Dynamics, Aerosol, Cloud, And Precipitation Observations — Model assisted vertical in-situ investigation of aerosols, and aerosol-cloud-turbulence interactions in the Southern Hemisphere marine boundary layer 

Our knowledge concerning the microphysical properties (e.g., droplet size distribution) and phase state (liquid or frozen) of Southern Ocean (SO) clouds is still incomplete. This concerns especially the combined influences of aerosol particles, boundary layer dynamics, atmospheric and cloud turbulence, and thermodynamics. To scope with this issue TROPOS and NIWA plan to accompany the HALO mission HALO-South by combined ground-based in-situ and remote sensing as well as vertical sounding (e.g., balloon and UAV) activities. As during goSouth campaign in 2022, measurements of aerosol, cloud, thermodynamic and turbulence properties will be carried out. Main goals of the campaign are a) characterizing aerosol, CCN and INP properties in and above the marine boundary layer, b) quantify energy, moisture and particle fluxes, and c) identify aerosol, CCN and INP sources. Furthermore, it is planned to carry out similar atmospheric measurements in the marine environment with the German research vessel Sonne and to combine these with chemical and biological measurements of marine aerosol sources.

Ultimately, and in combination with the HALO-South campaign, the project will lead to a better understanding of aerosol-cloud-turbulence interactions in Southern Hemisphere marine boundary layers, and the relative influences of aerosol particle therein.

Platform: Land station

Location: Southern New Zealand Invercargill Area  

Timing: Austral spring 2025


  • Frank Stratmann (stratmann<@>tropos.de)
  • Patric Seifert (seifert<@>tropos.de)