Chemistry and aerosols in the marine boundary layer: 1-D modelling of the three ACE-2 Lagrangian experiments

Karsten Suhre, Vincent Crassier, Céline Mari, Robert Rosset, Doug W. Johnson, Simon Osborne, Robert Wood, Meinrat O. Andreae, Brian Bandy, Timothy S. Bates, Steven Businger, Christian Gerbig, Frank Raes, Jochen Rudolph

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Abstract

Three Lagrangian experiments were conducted during IGAC's second aerosol characterization experiment (ACE-2) in the area between Portugal, Tenerife and Madeira in June/July 1997. During each Lagrangian experiment, a boundary layer air mass was followed for about 30 h, and the temporal evolution of its chemical and aerosol composition was documented by a series of vertical profiles and horizontal box pattern flown by the Meteorological Research Flight research aircraft Hercules C130. The wealth of observational data that has been collected during these three Lagrangian experiments is the basis for the development and testing of a one-dimensional Lagrangian boundary layer model with coupled gas, aqueous, and aerosol phase chemistry. The focus of this paper is on current model limitations and strengths. We show that the model is able to represent the dynamical and chemical evolution of the marine boundary layer, in some cases requiring adjustments of the subsidence velocity and of the surface heat fluxes. Entrainment of a layer rich in ozone and carbon monoxide from a residual continental boundary layer into the marine boundary layer as well as in-cloud oxidation of sulphur dioxide by hydrogen peroxide are simulated, and coherent results are obtained, concerning the evolution of the small, presumably sulphate-ammonia aerosol mode. Copyright (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)5079-5094
Number of pages16
JournalAtmospheric Environment
Volume34
Issue number29-30
Publication statusPublished - Oct 2000
Externally publishedYes

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Keywords

  • Aerosol
  • Lagrangian
  • Marine boundary layer

ASJC Scopus subject areas

  • Environmental Science(all)
  • Atmospheric Science

Cite this

Suhre, K., Crassier, V., Mari, C., Rosset, R., Johnson, D. W., Osborne, S., Wood, R., Andreae, M. O., Bandy, B., Bates, T. S., Businger, S., Gerbig, C., Raes, F., & Rudolph, J. (2000). Chemistry and aerosols in the marine boundary layer: 1-D modelling of the three ACE-2 Lagrangian experiments. Atmospheric Environment, 34(29-30), 5079-5094.