Evidence of long-term NAO influence on East-Central Europe winter precipitation from a guano-derived δ15N record
Currently there is a scarcity of paleo-records related to the North Atlantic Oscillation (NAO), particularly in East-Central Europe (ECE). Here we report δ15N analysis of guano from a cave in NW Romania with the intent of reconstructing past variation in ECE hydroclimate and examine NAO impacts on w...
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Online Access: | https://epic.awi.de/id/eprint/45771/ https://epic.awi.de/id/eprint/45771/1/Daniel-Scirep.pdf https://doi.org/10.1038/s41598-017-14488-5 https://hdl.handle.net/10013/epic.51901 https://hdl.handle.net/10013/epic.51901.d001 |
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ftawi:oai:epic.awi.de:45771 2024-09-15T18:23:33+00:00 Evidence of long-term NAO influence on East-Central Europe winter precipitation from a guano-derived δ15N record Cleary, Daniel M. Wynn, Jonathan G. Ionita, Monica Forray, Ferenc L. Onac, Bogdan P. 2017-10-26 application/pdf https://epic.awi.de/id/eprint/45771/ https://epic.awi.de/id/eprint/45771/1/Daniel-Scirep.pdf https://doi.org/10.1038/s41598-017-14488-5 https://hdl.handle.net/10013/epic.51901 https://hdl.handle.net/10013/epic.51901.d001 unknown Springer Nature https://epic.awi.de/id/eprint/45771/1/Daniel-Scirep.pdf https://hdl.handle.net/10013/epic.51901.d001 Cleary, D. M. , Wynn, J. G. , Ionita, M. orcid:0000-0001-8240-4380 , Forray, F. L. and Onac, B. P. (2017) Evidence of long-term NAO influence on East-Central Europe winter precipitation from a guano-derived δ15N record , Scientific Reports, 7 (1) . doi:10.1038/s41598-017-14488-5 <https://doi.org/10.1038/s41598-017-14488-5> , hdl:10013/epic.51901 EPIC3Scientific Reports, Springer Nature, 7(1), ISSN: 2045-2322 Article isiRev 2017 ftawi https://doi.org/10.1038/s41598-017-14488-5 2024-06-24T04:18:50Z Currently there is a scarcity of paleo-records related to the North Atlantic Oscillation (NAO), particularly in East-Central Europe (ECE). Here we report δ15N analysis of guano from a cave in NW Romania with the intent of reconstructing past variation in ECE hydroclimate and examine NAO impacts on winter precipitation. We argue that the δ15N values of guano indicate that the nitrogen cycle is hydrologically controlled and the δ15N values likely reflect winter precipitation related to nitrogen mineralization prior to the growing season. Drier conditions indicated by δ15N values at AD 1848–1852 and AD 1880–1930 correspond to the positive phase of the NAO. The increased frequency of negative phases of the NAO between AD 1940–1975 is contemporaneous with higher δ15N values (wetter conditions). A 4‰ decrease in δ15N values at the end of the 1970’s corresponds to a strong reduction in precipitation associated with a shift from negative to positive phase of the NAO. Using the relationship between NAO index and δ15N values in guano for the instrumental period, we reconstructed NAO-like phases back to AD 1650. Our results advocate that δ15N values of guano offer a proxy of the NAO conditions in the more distant past, helping assess its predictability. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Scientific Reports 7 1 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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Currently there is a scarcity of paleo-records related to the North Atlantic Oscillation (NAO), particularly in East-Central Europe (ECE). Here we report δ15N analysis of guano from a cave in NW Romania with the intent of reconstructing past variation in ECE hydroclimate and examine NAO impacts on winter precipitation. We argue that the δ15N values of guano indicate that the nitrogen cycle is hydrologically controlled and the δ15N values likely reflect winter precipitation related to nitrogen mineralization prior to the growing season. Drier conditions indicated by δ15N values at AD 1848–1852 and AD 1880–1930 correspond to the positive phase of the NAO. The increased frequency of negative phases of the NAO between AD 1940–1975 is contemporaneous with higher δ15N values (wetter conditions). A 4‰ decrease in δ15N values at the end of the 1970’s corresponds to a strong reduction in precipitation associated with a shift from negative to positive phase of the NAO. Using the relationship between NAO index and δ15N values in guano for the instrumental period, we reconstructed NAO-like phases back to AD 1650. Our results advocate that δ15N values of guano offer a proxy of the NAO conditions in the more distant past, helping assess its predictability. |
format |
Article in Journal/Newspaper |
author |
Cleary, Daniel M. Wynn, Jonathan G. Ionita, Monica Forray, Ferenc L. Onac, Bogdan P. |
spellingShingle |
Cleary, Daniel M. Wynn, Jonathan G. Ionita, Monica Forray, Ferenc L. Onac, Bogdan P. Evidence of long-term NAO influence on East-Central Europe winter precipitation from a guano-derived δ15N record |
author_facet |
Cleary, Daniel M. Wynn, Jonathan G. Ionita, Monica Forray, Ferenc L. Onac, Bogdan P. |
author_sort |
Cleary, Daniel M. |
title |
Evidence of long-term NAO influence on East-Central Europe winter precipitation from a guano-derived δ15N record |
title_short |
Evidence of long-term NAO influence on East-Central Europe winter precipitation from a guano-derived δ15N record |
title_full |
Evidence of long-term NAO influence on East-Central Europe winter precipitation from a guano-derived δ15N record |
title_fullStr |
Evidence of long-term NAO influence on East-Central Europe winter precipitation from a guano-derived δ15N record |
title_full_unstemmed |
Evidence of long-term NAO influence on East-Central Europe winter precipitation from a guano-derived δ15N record |
title_sort |
evidence of long-term nao influence on east-central europe winter precipitation from a guano-derived δ15n record |
publisher |
Springer Nature |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/45771/ https://epic.awi.de/id/eprint/45771/1/Daniel-Scirep.pdf https://doi.org/10.1038/s41598-017-14488-5 https://hdl.handle.net/10013/epic.51901 https://hdl.handle.net/10013/epic.51901.d001 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
EPIC3Scientific Reports, Springer Nature, 7(1), ISSN: 2045-2322 |
op_relation |
https://epic.awi.de/id/eprint/45771/1/Daniel-Scirep.pdf https://hdl.handle.net/10013/epic.51901.d001 Cleary, D. M. , Wynn, J. G. , Ionita, M. orcid:0000-0001-8240-4380 , Forray, F. L. and Onac, B. P. (2017) Evidence of long-term NAO influence on East-Central Europe winter precipitation from a guano-derived δ15N record , Scientific Reports, 7 (1) . doi:10.1038/s41598-017-14488-5 <https://doi.org/10.1038/s41598-017-14488-5> , hdl:10013/epic.51901 |
op_doi |
https://doi.org/10.1038/s41598-017-14488-5 |
container_title |
Scientific Reports |
container_volume |
7 |
container_issue |
1 |
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1810463774529814528 |