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.

Reconstruction of the weather on February 10, 1936 at 12 UTC
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.

A two-layer network model for Bayesian inference of the coupled regional flood duration scaling and atmospheric dynamic scaling of the flood duration.
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.

Schematic representation of the atmospheric “non-frontal” component
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.

Boxplots showing how well model forecasts capture the observations between the two winter seasons, 2016–17 minus 2015–16,
California winter precipitation linked to the Arctic Oscillation

California precipitation is well forecast when the Arctic Oscillation phase is correctly captured by a state-of-the-art forecast system, GloSea5.

Schematic representation of proposed dynamical mechanisms in summer.
The influence of Arctic amplification on mid-latitude summer circulation

Researchers conduct a comprehensive review of research on summer weather stalling, focusing on the influence of Arctic amplification and how it could interact with other factors influenced by climate change.

Welcome to the US Climate Variability and Predictability Program

2020 January Newsgram

The latest news, meetings, jobs, and funding opportunities for the climate science community in our January Newsgram.

Release of the Atmospheric Convection and Air-Sea Interactions over the Tropical Oceans. A US CLIVAR Workshop Report

Atmospheric Convection and Air-Sea Interactions over the Tropical Oceans. A US CLIVAR Workshop Report

The Atmospheric Convection and Air-Sea Interactions over the Tropical Oceans Workshop Report summarizes the May 2019 workshop held in Boulder, CO.

Surface Currents Workshop agenda and hotel blocks now available!

The draft agenda and hotel blocks for the Surface Currents Workshop are now available. General registration will remain open until capacity is reached.

Workshop on Societally-Relevant Multi-Year Climate Predictions

Registration is now open for the Multi-Year Workshop. Abstract deadline has been extended to January 17, 2020.

CLIVAR town hall & sessions at 2020 Ocean Sciences Meeting

2020 Ocean Sciences Meeting

The 2020 Ocean Sciences Meeting will be held February 16-21 in San Diego, California. We have started to put together a list of US CLIVAR-sponsored sessions along with Town Halls, events, workshops, and other sessions that may be of interested to the US CLIVAR community. This is an ongoing list that will be updated regularly.