Comparison of Two Temperature-Based Methods of Estimating Potential Evapotranspiration (PET) in Texas

Venkataraman, Kartik; Nelson, Madisyn; Frandsen, Caleb

doi:10.1061/9780784479872.072

Cited by 2 publications

(2 citation statements)

References 30 publications

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“…SPEI is a multi-scalar index that uses the differences between precipitation (P) and potential evapotranspiration (PET), thus including the impact of temperature on soil moisture responsible for crop growth. There exist several methods of computing PET, from the simple Thornthwaite or Hargreaves [57,58] to the sophisticated FAO and WMO's standard accepted Penman-Monteith (PM) [59] method. Due to data limitations, this study used Hargreaves using minimum, maximum air temperature, and geographic coordinates of the stations [57].…”

Section: Determination Of Drought Severity Indexmentioning

confidence: 99%

Impacts of Temperature Trends and SPEI on Yields of Major Cereal Crops in the Gambia

Jabbi

Zhang

et al. 2021

Sustainability

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Variations in the climate constitute a significant threat to the productivity of food crops in the Gambia. A good understanding of the influence of climate variability on crop production is vital for climate resilience and improved food security. This study examined the trends, relationships, and the extent to which growing season temperatures and the SPEI (Standardized Precipitation and Evapotranspiration Index) impacted sorghum, millet, maize, and rice yields in three agro-ecological regions of the Gambia during 1990–2019. Mean temperatures and the SPEI exhibited increasing trends while observed yields showed a decline across all regions. The SPEI had a significant positive relationship with yields, and temperatures were negatively associated with yields. Though yield response to climate variability differs among regions, 20% to 62% of variations in the four crop yields were due to climate trends. The combined effect of the SPEI and temperatures decreased yields from 3.6 kg ha−1 year−1 to 29.4 kg ha−1 year−1, with the most severe decline observed in rice and maize yields in the Sahelian zone. Although uncertainties might arise from not considering related extreme climate events, this study highlights how past climate trends affect cereal yields in the Gambia; thus, any unfavorable change in the local climate could have severe repercussions on the country’s food security. There is a need for concerted efforts to increase investments in adaptation strategies to lessen the effects of the climate for improved crop productivity.

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Section: Determination Of Drought Severity Indexmentioning

confidence: 99%

Impacts of Temperature Trends and SPEI on Yields of Major Cereal Crops in the Gambia

Jabbi

Zhang

et al. 2021

Sustainability

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“…Finally, apositive/negative RDI (i) st(k) renders dry/wet conditions In Safran, PET is determined according to the Food and Agriculture Organization of the United Nations (FAO) Penman-Monteith equation [28] which requires, beside temperature, data on wind speed, air humidity, radiation and albedo. The availability of all these parameters is often limited and many approaches often refer to estimates of PET which is derived from temperature data alone [29,30]. In our study, we therefore also tested whether T-derived PET estimates (PETt) can be used for the prediction of annual runoff.…”

Section: Climate Datamentioning

confidence: 99%

Unravelling Climate and Anthropogenic Forcings on the Evolution of Surface Water Resources in Southern France

Labrousse

Ludwig

Pinel

et al. 2020

Water

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In the Mediterranean, climate change and human pressures are expected to significantly impact the availability of surface water resources. In order to quantify these impacts during the last 60 years (1959–2018), we examined the hydro-climatic and land use change evolution in six coastal river basins of the Gulf of Lion in southern France. By combining observed water discharge, gridded climate, mapped land use and agricultural censuses data, we propose a statistical regression model which successfully reproduces the variability of annual water discharge in all basins. Our results clearly demonstrate that, despite important anthropogenic water withdrawals for irrigation, climate change is the major driver for the detected reduction of water discharge. The model can explain 78–88% of the variability of annual water discharge in the study catchments. It requires only two climatic indices that are solely computed from monthly temperature (T) and precipitation (P) data, thus allowing the estimation of the respective contributions of both parameters in the detected changes. According to our results, the study region experienced on average a warming trend of 1.6 °C during the last 60 years which alone was responsible for a reduction of almost 25% of surface water resources.

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Comparison of Two Temperature-Based Methods of Estimating Potential Evapotranspiration (PET) in Texas

Cited by 2 publications

References 30 publications

Impacts of Temperature Trends and SPEI on Yields of Major Cereal Crops in the Gambia

Impacts of Temperature Trends and SPEI on Yields of Major Cereal Crops in the Gambia

Unravelling Climate and Anthropogenic Forcings on the Evolution of Surface Water Resources in Southern France

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