Abstract
Abstract. The distribution of suspended particulate matter (SPM) concentration in the Kara Sea was analysed based on ship and satellite data during the lowest ice cover periods in the Arctic (2007 and 2011). The distance of the river runoff with terrigenous SPM was recognized up to at least 76–76.5° N on the basis of isotope data and SPM concentrations and composition. The complex studies of SPM in the water column and in the benthic boundary layer provided new information about the supply and transformation of particles in the marine ecosystem.
Highlights
The main features of suspended particulate matter (SPM) in marine waters are formed as a result of the mineral particles inflow and vital activity of marine organisms
Special attention is given to the study of cross-shelf transport of terrigenous SPM arriving with runoff from the Ob’ and Yenisei rivers, since these rivers account for about 90% of the annual freshwater flow into the sea
It is easy to see that frontal zones occur at the marine boundary of the Ob’ and Yenisei estuaries, where SPM concentration falls sharply, by an order of magnitude and more
Summary
The main features of suspended particulate matter (SPM) in marine waters are formed as a result of the mineral particles inflow and vital activity of marine organisms. The aim of this work is to study the regularities of the distribution and genetic composition of the SPM in the Kara Sea during the lowest ice cover in the Arctic using both satellite and field observations, as well as microbiological and isotope methods. The research was carried out during the 57th and 59th cruises of RV Akademik Mstislav Keldysh in September–October 2007 and 2011, respectively. Climatic conditions over this part of the Arctic during those years were relatively similar (Flint 2010, Platonov et al 2012). The largest reduction of the Arctic ice cover was in September 2007, compared with continuous observations from the end of the 1970s (Platonov et al 2012)
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