Caroline Leck holds a Professor position at the department of Meteorology Stockholm University in Sweden She has 20 years of experience in the field of couplings between biogeochemical cycling and climate with the emphasis on regions with a minimum of influences by man-made sources. Examples are cycling of sulfur and marine biogenic matter, which provides a still poorly understood link between cloud radiative properties and marine primary production. Leck's research has been conducted in an international and interdispplinary context and she has played a major role as deputy coordinator of the atmospheric program of three international Arctic Ocean Expeditions to the North Pole (IAOE-91; AOE-96; AOE-2001).