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  • Fall 2017 American Geophysical Union

    • Dates: 11-15 December 2017
    • Location: New Orleans, Louisiana, USA
    • Abstract Submission Deadline: 2 August 2017
    • Submit your abstract to AGU Session 25961 Progress in Reanalysis: Development, Evaluation, and Application by 2 August 2017
      Reanalysis is a scientific method for producing a physically complete estimation of the past state and variability of geophysical systems. Over the last decade, reanalysis data sets has have become a popular tool addressing multiple purposes in weather and climate sciences. Reanalyses are employed as a basis for applications building on long-term gridded data sets, as "true state" estimates in assessing the fidelity of model simulations, or as a source of information when studying short-term variability and long-term changes of the climate system. Continuous developments of reanalysis systems and the production of new global and regional data sets provide constant improvements of quality which are evaluated using independent observations and intercomparison approaches. 
      The session therefore welcomes contributions on new developments, evaluation and intercomparison as well as applications of reanalyses. We welcome contributions from all types of reanalyses, including but not limited to global, regional, atmospheric, ocean, and coupled reanalysis systems.
    • Submit your abstract to AGU Session 25204 Advances in Integrated Observations, Modeling and Predictions for Weather, Climate and Impact Assessments by 2 August 2017

      Improved observational, modeling and prediction systems are essential for assessing vulnerability leading to water security issues. In that regard, atmospheric and terrestrial processes and their long-term interactions need to be understood to better support policies on water management. Additionally, the development of new technologies and strategies to improve the collection and distribution of observations is central for adaptation and mitigation of the impacts from severe weather events to climate extremes.

      Contributions are invited that demonstrate the use of observations and models in addressing extreme hydrometeorological events. Experts in developing observational and information systems are invited to discuss ways to increase their effectiveness. In particular, presentations on advances being made in integrating observations from various sources, such as citizen weather observer programs, are welcome. Educators and students involved in outreach and extension programs on Earth observing systems for weather, climate and hydrological studies are also invited to contribute to this session.

    • Website:
  • 5th International Conference on Reanalysis (ICR5)

    • Dates: 13-17 November 2017
    • Location: Rome, Italy
    • Abstract Submission Deadline: has passed
    • Website: ICR5
  • October 23-27, 2017: S-RIP 2017 Workshop & SPARC Data Assimilation Workshop
    • Location: ECMWF, UK
    • Website: S-RIP
  • June 29-30, 2017: COST/CLIVAR Workshop on Ocean Reanalyses and Inter-comparison (ORA-IP), Toulouse (France). Supported by EU EOS/COST and CLIVAR/GSOP.


  • December 12-16, 2016: AGU Fall Meeting - Evaluating Reanalysis: Learning about past weather and climate, San Francisco, CA.
  • October 19-21 [Wed-Fri], 2016: SPARC Reanalysis Intercomparison Project (S-RIP) 2016 Workshop, Victoria, Canada.

    • The SPARC Data Assimilation (DA) workshop will be held at the same place during 17-19 October 2016 [Mon-Wed], with a one-day joint S-RIP - SPARC-DA session on 19 October 2016 [Wed]. 

    • Important deadlines: 30 June 2016 (travel support application - see the first circular); 31 August 2016 (room reservation, abstract submission, and registration). 

    • See the workshop website at:

  • October 18 - 21, 2016: International workshop on coupled data assimilation.
    Hosted at Météo-France, 
    Toulouse, France  
    Registration is now open.
    Main topics are:
    • Data assimilation methods for coupled systems ( DAM )
    • Observations in coupled data assimilation ( OBS )
    • Role of forecast model in coupled data assimilation ( RFM )
    • Applications and current initiatives ( ACI )(Including coupled reanalysis)
  • May 12, 2016 American Wind Energy Association (AWEA) Webinar on on the statu of reanalyses use in wind energy calculations  Link


  • January 10-14, 2016: AMS Annual Meeting - Sessions on Reanalysis , New Orleans, Louisiana.

20th Century Reanalysis: Methods and Applications
To better understand and model the observed variability of the earth system, one can rapidly expand the available record by objectively combining disparate observations with numerical model-generated guesses. The "reanalyses" or "syntheses" of atmospheric, oceanic, land, and cryospheric observations generated by such a data assimilation process provide comprehensive physically consistent descriptions of evolving system states. Such widely used datasets have become essential to the study of the earth system on timescales from hours to a century. However, they are not without room for improvement. This session welcomes all contributions on applications of reanalysis data, on comparisons of reanalyses and observations, on advancing reanalysis methodology, and on issues in using reanalysis for weather and climate problems.

