Articles | Volume 15, issue 4
https://doi.org/10.5194/tc-15-2083-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-15-2083-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
27 Apr 2021
Research article |
| 27 Apr 2021
| 27 Apr 2021
Early spring subglacial discharge plumes fuel under-ice primary production at a Svalbard tidewater glacier
Tobias Reiner Vonnahme
CORRESPONDING AUTHOR
Department of Arctic and Marine Biology, UiT The Arctic University
of Norway, Tromsø, Norway
Emma Persson
Department of Arctic and Marine Biology, UiT The Arctic University
of Norway, Tromsø, Norway
Ulrike Dietrich
Department of Arctic and Marine Biology, UiT The Arctic University
of Norway, Tromsø, Norway
Eva Hejdukova
Department of Ecology, Faculty of Science, Charles University,
Prague, Czech Republic
Christine Dybwad
Department of Arctic and Marine Biology, UiT The Arctic University
of Norway, Tromsø, Norway
Josef Elster
Centre for Polar Ecology, University of South Bohemia, České Budějovice, Czech Republic
Institute of Botany ASCR, Třeboň, Czech Republic
Melissa Chierici
Institute of Marine Research, Tromsø, Norway
University Centre in Svalbard (UNIS), Longyearbyen, Svalbard
Rolf Gradinger
Department of Arctic and Marine Biology, UiT The Arctic University
of Norway, Tromsø, Norway
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Short summary
We describe the impact of subglacial discharge in early spring on a sea-ice-covered fjord on Svalbard by comparing a site influenced by a shallow tidewater glacier with two reference sites. We found a moderate under-ice phytoplankton bloom at the glacier front, which we attribute to subglacial upwelling of nutrients; a strongly stratified surface layer; and higher light penetration. In contrast, sea ice algae biomass was limited by low salinities and brine volumes.
We describe the impact of subglacial discharge in early spring on a sea-ice-covered fjord on...
