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- W4313993344 abstract "Quantifying the spatial and interconnected structure of regional to continental scale droughts is one of the unsolved global hydrology problems, which is important for understanding the looming risk of mega-scale droughts and the resulting water and food scarcity and their cascading impact on the worldwide economy. Using a Complex Network analysis, this study explores the topological characteristics of global drought events based on the self-calibrated Palmer Drought Severity Index. Event Synchronization is used to measure the strength of association between the onset of droughts at different spatial locations within the time lag of 1-3 months. The network coefficients derived from the synchronization network indicate a highly heterogeneous connectivity structure underlying global drought events. Drought hotspot regions such as Southern Europe, Northeast Brazil, Australia, and Northwest USA behave as drought hubs that synchronize regionally and with other hubs at inter-continental or even inter-hemispheric scale. This observed affinity among drought hubs is equivalent to the 'rich-club phenomenon' in Network Theory, where 'rich' nodes (here, drought hubs) are tightly interconnected to form a club, implicating the possibility of simultaneous large-scale droughts over multiple continents." @default.
- W4313993344 created "2023-01-10" @default.
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- W4313993344 date "2023-01-10" @default.
- W4313993344 modified "2023-10-10" @default.
- W4313993344 title "Global droughts connected by linkages between drought hubs" @default.
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- W4313993344 doi "https://doi.org/10.1038/s41467-022-35531-8" @default.
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