🌍 Pushing #ClimateModeling to the Next Level
What happens when you run global climate #simulations at the kilometre scale for multiple years
In our latest blog post, we share insights from a landmark #nextGEMS study using ECMWF’s Integrated Forecasting System coupled to high-resolution ocean–sea ice models.
These simulations capture fine-scale processes—from mesoscale #OceanEddies to #UrbanHeat patterns—that coarser models can’t resolve, offering a more realistic picture of our climate system. Along the way, the team tackled key challenges, from water and #EnergyConservation to improving the simulation of #ExtremePrecipitation and polar sea ice leads.
💡 The results point towards more accurate, actionable climate information—but also highlight the huge computational demands of this frontier.
📖 Read the blog post on our website and comment below to get the link to the original publication by Thomas Rackow et al., 2025.
#H2020 #HighResolutionModels #EarthSystemScience #StormResolvingModels
Anthropogenic amplification of precipitation variability over the past century
Wenxia Zhang, Tianjun Zhou , and Peili Wu
25 Jul 2024
Abstract
"As the climate warms, the consequent moistening of the atmosphere increases #ExtremePrecipitation. #Precipitation variability should also increase, producing larger wet-dry swings, but that is yet to be confirmed observationally. Here we show that precipitation variability has already grown globally (over 75% of land area) over the past century, as a result of accumulated #anthropogenic warming. The increased variability is seen across daily to intraseasonal timescales, with daily variability increased by 1.2% per 10 years globally, and is particularly prominent over Europe, Australia, and eastern North America. Increased precipitation variability is driven mainly by thermodynamics linked to atmospheric moistening, modulated at decadal timescales by circulation changes. Amplified precipitation variability poses new challenges for weather and climate predictions, as well as for resilience and adaptation by societies and #ecosystems."
https://www.science.org/doi/10.1126/science.adp0212
#ExtremeWx #Drought #UnpredictableWeather #ExtremeRains #Flooding
#ClimateCatastrophe #GlobalWarming #ClimateChange #ClimateCrisis #Resiliency #ClimateAction #ClimateActionNow
"On Thursday, October 17, six French departments south of Lyon faced "exceptional" rainfall of up to 650 millimeters. A torrent raged over the city of Annonay, with cars submerged and firefighters in diving suits. Aurélien Ribes, a researcher at Météo-France's National Center for Meteorological Research, points out that this phenomenon is likely to recur with #ClimateChange."
https://www.lemonde.fr/en/environment/article/2024/10/19/flooding-in-france-global-warming-is-generating-even-more-severe-episodes-of-heavy-precipitation_6729863_114.html#
#ExtremePrecipitation #France
To spell it out for the #US east coast: Heat lingers more south of Florida where #hurricanes can pick up more power and more moisture, faster, so #RapidIntensification.
As they travel north, that moisture comes down as #ExtremePrecipitation, meaning record #rain.
Meanwhile #StormSurge is whipped up by stronger winds in the hurricane. And gets amplified by the #SeaLevelRise from the slowed ocean current.
Batten down the hatches, East Coast.
https://phys.org/news/2023-09-definitively-gulf-stream-weakening.html
Without #emission reductions and #managedretreat from #vulnerable areas city #adaptation to #extremeprecipitation will be mostly miss.
#keepitintheground #NationalizeFossilFuels #GreenNewDealJobs
There’s a rule of thumb that rainfall intensity increases by about 7% per degree Celsius as temperatures rise. But the increase is much higher in the mountains, scientists found.
Once-a-century extreme precipitation could occur every 30 years in the US by 2100, according to a new study. The researchers used climate models and historical data to project how the frequency and intensity of heavy rainfall events will change under different warming scenarios. The study warns that such events could pose serious risks for flooding, infrastructure damage, and public health, especially in urban areas.
"The scale helps communities know whether an #AtmosphericRiver will bring benefit or cause chaos: The storms can deliver much-needed #rain or snow, but if they're too intense, they can cause #flooding, #landslides and power outages, as California and Pakistan experienced."
#ClimateChange #ExtremePrecipitation
https://phys.org/news/2023-03-world-atmospheric-rivers-intensity-hurricanes.html
Atmospheric rivers, which are long, narrow bands of water vapor, are becoming more intense and frequent with climate change. A new study demonstrates that a recently developed scale for atmospheric river intensity (akin to the hurricane scale) can be used to rank atmospheric rivers and identify hotspots of the most intense atmospheric rivers not only along the U.S. West Coast but also worldwide.
“When we build a road, have we raised it so that we can get people off the barrier islands? When we build a performing arts center, is it going to survive the 2030’s and 2040’s?”
#SeaLevelRise
#StormSurge
#ExtremePrecipitation
#Florida
https://www.heraldtribune.com/story/news/climate-change/2023/02/13/climate-change-in-sarasota-water-poses-triple-threat/69886383007/