Impact of ERS scatterometer winds in ECMWF’s assimilation system.
Open accessAbstract
The impact of ERS scatterometer winds on the European Centre for Medium‐Range Weather Forecasts (ECMWF) three‐dimensional variational (3D‐Var) and four‐dimensional variational (4D‐Var) assimilation systems is investigated. ERS scatterometer winds are found to be of consistent high quality in comparison to other surface wind observations. Both 3D‐Var and 4D‐Var systems assimilate the data well and a small, but significant, positive impact is found on medium‐range weather and wave forecasts. ERS scatterometer winds are not affected by rain or clouds, so they give valuable wind information near intense cyclones, tropical cyclones and in baro‐clinic regions. It is shown how the 4D‐Var method allows for dynamically consistent propagation of the surface wind information in the vertical. Four case studies that highlight important aspects of ERS scatterometer wind assimilation are presented. The main drawback for the ERS scatterometer instrument is the rather narrow swath compared with most other satellite instruments. Copyright © 2004 Royal Meteorological Society.
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Satellite scatterometer, altimeter, and synthetic aperture radar data are providing valuable assimilation constraints for wind and sea-state forecasts by NWP systems.
“However, satellite scatterometer, altimeter, and synthetic aperture radar data are providing valuable assimilation constraints for wind and sea-state forecasts by NWP systems (Isaksen and Janssen, 2004;Dragani et al., 2015).”
From The tropical atlantic observing system (2019) · cites this paper as Isaksen and Janssen, 2004
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The tropical atlantic observing system
Foltz, G. R., Brandt, P., Richter, I., Rodríguez-Fonseca, B., Hernandez, F., Dengler, M., Rodrigues, R. R., Schmidt, J. O., Yu, L., Lefevre, N., et al. (2019) · Frontiers in Marine Science · doi:10.3389/fmars.2019.00206 · Cited by 150 · see citing works
- Authors
- Isaksen, L., & Janssen, P. A. E. M.
- Affiliations
- European Centre for Medium-Range Weather Forecasts (GB)
- Corresponding author
- Isaksen, Lars
- Venue
- Quarterly Journal of the Royal Meteorological Society
- Publisher
- Wiley
- Published
- 2004-07
- Volume
- 130
- Issue
- 600
- Pages
- 1793-1814
- ISSN
- 0035-9009 (ISSN-L)
- 1477-870X
- OpenAlex
- W2012796394
- Cited by
- 54
- References
- 0
- Citations by year
- 2026: 3 · 2025: 3 · 2021: 2 · 2019: 3 · 2018: 2 · 2017: 2 · 2016: 5 · 2015: 2 · 2014: 2 · 2013: 2 · 2012: 3
- FWCI
- 3.16
- Type
- journal article
- Language
- en
- Open access
- green
- doi.org
- Locations
- Quarterly Journal of the Royal Meteorological Society (publishedVersion)
- European Centre for Medium-Range Weather Forecasts
- 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 › Earth and Planetary Sciences › Oceanography › Ocean Waves and Remote Sensing
- Keywords
- ERS scatterometer, scatterometer winds, data assimilation, 3D-Var, 4D-Var, ECMWF, medium-range weather forecasting, wave forecasting, tropical cyclones, cyclones
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