Reference evapotranspiration change and its sensitivity to climate variables in southwest China

Liu, Tiegang; Li, Longguo; Lai, Jiameng; Liu, Chao; Zhuang, Wenhua

doi:10.1007/s00704-015-1526-7

Cited by 46 publications

(40 citation statements)

References 34 publications

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“…Over a 116-year period , Irmak et al [11] found a significant decrease in ET 0 in the Platte river basin, USA. The same declining trends were also found in other regions throughout the world, such as New Zealand (from the 1970s to the early 2000s), India , and parts of China [12][13][14]. However, an increasing trend in ET 0 was identified in other regions from the 1960s to early 2000s, such as Iran , Northern Eurasia , and parts of Romania (1961Romania ( -2007 [3,15,16].…”

Section: Introductionsupporting

confidence: 65%

“…There, the sensitivity analyses for changes in the annual ET 0 showed that Ave RH and Max T were the most sensitive climate variables over the whole Songnen Grassland, which was in agreement with Yin et al [44], who studied all of China during 1961-2008. However, Liu et al [14] has reported that Win S and Sun H were the most sensitive factors in other parts of China. Therefore, it can be concluded that ET 0 has different responses to climate variables in different regions and under different climate conditions.…”

Section: Discussionmentioning

confidence: 98%

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Changes of Reference Evapotranspiration and Its Relationship to Dry/Wet Conditions Based on the Aridity Index in the Songnen Grassland, Northeast China

Zhang

Sun

et al. 2017

Water

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Abstract:Reference evapotranspiration (ET 0 ) plays an important role in regional dry/wet conditions. Based on the Food and Agriculture Organization of the United (FAO) Penman-Monteith method and daily climate variables, ET 0 was calculated for 21 stations in and around the Songnen Grassland, northeast China, during 1960China, during -2014. The temporal and spatial variations of ET 0 and precipitation (P) were analyzed in the annual, seasonal, and growing season (from April to October) time series using the Mann-Kendall test, Sen's slope estimator, and linear regression coupled with a break trend analysis. A sensitivity analysis was used to detect the key climate parameter contributing to ET 0 change. By linear regression analysis on the relationship between ET 0 , P, and the aridity index (AI), the role of ET 0 in determining regional wet/dry conditions was analyzed. Results show a higher ET 0 in the southwest and a lower ET 0 in the northeast, but P was opposite to that of ET 0 . Evident decreasing trends of ET 0 in the annual, seasonal, and growing season time series were detected in almost the entire region by the trend analysis methods. For the entire region, the decreasing trend of ET 0 can be linked to the relative humidity and maximum air temperature. The positive contribution of increasing temperature to ET 0 was offset by the effect of the significantly decreasing relative humidity, wind speed, and sunshine duration at the 0.05 level during 1960-2014. In addition, the value of ET 0 was higher in drought years and lower in wet years.

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Section: Introductionsupporting

confidence: 65%

Section: Discussionmentioning

confidence: 98%

Changes of Reference Evapotranspiration and Its Relationship to Dry/Wet Conditions Based on the Aridity Index in the Songnen Grassland, Northeast China

Zhang

Sun

et al. 2017

Water

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“…Many studies have focused on spatial and temporal variations in ET 0 as well as the driving climate factors in different climatic regimes. Numerous studies have found different ET 0 trends in different regions globally, including North America, Africa, India, Argentina, Australia, Western Europe, and China (Donohue et al, ; Jhajharia et al, ; Terink et al, ; La Casa and Ovando, ; Zhao et al, ; Liu et al, ; Onyutha, ; Wang et al, ). Globally, ET 0 is decreasing, with the majority of these trends observed in Australia (Donohue et al, ), northeast India (Jhajharia et al, ), the United States (Irmak et al, ), southeast Turkey (Ozdogan and Salvucci, ), and northwest Bangladesh (Mojid et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al . () show that WS is the largest contributor to ET 0 variability, followed by Ta, SD, and RH in southwest China. Shan et al .…”

