Aleksandr M Fedorov, Nansen International Environmental and Remost Sensing St Petersburg, Saint Petersburg, Russia; St. Petersburg State University (SPbSU), Institute of Earth Science, Oceanology, Saint-Petersburg, Russia, Igor Bashmachnikov, St. Petersburg State University (SPbSU), Institute of Earth Science, St. Petersburg, Russia; Nansen International Environmental and Remote Sensing Center, St. Petersburg, Russia and Tatyana V Belonenko, Saint Petersburg State University, Oceanology, Saint Petersburg, Russia