Alain Clappier

TL;DR: In this paper, a scheme to represent the impact of urban buildings on airflow in mesoscale atmospheric models is presented, where buildings are not explicitly resolved, but their effects on the grid-averaged variables are parameterised.

TL;DR: The Basel UrBan Boundary Layer Experiment (BUBBLE) was a year-long experimental effort to investigate in detail the boundary layer structure in the City of Basel, Switzerland as discussed by the authors.

TL;DR: In this paper, a new building energy model (BEM) is developed and implemented in an urban canopy parameterization (UCP) for mesoscale models, which accounts for: the diffusion of heat through walls, roofs, and floors; natural ventilation; the radiation exchanged between indoor surfaces; the generation of heat due to occupants and equipments; and the consumption of energy due to air conditioning systems.

TL;DR: In this paper, two sets of simulations were performed over the city of Athens (Greece): a first using a mesoscale model with a detailed urban surface exchange parameterisation (able to reproduce the surface exchanges better than the traditional method), and a second with the traditional approach.

TL;DR: In this paper, numerical simulations compared with field measurements are used to explain the effect of sea breezes on photochemical smog episodes in Athens during the Mediterranean Campaign of Photochemical Tracers on 12 and 14 September 1994.