Spatiotemporal changes in the concentration and composition of suspended particulate matter in front of Hansbreen, a tidewater glacier in Svalbard

• Autorzy: Moskalik M. , Ćwiąkała J. , Szczuciński W. , Dominiczak A. , Głowacki O. , Wojtysiak K. , Zagórski P.

Identyfikatory

DOI

10.1016/j.oceano.2018.03.001

• Języki publikacji: EN

Abstrakty

EN

Tidewater glaciers supply large amounts of suspended particulate matter (SPM) and freshwater to fjords and affect oceanographic, sedimentological and biological processes. Our understanding of these processes, is usually limited to the short summer season. Here, we present the results of a one-year-long monitoring of the spatial variability in SPM characteristics in a context of oceanographic and meteorological conditions of a glacial bay next to Hansbreen, a tidewater glacier in Hornsund (southern Spitsbergen). The observed range of SPM concentrations was similar to ranges measured in other sub-polar glaciated fjords, especially in Svalbard. The major source of SPM is the meltwater discharge from the glacier. The maximum water column-averaged SPM concentrations did not correlate with peaks in freshwater discharge and were observed at the beginning of the autumn season, when the fjord water transitioned from stratified to fully mixed. The observed spatiotemporal variations in the total SPM, particulate organic matter (POM) and particulate inorganic matter (PIM) are likely controlled by a combination of factors including freshwater supply, water stratification and circulation, bathymetry, the presence of sea ice, biological productivity and sediment resuspension. During the ablation season, the SPM maximum concentrations were located within the upper water layer, whereas during the winter and spring, the greatest amounts of SPM were concentrated in deeper part. Thus, typical remote sensing-based studies that focus on SPM distributions may not reflect the real SPM levels. POM and PIM concentrations were correlated with each other, during most of the time suggesting that they may have a common source.

Słowa kluczowe

EN

seasonality; suspended particulate matter; particulate organic matter; tidewater glacier; fjord; Svalbard

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2018
• Tom: No. 60 (4)
• Strony: 446--463
• Opis fizyczny: Bibliogr. 85 poz., mapy, tab., wykr.

Twórcy

autor

Moskalik M.

• Institute of Geophysics, Polish Academy of Sciences, Warszawa, Poland

autor

Ćwiąkała J.

• Institute of Geophysics, Polish Academy of Sciences, Warszawa, Poland

autor

Szczuciński W.

• Institute of Geology, Adam Mickiewicz University in Poznań, Poznań, Poland

autor

Dominiczak A.

• Institute of Geology, Adam Mickiewicz University in Poznań, Poznań, Poland

autor

Głowacki O.

• Institute of Geophysics, Polish Academy of Sciences, Warszawa, Poland

autor

Wojtysiak K.

• Institute of Geophysics, Polish Academy of Sciences, Warszawa, Poland

autor

Zagórski P.

• Faculty of Earth Sciences and Spatial Management, Maria Curie-Skłodowska University, Lublin, Poland

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).