Earth System Climate Reanalyses: Low Frequency Variability and Trends
The last three decades have been marked by major shifts in a number of climate modes of variability including the Atlantic Multi-decadal Oscillation and the Pacific Decadal Oscillation – shifts that have been linked to changes in drought and weather extremes throughout the world, as well as the recent hiatus in long-term surface temperature trends. Reanalyses offer a dynamically and physically consistent global interdisciplinary framework for assessing and understanding the nature of such regional changes. This session seeks contributions that take advantage of reanalyses of observations to address various aspects of climate variability and change as outlined above. This includes comparisons between the multi-disciplinary set of reanalyses of the Earth System(e.g. land, ocean, aerosol and cryosphere) and observations, downscaling of reanalyses including an assessment of changes in weather extremes, modeling (e.g., AGCM) studies that put the reanalysis results in the context of underlying climate uncertainty, as well as studies that seek to assess, understand and/or correct inhomogeneities that limit the usefulness of reanalyses for assessing low frequency variability and trends including efforts to improve the ability to produce consistent reanalyses of the coupled climate system. and choose one of the above topics

Deadline for abstract: has passed


  • December 14-18, 2015: AGU Fall Meeting - Session on Reanalysis Evaluation and Intercomparison, San Francisco, California.

Evaluating Reanalysis: What Can We Learn about Past Weather and Climate? (Monday, 14 Dec.) (Monday, AM 1: Oral) (Monday, AM 2: Oral) (Monday, PM: Poster) 

The session welcomes contributions on the evaluation and intercomparison of reanalyses, including global, regional, atmospheric, ocean, and coupled reanalyses. In particular, intercomparison of multiple reanalyses and comparisons with independent (non-assimilated) data are encouraged.

Deadline for abstract: has passed


The workshop will focus upon the progress of S-RIP Report Chapters on the current and past reanalyses to SPARC.

This workshop will overlap with the SPARC Data Assimilation worksop which begins on September 8-10, 2014.

Both workshops will be held at the NOAA Center for Climate and Weather Prediction in College Park, Maryland, USA.

Information about the workshops, registration, directions, etc can be found on the meeting website.


  • April 29-May 1, 2013: SPARC Reanalysis/analysis Intercomparison Project (S-RIP) Planning Meeting in Exeter, UK.

    The scientific objectives, scope and aims of the meeting appear on the meeting website  

    Important Additional Information:  
      The meeting is open to all, but since space is limited all participants must register. To do this, please  send the following information to Name, 2: Email address, 3: Affiliation, 4: Title and short abstract (if you are submitting a poster))  .

    Information on travelling to the Met Office is found   at the meeting webpage.

  • June 17-21, 2013: American Meteorological Society Conference on the Middle Atmosphere, Newport, Rhode Island, USA. Members of the SPARC Data Assimilation Working Group are encouraged to submit abstracts (there shall be no separate SPARC Data Assimilation Workshop in 2013). Special sessions on Data Assimilation will be convened at the conference, provided enough relevant abstracts are submitted. A side meeting will be organised to discuss SPARC Data Assimilation Working Group-related business.


  • October 7-11 2013: Sixth WMO Symposium on Data Assimilation, College Park, Maryland, USA
    Symposium Goals:
    (1) Assess recent progress in atmospheric, oceanographic, and hydrologic data assimilation, in both research and operational environments.
    (2) Reach common understanding of the main challenges and opportunities that lie ahead in data assimilation.
  • December 9-13 2013: AGU Fall Meeting - Session on Atmospheric Reanalysis, San Francisco, California, USA
    The session is open to contributions on current reanalysis developments including data assimilation, ensemble methods, coupled reanalysis, regional reanalysis, and the evaulation of reanalysis products. We especially encourage contributions on the verification of reanalyses using independent observations.
    We will have invited contributions from the following authors:
    - Michael Bosilovich (NASA) - Earth System reanalysis
    - Gil Compo (NOAA) - Sparse Input Reanalysis




Legler, D., Dole R., 2011: Identifying Challenges and Opportunities for Earth System Reanalyses. EOS Transactions, 92, 172.

Legler D., Dole R., Allan R., Compo G., Carton J., 2011:  Evaluation of Reanalyses – Developing an Integrated Earth System Analysis (IESA) Capability Workshop and the 3rd Atmospheric Circulation Reconstructions over the Earth (ACRE) Workshop: Reanalysis and Applications. US Clivar Variations, 9, 5-6, May 2011.

Allan R., Compo G., Carton J., 2011: Recovery of Global Surface Weather Observations for Historical Reanalyses and International Users, EOS Transactions, 92, 154.

Legler D., Dole R., Allan R., Compo G., Carton J., 2011:  Evaluation of Reanalyses – Developing an Integrated Earth System Analysis (IESA) Capability Workshop and the 3rd Atmospheric Circulation Reconstructions over the Earth (ACRE) Workshop: Reanalysis and Applications. US Clivar Variations, 9, 5-6, May 2011. 


Meeting and other Presentations

Webinar:  Reanalysis Research: Laying the Groundwork for the Next Generation of NOAA Reanalyses. 24 June 2014, 2-3pm Eastern Daylight Time. Download mp4 recording.

By Topics (in progress)

Reanalysis Overviews:

Observational Data

  Data Recovery

Extremes and Variability

Specific Events

Outreach and Education


Masatomo Fujiwara (not verified)

Mon, 06/17/2013 - 18:44

A report manuscript for the S-RIP Planning Meeting (April 29-May 1, 2013) is now available at

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