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Composition analysis of liquid particles in the Arctic stratosphere under synoptic conditions

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Weisser,  C.
Prof. Konrad Mauersberger, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Mauersberger,  Konrad
Prof. Konrad Mauersberger, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Schreiner,  Jochen
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Citation

Weisser, C., Mauersberger, K., Schreiner, J., Larsen, N., Cairo, F., Adriani, A., et al. (2006). Composition analysis of liquid particles in the Arctic stratosphere under synoptic conditions. Atmospheric Chemistry and Physics, 6(3), 689-696.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-8089-E
Abstract
Synoptic scale polar stratospheric clouds (PSCs) that formed without the presence of mountain lee waves were observed in early December 2002 from Kiruna/Sweden using balloon-borne instruments. The physical, chemical, and optical properties of the particles were measured. Within the PSC solid particles existed whenever the temperature was below the equilibrium temperature for nitric acid trihydrate and liquid particles appeared when the temperature fell below an even lower threshold about 3 K above the frost point with solid particles still present. The correlation of liquid supercooled ternary solution aerosols with local temperatures is a pronounced feature observed during this flight; average molar ratios H2O/HNO3 were somewhat higher than predicted by models. In addition HCl has been measured for the first time in liquid aerosols. The chlorine isotope signature served as a unique tool to identify unambiguously HCl dissolved in STS particles. Within a narrow temperature range of about three degrees above the frost point, the measured average amount of HCl in liquid particles is below 1 weight%.