Climate and vegetation seasonality play comparable roles in water partitioning within the Budyko framework

•Introducing climate (CS) and vegetation seasonality (VS) into the Budyko framework.•CS and VS jointly contribute more than the changes in P and ET0 in water partitioning.•In average the contributions of VS and CS in water partitioning are equally important. Climate and vegetation changes are main f...

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Bibliographic Details
Published in:Journal of hydrology (Amsterdam) 2022-02, Vol.605, p.127373, Article 127373
Main Authors: Liu, Meixian, Lin, Kairong, Cai, Xitian
Format: Article
Language:English
Subjects:
Climate change
Eco-hydrology
Vegetation dynamics
Water balance
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Summary:•Introducing climate (CS) and vegetation seasonality (VS) into the Budyko framework.•CS and VS jointly contribute more than the changes in P and ET0 in water partitioning.•In average the contributions of VS and CS in water partitioning are equally important. Climate and vegetation changes are main factors influencing water partitioning. However, their impacts on water partitioning are still not well understood. To revisit the interactions among climate, vegetation and water partitioning, this study introduces the climate seasonality (CS) and vegetation seasonality (VS) into the Budyko framework, by using a statistical approach combining the three-parameter Log-logistic probability distribution and multiple linear regression, based on the monthly 〈P-ET0〉 (precipitation (P) minus potential evapotranspiration (ET0)) and Normalized Difference Vegetation Index (NDVI). This method is then validated and applied in 86 global catchments to quantify the contribution of climate and vegetation changes to evapotranspiration (ET). Results show that this model can predict well (mean R2 = 0.81 ± 0.05, P 
ISSN:0022-1694
1879-2707
DOI:10.1016/j.jhydrol.2021.127373