Cargando…

North Atlantic forcing of moisture delivery to Europe throughout the Holocene

Century-to-millennial scale fluctuations in precipitation and temperature are an established feature of European Holocene climates. Changes in moisture delivery are driven by complex interactions between ocean moisture sources and atmospheric circulation modes, making it difficult to resolve the dri...

Descripción completa

Detalles Bibliográficos
Autores principales: Smith, Andrew C., Wynn, Peter M., Barker, Philip A., Leng, Melanie J., Noble, Stephen R., Tych, Wlodek
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4842961/
https://www.ncbi.nlm.nih.gov/pubmed/27109216
http://dx.doi.org/10.1038/srep24745
_version_ 1782428606234886144
author Smith, Andrew C.
Wynn, Peter M.
Barker, Philip A.
Leng, Melanie J.
Noble, Stephen R.
Tych, Wlodek
author_facet Smith, Andrew C.
Wynn, Peter M.
Barker, Philip A.
Leng, Melanie J.
Noble, Stephen R.
Tych, Wlodek
author_sort Smith, Andrew C.
collection PubMed
description Century-to-millennial scale fluctuations in precipitation and temperature are an established feature of European Holocene climates. Changes in moisture delivery are driven by complex interactions between ocean moisture sources and atmospheric circulation modes, making it difficult to resolve the drivers behind millennial scale variability in European precipitation. Here, we present two overlapping decadal resolution speleothem oxygen isotope (δ(18)O) records from a cave on the Atlantic coastline of northern Iberia, covering the period 12.1–0 ka. Speleothem δ(18)O reveals nine quasi-cyclical events of relatively wet-to-dry climatic conditions during the Holocene. Dynamic Harmonic Regression modelling indicates that changes in precipitation occurred with a ~1500 year frequency during the late Holocene and at a shorter length during the early Holocene. The timing of these cycles coincides with changes in North Atlantic Ocean conditions, indicating a connectivity between ocean conditions and Holocene moisture delivery. Early Holocene climate is potentially dominated by freshwater outburst events, whilst ~1500 year cycles in the late Holocene are more likely driven by changes internal to the ocean system. This is the first continental record of its type that clearly demonstrates millennial scale connectivity between the pulse of the ocean and precipitation over Europe through the entirety of the Holocene.
format Online
Article
Text
id pubmed-4842961
institution National Center for Biotechnology Information
language English
publishDate 2016
publisher Nature Publishing Group
record_format MEDLINE/PubMed
spelling pubmed-48429612016-04-29 North Atlantic forcing of moisture delivery to Europe throughout the Holocene Smith, Andrew C. Wynn, Peter M. Barker, Philip A. Leng, Melanie J. Noble, Stephen R. Tych, Wlodek Sci Rep Article Century-to-millennial scale fluctuations in precipitation and temperature are an established feature of European Holocene climates. Changes in moisture delivery are driven by complex interactions between ocean moisture sources and atmospheric circulation modes, making it difficult to resolve the drivers behind millennial scale variability in European precipitation. Here, we present two overlapping decadal resolution speleothem oxygen isotope (δ(18)O) records from a cave on the Atlantic coastline of northern Iberia, covering the period 12.1–0 ka. Speleothem δ(18)O reveals nine quasi-cyclical events of relatively wet-to-dry climatic conditions during the Holocene. Dynamic Harmonic Regression modelling indicates that changes in precipitation occurred with a ~1500 year frequency during the late Holocene and at a shorter length during the early Holocene. The timing of these cycles coincides with changes in North Atlantic Ocean conditions, indicating a connectivity between ocean conditions and Holocene moisture delivery. Early Holocene climate is potentially dominated by freshwater outburst events, whilst ~1500 year cycles in the late Holocene are more likely driven by changes internal to the ocean system. This is the first continental record of its type that clearly demonstrates millennial scale connectivity between the pulse of the ocean and precipitation over Europe through the entirety of the Holocene. Nature Publishing Group 2016-04-25 /pmc/articles/PMC4842961/ /pubmed/27109216 http://dx.doi.org/10.1038/srep24745 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Smith, Andrew C.
Wynn, Peter M.
Barker, Philip A.
Leng, Melanie J.
Noble, Stephen R.
Tych, Wlodek
North Atlantic forcing of moisture delivery to Europe throughout the Holocene
title North Atlantic forcing of moisture delivery to Europe throughout the Holocene
title_full North Atlantic forcing of moisture delivery to Europe throughout the Holocene
title_fullStr North Atlantic forcing of moisture delivery to Europe throughout the Holocene
title_full_unstemmed North Atlantic forcing of moisture delivery to Europe throughout the Holocene
title_short North Atlantic forcing of moisture delivery to Europe throughout the Holocene
title_sort north atlantic forcing of moisture delivery to europe throughout the holocene
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4842961/
https://www.ncbi.nlm.nih.gov/pubmed/27109216
http://dx.doi.org/10.1038/srep24745
work_keys_str_mv AT smithandrewc northatlanticforcingofmoisturedeliverytoeuropethroughouttheholocene
AT wynnpeterm northatlanticforcingofmoisturedeliverytoeuropethroughouttheholocene
AT barkerphilipa northatlanticforcingofmoisturedeliverytoeuropethroughouttheholocene
AT lengmelaniej northatlanticforcingofmoisturedeliverytoeuropethroughouttheholocene
AT noblestephenr northatlanticforcingofmoisturedeliverytoeuropethroughouttheholocene
AT tychwlodek northatlanticforcingofmoisturedeliverytoeuropethroughouttheholocene