- New blow for UK's Starmer as growth data disappoints
- China's top banks to tweak mortgage rates to boost housing market
- Muslim women break taboos navigating east London's waterways
- Nepal dam-building spree powers electric vehicle boom
- More than 60 dead from storm Helene as rescue, cleanup efforts grow
- Dozens missing, 9 dead in migrant boat wreck off Spanish Canaries
- Death toll from Hurricane John hits eight in Mexico
- Storm Helene's toll rises as rescue and cleanup efforts gain pace
- SpaceX launches mission to return stranded astronauts
- Storm Helene kills 44, threatens more 'catastrophic' flooding as cleanup begins
- SpaceX set to launch mission to return stranded astronauts
- Storm Helene kills 44, threatens more 'catastrophic' flooding
- Boeing strike grinds on as latest talks fail to reach agreement
- Iran 'news' sites, hackers target Trump ahead of US election
- US ports brace for potential dockworkers strike
- Japan's speedy, spotless Shinkansen bullet trains turn 60
- US hurricane deaths rise to 44, fears of more 'catastrophic' flooding
- Global stocks mostly rise, cheering Beijing stimulus
- Europe en route for Moon with new simulator, says astronaut Pesquet
- Fireworks forecast if comet survives risky Sun flypast
- Argentina judge orders dictionary to delete pejorative definition of 'Jewish'
- Global stocks rise on rate hopes, Beijing stimulus
- S.African woman turns 118, among the oldest in the world
- UK clears $4 bn AI partnership between Amazon, Anthropic
- Barca fans barred from Champions League away game over racist banner
- Chinese stocks extend surge, Europe higher on Beijing stimulus
- Pope says Church must 'seek forgiveness' for child sexual abuse
- China caps week of 'bazooka' stimulus for ailing economy with rate cut
- Cuts, cash, credit: China bids to jumpstart flagging economy
- France's debt weighs heavier ahead of budget debate
- Iran treads carefully, backing Hezbollah while avoiding war
- Return to sender: waste stranded at sea stirs toxic dispute
- 'Broken' news industry faces uncertain future
- On remote Greek island, migratory birds offer climate clues
- Taken from mother by nuns, victim seeks answers as pope visits Belgium
- China cuts amount banks hold in reserve to boost lending
- Hong Kong, Shanghai extend surge as China optimism boosts markets
- Vietnam president reiterates support for Cuba during official visit
- Drought reduces Amazon River in Colombia by as much as 90%: report
- Stay or go? Pacific Islanders face climate's grim choice
- Florida bracing for 'unsurvivable' Hurricane Helene
- Poverty rises to over 52 percent in Milei's Argentina
- Chloe's see-through look may not be for Kamala Harris
- Champagne houses abuzz over English sparkling wine
- Macron, Trudeau pledge to work for 'decarbonized' economies
- Hurricanes, storms, typhoons... Is September wetter than usual?
- China stimulus, tech optimism boost stock markets
- 'Unsurvivable' Hurricane Helene races towards Florida
- Macron meets Trudeau in Canada as both face political setbacks
- South Korea surges in UN innovation index
Extreme rainfall increases exponentially with global warming: study
State-of-the-art climate models drastically underestimate how much extreme rainfall increases under global warming, according to a study published Monday that signals a future of more frequent catastrophic floods unless humanity curbs greenhouse emissions.
It comes as countries prepare to meet at the COP28 summit in Dubai beginning later this week, amid fears it could soon be impossible to limit long-term warming to the 1.5 degrees Celsius scientists say is necessary to curb the worst effects of human-caused climate change.
Researchers from the Potsdam Institute of Climate Impact Research (PIK) looked at the intensity and frequency of daily precipitation extremes over land in 21 "next generation" climate models used by a UN body in its global assessments.
They then compared the changes projected by the models with those observed historically, finding that nearly all climate models significantly underestimated the rates at which increases in precipitation extremes scaled with global temperature rise.
"Our study confirms that the intensity and frequency of heavy rainfall extremes are increasing exponentially with every increment of global warming," said Max Kotz, lead author of the paper published in the Journal of Climate.
The changes track with the Clausius-Clapeyron relation in physics, which established that warmer air holds more water vapor. This finding underpinned the fact that temperature and not wind dominate the global change in extreme rainfall events, according to the authors.
Stronger increases in rainfall intensity and frequency were found across the tropics and high-latitudes, like in Southeast Asia or Northern Canada, according to the study.
"Extreme rainfall will be heavier and more frequent. Society needs to be prepared for this," said co-author Anders Levermann. "The good news is that this makes it easier to predict the future of extreme rainfall. The bad news is: It will get worse, if we keep pushing up global temperatures by emitting greenhouse gases."
M.Mendoza--CPN