Publications de Alain Clappier

Evidence of traffic-generated air pollution in Havana

François Golay, Alain Clappier, Jessie Madrazo Bacallao

In Havana, transport is blamed as a likely source of pollution issues. which is usually supported on arguments referring to a vehicle fleet mainly made of old cars (i.e., most models are American from the 1950s or Russian from the 1980s) with poor technica ...

2019

Low-cost methodology to estimate vehicle emission factors

Alain Clappier, Jessie Madrazo Bacallao

2018

Screening differences between a local inventory and the Emissions Database for Global Atmospheric Research (EDGAR)

François Golay, Alain Clappier, Jessie Madrazo Bacallao, Heydi Contreras Peraza

2018

Multi-scale modeling of the urban meteorology: Integration of a new canopy model in the WRF model

Alain Clappier, Dasaraden Mauree

Urban parametrizations have been recently developed and integrated in mesoscale meteorological models for a better reproduction of urban heat islands and to compute building energy consumption. The objective of the present study is to evaluate the value of ...

2018

On the Coherence in the Boundary Layer: Development of a Canopy Interface Model

Alain Clappier, Dasaraden Mauree

A 1D Canopy Interface Model (CIM) is developed to act as an interface between a meso-scale and a micro-scale atmospheric model and to better resolve the surface turbulent fluxes in the urban canopy layer. A new discretisation is proposed to solve the TKE e ...

Frontiers Media Sa2017

Road traffic emission inventory for air quality modelling and to evaluate the abatement strategies: a case of Ho Chi Minh City, Vietnam

Alain Clappier, Quoc Bang Ho

Elsevier2011

An evaluation of the estimation of road traffic emission factors from tracer studies

Alain Clappier, Luis Carlos Belalcazar Ceron

Road traffic emission factors (EFs) are one of the main sources of uncertainties in emission inventories; it is necessary to develop methods to reduce these uncertainties to manage air quality more efficiently. Recently an alternative method has been propo ...

Elsevier2010

A new building energy model coupled with an urban canopy parameterization for urban climate simulations-part I. formulation, verification, and sensitivity analysis of the model

Alain Clappier, Andrea Krpo

The generation of heat in buildings, and the way this heat is exchanged with the exterior, plays an important role in urban climate. To analyze the impact on urban climate of a change in the urban structure, it is necessary to build and use a model capable ...

2010

Estimation of road traffic emission factors from a long term tracer study

Alain Clappier, Erika Maria Zarate Torres, Minh Dung Ho, Luis Carlos Belalcazar Ceron

Road traffic emissions, one of the largest source categories in megacity inventories, are highly uncertain. It is essential to develop methodologies to reduce these uncertainties to manage air quality more effectively. In this paper, we propose a methodolo ...

Elsevier2009

Towards improving the simulation of meteorological fields in urban areas through updated/advanced surface fluxes description

Alain Clappier

The increased resolution of numerical weather prediction models allows nowadays addressing more realistically urban meteorology and air pollution processes. This has triggered new interest in modelling and describing experimentally the specific features an ...

Copernicus Publications2008

On the Sensitivity of Building Performance to the Urban Heat Island Effect

Alain Clappier, Darren Robinson, Adil Rasheed

Current practice in building simulation is to use historic climate data which has been measured in rural locations. However, numerous measurement programs have demonstrated that the urbanrural temperature difference can be of several degrees Kelvin, with c ...

EPFL2007

Air quality modelling over Bogota, Colombia: Combined techniques to estimate and evaluate emission inventories

Hubert van den Bergh, Alain Clappier, Erika Maria Zarate Torres, Luis Carlos Belalcazar Ceron

Two versions of the Emission Inventory (EI) are generated for the city of Bogota, Colombia. In the first version (EI-1), CORINAIR traffic emission factors (EFs) are used. In the second (EI-2), bulk traffic EF's calculated for the city, using in situ measur ...

Elsevier2007

The chemical mechanism generation programme CHEMATA-Part 2: Comparison of four chemical mechanisms for mesoscale calculation of atmospheric pollution

Martin Junier, Hubert van den Bergh, Alain Clappier

Elsevier2005

Improvements and applications of numerical transport algorithms in air quality models

Alain Clappier

EPFL1998