Section: Introductionmentioning

confidence: 99%

Effects of large‐scale climate anomalies on crop reference evapotranspiration in the main grain‐production area of China

Liu

Huang

Wang

2018

Intl Journal of Climatology

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Crop reference evapotranspiration (ET0), which connects the energy and water balance, is an important indicator used in water resource management and agricultural production. On the basis of daily meteorological data from 479 observation stations, we investigate changes in ET0 and associated climate factors across the main grain‐producing area (MGPA) of China from 1960 to 2015. The Mann–Kendall test and Sen's slope estimator were applied to detect trends in ET0, and regression analyses and composite analyses were used to evaluate the contributions of climatic variables and large‐scale anomalies that may affect ET0. The results of this study show that ET0 in the MGPA decreased (−2.67 mm/decade) during summer throughout the past 56 years, and that this change is largely attributable to decreased sunshine duration and wind speed (WS). Furthermore, decreased WSs in the 850‐hpa geostrophic wind field, are responsible for decreases in ET0 in Northeast China Region (−1.85 mm/decade), which affect ET0 by significantly weakening the observed surface WS. Meanwhile, significant low cloud cover variations accounted for the decrease in ET0 in the Huang‐Huai‐Hai Region (−7.85 mm/decade), Loess Plateau Region (−2.91 mm/decade), Yangtze River Region (−3.96 mm/decade), and Southwest China Region (−2.71 mm/decade). However, decreases in the integrated atmospheric water vapour content (IWVC), which act to weaken the surface relative humidity, are hypothesised to increase ET0 in the South China Region (1.25 mm/decade).

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“…Liu et al . () analysed annual PET trends for individual stations and the entire study area during 1960–2010. Sun et al .…”

Section: Introductionmentioning

confidence: 99%

Long‐term change of potential evapotranspiration over southwest China and teleconnections with large‐scale climate anomalies

Liu

Chen

2017

Intl Journal of Climatology

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Potential evapotranspiration (PET) is a sensitive factor for atmospheric and ecological systems over southwest China which is characterized by intensive karst geomorphology and fragile environment. Based on daily meteorological data of 94 stations during 1961–2013, the spatiotemporal characteristics of PET are analysed. The changing characteristics of local meteorological factors and large‐scale climatic features are also investigated to explain the potential reasons for changing PET. Study results are as follows: (1) The high‐value centre of PET with a mean value of 1097 mm a−1 locates in the south mainly resulted from the regional climatic features of higher air temperature (TEM), sunshine duration (SSD) and lower relative humidity (RHU), and the low‐value centre of PET with a mean value of 831 mm a−1 is in the northeast primarily attributed to higher RHU and weaker SSD. (2) Annual PET decreases at −10.04 mm decade−1 before the year 2000 but increases at 50.65 mm decade−1 thereafter, and the dominant factors of PET change are SSD, RHU and wind speed (WIN), with the relative contributions of 33.29, 25.42 and 22.16%, respectively. (3) The abrupt change of PET in 2000 is strongly dominated by large‐scale climatic anomalies. The strengthened 850 hPa geostrophic wind (0.51 m s−1 decade−1), weakened total cloud cover (−2.25% decade−1) and 500 hPa water vapour flux (−2.85% decade−1) have provided advantageous dynamic, thermal and dry conditions for PET over southwest China since the 21st century.

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Reference evapotranspiration change and its sensitivity to climate variables in southwest China

Cited by 46 publications

References 34 publications

Changes of Reference Evapotranspiration and Its Relationship to Dry/Wet Conditions Based on the Aridity Index in the Songnen Grassland, Northeast China

Changes of Reference Evapotranspiration and Its Relationship to Dry/Wet Conditions Based on the Aridity Index in the Songnen Grassland, Northeast China

Effects of large‐scale climate anomalies on crop reference evapotranspiration in the main grain‐production area of China

Long‐term change of potential evapotranspiration over southwest China and teleconnections with large‐scale climate anomalies

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