 Hi, my name is Loïc Schmidli. I just completed a master thesis at the Pöltscher Institute in the chemistry group which is part of the Uschger Center for Climate Change Research. My thesis was about measuring black carbon in an ice core from the Lomonosophonac glacier in Svalbard. I measure black carbon concentration of other industrial era, so roughly from 1750 back to 2000 to see the human contribution in the black carbon budget. This ice core was drilled in March 2009 in Svalbard on the island of Spitzbergen and it was already analyzed for stable water isotopes and major ions, but only partly analyzed for black carbon, only for the period from 1950 to 2005, so my work here was to extend those measurements back to 70-50. Here is the code rule. I dismount to keep the ice samples in the ice core frozen because melting really disturbed the distribution of the species we analyzed. So these are my samples for today. What I have to do is to obviously melt them to obtain liquid samples, I just insert them into this water bath and I just warm it to 30 degrees. And right now I need to wait until the sample flow gets perfectly stable before turning the laser on. So now I'm going to start the measurement series of these samples. The most important graph in the software here is this lower panel in which you see the concentration of black carbon. In about two minutes it already counts 14,000 of particles, so it's really a high concentration sample. The purpose of my measurement is to address the human influence on black carbon, which is reflecting black carbon emission due to industrial activities, traffic and energy production.