Aerosol processes in the planetary boundary layer : high resolution aerosol mass spectrometry on a Zeppelin NT airship / Florian Rubach. 2013
Content
Contents
Abstract
1 Introduction
1.1 Atmospheric aerosol and its relevance
1.2 Aerosol properties
1.3 Aerosol mass spectrometry
1.4 Pan-European gas-aerosols-climate interaction study (PEGASOS)
1.5 Planetary boundary layer (PBL)
1.6 Focus of this work
2 Experimental section
2.1 PEGASOS campaigns
2.2 Airship Zeppelin NT as a measurement platform
2.3 The SOA cabin layout
2.4 The Aerosol Mass Spectrometer (AMS)
2.4.1 Quantification
2.4.2 Calibration procedures
2.4.2.1 Flow calibration
2.4.2.2 Velocity calibration
2.4.2.3 Ionization efficiency calibration
2.4.2.4 Thresholding-related calibrations
2.4.3 Mass spectra interpretation
2.5 Adaptation of the Aerosol Mass Spectrometer to Zeppelin requirements
2.5.1 Mounting in a 19 inch Rack
2.5.2 Technical changes
2.5.2.1 Turbomolecular pumps
2.5.2.2 Mass spectrometer
2.5.2.3 Data acquisition
2.5.2.4 Valve control
2.5.3 Changes of measurement technology
2.6 Performance of the new instrument
2.7 Aerosol hygroscopicity
3 Observations
3.1 Height profiling
3.1.1 Rotterdam: 2012-05-21, Flight No. 11
3.1.2 Rotterdam: 2012-05-24, Flight No. 14
3.1.3 Ozzano: 2012-06-20, Flights No. 27+28
3.1.4 Ozzano: 2012-07-03, Flight No. 40
3.2 Transects
4 Results and Discussion
4.1 Comparison with particle number based measurements
4.2 Chemical composition in the east- and southbound campaigns
4.3 Chemical composition and hygroscopicity
4.3.1 Compound contributions to hygroscopicity
4.3.2 Predicted CCN activities of encountered aerosol
4.4 Aerosol composition differences inside and outside of the mixing layer
4.5 Local production vs. Transport
4.6 Aerosol ion balance
5 Conclusions
Nomenclature
Bibliography
A Flight tracks
B Hygroscopicity parameter time series
Acknowledgements