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- W4387007122 abstract "Abstract Flash drought typically refers tothe rapid intensification process that would only persist for a certain amount of time. In spite of short duration, flash drought may cause destructive impacts on agricultural and ecological sectors due to the sustained drought severity during or after the rapid intensification period. Understanding the persistence of flash drought, its regional patterns, and to what extent a transition from rapid intensification to conventional drought occurs is beneficial for drought monitoring and drought management. Employing surface and root-zone soil moisture reanalysis datasets, the notion of accumulated water deficits over varying time scales (can be detected by the moving averages of daily soil moisture series from 1 to 300 days) was introduced to explore how the signal of flash drought fades away over China during the period of 1950 to 2021. Results show that the flash drought signal gradually attenuates under the increased time scales of water deficits. With significant spatial differences, more than 50% of flash drought on average would be lost at a 10-day time scale, and the attenuation ratio may reach 90% when the time scale increases to 100 days. Under the effects of accumulated water deficits, the majority of flash drought events may evolve into conventional drought before dissipating completely. Soil moisture memory has a finite effect on the attenuation of flash drought signal. Flash drought signal dissipates slowly in areas with strong soil moisture memory. As time scale increases, both flash drought signal and the memory of soil moisture decrease, and their correlation also weakens.
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- W4387007122 created "2023-09-26" @default.
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- W4387007122 date "2023-09-25" @default.
- W4387007122 modified "2023-10-18" @default.
- W4387007122 title "Flash drought fades away under the effect of accumulated water deficits：the persistence and transition to conventional drought" @default.
- W4387007122 doi "https://doi.org/10.1088/1748-9326/acfccb" @default.
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