Investigations of the hydrobiological situation in Lake Onega using joint spaceborne radar,airborne and in situ measurements |
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| Authors: | M. A. NAUMENKO D. V. BELETSKY v. B. RUMYANTSEV V. S. ETKIN K. TS. LITOVCHENKO A. V. SMIRNOV |
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| Affiliation: | 1. Institute for Lake Research, Russian Academy of Sciences, Sevastjanova, 9, St Petersburg , 196199, Russia;2. Space Research Institute, Russian Academy of Sciences, Profsojusnaja, 84/32, Moscow , 117810, Russia |
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| Abstract: | The results of the first comprehensive limnological experiment conducted in Lake Onega in the summer of 1989 are presented. The concurrent spacebornc observations (Cosmos-l870 SAR), airborne surveys (visual observations and IR radiometry), and shipborne observations (visual observations, thermal and optical water characteristics), made it possible to establish the presence of vast regionsof phytoplankton in the lake. It is shown that the activity of phytoplankton may change water surface conditions, thus causing strong radar signal contrasts. |
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