hurricane intensity
Causes of the weak relationship between tropical Atlantic sea surface temperature and hurricane intensification

Research shows that SST may explain a significantly smaller percentage of the variance in tropical cyclone intensification in the Atlantic as compared to the western North Pacific and eastern-central Pacific.

ecadal-scale correlations between northern Gulf of Mexico and global sea surface salinity and continental preciptiation
Precipitation and ocean circulation changes linked during the Little Ice Age

Researchers show that weakened surface ocean circulation coincides with precipitation during the Little Ice Age and is consistent with little-to-no changes in the larger Atlantic meridional overturning circulation. 

Carbon fluxes from the Southern Ocean to the atmosphere
Designing a carbon and heat observing system for the Southern Ocean

To better understand climate variability and the Southern Ocean, researchers estimate spatial correlations of ocean properties to reveal how many observing platforms are necessary to adequately observe carbon and heat.

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.

Welcome to the US Climate Variability and Predictability Program

Spring 2018 call for US CLIVAR-supported workshops

Ocean carbon hot spots workshop

Requests are now being accepted for US CLIVAR-sponsored workshops for 2018 and beyond. Submissions are encouraged from the US climate science community and their collaborators. All documents must be submitted by April 20. The next call for workshops will be in fall 2018. 

New large ensemble working group begins

Large ensemble map of precipitation

The US CLIVAR Working Group on Large “Initial-Condition” Earth System Model Ensembles was formed in March 2018 and will wrap up in three years. The intent of the working group is to spearhead a dedicated effort across the national and international climate communities to advance progress on identifying anthropogenic influences on weather and climate amidst the “noise” of internal variability. 

Joint Variations/Exchanges edition on sea level rise

sea level rise cover photo

The 2018 winter edition of Exchanges and Variations, joint between International and US CLIVAR, is themed "Sea Level Rise," with guest editor John Church, University of New South Wales. The issue discusses the latest research, evaluation of predictability, analysis of extreme events and surface waves, and examples of the impacts.

Welcome new SSC and Panel members

US CLIVAR summit participants

US CLIVAR welcomes new members to the leadership team and panels, who will help shape the science planning and implementation of program goals. 

Contribute a testimonial celebrating US CLIVAR

Researchers discussing science during a US CLIVAR workshop

In recognition of 20 years of advancing climate research, US CLIVAR is seeking testimonials from the community and agency sponsors who have helped shape the program. Read what the community has to say and please consider sharing your testimonial. 

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. 

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.”