Polarstern cruises

The matter and energy exchange between ocean and atmosphere plays an important rule for the physical and chemical development of the climate system earth.

For a comprehensive investigation of the physical and chemical properties of submicron marine aerosol particles in the marine boundary layer measurements with a great number of instruments of TROPOS are performed during the measuring campaign ANT-XXVII/4, ANT-XXVIII/1, ANT-XXVIII/5 and XXIX/1 aboard the research vessel Polarstern.

Presently the following measurement instruments are integrated in the aerosol container:

  • Particle number size distribution with the SMPS (Scanning Mobility Particle Sizer) and the APS (Aerodynamic Particle Sizer)
  • Optical properties like spectral scattering coefficient with the Integrating Nephelometer, absorption coefficient with the PSAP (Particle Soot Absorption Photometer) and with the MAAP (Multi Angle Absorption Photometer)
  • Hygroscopic particle growth of marine aerosol particles with the HTDMA (Hygroscopicity Tandem Differential Mobility Analyzer)
  • Chemical composition of marine aerosol particles with the HR-ToF-AMS (High Resolution Time-of-Flight Aerosol Mass Spectrometer)
  • Activation of marine aerosol particle to cloud droplets with the CCNc (Cloud Condensation Nuclei Counter)

A comprehensive data set was collected and is studied scientifically to investigate the physical and chemical properties of marine aerosol over the Atlantic Ocean under different atmospheric conditions.