Mass-size distributions of selected nutrient elements in aerosols and their air-to-sea fluxes to the Arctic Ocean: Preliminary results from the US GEOTRACES Arctic Cruise in summer 2015.

Yuan Gao1, Clifton S Buck2, Christopher M Marsay2, Pami Mukherjee3 and William M Landing4, (1)Rutgers University Newark, Department of Earth and Environmental Sciences, Newark, NJ, United States, (2)Skidaway Institute of Oceanography, Savannah, GA, United States, (3)Rutgers University Newark, Newark, NJ, United States, (4)Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States
Abstract:
An important parameter in quantifying atmospheric deposition of trace elements (TEs) to the ocean is the size of aerosol particles that TEs are associated with. The size distributions of aerosol particles affect dry deposition by affecting dry deposition velocity and wet deposition by affecting the efficiency of precipitation scavenging. Aerosol particle sizes also affect the formation and development of marine clouds. The Arctic Ocean receives the atmospheric input of TEs from the surrounding continents through long-range transport of aerosol particles, affecting the Arctic Ocean biogeochemistry; the US GEOSCIENCES Arctic expedition in summer 2015 provides a unique platform for a comprehensive investigation of atmospheric deposition of TEs to the Arctic Ocean. In this presentation, we will discuss the preliminary results generated from aerosol particles collected during the Arctic cruise. We will examine the variation of atmospheric concentrations of selected TEs as a function of aerosol particle sizes in the Arctic marine atmosphere and discuss the atmospheric deposition fluxes of selected TEs to the Arctic Ocean.
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