Early Holocene Temperature Oscillations Exceed Amplitude of Observed and Projected Warming in Svalbard Lakes
Arctic climate is uniquely sensitive to ongoing warming. The feedbacks that drive this amplified response remain insufficiently quantified and misrepresented in model scenarios of future warming. Comparison with paleotemperature reconstructions from past warm intervals can help close this gap. The E...
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Online Access: | https://hdl.handle.net/11250/2728059 https://doi.org/10.1029/2019GL084384 |
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ftunivbergen:oai:bora.uib.no:11250/2728059 2023-05-15T14:49:38+02:00 Early Holocene Temperature Oscillations Exceed Amplitude of Observed and Projected Warming in Svalbard Lakes Bilt, Willem van der D'Andrea, William J. Werner, Johannes Bakke, Jostein 2019 application/pdf https://hdl.handle.net/11250/2728059 https://doi.org/10.1029/2019GL084384 eng eng AGU urn:issn:0094-8276 https://hdl.handle.net/11250/2728059 https://doi.org/10.1029/2019GL084384 cristin:1797983 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2019. The Authors. Geophysical Research Letters 46 24 14732-14741 Journal article Peer reviewed 2019 ftunivbergen https://doi.org/10.1029/2019GL084384 2023-03-14T17:41:11Z Arctic climate is uniquely sensitive to ongoing warming. The feedbacks that drive this amplified response remain insufficiently quantified and misrepresented in model scenarios of future warming. Comparison with paleotemperature reconstructions from past warm intervals can help close this gap. The Early Holocene (11.7–8.2 ka BP) is an important target because Arctic temperatures were warmer than today. This study presents centennially resolved summer temperature reconstructions from three Svalbard lakes. We show that Early Holocene temperatures fluctuated between the coldest and warmest extremes of the past 12 ka, exceeding the range of instrumental observations and future projections. Peak warmth occurred ~10 ka BP, with temperatures 7 °C warmer than today due to high radiative forcing and intensified inflow of warm Atlantic waters. Between 9.5 and 8 ka BP, temperatures dropped in response to freshwater fluxes from melting ice. Facing similar mechanisms, our findings may provide insight into the near‐future response of Arctic climate. publishedVersion Article in Journal/Newspaper Arctic Svalbard University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Svalbard Geophysical Research Letters 46 24 14732 14741 |
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Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Arctic climate is uniquely sensitive to ongoing warming. The feedbacks that drive this amplified response remain insufficiently quantified and misrepresented in model scenarios of future warming. Comparison with paleotemperature reconstructions from past warm intervals can help close this gap. The Early Holocene (11.7–8.2 ka BP) is an important target because Arctic temperatures were warmer than today. This study presents centennially resolved summer temperature reconstructions from three Svalbard lakes. We show that Early Holocene temperatures fluctuated between the coldest and warmest extremes of the past 12 ka, exceeding the range of instrumental observations and future projections. Peak warmth occurred ~10 ka BP, with temperatures 7 °C warmer than today due to high radiative forcing and intensified inflow of warm Atlantic waters. Between 9.5 and 8 ka BP, temperatures dropped in response to freshwater fluxes from melting ice. Facing similar mechanisms, our findings may provide insight into the near‐future response of Arctic climate. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Bilt, Willem van der D'Andrea, William J. Werner, Johannes Bakke, Jostein |
spellingShingle |
Bilt, Willem van der D'Andrea, William J. Werner, Johannes Bakke, Jostein Early Holocene Temperature Oscillations Exceed Amplitude of Observed and Projected Warming in Svalbard Lakes |
author_facet |
Bilt, Willem van der D'Andrea, William J. Werner, Johannes Bakke, Jostein |
author_sort |
Bilt, Willem van der |
title |
Early Holocene Temperature Oscillations Exceed Amplitude of Observed and Projected Warming in Svalbard Lakes |
title_short |
Early Holocene Temperature Oscillations Exceed Amplitude of Observed and Projected Warming in Svalbard Lakes |
title_full |
Early Holocene Temperature Oscillations Exceed Amplitude of Observed and Projected Warming in Svalbard Lakes |
title_fullStr |
Early Holocene Temperature Oscillations Exceed Amplitude of Observed and Projected Warming in Svalbard Lakes |
title_full_unstemmed |
Early Holocene Temperature Oscillations Exceed Amplitude of Observed and Projected Warming in Svalbard Lakes |
title_sort |
early holocene temperature oscillations exceed amplitude of observed and projected warming in svalbard lakes |
publisher |
AGU |
publishDate |
2019 |
url |
https://hdl.handle.net/11250/2728059 https://doi.org/10.1029/2019GL084384 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Svalbard |
genre_facet |
Arctic Svalbard |
op_source |
Geophysical Research Letters 46 24 14732-14741 |
op_relation |
urn:issn:0094-8276 https://hdl.handle.net/11250/2728059 https://doi.org/10.1029/2019GL084384 cristin:1797983 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2019. The Authors. |
op_doi |
https://doi.org/10.1029/2019GL084384 |
container_title |
Geophysical Research Letters |
container_volume |
46 |
container_issue |
24 |
container_start_page |
14732 |
op_container_end_page |
14741 |
_version_ |
1766320710580436992 |