Holocene precipitation seasonality in northern Svalbard: Influence of sea ice and regional ocean surface conditions
Publisher's version (útgefin grein) Arctic precipitation is predicted to increase in the coming century, due to a combination of enhanced northward atmospheric moisture transport and local surface evaporation from ice-free seas. However, large model uncertainties, limited long-term observations...
Published in: | Quaternary Science Reviews |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2020
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Online Access: | https://hdl.handle.net/20.500.11815/2290 https://doi.org/10.1016/j.quascirev.2020.106388 |
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ftopinvisindi:oai:opinvisindi.is:20.500.11815/2290 2023-05-15T14:56:36+02:00 Holocene precipitation seasonality in northern Svalbard: Influence of sea ice and regional ocean surface conditions Kjellman, Sofia E. Schomacker, Anders Thomas, Elizabeth K. Håkansson, Lena Duboscq, Sandrine Cluett, Allison A. Farnsworth, Wesley Allaart, Lis Cowling, Owen C. McKay, Nicholas P. Brynjólfsson, Skafti Ingolfsson, Olafur Jarðvísindastofnun (HÍ) Institute of Earth Sciences (UI) Jarðvísindadeild (HÍ) Faculty of Earth Sciences (UI) Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) Háskóli Íslands University of Iceland 2020-07-15 106388 https://hdl.handle.net/20.500.11815/2290 https://doi.org/10.1016/j.quascirev.2020.106388 en eng Elsevier BV Quaternary Science Reviews;240 https://www.sciencedirect.com/science/article/pii/S0277379120303504?via%3Dihub Kjellman, S.E., Schomacker, A., Thomas, E.K., Håkansson, L., Duboscq, S., Cluett, A.A., Farnsworth, W.R., Allaart, L., Cowling, O.C., Mckay, N.P., Brynjólfsson, S., Ingólfsson, Ó., 2020. Holocene precipitation seasonality in northern Svalbard: Influence of sea ice and regional ocean surface conditions. Quaternary Science Reviews. doi:10.1016/j.quascirev.2020.106388 0277-3791 https://hdl.handle.net/20.500.11815/2290 Quaternary Science Reviews doi:10.1016/j.quascirev.2020.106388 info:eu-repo/semantics/openAccess Arctic Biomarkers Hydrogen isotopes Lake sediment n-alkanoic acids Paleoclimatology Precipitation seasonality Quaternary Sea ice Norður-heimskautið Fornveðurfræði Kvartertímabilið info:eu-repo/semantics/article 2020 ftopinvisindi https://doi.org/20.500.11815/2290 https://doi.org/10.1016/j.quascirev.2020.106388 2022-11-18T06:52:04Z Publisher's version (útgefin grein) Arctic precipitation is predicted to increase in the coming century, due to a combination of enhanced northward atmospheric moisture transport and local surface evaporation from ice-free seas. However, large model uncertainties, limited long-term observations, and high spatiotemporal variability limit our understanding of these mechanisms, emphasizing the need for paleoclimate records of precipitation changes. Here we use lipid biomarkers in lake sediments to reconstruct precipitation seasonality in northern Spitsbergen, Svalbard. We measured the hydrogen isotopic ratios (δ2H) of n-alkanoic acids (C20–C30) from sedimentary leaf waxes in lake Austre Nevlingen, Spitsbergen. We interpret δ2H values of mid-chain (C22) and long-chain (C28) n-alkanoic acids to represent δ2H of lake and soil water, respectively. Austre Nevlingen lake water δ2H reflects amount-weighted mean annual precipitation δ2H. In contrast, soil water is mostly recharged by summer rainfall, and therefore reflects δ2H values of summer precipitation. Austre Nevlingen leaf wax δ2H values are 2H-depleted in the Early Holocene, suggesting high winter precipitation amounts. This coincides with high summer insolation, strong Atlantic water advection and reduced spring sea-ice cover in surrounding waters. Winter precipitation continued to dominate until c. 6 cal. kyr BP. After 6 cal. kyr BP, the trend in the biomarker record is not as clear. This could be related to colder conditions causing longer duration of seasonal lake-ice cover, thereby influencing the precipitation seasonality registered by the lake water. The Austre Nevlingen record suggests a close relationship between precipitation seasonality and regional ocean surface conditions, consistent with simulations suggesting that Arctic winter sea-ice loss will lead to increased local evaporation. Fieldwork, radiocarbon dates, and laboratory analyses were funded by the Carlsberg Foundation (grant number CF14-0756 to AS), the Nansen Foundation (to AS), and the ... Article in Journal/Newspaper Arctic Sea ice Svalbard Spitsbergen Opin vísindi (Iceland) Arctic Svalbard Quaternary Science Reviews 240 106388 |
institution |
Open Polar |
collection |
Opin vísindi (Iceland) |
op_collection_id |
ftopinvisindi |
language |
English |
topic |
Arctic Biomarkers Hydrogen isotopes Lake sediment n-alkanoic acids Paleoclimatology Precipitation seasonality Quaternary Sea ice Norður-heimskautið Fornveðurfræði Kvartertímabilið |
spellingShingle |
Arctic Biomarkers Hydrogen isotopes Lake sediment n-alkanoic acids Paleoclimatology Precipitation seasonality Quaternary Sea ice Norður-heimskautið Fornveðurfræði Kvartertímabilið Kjellman, Sofia E. Schomacker, Anders Thomas, Elizabeth K. Håkansson, Lena Duboscq, Sandrine Cluett, Allison A. Farnsworth, Wesley Allaart, Lis Cowling, Owen C. McKay, Nicholas P. Brynjólfsson, Skafti Ingolfsson, Olafur Holocene precipitation seasonality in northern Svalbard: Influence of sea ice and regional ocean surface conditions |
