Twentieth-century warming revives the world's northernmost lake
Although recent ecological changes are widespread in Arctic lakes, it remains unclear whether they are more strongly associated with climate warming or the deposition of reactive nitrogen (Nr) from anthropogenic sources. We developed a 3500-yr paleolimnological record from the world's northernm...
Published in: | Geology |
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ftcopenhagenunip:oai:pure.atira.dk:publications/33ea6abd-4d4d-403a-88f0-8db3eaf34a46 2023-08-27T04:07:49+02:00 Twentieth-century warming revives the world's northernmost lake Perren, Bianca B. Wolfe, Alexander P. Cooke, Colin A. Kjær, Kurt H. Mazzucchi, David Steig, Eric J. 2012 https://curis.ku.dk/portal/da/publications/twentiethcentury-warming-revives-the-worlds-northernmost-lake(33ea6abd-4d4d-403a-88f0-8db3eaf34a46).html https://doi.org/10.1130/G33621.1 eng eng info:eu-repo/semantics/closedAccess Perren , B B , Wolfe , A P , Cooke , C A , Kjær , K H , Mazzucchi , D & Steig , E J 2012 , ' Twentieth-century warming revives the world's northernmost lake ' , Geology , vol. 40 , no. 11 , pp. 1003-1006 . https://doi.org/10.1130/G33621.1 article 2012 ftcopenhagenunip https://doi.org/10.1130/G33621.1 2023-08-02T23:02:59Z Although recent ecological changes are widespread in Arctic lakes, it remains unclear whether they are more strongly associated with climate warming or the deposition of reactive nitrogen (Nr) from anthropogenic sources. We developed a 3500-yr paleolimnological record from the world's northernmost lake to explore this question. Microfossils indicate that siliceous diatoms and chrysophytes were abundant initially, but disappeared 2400 yr ago in concert with Neoglacial cooling. Microfossils reappear in 20th-century sediments and reach unprecedented concentrations in sediments deposited after ca. A.D. 1980, tracking increasing summer temperatures in the absence of evidence for atmospheric nutrient subsidies. These results indicate that current warming in northern Greenland is unprecedented in the context of the past 2400 yr, and that climate change alone is responsible for the marked biological changes observed. Article in Journal/Newspaper Arctic Climate change Greenland University of Copenhagen: Research Arctic Greenland Geology 40 11 1003 1006 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Although recent ecological changes are widespread in Arctic lakes, it remains unclear whether they are more strongly associated with climate warming or the deposition of reactive nitrogen (Nr) from anthropogenic sources. We developed a 3500-yr paleolimnological record from the world's northernmost lake to explore this question. Microfossils indicate that siliceous diatoms and chrysophytes were abundant initially, but disappeared 2400 yr ago in concert with Neoglacial cooling. Microfossils reappear in 20th-century sediments and reach unprecedented concentrations in sediments deposited after ca. A.D. 1980, tracking increasing summer temperatures in the absence of evidence for atmospheric nutrient subsidies. These results indicate that current warming in northern Greenland is unprecedented in the context of the past 2400 yr, and that climate change alone is responsible for the marked biological changes observed. |
format |
Article in Journal/Newspaper |
author |
Perren, Bianca B. Wolfe, Alexander P. Cooke, Colin A. Kjær, Kurt H. Mazzucchi, David Steig, Eric J. |
spellingShingle |
Perren, Bianca B. Wolfe, Alexander P. Cooke, Colin A. Kjær, Kurt H. Mazzucchi, David Steig, Eric J. Twentieth-century warming revives the world's northernmost lake |
author_facet |
Perren, Bianca B. Wolfe, Alexander P. Cooke, Colin A. Kjær, Kurt H. Mazzucchi, David Steig, Eric J. |
author_sort |
Perren, Bianca B. |
title |
Twentieth-century warming revives the world's northernmost lake |
title_short |
Twentieth-century warming revives the world's northernmost lake |
title_full |
Twentieth-century warming revives the world's northernmost lake |
title_fullStr |
Twentieth-century warming revives the world's northernmost lake |
title_full_unstemmed |
Twentieth-century warming revives the world's northernmost lake |
title_sort |
twentieth-century warming revives the world's northernmost lake |
publishDate |
2012 |
url |
https://curis.ku.dk/portal/da/publications/twentiethcentury-warming-revives-the-worlds-northernmost-lake(33ea6abd-4d4d-403a-88f0-8db3eaf34a46).html https://doi.org/10.1130/G33621.1 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Climate change Greenland |
genre_facet |
Arctic Climate change Greenland |
op_source |
Perren , B B , Wolfe , A P , Cooke , C A , Kjær , K H , Mazzucchi , D & Steig , E J 2012 , ' Twentieth-century warming revives the world's northernmost lake ' , Geology , vol. 40 , no. 11 , pp. 1003-1006 . https://doi.org/10.1130/G33621.1 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1130/G33621.1 |
container_title |
Geology |
container_volume |
40 |
container_issue |
11 |
container_start_page |
1003 |
op_container_end_page |
1006 |
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1775348522255646720 |