Concept · earth-climate
Extreme events
Follow Extreme events — see important new research and changes in evidence.Change log
What changed
Dated edits to this page's evidence: studies added or removed from a claim, claims added or withdrawn, and new explanations tagged here. Rewordings are not listed.
- Concept page published
Extreme-event studies quantify unusual heat, rain or compound floods in observations or models, including attribution-style questions.
Extremes are what students and the public actually feel from climate change.
Evidence
What the evidence shows
Drawn from 5 studies in this library. Each finding starts with a plain-language takeaway, then the denser detail. Supports means evidence for a finding; Challenges means evidence against a stated position; Qualifies marks scope with a short note on each study’s contribution. Challenged positions are labeled — they are not findings.
This library holds 5 empirical papers on extreme events with measured outcomes rather than reviews.
- Clouds amplified the 2022 Antarctic heatwave
- US 1-in-1000-year rainstorms become much more common
- Wilder rainfall swings make record storms more likely
Study Role Design N Population Outcome Clouds amplified the 2022 Antarctic heatwave Supports Computational / modelling27 km CRYOWRF factual vs pseudo-global-warming storylines of the March 2022 heatwave Storyline simulations driven by ERA5 and six CMIP6 deltas; not an observational sample N East Antarctic atmosphere/firn during 15–20 March 2022 under present and counterfactual climates Cloud/longwave amplification of heatwave temperature and future meltwater implications US 1-in-1000-year rainstorms become much more common Supports OtherPooled GPCC extremes mapped onto CMIP5 RCP8.5 warming levels for CONUS regions N=834 · 834 GPCC 1° cells clustered into 15 precipitation-regime regions (1988–2013) CONUS extreme 3-day rainfall regimes under historical and warmed climates Frequency increases of present-day 1000-year 3-day events at 2–4 °C warming Wilder rainfall swings make record storms more likely Supports Computational / modelling100-member CESM2-LE analysis of record-shattering daily extremes under SSP3-7.0 N=100 · 100-member CESM2 large ensemble (other CMIP6 ensembles as checks) Land daily precipitation extremes in CESM2 large-ensemble climate projections Record-shattering extreme-rain probability driven by growing variability vs mean shifts Water-vapor and supercooled-cloud feedbacks added several degrees to the March 2022 East Antarctic heatwave compared with a preindustrial storyline.
Today’s thousand-year three-day downpours over the United States could strike several times more often at 2–4 °C of global warming.
Future record-shattering daily downpours become much more probable because extreme-rain variability grows, not only because the mean inches up.
For monsoon extremes over India, stronger upward motion supplies most of the extra moisture, not the Clausius–Clapeyron humidity increase alone.
Open questions
Tensions and limits
Some items are genuine disagreements on the same question. Others mark different assays, populations, or outcomes — limits on how far one study travels — not a forced fight between papers.
A record event in one season does not by itself prove a shift in the full distribution.
Study Role Design N Population Outcome Clouds amplified the 2022 Antarctic heatwave Supports Computational / modelling27 km CRYOWRF factual vs pseudo-global-warming storylines of the March 2022 heatwave Storyline simulations driven by ERA5 and six CMIP6 deltas; not an observational sample N East Antarctic atmosphere/firn during 15–20 March 2022 under present and counterfactual climates Cloud/longwave amplification of heatwave temperature and future meltwater implications US 1-in-1000-year rainstorms become much more common Supports OtherPooled GPCC extremes mapped onto CMIP5 RCP8.5 warming levels for CONUS regions N=834 · 834 GPCC 1° cells clustered into 15 precipitation-regime regions (1988–2013) CONUS extreme 3-day rainfall regimes under historical and warmed climates Frequency increases of present-day 1000-year 3-day events at 2–4 °C warming
Common misconceptions
Climate change means every storm is unprecedented.
Risk is a change in frequency and intensity, not a label on a single storm.
Exam-style questions
Short-answer questions that ask you to explain or compare, not recall.
What does extreme events mean in this library?
Extreme-event studies quantify unusual heat, rain or compound floods in observations or models, including attribution-style questions.
Name one empirical finding from the extreme events papers.
Water-vapor and supercooled-cloud feedbacks added several degrees to the March 2022 East Antarctic heatwave compared with a preindustrial storyline.
What is a limit of extreme events evidence here?
A record event in one season does not by itself prove a shift in the full distribution.
The studies
5 studies in this library bear on Extreme events, ordered by citations.
- Wilder rainfall swings make record storms more likely
Future record-shattering daily downpours become much more probable because extreme-rain variability grows, not only because the mean inches up.
- Future Floyd–Florence rains could jump sharply
A design-rainfall method applied to three historic tropical cyclones projects large late-century increases in eastern North Carolina extreme rain.
- Indian downpours are driven more by uplift than extra humidity
For monsoon extremes over India, stronger upward motion supplies most of the extra moisture, not the Clausius–Clapeyron humidity increase alone.
- US 1-in-1000-year rainstorms become much more common
Today’s thousand-year three-day downpours over the United States could strike several times more often at 2–4 °C of global warming.
- Clouds amplified the 2022 Antarctic heatwave
Water-vapor and supercooled-cloud feedbacks added several degrees to the March 2022 East Antarctic heatwave compared with a preindustrial storyline.
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