Regional-scale phytoplankton dynamics and their association with glacier meltwater runoff in Svalbard
Abstract km distance from the shore. These seven regions consist predominantly of the major fjord systems of Svalbard. The adjacent land areas are characterized by a wide range of total glacier coverage (35.5 % to 81.2 %) and fraction of marine-terminating glacier area (40.2 % to 87.4 %). We find that an increase in specific glacier-runoff rate of 10 mm water equivalent per 8 d period raises summertime chlorophyll a % to 20.0 %, depending on the region. During the annual peak discharge we estimate that glacier runoff increases chlorophyll a % to 50.2 % compared to situations with no runoff. This suggests that glacier runoff is an important factor sustaining summertime phytoplankton production in Svalbard fjords, in line with findings from several fjords in Greenland. In contrast, for regions bordering open coasts, and beyond 10 km distance from the shore, we do not find significant associations of chlorophyll a with runoff. In these regions, physical ocean and sea-ice variables control chlorophyll a, pointing at the importance of a late sea-ice breakup in northern Svalbard, as well as the advection of Atlantic water masses along the West Spitsbergen Current for summertime phytoplankton dynamics. Our method allows for the investigation and monitoring of glacier-runoff effects on primary production throughout the summer season and is applicable on a pan-Arctic scale, thus complementing valuable but scarce in situ measurements in both space and time.
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Erschienen in
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Regional-scale phytoplankton dynamics and their association with glacier meltwater runoff in Svalbard ; volume:19 ; number:2 ; year:2022 ; pages:271-294 ; extent:24
Biogeosciences ; 19, Heft 2 (2022), 271-294 (gesamt 24)
- Urheber
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Dunse, Thorben
Dong, Kaixing
Aas, Kjetil Schanke
Stige, Leif Christian
- DOI
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10.5194/bg-19-271-2022
- URN
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urn:nbn:de:101:1-2022012004182056087087
- Rechteinformation
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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15.08.2025, 07:25 MESZ
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Beteiligte
- Dunse, Thorben
- Dong, Kaixing
- Aas, Kjetil Schanke
- Stige, Leif Christian
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