Articles

Title:	Suspended particulate matter in the Hel upwelling region (the Baltic Sea)
Authors:	Matciak Maciej Burska Dorota Szymelfenig Maria Bradtke Katarzyna
Abstract:	Qualitative and quantitative measurements of the suspended particulate matter and light attenuation coefficients in seawater were carried out during seven upwelling events along the northern seaside of the Hel Peninsula (the southern Baltic Sea, April 2000 - August 2002). Mass concentrations (total SPM, POC, PON) and particle abundance were in the ranges typical of sea coastal zone, and their maximum values resulted from spring phytoplankton bloom. Statistical classification of the measured parameters showed that there were usually three masses of water characterized by different SPM features. The waters upwelled from medium or deep layer differed from the surrounding surface waters in the amount of suspended matter as well as its quality. The upwelling waters showed two-fold decrease in total SPM concentration (C_p), 3- to 5-fold decrease in particle abundance (N) and 1.5 - to 4-fold decrease in POC and PON concentrations and a significant increase in POC : C_a as compared to the reference area. They also differed from the surrounding waters in respect of POC : PON ratio and particle size distribution. The above differences showed changes in time. Red light attenuation increased with an increase in the mass of suspended particles. However, the increase was considerably smaller in cold, deep or upwelled waters as a result of a lower proportion of living phytoplankton cells (high POC : C_a ratio).
DOI:
Type of paper:	Original research paper
Pages:	53 to 73
Cytation:	Bradtke K., Burska D., Matciak M., Szymelfenig M., 2005, Suspended particulate matter in the Hel upwelling region (the Baltic Sea), Ocean. Hydrob. Studies, 34(Supl. 2): 53-73
Keywords:	coastal upwelling, Baltic Sea, Hel Peninsula, suspended particulate metter, light attenuation
Year:	2005
Category:
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