotranspiration and Its Climatic Drivers over the Tibetan Plateau during 1970–2018

Trend Analyses of Meteorological Variables and Lake Levels for Two Shallow Lakes in Central Turkey

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