A schematic of the timing of the first emergence (TFE) of regional unprecedented drought conditions. (IMAGE)

National Institute for Environmental Studies

A schematic of the timing of the first emergence (TFE) of regional unprecedented drought conditions.

Caption

The thick black line represents the time series of the regional average frequency of drought days (FDD), and the gray-shaded area shows the historical value range based on the minimum and maximum values observed during the reference period (1865-2005). When the time series of the statistics deviates from the experienced historical range consecutively for x-years, TFEx is defined as the first year of the x-year period. For example, TFEs with x=3-15, including TFE5, are the years indicated by the orange arrows.

Credit

Satoh et al. 2022 NatCommns (DOI: 10.1038/s41467-022-30729-2)

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