Rapid increase of climate extremes reveals new areas of concern in Amazonia

Le résumé fourni par la source

Abstract Amazonia is highly sensitive to climate extremes, yet we lack an Amazon-wide assessment that examines the spatial-temporal changes in these extreme conditions. We address this within seasons and across the hydrological year, using a quantiles approach that integrates the frequency and magnitude of climate extremes and by linking changes in temperature with evapotranspiration. We show that high temperature extremes and temperature-linked measures of water deficit are both changing at a much faster rate than central trends. The 95 th percentile of maximum temperatures in the driest period increased by 0.49 °C per decade (dec -1 ) compared to 0.21°C dec -1 for the central trend of mean temperatures for the year. Crucially, over 700,000 square kilometres in central-north Amazonia have experienced increases in extreme dry season temperatures ≥ 0.75 °C dec -1 ( ≥ 3.22 °C over 43 years). Adaptation measures for these rapid changes in climate extremes must include preventing the deforestation and disturbances that amplify risks.

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