Sensitivity of zonal winds
Jet stream response to Arctic temperature swings

New research shows that regional Arctic temperature swings can influence jet stream positions and speeds but only account for a small fraction of the jet variations, implying other factors are crucial for predicting jet stream behavior. 

Atlantic hurricanes
Atlantic overturning circulation and the recent decline of Atlantic major hurricane frequency

Using observations and a coupled Earth system model, a new study shows that the decline of the Atlantic major hurricane frequency during 2005–2015 is associated with a weakening of the AMOC.

Observed ocean-atmosphere anomaly patterns during multi-year La Niña event
Impact and predictability of multi-year La Niña events

New findings could improve our ability to predict both the strength and duration of US droughts caused by La Niña.

A Southern Ocean polynya
Modeling multidecadal cycles of Southern Ocean convection

Researchers observed a natural, regular, multidecadal oscillation between periods of Southern Ocean open-sea convection, which can act a release valve for the ocean’s heat, and non-convective periods.

monthly-mean analysis of oxygen isotopes in precipitation and gross primary productivity
Ice-core evidence for southward shifts of tropical rainfall in response to iceberg discharge during the last glacial period

The most extreme increases in the oxygen 18-to-16 ratio over the last fifty thousand years occur immediately after Heinrich events, strongly suggesting that tropical rainfall shifted south in response to Heinrich events.

Modes of Hadley Cell and ENSO
Finding parallels between Hadley Cell expansion and the global warming hiatus

As the decadal ENSO cycle transitions to a warm phase, a new study expects accelerated global warming and a “hiatus” in Hadley Cell expansion. 

Welcome to the US Climate Variability and Predictability Program

US CLIVAR celebrates 20 years

US CLIVAR 20th  anniversary

For the past 20 years, the US CLIVAR program has addressed some of the most pressing research questions to understand the climate system, particularly the great uncertainties related to the role of the ocean. To recognize the community and build on achievements, the program will host several events throughout the year. 

CLIVAR town hall & sessions at 2018 Ocean Sciences Meeting

Ocean sciences logo

At the 2018 Ocean Sciences Meeting, International and US CLIVAR will host a town hall on Thursday, February 15 at 12:45 pm on “CLIVAR’s Course: Accomplishments and Future Science Priorities.” Additional sessions relevant for the community have also been compiled. 

Research highlights year in review

Year in Review

Advancements in research into how the climate interacts with the Earth system are showcased in this collection of published highlights from 2017, featuring science conducted by members of the US CLIVAR community. 

US CLIVAR welcomes Dan Vimont as new chair of SSC

Dan Vimont, University of Wisconsin

Dan Vimont, University of Wisconsin-Madison, will serve as the new chair of the US CLIVAR Scientific Steering Committee (SSC) through 2018. The SSC chair directs US CLIVAR activities by advancing the Science Plan, identifying new opportunities for engagement, and serving as an ambassador for the program. 

Abstracts due Feb 28 for International AMOC Science Meeting

NOAA pier

On July 24-27, 2018, scientists will join together to exchange ideas and develop a better understanding of the Atlantic meridional overturning circulation (AMOC) and its influence on weather, climate, and ecosystems. The meeting will take place in Coconut Grove, Florida. Abstract submissions are due February 28. 

IV International Conference on El Niño-Southern Oscillation

El Nino

Abstracts are now being accepted for an international conference on ENSO in a Warmer Climate. The goal of the conference is to review progress on the science of ENSO with a focus on examining the range of ENSO “flavors.”