Late twentieth century increase in northern Spitsbergen (Svalbard) glacier-derived runoff tracked by coralline algal Ba/Ca ratios
The Arctic cryosphere is changing rapidly due to global warming. Northern Svalbard is a warming hotspot with a temperature rise of ~ 6 °C over the last three decades. Concurrently, modelled data suggest a marked increase in glacier runoff during recent decades in northern Svalbard, and runoff is pro...
Published in: | Climate Dynamics |
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Language: | English |
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ftunivgeneve:oai:unige.ch:unige:163909 2023-05-15T14:30:58+02:00 Late twentieth century increase in northern Spitsbergen (Svalbard) glacier-derived runoff tracked by coralline algal Ba/Ca ratios Hetzinger, Steffen Halfar, Jochen Zajacz, Zoltan Möller, Marco Wisshak, Max 2021 https://archive-ouverte.unige.ch/unige:163909 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-021-05642-x unige:163909 https://archive-ouverte.unige.ch/unige:163909 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ CC-BY ISSN: 0930-7575 Climate dynamics, Vol. 56, No 9-10 (2021) pp. 3295-3303 info:eu-repo/classification/ddc/550 Text Article scientifique info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftunivgeneve https://doi.org/10.1007/s00382-021-05642-x 2022-10-09T23:38:43Z The Arctic cryosphere is changing rapidly due to global warming. Northern Svalbard is a warming hotspot with a temperature rise of ~ 6 °C over the last three decades. Concurrently, modelled data suggest a marked increase in glacier runoff during recent decades in northern Svalbard, and runoff is projected to increase. However, observational data from before anthropogenic influence are sparse and the potential effects on the surface ocean are unclear. Here, we present a 200-year record of Ba/Ca ratios measured in annual increment-forming coralline algae from northern Spitsbergen as a proxy for past glacier-derived meltwater input. Our record shows a significant increasing trend in algal Ba/Ca ratios from the late-1980s onwards matching modelled regional runoff data, suggesting a drastic increase in land-based runoff. The rate of increase is unprecedented during the last two centuries and captures the impact of amplified warming on the coastal surface ocean in the high Arctic. The algal Ba/Ca runoff proxy offers an opportunity to reconstruct past land-based runoff variability in Arctic settings in high resolution, providing important data for validating and improving climate modelling studies. Article in Journal/Newspaper arctic cryosphere Arctic glacier Global warming Svalbard Spitsbergen Université de Genève: Archive ouverte UNIGE Arctic Svalbard Climate Dynamics 56 9-10 3295 3303 |
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Open Polar |
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Université de Genève: Archive ouverte UNIGE |
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ftunivgeneve |
language |
English |
topic |
info:eu-repo/classification/ddc/550 |
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info:eu-repo/classification/ddc/550 Hetzinger, Steffen Halfar, Jochen Zajacz, Zoltan Möller, Marco Wisshak, Max Late twentieth century increase in northern Spitsbergen (Svalbard) glacier-derived runoff tracked by coralline algal Ba/Ca ratios |
topic_facet |
info:eu-repo/classification/ddc/550 |
description |
The Arctic cryosphere is changing rapidly due to global warming. Northern Svalbard is a warming hotspot with a temperature rise of ~ 6 °C over the last three decades. Concurrently, modelled data suggest a marked increase in glacier runoff during recent decades in northern Svalbard, and runoff is projected to increase. However, observational data from before anthropogenic influence are sparse and the potential effects on the surface ocean are unclear. Here, we present a 200-year record of Ba/Ca ratios measured in annual increment-forming coralline algae from northern Spitsbergen as a proxy for past glacier-derived meltwater input. Our record shows a significant increasing trend in algal Ba/Ca ratios from the late-1980s onwards matching modelled regional runoff data, suggesting a drastic increase in land-based runoff. The rate of increase is unprecedented during the last two centuries and captures the impact of amplified warming on the coastal surface ocean in the high Arctic. The algal Ba/Ca runoff proxy offers an opportunity to reconstruct past land-based runoff variability in Arctic settings in high resolution, providing important data for validating and improving climate modelling studies. |
format |
Article in Journal/Newspaper |
author |
Hetzinger, Steffen Halfar, Jochen Zajacz, Zoltan Möller, Marco Wisshak, Max |
author_facet |
Hetzinger, Steffen Halfar, Jochen Zajacz, Zoltan Möller, Marco Wisshak, Max |
author_sort |
Hetzinger, Steffen |
title |
Late twentieth century increase in northern Spitsbergen (Svalbard) glacier-derived runoff tracked by coralline algal Ba/Ca ratios |
title_short |
Late twentieth century increase in northern Spitsbergen (Svalbard) glacier-derived runoff tracked by coralline algal Ba/Ca ratios |
title_full |
Late twentieth century increase in northern Spitsbergen (Svalbard) glacier-derived runoff tracked by coralline algal Ba/Ca ratios |
title_fullStr |
Late twentieth century increase in northern Spitsbergen (Svalbard) glacier-derived runoff tracked by coralline algal Ba/Ca ratios |
title_full_unstemmed |
Late twentieth century increase in northern Spitsbergen (Svalbard) glacier-derived runoff tracked by coralline algal Ba/Ca ratios |
title_sort |
late twentieth century increase in northern spitsbergen (svalbard) glacier-derived runoff tracked by coralline algal ba/ca ratios |
publishDate |
2021 |
url |
https://archive-ouverte.unige.ch/unige:163909 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
arctic cryosphere Arctic glacier Global warming Svalbard Spitsbergen |
genre_facet |
arctic cryosphere Arctic glacier Global warming Svalbard Spitsbergen |
op_source |
ISSN: 0930-7575 Climate dynamics, Vol. 56, No 9-10 (2021) pp. 3295-3303 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-021-05642-x unige:163909 https://archive-ouverte.unige.ch/unige:163909 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00382-021-05642-x |
container_title |
Climate Dynamics |
container_volume |
56 |
container_issue |
9-10 |
container_start_page |
3295 |
op_container_end_page |
3303 |
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1766304719957917696 |