Cited by 24,480Meteorological Phenomena and SimulationsOceanographic and Atmospheric ProcessesClimate variability and models

The ERA‐Interim reanalysis: configuration and performance of the data assimilation system

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Dee, D. P., Uppala, S. M., Simmons, A. J., Berrisford, P., Poli, P., Kobayashi, S., Andrae, U., Balmaseda, M. A. +28 more·2011·Quarterly Journal of the Royal Meteorological Society

Abstract

ERA‐Interim is the latest global atmospheric reanalysis produced by the European Centre for Medium‐Range Weather Forecasts (ECMWF). The ERA‐Interim project was conducted in part to prepare for a new atmospheric reanalysis to replace ERA‐40, which will extend back to the early part of the twentieth century. This article describes the forecast model, data assimilation method, and input datasets used to produce ERA‐Interim, and discusses the performance of the system. Special emphasis is placed on various difficulties encountered in the production of ERA‐40, including the representation of the hydrological cycle, the quality of the stratospheric circulation, and the consistency in time of the reanalysed fields. We provide evidence for substantial improvements in each of these aspects. We also identify areas where further work is needed and describe opportunities and objectives for future reanalysis projects at ECMWF. Copyright © 2011 Royal Meteorological Society

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Crossref · 10.1002/qj.828

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  • Clear-sky radiances from SSM/I and SSMIS were directly assimilated in ERA-Interim over the ocean, but not SMMR radiances.

    “We note that clear-sky radiances from SSM/I and SSMIS were directly assimilated in ERA-Interim over the ocean (Dee et al., 2011) but not SMMR radiances (P. Poli, personal communication, 2018).”

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Authors
Dee, D. P., Uppala, S. M., Simmons, A. J., Berrisford, P., Poli, P., Kobayashi, S., Andrae, U., Balmaseda, M. A., Balsamo, G., Bauer, P., Bechtold, P., Beljaars, A. C. M., van de Berg, L., Bidlot, J., Bormann, N., Delsol, C., Dragani, R., Fuentes, M., Geer, A. J., Haimberger, L., Healy, S. B., Hersbach, H., Hólm, E. V., Isaksen, L., Kållberg, P., Köhler, M., Matricardi, M., McNally, A. P., Monge‐Sanz, B. M., Morcrette, J. ‐., Park, B. ‐., Peubey, C., de Rosnay, P., Tavolato, C., Thépaut, J. ‐., & Vitart, F.
Affiliations
  • European Centre for Medium-Range Weather Forecasts (GB)
  • Japan Meteorological Agency (JP)
  • Swedish Meteorological and Hydrological Institute (SE)
  • University of Vienna (AT)
  • Korea Meteorological Administration (KR)
Corresponding author
Dee, D. P.
Venue
Quarterly Journal of the Royal Meteorological Society
Publisher
Wiley
Published
2011-04
Volume
137
Issue
656
Pages
553-597
ISSN
  • 0035-9009 (ISSN-L)
  • 1477-870X
OpenAlex
W2121745948
Cited by
24,480
References
0
Citations by year
2026: 360 · 2025: 596 · 2024: 926 · 2023: 1376 · 2022: 2084 · 2021: 2697 · 2020: 2705 · 2019: 2747 · 2018: 2600 · 2017: 2202 · 2016: 1987 · 2015: 1529 · 2014: 1221 · 2013: 855 · 2012: 483
FWCI
505.51
Type
journal article
Language
en
Open access
Locations
  • Quarterly Journal of the Royal Meteorological Society (publishedVersion)
  • BIRD (Basque Center for Applied Mathematics) (acceptedVersion, cc-by-nc-sa)
  • CentAUR (University of Reading) (acceptedVersion)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, cc-by-nc-sa)
Funders
Natural Environment Research Council (ncas10009, NE/F004575/1)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Meteorological Phenomena and Simulations
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
  • Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
Keywords
ERA-Interim reanalysis, atmospheric reanalysis, data assimilation, ERA-40, forecasting models, water cycle, stratospheric circulation, ECMWF

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