How short-term Arctic warming can lead to delayed stratospheric circulation responses
A recent study uses large ensembles of an idealized general circulation model to demonstrate how episodic surface warming in the Arctic can lead to delayed responses in the stratosphere that persist for about two months, even in the absence of stationary waves.
Coral reconstructions of central tropical Pacific climate suggest a 25% increase in recent El Niño Southern Oscillation intensity
Comparison of the fossil corals samples with modern corals showed that the recent ENSO intensification was quite apparent – the most recent 20 years was stronger than almost all 20-year periods measured over the entire preindustrial fossil coral dataset.
Swiftly shifting southward: CO2-forced tropical widening is larger in the Southern Hemisphere
Under exclusive CO2 forcing, climate models predicted twice as much Hadley cell expansion in the Southern Hemisphere as in the Northern Hemisphere. The finding was robust across models and all seasons except boreal fall.
Reconstructing the past 200 years of global weather
A new version 3 of the NOAA-CIRES-DOE 20th Century Reanalysis (20CRv3) recreates a 180-year history of temperature, precipitation, winds, humidity, and many other variables from below the land surface to the top of the atmosphere.
Governance of Long-Duration Floods
A Bayesian network inference model was developed to account for and predict the likelihood of floods of various durations using physics informed predictors. The model provides a deeper understanding of the nexus of antecedent flow regime, atmospheric blocking, and moisture transport/release mechanisms.
New perspectives regarding Gulf Stream and Kuroshio Extension influence on the atmosphere
New research illustrates that the key to recognizing the influence of the Gulf Stream and Kuroshio Extension on the seasonal mean and longer-term climate is through a proper understanding of how the ocean influences atmospheric fronts.
