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A multifractal cross-correlation investigation into sensitivity and dependence of meteorological and hydrological droughts on precipitation and temperature

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Abstract

Several studies have been conducted on droughts, precipitation, and temperature, whereas none have addressed the underlying relationship between nonlinear dynamic properties and patterns of two main hydrological parameters, precipitation and temperature, and meteorological and hydrological droughts. Monthly datasets of Midlands in the UK between 1921 and 2019 were collected for analysis. Subsequent to apply a multifractal approach to attain the nonlinear features of the datasets, the relationship between two hydrological parameters and droughts was investigated through the cross-correlation technique. A similar process was performed to analyze the relationship between multifractal strength variations in time series of precipitation and temperature and droughts. The nonlinear dynamic results indicated that droughts (meteorological and hydrological) were substantially affected by precipitation than temperature. In other words, droughts were more sensitive to precipitation fluctuations than temperature fluctuations. Concerning temperature, meteorological, and hydrological droughts were dependent on the minimum and maximum temperatures (\(T_{{{\text{min}}}}\) and \(T_{{{\text{max}}}}\)), respectively. The correlation between precipitation and meteorological drought was more long-range persistence than precipitation and hydrological drought. Besides, the correlation between \(T_{{{\text{max}}}}\) and droughts was more long-range persistence than \(T_{{{\text{min}}}}\) and droughts. Analysis of nonlinear dynamic patterns proved that the multifractal strength of meteorological drought depended on the multifractal strength of precipitation and \(T_{{{\text{max}}}}\), whereas the multifractal strength of hydrological drought depended on the multifractal strength of the \(T_{{{\text{min}}}}\). The correlation between precipitation and drought indices exhibited more multifractal strength than temperature and drought indices. Finally, the pivotal role of maximum temperature on drought events was quite alerting due to global warming intensification.

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Availability of data and material

Some or all data and models that support the findings of this study are available from the corresponding author upon reasonable request. The corresponding author is ready to share data with other researchers who send their request to this Email address: fattahi.mh@gmail.com.

Code availability

Codes that support the findings of this study are available from the corresponding author upon reasonable request. The corresponding author is ready to share data with other researchers who send their request to this Email address: fattahi.mh@gmail.com.

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Acknowledgements

The authors thank the Met Office and National River Flow Archive websites because of providing us with raw data of precipitation, temperature, and flow data. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Rahmani and Fattahi contributed to conceptualization; Rahmani and Fattahi contributed to methodology; Rahmani contributed to formal analysis and investigation; Rahmani contributed to writing—original draft preparation; Rahmani and Fattahi contributed to Writing— review, and editing; Fattahi contributed to supervision.

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Correspondence to Mohammad Hadi Fattahi.

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Rahmani, F., Fattahi, M.H. A multifractal cross-correlation investigation into sensitivity and dependence of meteorological and hydrological droughts on precipitation and temperature. Nat Hazards 109, 2197–2219 (2021). https://doi.org/10.1007/s11069-021-04916-1

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  • DOI: https://doi.org/10.1007/s11069-021-04916-1

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