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Evolution of drought characteristics and propagation from meteorological to agricultural drought under the influences of climate change and human activities

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Abstract

Understanding the propagation of agricultural droughts (AD) is important to comprehensively assess drought events and develop early warning systems. The present study aims to assess the impacts of climate change and human activities on drought characteristics and propagation from meteorological drought (MD) to AD in the Yellow River Basin (YRB) over the 1950–2021 period using the Standardized Precipitation Evapotranspiration Index (SPEI) and Standardized Soil Moisture Index (SSMI). In total, the YRB was classified into three groups of catchments for spring wheat and four groups of catchments for winter wheat based on different human influence degrees (HId). In addition, the entire study period was divided into periods with natural (NP), low (LP), and high (HP) impacts of human activities, corresponding to 1950–1971, 1972–1995, and 1996–2021, respectively. The results demonstrated the significance and credibility of the application of the natural and human-impacted catchment comparison method for drought characteristics and propagation from meteorological to agricultural drought in the YRB. Winter wheat showed a more pronounced drying trend than spring wheat under both MD and AD. The results showed meteorological drought intensity (MDI) and agricultural drought intensity (ADI) intensified for spring and winter wheat in NP, with correspondingly a short propagation time, followed by those in the LP and HP in catchments minimally impacted by human activities. On the other hand, increases in the MDI and ADI, as well as in their times, for both spring and winter wheat were observed from the LP to the HP in all catchments. The MDI, ADI, and their propagation times for winter wheat generally showed greater fluctuations than those for spring wheat. Human activities increasingly prolonged the drought propagation time. In contrast, climate change insignificantly shortened the drought propagation time.

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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We would like to thank MogoEdit (https://www.mogoedit.com) for its English editing during the preparation of this manuscript.

Funding

This work was supported by the National Key R&D Program of China (2021YFD1900700) and the National Natural Science of China (52179046).

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Liang Li analyzed and interpreted the study data, and wrote the manuscript. Qing Peng analyzed the study data. Zongyang Li analyzed the study data. Huanjie Cai modified the manuscript and provided the fundings. All authors read and approved the final manuscript.

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Correspondence to Huanjie Cai.

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Li, L., Peng, Q., Li, Z. et al. Evolution of drought characteristics and propagation from meteorological to agricultural drought under the influences of climate change and human activities. Environ Sci Pollut Res 31, 26713–26736 (2024). https://doi.org/10.1007/s11356-024-32709-z

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  • DOI: https://doi.org/10.1007/s11356-024-32709-z

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