Research of the Relationship between Salinity and Yellow Substance Fluorescence in the Kara Sea

Glukhovets D. I., Goldin Yu. A.

The results of studies of the dissolved organic matter fluorescence intensity and salinity correlation in the surface layer of the Kara Sea are shown. The studies were carried out using a flow-through system during the cruises of the “Professor Shtokman” and “Akademik Mstislav Keldysh” research vessels (2013—2015). To study the spatial variability of the correlation of colored dissolved organic matter fluorescence and salinity, the method of “sliding correlations” proposed by the authors is used. A strong anticorrelation was recorded in the area of waters affected by river runoff. A positive correlation was recorded in the region of the prevailing effect of the melted glacial waters. In the areas of comparable influence of these factors, as well as outside the desalination zone, no correlation is observed. The interannual variability of the investigated correlation is recorded. The boundaries of the area affected by river runoff are determined from the satellite ocean color data of the MODIS instrument, processed using a regional algorithm for the Kara Sea. Strong anticorrelation in this region, observed over a wide range of salinity, allows the use of satellite maps of the yellow substance absorption spatial distribution to determine the boundaries position of the surface desalinated layer, to study its structure and dynamics.

Download original text