Evapotranspiration Response to Climate Change

Snyder, Richard L.; Moratiel, R.; Song, Zhenwei; Swelam, Atef; Jomaa, Ihab; Shapland, T. M.

doi:10.17660/actahortic.2011.922.11

Cited by 41 publications

(21 citation statements)

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“…To assess the possible impact of climate change on ET o , Snyder et al [10] used the standardized reference evapotranspiration (ET o ) equation for short canopies [7,8] that uses daily radiation, temperature, humidity, wind speed, and canopy resistance data to calculate ET o . The following version of the ET o equation [11] was used for the analysis:…”

Section: Reference Evapotranspirationmentioning

confidence: 99%

“…Cayan et al [13] projected a 3 • C mean temperature increase by 2050 as a worst-case scenario for California. Therefore, Snyder et al [10] evaluated the possible impact of climate change on ET o by assuming that the mean air temperature would increase by 3.0 • C, with T n and T x increasing by 4.0 • C and 2.0 • C, respectively. Globally, the temperatures were rising, with no increase in relative humidity, which implies that the vapor pressure was also rising.…”

Section: Reference Evapotranspirationmentioning

confidence: 99%

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Climate Change Impacts on Water Use in Horticulture

Snyder

2017

Horticulturae

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Abstract:The evidence for anthropogenic global climate change is strong, and the projected climate changes could greatly impact horticultural production. For horticulture, two of the biggest concerns are related to the scarcity of water for crop production and the potential for increased evapotranspiration (ET). While ET is known to increase with air temperature, it is also known to decrease with increasing humidity and atmospheric CO 2 concentration. Considering all of these factors and a plausible climate projection, this paper demonstrates that ET may increase or decrease depending on the magnitude of atmospheric changes including wind speed. On the other hand, the evidence is still strong that water resources will become less reliable in many regions where horticultural crops are grown.

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Section: Reference Evapotranspirationmentioning

confidence: 99%

Section: Reference Evapotranspirationmentioning

confidence: 99%

Climate Change Impacts on Water Use in Horticulture

Snyder

2017

Horticulturae

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“…Furthermore, he also stated that ETo value calculated for Demiatte was the lowest in all studied governorates. Snyder et al (2011) concluded that the impact of global warming on ETo will likely be less in locations with higher wind speeds. So, the studied governorates are located close to the Mediterranean Sea and are characterized by wind speeds between 4.3 and 4.9 m/s.…”

Section: Water Requirements Under Climate Changementioning

confidence: 99%

Water requirements for wheat and maize under climate change in North Nile Delta

Ouda

Noreldin

El-Latif

2014

Span. j. agric. res.

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Determination of water requirements for wheat and maize under climate change is important for policy makers in Egypt. The objectives of this paper were to calculate (i) ETo and (ii) water requirements for wheat and maize crops grown in five governorates (Alexandria, Demiatte, Kafr El-Sheik, El-Dakahlia and El-Behira) located in North Nile Delta of Egypt under current climate and climate change. ECHAM5 climate model was used to develop A1B climate change scenario in 2020, 2030 and 2040. Monthly values of evapotranspiration (ETo) under the different scenarios in these governorates were calculated using Hargreaves-Samani equation (H-S). Then, these values were regressed on ETo values previously calculated by Penman-Monteith equation (P-M) and linear regression (prediction equations were developed for each governorate). The predicted ETo values were compared to the values of ETo calculated by P-M equation and the deviations between them were very low (RMSE/obs=0.04-0.06 mm and R2 =0.96-0.99). Water requirements for wheat and maize were calculated using BISm model under current climate and in 2020, 2030 and 2040. The results showed that average annual ETo would increase by low percentage in 2020 and 2030. However, in 2040 the increase would reach 8%. Water requirements are expected to increase by 2-3% for wheat and by 10-15% for maize, which would result in reduction of the cultivated area. Thus, it is very important to revise and fix the production system of wheat and maize, in terms of the used cultivars, fertilizer and irrigation application to overcome the risk of climate change.

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“…Islam et al (2012) su ustanovili da bi se povećala norma navodnjavanja kukuruza u Velikoj ravnici SAD-a u uslovima klimatskih promena od 11% do 40% od 2010. do 2099. godine. U scenarijima sa povećanom koncentracijom CO 2 ne dolazi do povećanja normi navodnjavanja, niti povećanjem evapotranspiracije, što se poklapa sa istraživanjima Snyder et al (2011) i Snyder (2012. Čak i u humidnijim područjima poput Nemačke, utvrđeno je da će se potrebe za navodnjavanjem povećavati, jer dolazi do promene distribucije vode tako što se više vode javlja u toku hladnog dela godine, a sve manje u toku letnjih meseci (Schmidt i Zinkernagel, 2012).…”

Section: Rezultati I Diskusijaunclassified

Application of AquaCrop model for yield and irrigation requirement estimation of sugar beet under climate change conditions in Serbia

Stričević

Djurović

Vuković³

et al. 2014

J AGR SCI BELGRADE

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Rezime: Uticaj klimatskih promena na proizvodnju hrane je od velikog značaja za strateško planiranje upravljanja prirodnim resursima, pre svega vode i zemljišta. Stoga je cilj ovoga rada bio da se proceni kako klimatske promene mogu uticati na prinose šećerne repe, norme navodnjavanja i mogućnosti uštede vode za navodnjavanje. Za simulaciju prinosa i potreba useva za vodom korišćen je model AquaCrop i rezultati povezanog regionalnog klimatskog modela za atmosferu i okean EBU-POM za scenarija A1B, A2 za prvi period (2010-2039); drugi (2040-2069) i treći . U scenarijima sa oznakom A1B* i A2* su u modelu AquaCrop uzete povećane koncentracije CO 2 . Na područjima Vojvodine i centralne Srbije se jasno vidi da se u prvom periodu neće smanjiti prinosi ni po jednom scenariju, već se mogu očekivati i povećanja po svim varijantama gajenja šećerne repe. U drugom periodu, uočavaju se padovi prinosa u scenarijima A1B i A2 na području Vojvodine, dok se u centralnoj Srbiji može očekivati i pad prinosa u scenariju A1B kao i u scenariju A2*. Navodnjavanjem se u svim scenarijima značajno povećava prinos, s tim što je povećanje prinosa izraženije na području centralne Srbije. Ukoliko bi se koristile optimalne norme navodnjvanja prinos bi mogao da se poveća od 57-97% u Vojvodini i 77-285% u centralnoj Srbiji. Uticaj navodnjavanja na povećanje prinosa je najmanji u prvom periodu i on linearno raste u drugom i trećem periodu. U uslovima redukovanog navodnjavanja u scenariju A2, na području centralne Srbije voda bi mogla da se uštedi samo na račun pada prinosa. Za postizanje visokih prinosa, neophodno je obezbediti od 300 do 500 mm vode, a na području Vojvodine od 300 do 420 mm, s mogućnošću uštede za oko 20%. Pri scenariju A1B bi se moglo uštedeti do 80 mm na oba područja.

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Evapotranspiration Response to Climate Change

Cited by 41 publications

References 0 publications

Climate Change Impacts on Water Use in Horticulture

Climate Change Impacts on Water Use in Horticulture

Water requirements for wheat and maize under climate change in North Nile Delta

Application of AquaCrop model for yield and irrigation requirement estimation of sugar beet under climate change conditions in Serbia

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