Workshop on Future US Earth System Reanalysis

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Opening in summer 2021

Abstract Submission

Opening in early summer 2021

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Reanalysis of the Earth’s ocean, atmosphere, land, and ice conditions is a foundational tool for basic research in Earth sciences, the national forecasting enterprise, and the development and planning for large infrastructure projects in the private sector. The US research and operational agencies share a long history of producing highly impactful reanalysis products including: first model-based atmospheric reanalysis (NCEP/NCAR 1995), first coupled reanalysis (CFSR 2008), first reanalysis of the 20th century weather (20CR 2011), NASA’s family of Earth system reanalyses (MERRA 2011, MERRA-2 2017), North American regional reanalysis (NCEP/NOAA 2006), the eddy-resolving ocean reanalysis (NRL 2015), and the property (dynamics and kinematics) preserving global ocean-sea ice state estimate (ECCO 2019).

There is a wide variety of needs and constituencies for the continuous improvements in the US reanalysis efforts. In particular, a shared scientific vision for the future of the US reanalysis is needed to foster collaborations between major US agencies and research institutions as well as international cooperation.


This community workshop aims at developing a shared scientific, technological, and application vision for the future of the US reanalysis efforts. Specific goals include:

  1. Identify scientific goals for the next generation of reanalysis from the atmospheric, oceanographic, and cryosphere perspectives.
  2. Identify opportunities for exploiting technological advancements in Earth system models, data assimilation systems, observations, and computational infrastructure.
  3. Identify priorities and opportunities for tighter collaboration between the US institutions, the US and the international reanalysis communities, and between reanalysis and observational communities.


Outcomes of the workshop include a community consensus report to US CLIVAR with a set of recommendations for key ways to facilitate development of the next generation of Earth system reanalysis in the US over the next 5-10 years.

Target Participants

This workshop will be open to the broad Earth sciences community. Experts from data assimilation communities, operational and research centers, academia, and users of the reanalysis products are encouraged to attend. The Scientific Organizing Committee anticipates about 100 participants with a mix of in-person and virtual.


October 18-20, 2021. The organizing committee is aiming to host the workshop in a hybrid format at University Corporation for Atmospheric Research (UCAR), Center Green Campus, Boulder, Colorado, pending UCAR approval.

Abstract Submission and Registration

Abstract submission will open in early summer 2021 with registration to follow.

Workshop Format

Workshop will be conducted as a combination of plenary sessions, breakout discussion groups, poster presentations, and opportunities for informal discussions.

Scientific Organizing Committee

Sergey Frolov, CIRES/NOAA PSL (co-chair)
Cécile Rousseaux, USRA/NASA GMAO (co-chair)
Tom Auligne, JCSDA
Dick Dee, Planet A
Ron Gelaro, NASA GMAO
Patrick Heimbach, U. Texas
Isla Simpson, NCAR
Laura Slivinski, CIRES/NOAA PSL

Program Organizing Committee

Mike Patterson (US CLIVAR)
Jennie Zhu (US CLIVAR)


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 Diversity and inclusion are core values of the US CLIVAR Program. These values will be reflected through the planning and execution of the workshop.