Lukas Zimmermann

TL;DR: In this article, a new drop-freezing instrument is presented, where freezing in closed tubes is detected automatically by a change in light transmission upon ice development, caused by the formation of air bubbles and crystal facets that scatter light.

TL;DR: In this article, the authors quantify the land-surface influence at Jungfraujoch hour by hour and detect the presence of anabatic winds on a daily basis during 2010-2011, but only from April to September.

TL;DR: In this paper, a coastal mountain observatory in northern Norway revealed a tripling in concentrations of ice nucleating particles (IN) active at −15 °C (IN-15) in oceanic air after about one day of passage over land.

TL;DR: In this paper, the authors made use of the fact that planar, branched ice crystals (e.g. dendrites) grow within a relatively narrow temperature range (i.e. −12 to −17 ∘ C) and can be analyzed individually for INPs using a field-deployable drop-freezing assay.

TL;DR: In this paper, the authors demonstrate that in practice, the 222Radon tracer method produces inaccurate results in case of nonhomogeneously spread emission sources, and propose a different approach to account for this.