Working Groups

The US CLIVAR Arctic Change and Possible Influence on Mid-latitude Climate and Weather Working Group was formed in May 2015. The intent of the working group is to further the understanding of the coupling between Arctic variability and mid-latitude climate and weather.

The US CLIVAR Decadal Predictability Working Group was formed in January 2009.

The US CLIVAR Drought Working Group was formed in December 2006.

The US CLIVAR Eastern Tropical Oceans Synthesis (ETOS) Working Group (WG) was formed in 2012.

The US CLIVAR ENSO Diversity Working Group was formed in 2012 to clarify, coordinate and synthesize research to achieve a better understanding of ENSO diversity, including surface and sub-surface characteristics, tropical-extratropical teleconnections, physical mechanisms predictability, and relationship with climate change.

The U.S. CLIVAR Extremes Working Group was formed in 2012 to evaluate whether current climate models produce extremes for the right reasons and whether they can be used for predicting and projecting short-term extremes in temperature and precipitation over North America.

The U.S. CLIVAR Greenland Ice Sheet-Ocean Interactions Working Group was formed in December 2010. The overarching goal of this working group is to foster and promote interaction between the diverse oceanographic, glaciological, atmospheric and climate communities, including modelers and field and data scientists within each community, interested in glacier/ocean interactions around Greenland, to advance understanding of the process and ultimately improve its representation in climate models.

The US CLIVAR High Latitude Surface Flux Working Group was formed in January 2008, with the particular goal of addressing some of the myriad challenges associated with air-sea and air-ice-ocean exchanges in Arctic, Antarctic, and Southern Ocean regions. The working group activities are motivated by several identified deficiencies in estimates of high latitude surface fluxes (e.g., sensible and latent heat, radiative fluxes, stress, and gas fluxes).

The US CLIVAR Hurricane Working Group was formed in January 2011. The scientific objectives of this group include: (a) an improved understanding of interannual variability and trends in the tropical cyclone activity from the beginning of the 20th century to the present; (b) quantifying changes in the characteristics of tropical cyclones under a warming climate.

The US CLIVAR MJO Working Group was formed in June 2006. MJO Simulation Diagnostics (developed by the working group) are available at and hold promise in guiding future model testing and improvement as well as increased sub-seasonal forecast skill. The Working Group has now reformulated as a WCRP/WWRP-THORPEX YOTC Task Force. For additional information:

The US CLIVAR/OCB Ocean Carbon Uptake Working Group in 2012 in order to identify common metrics of physical ocean/climate forcing (primarily wind strength, mixed-layer stratification, and ocean mixing), compare metrics in the various models and in the observations for the North Atlantic and the Tropical Pacific, and coordinate model evaluation of the climatic influence on CO2 uptake at different time scales.

The US CLIVAR Salinity Working Group was formed in June 2005. During the two year life cycle of the working group, they examined the processes and mechanisms that link salinity, the water cycle, ocean circulation, and climate variability; tried to understand the trends and variability of sea surface salinity and subsurface salinity for different regions; identified the relations between salinity and temperature structure and variability; and determined what observations and monitoring requirements are necessary to ensure adequate salinity data products for future climate studies. After a successful workshop in May 2005, held at Woods Hole Oceanographic Institute, the working group's concluding report was published in July 2007.

The US CLIVAR/OCB Southern Ocean Working Group was formed in 2012 to Identify critical observational targets and develop data/model metrics based on the currently available observational data, both physical and tracer, and the assimilative modeling (re)analyses, and Evaluate and develop our understanding of the importance of mesoscale eddies in the heat and carbon uptake and of the response of the Southern Ocean to a changing climate, using high- resolution numerical studies and theory.

The US CLIVAR Western Boundary Current Working Group was formed in January 2007. The group was charged with identifying shortcomings in the atmosphere, ocean, and coupled models that need to be addressed to accurately model western boundary current atmosphere-ocean interaction. The group will be hosted a workshop in Phoenix, 15-17 January 2009. Additional information is available online.