Outlines › Global precipitation gauge coverage and siting priorities › Historical and future priority for new gauges

Historical and future priority for new gauges

Source: Precipitation observing network gaps limit climate change impact assessment · section · created seq 23058

Globally, approximately 25% of land areas are identified as high priority for siting new gauges

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Using a priority score for siting new gauges, the study identifies approximately 25% of global land as high priority under historical precipitation information from 1900 to 2022. High-priority land shares include 38.7% of Africa, 32.3% of South America and 33.6% of Europe. The priority framework combines gauge density with precipitation spatial variability. Under future scenarios, it incorporates projected precipitation, population and gross domestic product. Considering future precipitation and socioeconomic conditions from 2025 to 2100, 32.1% of global land is high priority under SSP5-8.5, compared with 17.7% under SSP1-2.6. Under SSP5-8.5, the high-priority share reaches 54.9% of Africa and 39.3% of South America, while Europe, Asia and North America also expand because of socioeconomic factors. The authors identify 171 countries as urgently needing new gauges under SSP5-8.5.

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