Topic
Numerical simulation of the climate system, from simple conceptual models to full Earth system models, used to project warming, ocean change and extremes.
Researchers at Cambridge and CIMAT used 6,000-year-old algae records to project Arctic winter sea ice about 1 million km2 below earlier estimates. They say the weighting narrows the uncertainty range by as much as 85%.
Reality
Thwaites Glacier kept losing ice for all 150 simulated years in three models with ocean melting set to zero, New Scientist reports. The setup is physically impossible, so it shows the glacier's momentum but not how much sea level will rise.
Reality
Danish Meteorological Institute researchers report that the AMOC starts strengthening within decades of global cooling in one climate model. Getting that cooling at 0.2C a decade would take carbon removal equal to current annual emissions.
Reality
Jha and Byrne varied the rate at which dry air mixes into convective plumes across ERA5 and CESM2, and found it significantly moves moist-heat extremes outside the tropics, which means a swept parameter sits underneath the wet-bulb projection.
Reality
Australia's climate simulator now offers one shared ISSM build, a Python interface and a community data pool to its ice-sheet researchers. Coupling that ice to the ocean and atmosphere inside ACCESS comes later.
Reality
A new model has the world's largest carbon sink turning into a source once concentrations start falling, with two heat-driven feedbacks amplifying the outgassing for centuries after net zero and capping what removal delivers.
Reality
Aksel Samuelsberg's group at Tromso put precipitating sea salt into a simple climate model and watched the freeze settle into the colder of two Snowball states, on the strength of a reflectance value measured in a lab.
Reality