Spatiotemporal variation of reference evapotranspiration during 1954–2013 in Southwest China

Feng, Yu; Cui, Ningbo; Zhao, Lu; Gong, Daozhi; Zhang, Kuandi

doi:10.1016/j.quaint.2017.01.023

Cited by 45 publications

(20 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Despite the availability of numerous estimation methods, the Penman Monteith reference evapotranspiration method is the most accurate and being adopted worldwide and is recommended as a standardized method for ET 0 estimation under different climatic conditions. 7 found a declining trend in annual ET 0 at a rate of 0.15mm/year during the 1954-2013 period. While ET 0 is showing an increasing trend in some parts of the world, it has been reported to decline in other parts.…”

Section: Introductionmentioning

confidence: 90%

“…4 Upward trend in ET 0 was reported at the rate of 1.4 mm per year during the 1957-2008 period in the Southern Italy. 5 Significant increase in annual ET 0 was reported for the Southern Senegal for the period of 1950-2000 at the rate of 2.43,4.08,0.55 and 1.85 mm/year at Tambakounda, Kedougou, Kolda and Ziguinchor, respectively,6 In Southwest China, Feng et al 7 found a declining trend in annual ET 0 at a rate of 0.15mm/year during the 1954-2013 period. While ET 0 is showing an increasing trend in some parts of the world, it has been reported to decline in other parts.…”

mentioning

confidence: 97%

See 1 more Smart Citation

Untitled

2018

IJH

View full text Add to dashboard Cite

IntroductionReference evapotranspiration (ET 0 ) is one the most important parameters in agricultural, hydrological, and environmental studies. Despite the availability of numerous estimation methods, the Penman Monteith reference evapotranspiration method is the most accurate and being adopted worldwide and is recommended as a standardized method for ET 0 estimation under different climatic conditions. 1-2Hourly, daily, seasonal, and annual ET 0 are used for water resources planning, irrigation scheduling, rainfed agriculture, and the wetlands management. Evapotranspiration constitutes the main source of water losses at field, watershed and basin level as it is defined as the sum of the water loss by evaporation from various surfaces and transpiration from plant leaves. With the rising air temperatures on a global scale, an increase in ET 0 is expected as revealed by number of studies. Increasing trend in annual ET 0 was reported at 70% of examined weather stations in Iran with slopes varying from 2.30 to 11.28 mm/ year.3 Similar trend in ET 0 was found in Serbia. 4 Upward trend in ET 0 was reported at the rate of 1.4 mm per year during the 1957-2008 period in the Southern Italy. 5 Significant increase in annual ET 0 was reported for the Southern Senegal for the period of 1950-2000 at the rate of 2.43,4.08,0.55 and 1.85 mm/year at Tambakounda, Kedougou, Kolda and Ziguinchor, respectively,6 In Southwest China, Feng et al. 7 found a declining trend in annual ET 0 at a rate of 0.15mm/year during the 1954-2013 period. While ET 0 is showing an increasing trend in some parts of the world, it has been reported to decline in other parts. Song et al.8 reported significant decreasing trend in annual ET 0 across the North China Plain at the rate of 1.19 mm/year for the period of . Similarly, annual and seasonal ET 0 showed significant decreasing trend in North-East India.9 Irmak et al 10 reported decrease in ET 0 with a rate of 0.3596 mm/year for the period of 1893 to 2008 in the Platte River Basin, central Nebraska-USA and they attributed this decrease to an increase in precipitation with a rate of about 0.90mm/ year that significantly reduces the available energy. Huo et al.11 also found a decreasing trend in annual ET 0 at the rate of 3 mm/year in the North West China for the period of 1955-2008 due to the increase in precipitation as reported by Irmak et al.10 Zhang et al. 12 reported that annual ET 0 significantly declined at the rate of 1.29 mm/year from 1961 to 2012 in the Yellow River Basin, China. Xu et al. 13 reported a significant decreasing trend in ET 0 mainly caused by a significant decrease in the net radiation and a significant decrease in wind speed in Changjiang (Yangtze River) watershed. Liu & Zhang 14 indicated that in the driest Northwest region of China, ET 0 decreased from 1960 to 1993 at the rate of 2.34 mm/year and increased thereafter up to 2010 at the rate of 4.80 mm/year. Xing et al. 15 reported decadal variations in the ET 0 . Gao et al. 16 reported a decreasing trend in ET 0 at 46.7% of the ...

