Aerosol Chemical and Physical Properties Over an Ice-Free Region of the Arctic During the International Chemistry Experiment in the Arctic LOwer Troposphere (ICEALOT)

Atmospheric aerosol particles accumulate during the winter and spring in the Arctic resulting in a phenomenon referred to as "Arctic Haze". Measurements of aerosol properties coupled with chemical transport models are needed to understand changing trends in certain components of the "haze" as well as the climatic impact of these aerosols. During March and April of 2008, an International Chemistry Experiment in the Arctic Lower Troposphere (ICEALOT) was conducted aboard the R/V Knorr in the North Atlantic Ocean and the Greenland, Norwegian, and Barents Seas from 41-80 degrees N. Here we report the chemical and physical properties of the aerosol measured during the experiment. FLEXPART back trajectories will be used to assess aerosol sources to the Arctic.