Evaluation of the Weather Research and Forecast-Urban Model Over Greater ParisReport as inadecuate

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Boundary-Layer Meteorology

, Volume 149, Issue 1, pp 105–132

First Online: 27 July 2013Received: 06 July 2012Accepted: 04 July 2013


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.

KeywordsCORINE land-use Planetary boundary layer Urban canopy model  Weather Research and Forecast model  Download fulltext PDF

Author: Youngseob Kim - Karine Sartelet - Jean-Christophe Raut - Patrick Chazette

Source: https://link.springer.com/

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