Synchronized proxy-based temperature reconstructions reveal mid- to late Holocene climate oscillations in High Arctic Svalbard
Existing paleoclimate data are exceedingly sparse from southern Spitsbergen, a High Arctic region predicted to experience significant environmental changes because of amplified warming. We analyzed biotic and isotopic paleolimnological proxies to reconstruct past climate from a lacustrine sediment c...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/323609 2024-04-21T07:54:26+00:00 Synchronized proxy-based temperature reconstructions reveal mid- to late Holocene climate oscillations in High Arctic Svalbard Luoto, Tomi P. Ojala, Antti E. K. Arppe, Laura Brooks, Stephen J. Kurki, Eija Oksman, Mimmi Wooller, Matthew J. Zajaczkowski, Marek Faculty of Biological and Environmental Sciences Finnish Museum of Natural History Department of Geosciences and Geography Stable Isotope Systematics 2020-12-22T13:26:01Z 7 application/pdf http://hdl.handle.net/10138/323609 eng eng Wiley 10.1002/jqs.3001 This work was supported by the Academy of Finland [QUAL-project (A. E. K. Ojala), grant no. 259343] and the Emil Aaltonen Foundation (T. P. Luoto, grant numbers 160156, 170161). We are grateful to Willem van der Bilt for providing data for Fig. 1 and for the Polish Polar Station in Hornsund for logistical support during the research. Constructive comments from two anonymous journal reviewers helped to improve the manuscript. Luoto , T P , Ojala , A E K , Arppe , L , Brooks , S J , Kurki , E , Oksman , M , Wooller , M J & Zajaczkowski , M 2018 , ' Synchronized proxy-based temperature reconstructions reveal mid- to late Holocene climate oscillations in High Arctic Svalbard ' , Journal of Quaternary Science , vol. 33 , no. 1 , pp. 93-99 . https://doi.org/10.1002/jqs.3001 ORCID: /0000-0001-6925-3688/work/41624905 ORCID: /0000-0003-4445-6096/work/90051670 http://hdl.handle.net/10138/323609 03156639-f040-44f8-b8a6-5290c3c8c073 85033219789 000423222600005 info:eu-repo/semantics/openAccess openAccess 1171 Geosciences Article acceptedVersion 2020 ftunivhelsihelda 2024-03-27T17:51:23Z Existing paleoclimate data are exceedingly sparse from southern Spitsbergen, a High Arctic region predicted to experience significant environmental changes because of amplified warming. We analyzed biotic and isotopic paleolimnological proxies to reconstruct past climate from a lacustrine sediment core, with a basal age of similar to 5500aBP, in southern Spitsbergen (77 degrees N). We used fossil Chironomidae assemblages to quantitatively reconstruct past mean July air temperatures and stable oxygen isotope values (delta O-18) of these fossils to estimate changes in mean annual air temperature. These proxy records are strikingly similar and show that the coldest anomaly since the mid-Holocene occurred between 350 and 50calaBP, during the 'Little Ice Age', whereas the warmest period in the summer temperature record occurred between 5500-5000 and similar to 2000calaBP. Our findings indicate that the natural long-term air temperature dynamics in our study area are most likely connected to solar minima and positive feedback mechanisms from sea-surface temperature maxima. The results also highlight that the recent temperature increase is unprecedented in its rate with a similar to 2 degrees C increase in the summer temperatures during the past similar to 50 years. (C) 2017 John Wiley & Sons, Ltd. Peer reviewed Article in Journal/Newspaper Arctic Svalbard Spitsbergen HELDA – University of Helsinki Open Repository Journal of Quaternary Science 33 1 93 99 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
1171 Geosciences |
spellingShingle |
1171 Geosciences Luoto, Tomi P. Ojala, Antti E. K. Arppe, Laura Brooks, Stephen J. Kurki, Eija Oksman, Mimmi Wooller, Matthew J. Zajaczkowski, Marek Synchronized proxy-based temperature reconstructions reveal mid- to late Holocene climate oscillations in High Arctic Svalbard |
topic_facet |
1171 Geosciences |
description |
