M. Hasel

Karlsruhe Institute of Technology

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Christoph Kottmeier

Karlsruhe Institute of Technology

Augustin Colette

Institut national de l'environnement industriel et des risques

J. Arteta

Centre National de Recherches Météorologiques

Aude Lemonsu

Météo-France

B. Cros

Université Paris 8

Olaf Eisen

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Andreas Wieser

Karlsruhe Institute of Technology

Alain Dabas

Météo-France

F. Saı̈d

Université Ibn-Tofail

G. Ancellet

Centre National de la Recherche Scientifique

Cooperative Institutions

Centre National de la Recherche Scientifique

Météo-France

Université de Toulouse

Université Toulouse III - Paul Sabatier

Institut Pierre-Simon Laplace

Laboratoire d'Aérologie

Centre National de Recherches Météorologiques

Université Paris Cité

Karlsruhe Institute of Technology

Centre d'Enseignement et de Recherche en Environnement Atmosphérique

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Regional transport and dilution during high‐pollution episodes in southern France: Summary of findings from the Field Experiment to Constraint Models of Atmospheric Pollution and Emissions Transport (ESCOMPTE)

Journal of Geophysical Research Atmospheres (2007)

P. Drobinski F. Saı̈d G. Ancellet J. Arteta Patrick Augustin

In the French Mediterranean basin the large city of Marseille and its industrialized suburbs (oil plants in the Fos‐Berre area) are major pollutant sources that cause frequent and hazardous pollution episodes, especially in summer when intense solar heating enhances the photochemical activity and when the sea breeze circulation redistributes pollutants farther north in the countryside. This paper summarizes the findings of 5 years of research on the sea breeze in southern France and related mesoscale transport and dilution of pollutants within the Field Experiment to Constraint Models of Atmospheric Pollution and Emissions Transport (ESCOMPTE) program held in June and July 2001. This paper provides an overview of the experimental and numerical challenges identified before the ESCOMPTE field experiment and summarizes the key findings made in observation, simulation, and theory. We specifically address the role of large‐scale atmospheric circulation to local ozone vertical distribution and the mesoscale processes driving horizontal advection of pollutants and vertical transport and mixing via entrainment at the top of the sea breeze or at the front and venting along the sloped terrain. The crucial importance of the interactions between processes of various spatial and temporal scales is thus highlighted. The advances in numerical modeling and forecasting of sea breeze events and ozone pollution episodes in southern France are also underlined. Finally, we conclude and point out some open research questions needing further investigation.

Sea breeze

10.1029/2006jd007494

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Sea ice growth in the eastern Weddell Sea in winter

Journal of Geophysical Research Atmospheres (2003)

Christoph Kottmeier Karoline Frey M. Hasel Olaf Eisen

The energy budget and the formation of sea ice in the eastern Weddell Sea west of Maud Rise are investigated on a regional scale on the basis of data obtained from drifting buoys deployed during the ANZFLUX project in 1994. A one‐dimensional model for snow‐covered sea ice and a kinematic‐thermodynamic sea ice model for ice formed in leads are coupled and run under atmospheric and oceanic conditions specified from in situ data. Flooding at the snow‐ice interface and snow ice formation need to be accounted for to achieve reasonable agreement between modeled and measured temperature distributions. The time‐averaged values for the net heat flux are 21 W m −2 , some 60% of which originate in refreezing leads, and 9.8 cm for the monthly rate of ice accumulation. Whereas leads contribute a net accumulation of 10.8 cm, the mass balance of consolidated, snow‐covered ice results in a net ablation of −1.0 cm. Sensitivity studies reveal the contribution of processes related to snow cover and ocean heat flux to sea ice formation and heat exchange. Without taking snow ice formation into account, a net ablation of −14.9 cm occurs under snow‐covered ice due to high oceanic heat fluxes. A comparison between a simple two‐layer model and the one‐dimensional thermodynamic model emphasizes the influence of heat storage in sea ice on the development of heat flux and ice thickness. The heat and mass fluxes obtained on a regional scale, and their sensitivity to the parameterizations, elucidate the implication of vigorous small‐scale processes on sea ice development and point out their importance for sea ice models.

Sea ice concentration

Ice-albedo feedback

10.1029/2001jc001087

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Airborne measurements of turbulent trace gas fluxes and analysis of eddy structure in the convective boundary layer over complex terrain

Atmospheric Research (2004)

M. Hasel Christoph Kottmeier U. Corsmeier Andreas Wieser

Convective Boundary Layer

Trace gas

Free convective layer

10.1016/j.atmosres.2004.06.010

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Citations (18)