My research focuses in the field of Boundary Layer (BL) Meteorology and surface-BL dynamic/radiative feedbacks including gases, aerosols and low level tropospheric clouds. Current research projects include studies of micrometeorological influences of small scale processes (e.g., drainage flows) on the Arctic Stable-BL, dynamic exchanges (e.g., downward mixing) on the Arctic Summer-BL during Boreal forest fires, evapotranspiration in Arctic wet-lands (e.g. Tundra and Taiga), long-range aerosol transport to the Arctic (e.g., ARCTAS-2008), aerosol-cloud interaction in the Marine BL (e.g., VOCALS-RExc) and aerosol spectroscopy by Laser Raman spectroscopy, IR-microscopy and SEM techniques. An important component of my research is devoted to field experiments in collaboration with Arctic researchers and abroad and in developing new laser remote sensing instruments (e.g., Full Stokes Polarimetric Lidar) and aerosol spectroscopy (e.g., Polarization Sensitive Raman Spectroscopy).