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Exploring association and forecasting of evapotranspiration based on meteorological factors over megacity Lahore (Pakistan) and central place of Indo-Gangetic Basin

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Abstract

Any change in a meteorological variable can affect an environmental element’s evapotranspiration over time. This paper studies the dynamic causal relationships between evapotranspiration and meteorological parameters, which have long-term equilibrium relationships in Lahore, Pakistan, during the period from October 2004 to March 2020. The Augmented Dicky Fuller test reveals that the ARDL Approach to Cointegration is used for forecasting ET (kg m−2 s−1). The results depicted that geopotential height, surface air temperature, relative humidity at the surface, surface wind speed, tropopause height, surface skin temperature, and water vapor mass mixing ratio have a statistically significant long-run relationship with evapotranspiration. The results also revealed that cloud fraction, relative humidity at the surface, surface air temperature, total surface precipitation, water vapor mass mixing ratio, and tropopause height have a statistically significant short-run relationship with evapotranspiration. The \({\mathrm{CF}}_{(\mathrm{t}-1)}\) has the strongest effect on ET (kg m−2 s−1) in the short and long run. Speed of adjustment (\({\mathrm{ECT}}_{\mathrm{t}-1}\)) shows a highly significant and negative relation, which indicates that after a 1 unit increase in the period, evapotranspiration (kg m−2 s−1) will go toward long-run equilibrium with a rate of 66.4%. The forecasted evapotranspiration time plot shows a long-term trend with seasonal components from April 2020 to March 2025.

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U.W. conceived the study, wrote, analyzed, and forecasted the probabilistic model, and drafted the manuscript. S.S. and S.A. read and made suggestions, and finalized the manuscript. All authors read and approved the final manuscript.

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Correspondence to Umra Waris.

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Waris, U., Sarif, S. & Batool, S.A. Exploring association and forecasting of evapotranspiration based on meteorological factors over megacity Lahore (Pakistan) and central place of Indo-Gangetic Basin. Environ Dev Sustain (2023). https://doi.org/10.1007/s10668-023-03471-y

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  • DOI: https://doi.org/10.1007/s10668-023-03471-y

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