Helmuth Giehl

TL;DR: In this article, the authors show the four-dimensional (4-D) distribution of the Eyjafjallajokull volcanic cloud in the troposphere over Europe as observed by EARLINET during the entire volcanic event (15 April-26 May 2010).

TL;DR: In this paper, the authors used a dewpoint mirror instrument at the Zugspitze summit station to quantify the residual stratospheric component in stratospherically influenced air masses, however, the mixing of tropospheric air into the stratosphere intrusion layers must be taken into account.

TL;DR: In this article, the authors focus on the long-lasting background period since the late 1990s and 2006, in view of processes maintaining a residual lower-stratospheric aerosol layer in absence of major eruptions, as well as the period of moderate volcanic impact afterwards.