Atmospheric particles, including mineral dust, deposit on sea-ice throughout the year, altering its reflectance and therefore the timing of summer melt. When melt occurs, dust entrained within the ice is released into the ocean and upon dissolution can provide life-limiting nutrients for ocean phytoplankton that remove carbon dioxide from the atmosphere. This complicated interplay between sea-ice processes, radiation, climate, and biogeochemistry is poorly understood. We will conduct field measurements in coastal northern Alaska on annual sea ice to determine the distribution and isotopic composition of dust and nutrients in sea-ice and surrounding water through a seasonal cycle. Using these measurements, we will inform model representations of cryospheric, aerosol, and biogeochemical processes in the Community Earth System Model, a state-of-the-art coupled climate system model, to improve simulations of future climate and test hypotheses about linkages between anthropogenic activity (e.g., dust mobilization), phytoplankton blooms, and climate change.