Aerosol Optical Depth Characterization in Middle and Polar Latitudes

The Aerosol Optical Depth (AOD) is a very important atmospheric parameter which knowledge will help to understand the atmospheric processes and to propose different scenarios related with climate change. AOD plays a main role in the energy radiation balance in the atmosphere and in the aerosol radiative forcing. In this paper an analysis of time series of AOD, from MYD04_3K (MODIS Aqua Aerosols product gridded in a resolution of 3 kilometres), is analysed by means of Fourier Harmonics tool. Results shown in this paper are preliminary results because a more comprehensive study is envisaged where data coming from sun and lunar photometers installed in Artic stations will be analysed jointly.