Amplification of Extreme Hot Temperatures over Recent Decades Climate
收藏NOAA Institutional Repository2023-09-12 更新2026-04-25 收录
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https://doi.org/10.3390/cli11020042
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资源简介：
While global warming is mostly conceptualized in terms of increases in mean temperature, changes in the most extreme conditions encountered often have disproportionate impacts. Here, a measure of warming amplification is defined as the change in the highest yearly temperature (denoted TXx), representing extreme heat, minus that in the 80th percentile daily high temperature (Tmax80), which represents typical summer conditions. Based on the ERA5 reanalysis, over 1959–2021, warming of TXx averaged 1.56 K over land areas, whereas warming of Tmax80 averaged 1.60 K. However, the population-weighted mean warming of TXx significantly exceeded warming of Tmax80 (implying positive amplification) over Africa, South America, and Oceania. Where available, station temperature observations generally showed similar trends to ERA5. These findings provide a new target for climate model calibration and insight for evaluating the changing risk of temperature extremes. Grant no. NA16SEC4810008 Grant no. NA22SEC4810016
提供机构：
NOAA
创建时间：
2023-09-12
