Parcs

ID	TITEL	DATENTYP	AUTOR	JAHR
27622	Bibliographie NPHT	Project	Nationalparkrat Hohe Tauern	2013

Bemerkungen/Beschreibung

Technische Universität Wien, Dissertation: 1994, 108+40 pp
A process-orientated study was performed in clouds at an alpine high elevation site (Mt. Sonnblick). During four field campaigns from May 1991 to June 1992 simultaneous samples of cloud water, interstitial aerosols, gas phase compounds and wet precipitation (snow) within the cloud were collected during the different seasons of the year. The experiments were aimed at investigating into the scavenging efficiency of aerosol and gas phase constituents to the liquid phase (cloud water) and the transfer of liquid cloud droplets to precipitating ice crystals. A newly-designed active cloud water sampler was used for collecting subcooled cloud water droplets. The chemical composition of cloud water, aerosols, gasphase, snow and the meteorological situation during the field campaigns in the different seasons of the year is described. Cloud to snow ratios for sulfate were used to reconstruct the mixing ratio of sublimation grown ice phase and cloud water droplets during the riming process of the ice particles in the seeder - feeder mechanism. Aerosol scavenging coefficients were calculated for sulfate, nitrate, calcium, magnesium and lead particles. Aerosol scavenging was in the most cases the major mechanism for the incorporation of sulfate in cloud water. In some cases additional sulfate production from gasphase scavening was observed. Gas- liquid partitioning was calculated for sulfate and ammonium using Henry's law. This calculation resulted in an overestimation of cloud water concentrations, showing that the validity of Henrys law for bulk samples of cloud water to describe gas-aqueous partitioning in the atmosphere is limited.

Eintrag Nr. 13226

Multi-phase chemistry in the subcooled droplet regime at Mount Sonnblick (3106 m a.s.l., Salzburg, Austria) = Phasenverteilung von Schadstoffen in schneeliefernden Wolkensystemen am Hohen Sonnblick (3106 m, Salzburg, Österreich)