Existing paleoclimate data are exceedingly sparse from southern Spitsbergen, a High Arctic region predicted to experience significant environmental changes because of amplified warming. We analyzed biotic and isotopic paleolimnological proxies to reconstruct past climate from a lacustrine sediment core, with a basal age of similar to 5500aBP, in southern Spitsbergen (77 degrees N). We used fossil Chironomidae assemblages to quantitatively reconstruct past mean July air temperatures and stable oxygen isotope values (delta O-18) of these fossils to estimate changes in mean annual air temperature. These proxy records are strikingly similar and show that the coldest anomaly since the mid-Holocene occurred between 350 and 50calaBP, during the 'Little Ice Age', whereas the warmest period in the summer temperature record occurred between 5500-5000 and similar to 2000calaBP. Our findings indicate that the natural long-term air temperature dynamics in our study area are most likely connected to solar minima and positive feedback mechanisms from sea-surface temperature maxima. The results also highlight that the recent temperature increase is unprecedented in its rate with a similar to 2 degrees C increase in the summer temperatures during the past similar to 50 years. (C) 2017 John Wiley & Sons, Ltd. Peer reviewed |
author2 |
Faculty of Biological and Environmental Sciences Finnish Museum of Natural History Department of Geosciences and Geography Stable Isotope Systematics |
format |
Article in Journal/Newspaper |
author |
Luoto, Tomi P. Ojala, Antti E. K. Arppe, Laura Brooks, Stephen J. Kurki, Eija Oksman, Mimmi Wooller, Matthew J. Zajaczkowski, Marek |
author_facet |
Luoto, Tomi P. Ojala, Antti E. K. Arppe, Laura Brooks, Stephen J. Kurki, Eija Oksman, Mimmi Wooller, Matthew J. Zajaczkowski, Marek |
author_sort |
Luoto, Tomi P. |
title |
Synchronized proxy-based temperature reconstructions reveal mid- to late Holocene climate oscillations in High Arctic Svalbard |
title_short |
Synchronized proxy-based temperature reconstructions reveal mid- to late Holocene climate oscillations in High Arctic Svalbard |
title_full |
Synchronized proxy-based temperature reconstructions reveal mid- to late Holocene climate oscillations in High Arctic Svalbard |
title_fullStr |
Synchronized proxy-based temperature reconstructions reveal mid- to late Holocene climate oscillations in High Arctic Svalbard |
title_full_unstemmed |
Synchronized proxy-based temperature reconstructions reveal mid- to late Holocene climate oscillations in High Arctic Svalbard |
title_sort |
synchronized proxy-based temperature reconstructions reveal mid- to late holocene climate oscillations in high arctic svalbard |
publisher |
Wiley |
publishDate |
2020 |
url |
http://hdl.handle.net/10138/323609 |
genre |
Arctic Svalbard Spitsbergen |
genre_facet |
Arctic Svalbard Spitsbergen |
op_relation |
10.1002/jqs.3001 This work was supported by the Academy of Finland [QUAL-project (A. E. K. Ojala), grant no. 259343] and the Emil Aaltonen Foundation (T. P. Luoto, grant numbers 160156, 170161). We are grateful to Willem van der Bilt for providing data for Fig. 1 and for the Polish Polar Station in Hornsund for logistical support during the research. Constructive comments from two anonymous journal reviewers helped to improve the manuscript. Luoto , T P , Ojala , A E K , Arppe , L , Brooks , S J , Kurki , E , Oksman , M , Wooller , M J & Zajaczkowski , M 2018 , ' Synchronized proxy-based temperature reconstructions reveal mid- to late Holocene climate oscillations in High Arctic Svalbard ' , Journal of Quaternary Science , vol. 33 , no. 1 , pp. 93-99 . https://doi.org/10.1002/jqs.3001 ORCID: /0000-0001-6925-3688/work/41624905 ORCID: /0000-0003-4445-6096/work/90051670 http://hdl.handle.net/10138/323609 03156639-f040-44f8-b8a6-5290c3c8c073 85033219789 000423222600005 |
op_rights |
info:eu-repo/semantics/openAccess openAccess |
container_title |
Journal of Quaternary Science |
container_volume |
33 |
container_issue |
1 |
container_start_page |
93 |
op_container_end_page |
99 |
_version_ |
1796937025774944256 |