Fig. 1: General overview of human observations of rainfall changes in comparison with instrumental observations of precipitation.
From: Using human observations with instrument-based metrics to understand changing rainfall patterns
A Ecozonal distribution of selected rainfall observation types made in subsistence-oriented communities and their agreement with instrument-based metrics; (B) Distribution of subsistence-oriented communities reporting changes in rainfall patterns (black circles), superposed on the decadal trend in Dimensionless Seasonality Index (DSI)2,22 (1955–2005). Solid grey lines indicate −23.5 and 23.5 degrees latitude (Tropics). Dashed lines indicate −35 and 35 degrees latitude (Subtropics); (C) Distribution of subsistence-oriented communities reporting changes in rainfall predictability (black circles), superposed on the decadal trend in DSI2,22 (1955–2005). Solid grey lines indicate −23.5 and 23.5 degrees latitude (Tropics). Dashed lines indicate −35 and 35 degrees latitude (Subtropics). TP Total Precipitation, R95p Annual total precipitation from days >95 percentile, CDD Consecutive Dry Days, PDSI Palmer Drought Severity Index. Human observations are provided as source data.
