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Representation of background error standard deviations in a limited area model data assimilation system
SMHI, Research Department, Meteorology.
SMHI, Research Department, Meteorology.
2006 (English)In: Tellus. Series A, Dynamic meteorology and oceanography, ISSN 0280-6495, E-ISSN 1600-0870, Vol. 58, no 4, p. 430-444Article in journal (Refereed) Published
Abstract [en]

Two different approaches for improving the representation of background error standard deviations have been developed and introduced into the HIRLAM high-resolution limited area model 3-D variational data assimilation scheme. One of the methods utilizes a horizontally varying climatological background error standard deviation field, estimated from a time-series of innovations. The second approach attempts to take temporal and spatial variations of the background error standard deviations into account by applying an Eady instability measure to the background field. The two approaches are described in detail and their functionality is demonstrated. Parallel data assimilation and forecasts experiments indicate a slightly positive impact on average verification scores, and in addition a positive impact is demonstrated for an individual synoptically active case.

Place, publisher, year, edition, pages
2006. Vol. 58, no 4, p. 430-444
National Category
Meteorology and Atmospheric Sciences
Research subject
Meteorology
Identifiers
URN: urn:nbn:se:smhi:diva-791DOI: 10.1111/j.1600-0870.2006.00190.xISI: 000239561600002OAI: oai:DiVA.org:smhi-791DiVA, id: diva2:807048
Available from: 2015-04-22 Created: 2015-04-22 Last updated: 2020-05-13Bibliographically approved

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Lindskog, MagnusGustafsson, Nils

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
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  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
  • html
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