topic_facet |
Arctic Biomarkers Hydrogen isotopes Lake sediment n-alkanoic acids Paleoclimatology Precipitation seasonality Quaternary Sea ice Norður-heimskautið Fornveðurfræði Kvartertímabilið |
description |
Publisher's version (útgefin grein) Arctic precipitation is predicted to increase in the coming century, due to a combination of enhanced northward atmospheric moisture transport and local surface evaporation from ice-free seas. However, large model uncertainties, limited long-term observations, and high spatiotemporal variability limit our understanding of these mechanisms, emphasizing the need for paleoclimate records of precipitation changes. Here we use lipid biomarkers in lake sediments to reconstruct precipitation seasonality in northern Spitsbergen, Svalbard. We measured the hydrogen isotopic ratios (δ2H) of n-alkanoic acids (C20–C30) from sedimentary leaf waxes in lake Austre Nevlingen, Spitsbergen. We interpret δ2H values of mid-chain (C22) and long-chain (C28) n-alkanoic acids to represent δ2H of lake and soil water, respectively. Austre Nevlingen lake water δ2H reflects amount-weighted mean annual precipitation δ2H. In contrast, soil water is mostly recharged by summer rainfall, and therefore reflects δ2H values of summer precipitation. Austre Nevlingen leaf wax δ2H values are 2H-depleted in the Early Holocene, suggesting high winter precipitation amounts. This coincides with high summer insolation, strong Atlantic water advection and reduced spring sea-ice cover in surrounding waters. Winter precipitation continued to dominate until c. 6 cal. kyr BP. After 6 cal. kyr BP, the trend in the biomarker record is not as clear. This could be related to colder conditions causing longer duration of seasonal lake-ice cover, thereby influencing the precipitation seasonality registered by the lake water. The Austre Nevlingen record suggests a close relationship between precipitation seasonality and regional ocean surface conditions, consistent with simulations suggesting that Arctic winter sea-ice loss will lead to increased local evaporation. Fieldwork, radiocarbon dates, and laboratory analyses were funded by the Carlsberg Foundation (grant number CF14-0756 to AS), the Nansen Foundation (to AS), and the ... |
author2 |
Jarðvísindastofnun (HÍ) Institute of Earth Sciences (UI) Jarðvísindadeild (HÍ) Faculty of Earth Sciences (UI) Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) Háskóli Íslands University of Iceland |
format |
Article in Journal/Newspaper |
author |
Kjellman, Sofia E. Schomacker, Anders Thomas, Elizabeth K. Håkansson, Lena Duboscq, Sandrine Cluett, Allison A. Farnsworth, Wesley Allaart, Lis Cowling, Owen C. McKay, Nicholas P. Brynjólfsson, Skafti Ingolfsson, Olafur |
author_facet |
Kjellman, Sofia E. Schomacker, Anders Thomas, Elizabeth K. Håkansson, Lena Duboscq, Sandrine Cluett, Allison A. Farnsworth, Wesley Allaart, Lis Cowling, Owen C. McKay, Nicholas P. Brynjólfsson, Skafti Ingolfsson, Olafur |
author_sort |
Kjellman, Sofia E. |
title |
Holocene precipitation seasonality in northern Svalbard: Influence of sea ice and regional ocean surface conditions |
title_short |
Holocene precipitation seasonality in northern Svalbard: Influence of sea ice and regional ocean surface conditions |
title_full |
Holocene precipitation seasonality in northern Svalbard: Influence of sea ice and regional ocean surface conditions |
title_fullStr |
Holocene precipitation seasonality in northern Svalbard: Influence of sea ice and regional ocean surface conditions |
title_full_unstemmed |
Holocene precipitation seasonality in northern Svalbard: Influence of sea ice and regional ocean surface conditions |
title_sort |
holocene precipitation seasonality in northern svalbard: influence of sea ice and regional ocean surface conditions |
publisher |
Elsevier BV |
publishDate |
2020 |
url |
https://hdl.handle.net/20.500.11815/2290 https://doi.org/10.1016/j.quascirev.2020.106388 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Sea ice Svalbard Spitsbergen |
genre_facet |
Arctic Sea ice Svalbard Spitsbergen |
op_relation |
Quaternary Science Reviews;240 https://www.sciencedirect.com/science/article/pii/S0277379120303504?via%3Dihub Kjellman, S.E., Schomacker, A., Thomas, E.K., Håkansson, L., Duboscq, S., Cluett, A.A., Farnsworth, W.R., Allaart, L., Cowling, O.C., Mckay, N.P., Brynjólfsson, S., Ingólfsson, Ó., 2020. Holocene precipitation seasonality in northern Svalbard: Influence of sea ice and regional ocean surface conditions. Quaternary Science Reviews. doi:10.1016/j.quascirev.2020.106388 0277-3791 https://hdl.handle.net/20.500.11815/2290 Quaternary Science Reviews doi:10.1016/j.quascirev.2020.106388 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.11815/2290 https://doi.org/10.1016/j.quascirev.2020.106388 |
container_title |
Quaternary Science Reviews |
container_volume |
240 |
container_start_page |
106388 |
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1766328682275667968 |