Freshwater input to the Arctic fjord Hornsund (Svalbard)
| Autor: | Jacek Jania, Mariusz Grabiec, Katarzyna Cielecka-Nowak, Małgorzata Błaszczyk, Mateusz Moskalik, Waldemar Walczowski, Dariusz Ignatiuk, Aleksander Uszczyk |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Fjord precipitation Oceanography 01 natural sciences lcsh:Oceanography Earth and Planetary Sciences (miscellaneous) Environmental Chemistry lcsh:GC1-1581 14. Life underwater Precipitation Meltwater lcsh:Environmental sciences 0105 earth and related environmental sciences General Environmental Science Tidewater lcsh:GE1-350 frontal ablation geography geography.geographical_feature_category snow cover on land 010604 marine biology & hydrobiology Sediment Glacier Snow glacier meltwater runoff 13. Climate action Environmental science Svalbard fjords Physical geography Bay |
| Zdroj: | Polar Research, Vol 38, Iss 0, Pp 1-18 (2019) |
| ISSN: | 1751-8369 0800-0395 |
| DOI: | 10.33265/polar.v38.3506 |
| Popis: | Glaciers draining to the Hornsund basin (southern Spitsbergen, Svalbard) have experienced a significant retreat and mass volume loss over the last decades, increasing the input of freshwater into the fjord. An increase in freshwater input can influence fjord hydrology, hydrodynamics, sediment flux and biota, especially in a changing climate. Here, we describe the sources of freshwater supply to the fjord based on glaciological and meteorological data from the period 2006 to 2015. The average freshwater input from land to the Hornsund bay is calculated as 2517 ± 82 Mt a−1, with main contributions from glacier meltwater runoff (986 Mt a−1; 39%) and frontal ablation of tidewater glaciers (634 Mt a−1; 25%). Tidewater glaciers in Hornsund lose ca. 40% of their mass by frontal ablation. The terminus retreat component accounts for ca. 30% of the mass loss by frontal ablation, but it can vary between 17% and 44% depending on oceanological, meteorological and geomorphological factors. The contribution of the total precipitation over land excluding winter snowfall (520 Mt a−1), total precipitation over the fjord area (180 Mt a−1) and melting of the snow cover over unglaciated areas (197 Mt a−1) to the total freshwater input appear to be small: 21%, 7% and 8%, respectively. |
| Databáze: | OpenAIRE |
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