Extreme events
US 1-in-1000-year rainstorms become much more common
Open access · cc by · source: Europe PMC
Today’s thousand-year three-day downpours over the United States could strike several times more often at 2–4 °C of global warming.
Study at a glance
- Design
- Other — Pooled GPCC extremes mapped onto CMIP5 RCP8.5 warming levels for CONUS regions
- N
- N=834 · 834 GPCC 1° cells clustered into 15 precipitation-regime regions (1988–2013)
- Population
- CONUS extreme 3-day rainfall regimes under historical and warmed climates
- Outcome
- Frequency increases of present-day 1000-year 3-day events at 2–4 °C warming
Structured fields used in claim comparison tables when every cited study has a complete layer.
Key findings
Historical 1000-year 3-day events occur 2–5 times more often at 2 °C and 5–10 times more often at 4 °C, depending on region. All clusters intensify 500-year events; East Coast intensity more than doubles while the western-states cluster changes less. Only four models reach 4 °C in RCP8.5.
Methodology
The authors clustered 834 GPCC 1° cells into 15 precipitation-regime regions, pooled 1988–2013 annual-max 3-day rain to estimate 1000-year events, then mapped those events onto CMIP5 RCP8.5 climates at 0.67, 1.5, 2, 3, and 4 °C above 1851–1880.
Limitations
1° grids hide local orographic extremes. Pooling assumes independence that is only tested, not guaranteed. High-warming results use a four-model subset. The 26-year GPCC record is short even after spatial pooling.
How this study connects
Role on claims
Each row is a claim on a concept or method page where this paper supports, challenges, or qualifies the statement. Roles are hand-checked — not a model guess.
This library holds 5 empirical papers on extreme events with measured outcomes rather than reviews.
Evidence for the claim as stated.
Today’s thousand-year three-day downpours over the United States could strike several times more often at 2–4 °C of global warming.
Evidence for the claim as stated.
A record event in one season does not by itself prove a shift in the full distribution.
Evidence for the claim as stated.
Open questions
Tensions this paper is part of
From concept pages' “where studies disagree.” Disagreement means the same question; scope means different assays, populations, or outcomes.
A record event in one season does not by itself prove a shift in the full distribution.
- Supports · Clouds amplified the 2022 Antarctic heatwave
Related papers in this topic
Same topic cluster — not a recommendation engine.