[Zurück]

H. Grothe:
"Chapter 12. Laboratory Simulations";
in: "Spectroscopy of the atmospheres", R. Escribano, I. Tanarro (Hrg.); herausgegeben von: CSIC Madrid; CSIC Publishing, Madrid, 2010, (eingeladen), ISBN: 978-84-00-09209-2, S. 125 - 138.

The atmosphere exhibits strong fluctuations in temperature and chemical composition. Therefore, many aerosol particles are not in thermodynamic equilibrium with their environment. These non-equilibrium conditions influence the particle´s chemical
composition and phase as well as the morphology, the surface structure and finally the surface chemistry. These physicochemical properties cannot be determined in field measurements but are accessible by laboratory model experiments. In the framework of this paper different models for aerosol investigations are presented and
their assets and drawbacks are discussed.
In the past, aerosol constituents of different origin have been investigated. However, this article focuses particularly on the cryo-particles of the upper troposphere and the lower stratosphere. Thus, the main constituents are water ice and nitric acid hydrates besides traces of sulfuric acid and organic acids. Only recently
Murray (2008) has shown that cubic ice (i.e. the metastable modification of water ice at ambient pressure) has a good chance to exist in Cirrus Clouds. The same is also true for the Polar Stratospheric Clouds where metastable nitric acid hydrates
have been postulated. Hence, we are looking for laboratory models suitable for metastable icicles.

Projektleitung Hinrich Grothe:
Der Einfluss von biologischen Strukturen auf die Eisnukleation

Projektleitung Hinrich Grothe:
Der Einfluss von biologischen Strukturen auf die Eisnukleation - eine experimentelle Studie zur Klimaforschung

Projektleitung Hinrich Grothe:
Experimentelle und theoretische Studien an den Hydraten der Halogenoxide