Impact of assimilation of Dopplar radial velocity on a variational system and on its forecasts

Fathalla A. Rihan, Chris G. Collier, Sue P. Ballard

Research output: Contribution to conferencePaperpeer-review

Abstract

An approach to the assimilation of Doppler radar radial winds into a high resolution Numerical Weather Prediction (NWP) model is described. In this paper, we discuss the types of errors which might occur in radar radial winds. A new approach to specifying the radial velocity observation error is proposed based upon the radial gradient of the velocity across the pulse volume. The variation of this error with range is derived for a specific case. The production of "super-observations" for the input to a 3D-Var assimilation system is discussed. Impact of the assimilation of Doppler velocities on the 3D-Var analysis and on the model forecasts, for a case study, is investigated.

Original languageEnglish
Pages1-13
Number of pages13
Publication statusPublished - 2005
Externally publishedYes
Event11th Conference on Mesoscale Processes and the 32nd Conference on Radar Meteorology - Albuquerque, NM, United States
Duration: Oct 24 2005Oct 29 2005

Other

Other11th Conference on Mesoscale Processes and the 32nd Conference on Radar Meteorology
Country/TerritoryUnited States
CityAlbuquerque, NM
Period10/24/0510/29/05

ASJC Scopus subject areas

  • Engineering(all)

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