Change of tropospheric aerosol over the ocean in the Arctic observed from space

Aerosols play a critical role in climate change over the polar regions. The impacts of aerosol on Arctic Amplification is not well understood. In this talk, satellite observations from different instruments are used to understand the spatial and temporal changes of aerosol properties in the troposphere over the ocean in the Arctic in the past four decades. The model simulations are also used to identify the change of aerosol components. The change of Arctic haze due to anthropogenic source is well identified from both satellite observations and model simulations. However, the change of marine aerosol source in the Arctic, especially for the period with strong sea ice melting, is only being observed from satellite observations.