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Extremes Working Group

The US 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 WG concluded their activities in 2015.

Scientific objectives include

  • Assess and synthesize existing knowledge base on the links between Large Scale Circulation Patterns (LSCP) and short term temperature and precipitation extremes.
  • Identify key questions and knowledge gaps.
  • Establish a methodology and research protocols for using the LSCP approach to analyzing extremes in observations and model output.
  • Provide a preliminary assessment of the ability of current models to reproduce the correct relationship between extremes and LSCs for North America.


Extremes Working Group
Matt Barlow, co-chair University of Massachusetts
Richard Grotjahn, co-chair University of California, Davis
Tony Barnston Columbia University/International Research Institute for Climate and Society
Robert Black Georgia Tech University
Mike Bosilovich NASA/GSFC
Tereza Cavazos ICIESE, Mexico
Joshua Xiouhua Fu University of Hawaii
Alexander Gershunov University of California, San Diego/SIO
Bill Gutowski Iowa State University
John Gyakum McGill University, Canada
Rick Katz NCAR
Arun Kumar NOAA/NCEP
Lai-Yung (Ruby) Leung Pacific Northwest National Laboratory
Russ Schumacher Colorado State University
Michael Wehner University of Berkeley/LBL