The ESCOMPTE program: an overview

Cros, B.; Durand, Pierre; Cachier, H.; Drobinski, Philippe; Fréjafon, Emeric; Kottmeier, C.; Perros, P.; Peuch, Vincent-Henri; Ponche, Jean-Luc; Robin, D.; Saïd, F.; Toupance, G.; Wortham, Henri

doi:10.1016/j.atmosres.2003.05.001

Cited by 189 publications

(146 citation statements)

References 28 publications

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“…1). Indeed, in 2001, the ESCOMPTE projet (Cros et al 2004;Mestayer et al 2005), was conducted in June and July to improve the understanding and forecast of the main flow systems (sea-breeze and valley flow) and their role in the transport of moisture and pollutants in Southern France (region shown in the zoom of Fig. 1 where the large city of Marseille and its industrialized suburbs of Fos-Berre are major sources of pollutants).…”

Section: Measurementsmentioning

confidence: 99%

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North-western Mediterranean sea-breeze circulation in a regional climate system model

et al. 2017

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regional climate model (AORCM) coupling WRF and NEMO-MED12 in the frame of HyMeX/MED-CORDEX are compared. One result of this study is that these simulations reproduce remarkably well the intensity, direction and inland penetration of the sea breeze and even the existence of the shallow sea breeze despite the overestimate of temperature over land in both simulations. The coupled simulation provides a more realistic representation of the evolution of the SST field at fine scale than the atmosphereonly one. Temperature and moisture anomalies are created in direct response to the SST anomaly and are advected by the sea breeze over land. However, the SST anomalies are not of sufficient magnitude to affect the large-scale seabreeze circulation. The temperature anomalies are quickly damped by strong surface heating over land, whereas the water vapor mixing ratio anomalies are transported further inland. The inland limit of significance is imposed by the vertical dilution in a deeper continental boundary-layer.

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Section: Measurementsmentioning

confidence: 99%

“…1). A second reason is the availability of a large measurement dataset collected in the frame of the ESCOMPTE projet in 2001 (Cros et al 2004;Mestayer et al 2005) and available for model evaluation.…”

Section: Introductionmentioning

confidence: 99%

North-western Mediterranean sea-breeze circulation in a regional climate system model

et al. 2017

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“…This study will focus on the first half of IOP2 (20 -23 of June), in the following referred to as IOP2a. The first period of IOP2a consists of three days characterized by low to moderate westerly and northwesterly winds, followed by a day with decreasing wind speeds and a synoptic pattern favoring the development of a well-established sea breeze from the South West [Cros et al, 2004].…”

Section: The Escompte Campaignmentioning

confidence: 99%

“…Due to a highly variable terrain elevation, the resulting flows are complex, and therefore form a challenge for mesoscale meteorological modeling. For more detailed information about the ESCOMPTE campaign refer to [Cros et al, 2004]. During the summer of 2001, large quantities of instruments were deployed on a large number of fixed sites, airborne devices and mobile instruments.…”

Section: The Escompte Campaignmentioning

confidence: 99%

Modeling the energy balance in Marseille: Sensitivity to roughness length parameterizations and thermal admittance

Demuzere¹,

Ridder²,

Lipzig³

2008

J. Geophys. Res.

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[1] During the ESCOMPTE campaign (Experience sur Site pour COntraindre les Modeles de Pollution atmospherique et de Transport d'Emissions), a 4-day intensive observation period was selected to evaluate the Advanced Regional Prediction System (ARPS), a nonhydrostatic meteorological mesoscale model that was optimized with a parameterization for thermal roughness length to better represent urban surfaces. The evaluation shows that the ARPS model is able to correctly reproduce temperature, wind speed, and direction for one urban and two rural measurements stations. Furthermore, simulated heat fluxes show good agreement compared to the observations, although simulated sensible heat fluxes were initially too low for the urban stations. In order to improve the latter, different roughness length parameterization schemes were tested, combined with various thermal admittance values. This sensitivity study showed that the Zilitinkevich scheme combined with and intermediate value of thermal admittance performs best.

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“…Air quality modelling studies show that concentrations of pollutants above a city are characterized by large gradients due to high spatial and temporal variability of emission sources as well as complex flow patterns (Kambezis et al, 1995;Martilli et al, 2003;Sarrata et al, 2006;Menut et al, 2000;Cros et al, 2004). In addition, advective transport of pollutants emitted over a city can impact suburban areas.…”

Section: Introductionmentioning

confidence: 99%

Impact of urban parameterization on high resolution air quality forecast with the GEM – AQ model

Strużewska

Kaminski

2012

Atmos. Chem. Phys.

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Abstract. The aim of this study is to assess the impact of urban cover on high-resolution air quality forecast simulations with the GEM-AQ (Global Environmental Multiscale and Air Quality) model. The impact of urban area on the ambient atmosphere is non-stationary, and short-term variability of meteorological conditions may result in significant changes of the observed intensity of urban heat island and pollutant concentrations. In this study we used the Town Energy Balance (TEB) parameterization to represent urban effects on modelled meteorological and air quality parameters at the final nesting level with horizontal resolution of ∼5 km over Southern Poland. Three one-day cases representing different meteorological conditions were selected and the model was run with and without the TEB parameterization. Three urban cover categories were used in the TEB parameterization: mid-high buildings, very low buildings and low density suburbs. Urban cover layers were constructed based on an area fraction of towns in a grid cell. To analyze the impact of urban parameterization on modelled meteorological and air quality parameters, anomalies in the lowest model layer for the air temperature, wind speed and pollutant concentrations were calculated. Anomalies of the specific humidity fields indicate that the use of the TEB parameterization leads to a systematic reduction of moisture content in the air. Comparison with temperature and wind speed measurements taken at urban background monitoring stations shows that application of urban parameterization improves model results. For primary pollutants the impact of urban areas is most significant in regions characterized with high emissions. In most cases the anomalies of NO 2 and CO concentrations were negative. This reduction is most likely caused by an enhanced vertical mixing due to elevated surface temperature and modified vertical stability.

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The ESCOMPTE program: an overview

Cited by 189 publications

References 28 publications

North-western Mediterranean sea-breeze circulation in a regional climate system model

North-western Mediterranean sea-breeze circulation in a regional climate system model

Modeling the energy balance in Marseille: Sensitivity to roughness length parameterizations and thermal admittance

Impact of urban parameterization on high resolution air quality forecast with the GEM – AQ model

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