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Towards the operational use of Doppler radar radial winds in HIRLAM
SMHI, Research Department, Atmospheric remote sensing.
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2011 (English)In: Atmospheric research, ISSN 0169-8095, E-ISSN 1873-2895, Vol. 100, no 2-3, 190-200 p.Article in journal (Refereed) Published
Abstract [en]

This article discusses the pre-operational development for data assimilation of radial wind observations in the High Resolution Limited Area Model (HIRLAM) at the Finnish Meteorological Institute (FMI). The HIRLAM variational data assimilation system includes all the needed tools for exploitation of radial wind observations. A measurement task designed especially for the radial wind data assimilation purposes has been implemented to the FMI radar network. Observation quality monitoring indicates that the main error sources for the radial wind observations are ground clutter and velocity ambiguity. The HIRLAM quality control procedures are able to detect and reject most of these erroneous observations. Impact studies show encouraging results. Surface verification indicates that the use of radar wind observations has a positive impact on 10 m wind forecasts. Precipitation forecasts are also slightly improved. Upper air verification shows positive impact on wind and temperature forecasts at the 925-700 hPa levels. (C) 2010 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2011. Vol. 100, no 2-3, 190-200 p.
Keyword [en]
Weather radar, Wind observation, Data assimilation, Impact study
National Category
Meteorology and Atmospheric Sciences
Research subject
Remote sensing
Identifiers
URN: urn:nbn:se:smhi:diva-525DOI: 10.1016/j.atmosres.2010.06.004ISI: 000290501600005OAI: oai:DiVA.org:smhi-525DiVA: diva2:805750
Available from: 2015-04-16 Created: 2015-04-15 Last updated: 2016-01-25Bibliographically approved

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