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AGU: Geophysical Research Letters

 

Index Terms

  • Meteorology and Atmospheric Dynamics: Boundary layer processes
  • Atmospheric Composition and Structure: Aerosols and particles
  • Atmospheric Composition and Structure: Troposphere—constituent transport and chemistry

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 29, 1852, 4 PP., 2002
doi:10.1029/2002GL014897

Airborne Lidar and in-situ Aerosol Observations of an Elevated Layer, Leeward of the European Alps and Apennines

S. Nyeki

Inst. Environmental Res., Univ. of Essex, Colchester/Essex, England

K. Eleftheriadis

ERL, National Centre for Scientific Research, Demokritos, Athens, Greece

U. Baltensperger

Lab. Atmospheric Chemistry, Paul Scherrer Institute, Villigen, Switzerland

I. Colbeck

Inst. Environmental Res., Univ. of Essex, Colchester/Essex, England

M. Fiebig

Institute for Atmospheric Physics, DLR, Oberpfaffenhofen, Wessling, Germany

A. Fix

Institute for Atmospheric Physics, DLR, Oberpfaffenhofen, Wessling, Germany

C. Kiemle

Institute for Atmospheric Physics, DLR, Oberpfaffenhofen, Wessling, Germany

M. Lazaridis

Techn. Univ. Crete, Dept., Env. Eng., Chania, Greece

A. Petzold

Institute for Atmospheric Physics, DLR, Oberpfaffenhofen, Wessling, Germany

An elevated layer was observed during airborne lidar and in-situ aerosol measurements, leeward of the European Alps and Apennine mountains. The layer was encountered during the Mesoscale Alpine Program (MAP) in autumn 1999, and extended >200 km at an altitude ∼4100 m asl over the northern Adriatic sea. Detailed meteorological analysis suggested that mountain venting followed by advection was responsible for formation of the layer. Evidence for particle nucleation was found in six profiles, and was associated with regions of cloud outflow. Despite determination of the average aerosol mass concentration within the layer (∼1.8 (SO4) μg m−3), an estimate of export to the free troposphere was complicated by the complex structure of the planetary boundary layer.

Published 14 September 2002.

Citation: Nyeki, S., K. Eleftheriadis, U. Baltensperger, I. Colbeck, M. Fiebig, A. Fix, C. Kiemle, M. Lazaridis, and A. Petzold (2002), Airborne Lidar and in-situ Aerosol Observations of an Elevated Layer, Leeward of the European Alps and Apennines, Geophys. Res. Lett., 29(17), 1852, doi:10.1029/2002GL014897.

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