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Evaluation of the Weather Research and Forecast/Urban Model Over Greater Paris

Authors
  • Kim, Youngseob1
  • Sartelet, Karine1
  • Raut, Jean-Christophe2
  • Chazette, Patrick3
  • 1 Université Paris-Est, CEREA, Joint Research Laboratory, École des Ponts ParisTech/EDF R&D, 6-8 Avenue Blaise Pascal, Cité Descartes, Champs-sur-Marne, Marne la Vallée Cedex 2, 77455, France , Marne la Vallée Cedex 2 (France)
  • 2 Université Paris 6, Laboratoire Atmosphères Milieux Observations Spatiales (LATMOS), Laboratoire Mixte UPMC-UVSQ-CNRS, UMR 8190, 4 Place Jussieu, Paris, 75252, France , Paris (France)
  • 3 CEA Saclay, Laboratoire des Sciences du Climat et de l’Environnement (LSCE), Laboratoire Mixte CEA-CNRS-UVSQ, Gif-sur-Yvette, 91191, France , Gif-sur-Yvette (France)
Type
Published Article
Journal
Boundary-Layer Meteorology
Publisher
Springer Netherlands
Publication Date
Jul 27, 2013
Volume
149
Issue
1
Pages
105–132
Identifiers
DOI: 10.1007/s10546-013-9838-6
Source
Springer Nature
Keywords
License
Green

Abstract

Meteorological modelling in the planetary boundary layer (PBL) over Greater Paris is performed using the Weather Research and Forecast (WRF) numerical model. The simulated meteorological fields are evaluated by comparison with mean diurnal observational data or mean vertical profiles of temperature, wind speed, humidity and boundary-layer height from 6 to 27 May 2005. Different PBL schemes, which parametrize the atmospheric turbulence in the PBL using different turbulence closure schemes, may be used in the WRF model. The sensitivity of the results to four PBL schemes (two non-local closure schemes and two local closure schemes) is estimated. Uncertainties in the PBL schemes are compared to the influence of the urban canopy model (UCM) and the updated Coordination of Information on the Environment (CORINE) land-use data. Using the UCM and the CORINE land-use data produces more realistic modelled meteorological fields. The wind speed, which is overestimated in the simulations without the UCM, is improved below 1,000 m height. Furthermore, the modelled PBL heights during nighttime are strongly modified, with an increase that may be as high as 200 %. At night, the impact of changing the PBL scheme is lower than the impact of using the UCM and the CORINE land-use data.

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