Sensitivity of penman-monteith reference crop evapotranspiration in Tao’er River Basin of northeastern China

2008 ◽  
Vol 18 (4) ◽  
pp. 340-347 ◽  
Author(s):  
Liqiao Liang ◽  
Lijuan Li ◽  
Li Zhang ◽  
Jiuyi Li ◽  
Bin Li
Keyword(s):  
River Basin ◽  
Northeastern China ◽  
Crop Evapotranspiration ◽  
Reference Crop Evapotranspiration ◽  
Reference Crop

scholarly journals Impacts of Climatic Change on Reference Crop Evapotranspiration across Different Climatic Zones of Ningxia at Multi-Time Scales from 1957 to 2018

2020 ◽  
Vol 2020 ◽  
pp. 1-23
Author(s):  
Ziyang Zhao ◽  
Hongrui Wang ◽  
Cheng Wang ◽  
Wangcheng Li ◽  
Hao Chen ◽  
...  
Keyword(s):  
Water Management ◽  
Time Scales ◽  
Air Temperature ◽  
Climatic Factors ◽  
Crop Evapotranspiration ◽  
Climatic Zones ◽  
Reference Crop Evapotranspiration ◽  
Short Period ◽  
The Impact ◽  
Reference Crop

The impact of global climate change on agroecosystems is growing, affecting reference crop evapotranspiration (ET0) and subsequent agricultural water management. In this study, the climate factors temporal trends, the spatiotemporal variation, and the climate driving factors of ET0 at different time scales were evaluated across the Northern Yellow River Irrigation Area (NYR), Central Arid Zone (CAZ), and Southern Mountain Area (SMA) of Ningxia based on 20 climatic stations’ daily data from 1957 to 2018. The results showed that the Tmean (daily mean air temperature), Tmax (daily maximum air temperature), and Tmin (daily minimum air temperature) all had increased significantly over the past 62 years, whilst RH (relative humidity), U2 (wind speed at 2 m height), and SD (sunshine duration) had significantly decreasing trends across all climatic zones. At monthly scale, the ET0 was mainly concentrated from April to September. And at annual and seasonal scales, the overall increasing trends were more pronounced in NX, NYR, and SMA, while CAZ was the opposite. For the spatial distribution, ET0 presented a trend of rising first and then falling at all time scales. The abrupt change point for climatic factors and ET0 series was obtained at approximately 1990 across all climatic zones, and the ET0 had a long period of 25a and a short period of 10a at annual scale, while it was 15a and 5a at seasonal scale. RH and Tmax were the most sensitive climatic factors at the annual and seasonal scales, while the largest contribution rates were Tmax and SD. This study not only is important for the understanding of ET0 changes but also provides the preliminary and elementary reference for agriculture water management in Ningxia.

Study on Regional Analysis of Reference Crop Evapotranspiration Based on SPSS

2015 ◽  
Vol 733 ◽  
pp. 415-418
Author(s):  
Li Ying Cao ◽  
He Long Yu ◽  
Gui Fen Chen ◽  
Peng Sun
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Linear Correlation ◽  
Meteorological Data ◽  
Linear Regression Analysis ◽  
Regional Analysis ◽  
Crop Evapotranspiration ◽  
Reference Crop Evapotranspiration ◽  
Reference Crop ◽  
Monteith Equation

Based on the meteorological data collected from 3 stations in recent 10 years in Fushun region, the reference crop evapotranspiration was calculated with the Penman-Monteith equation recommended by FAO in 1990. The evapotranspiration of the region was analyzed using linear regression analysis based on software of SPSS. The results showed that the linear correlation was evident between the evapotranspiration data of stations, but it is not significant for the linear correlation between the stations, neither between the stations. The result will be helpful to analysis of the space distributions of the reference crop evapotranspiration in the region.

Reference crop evapotranspiration over Greece

1991 ◽  
Vol 20 (3) ◽  
pp. 209-221 ◽  
Author(s):  
H. Michalopoulou ◽  
G. Papaioannou
Keyword(s):  
Crop Evapotranspiration ◽  
Reference Crop Evapotranspiration ◽  
Reference Crop
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