show abstract

Section: Introductionmentioning

confidence: 90%

mentioning

confidence: 97%

Untitled

2018

IJH

View full text Add to dashboard Cite

show abstract

“…The Penman-Monteith formula recommended by the Food and Agriculture Organization (FAO) of the United Nations was used to calculate the reference evapotranspiration (ET 0 ), which has been widely used and proven to be of high accuracy and practicability [36][37][38][39][40]. The Penman-Monteith formula is as follows:…”

Section: Calculation Of Reference Evapotranspirationmentioning

confidence: 99%

Future trends of water resources and influences on agriculture in China

Zhao

Wang

2020

PLoS ONE

View full text Add to dashboard Cite

Water resources are indispensable for all social-economic activities and ecosystem functions. In addition, changes in water resources have great significance for agricultural production. This paper uses five global climate models from CMIP5 to evaluate the future spatiotemporal variation in water resources in China under four RCP scenarios. The results show that the available precipitation significantly decreases due to evapotranspiration. Comparing the four RCP scenarios, the national average of the available precipitation is the highest under the RCP 2.6 and 4.5 scenarios, followed by that under the RCP 8.5 scenario. In terms of spatial distribution, the amount of available precipitation shows a decreasing trend from southeast to northwest. Regarding temporal changes, the available precipitation under RCP 8.5 exhibits a trend of first increasing and then decreasing, while the available precipitation under the RCP 6.0 scenario exhibits a trend of first decreasing and then increasing. Under the RCP 2.6 and 4.5 scenarios, the available precipitation increases, and the RCP 4.5 scenario has a higher rate of increase than that of RCP 2.6. In the context of climate change, changes in water resources and temperature cause widespread increases in potential agricultural productivity around Hu's line, especially in southwestern China. However, the potential agricultural productivity decreases in a large area of southeastern China. Hu's line has a partial breakthrough in the locking of agriculture, mainly in eastern Tibet, western Sichuan, northern Yunnan and northwestern Inner Mongolia. The results provide a reference for the management and deployment of future water resources and can aid in agricultural production in China.

show abstract

“…Due to the fact that the inverse distance weighting (IDW) method gave the lowest mean error, the method is applied widely all over world [3,27,35,36]. Thus, in this study, the IDW method is selected to analyze the spatial variation of ET 0 .…”

Section: Spatial Interpolationmentioning

confidence: 99%

“…Several studies have found a significant increase in temperature in the region during the past several decades [13,14,25]. In addition, a few previous studies had qualitatively indicated that annual ET 0 had a decreasing trend over the whole Northeast of China [18,19,[26][27][28]. However, few studies quantitatively analyze ET 0 variation against elevation in high altitude regions like northeast China.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Changes of Reference Evapotranspiration in the Highest-Latitude Region of China

Pan

Zhang

et al. 2017

Water

View full text Add to dashboard Cite

Reference evapotranspiration (ET 0 ) is often used to make management decisions for crop irrigation scheduling and production. In this study, the spatial and temporal trends of ET 0 in China's most northern province as well as the country's largest agricultural region were analyzed for the period from 1964 to 2013. ET 0 was calculated with the Penman-Monteith of Food and Agriculture Organization of the United Nations irrigation and drainage paper NO.56 (FAO-56) using climatic data collected from 27 stations. Inverse distance weighting (IDW) was used for the spatial interpolation of the estimated ET 0 . A Modified Mann-Kendall test (MMK) was applied to test the spatiotemporal trends of ET 0 , while Pearson's correlation coefficient and cross-wavelet analysis were employed to assess the factors affecting the spatiotemporal variability at different elevations. The results from this study showed a clear decreasing trend for annual ET 0 from the low elevation plain area to the high elevation mountainous area. Over the past five decades, ET 0 in Heilongjiang Province decreased in all seasons, except for the winter months, during which a steady increase in temperature was found. Elevation played an important role in estimating ET 0 in this higher-latitude region, while relative humidity was the most relevant meteorological factor that affected the spatiotemporal variation of ET 0 in the province. Overall, the findings from the study suggest that winter ET 0 in a high altitude region will continue to increase in the future as climate change persists, which could worsen spring droughts and irrigation management for semi-arid areas in the province.

show abstract

Spatiotemporal variation of reference evapotranspiration during 1954–2013 in Southwest China

Cited by 45 publications

References 43 publications

Untitled

Untitled

Future trends of water resources and influences on agriculture in China

Spatiotemporal Changes of Reference Evapotranspiration in the Highest-Latitude Region of China

Contact Info

Product

Resources

About