The Polar and Arctic atmospheric research (PANDA) is a sub-group of the Institute of Atmospheric and Earth System Research / Physics, at the University of Helsinki (www.helsinki.fi/en/inar). We are also part of Finnish Academy Centre of Excellence in Atmospheric Science (www.atm.helsinki.fi/fcoe). Our group is trying to understand the interaction of biosphere, cryosphere and atmosphere and we focus on new particle formation in Arctic and polar atmosphere.