Reconciling diverse lacustrine and terrestrial system response to penultimate deglacial warming in southern Europe

Hdl Handle:
http://hdl.handle.net/10034/579231
Title:
Reconciling diverse lacustrine and terrestrial system response to penultimate deglacial warming in southern Europe
Authors:
Wilson, Graham P.; Reed, Jane M.; Frogley, Michael R.; Hughes, Philip D.; Tzedakis, Polychronis C.
Abstract:
Unlike the most recent deglaciation, the regional expression of climate changes during the penultimate deglaciation remains understudied, even though it led into a period of excess warmth with estimates of global average temperature 1‒2 °C, and sea level ~6 m, above preindustrial values. We present the first complete high-resolution southern European diatom record capturing the penultimate glacial-interglacial transition, from Lake Ioannina (northwest Greece). It forms part of a suite of proxies selected to assess the character and phase relationships of terrestrial and aquatic ecosystem response to rapid climate warming, and to resolve apparent conflicts in proxy evidence for regional paleohydrology. The diatom data suggest a complex penultimate deglaciation driven primarily by multiple oscillations in lake level, and provide firm evidence for the regional influence of abrupt changes in North Atlantic conditions. There is diachroneity in lake and terrestrial ecosystem response to warming at the onset of the last interglacial, with an abrupt increase in lake level occurring ~2.7 k.y. prior to sustained forest expansion with peak precipitation. We identify the potentially important role of direct input of snow melt and glacial meltwater transfer to the subterranean karst system in response to warming, which would cause rising regional groundwater levels. This explanation, and the greater sensitivity of diatoms to subtle changes in temperature, reconciles the divergent lacustrine and terrestrial proxy evidence and highlights the sensitivity of lakes situated in mountainous karstic environments to past climate warming.
Affiliation:
University of Chester, University of Hull, University of Sussex, University of Manchester, University College London
Citation:
Wilson, G. P., Reed, J. M., Frogley, M. R., Hughes, P. D. & Tzedakis, P. C. (2015). Reconciling diverse lacustrine and terrestrial system response to penultimate deglacial warming in southern Europe. Geology, 43(9), 819-822.doi: 10.1130/g36807.1
Publisher:
The Geological Society of America
Journal:
Geology
Publication Date:
5-Aug-2015
URI:
http://hdl.handle.net/10034/579231
DOI:
10.1130/G36807.1
Additional Links:
http://geology.gsapubs.org/
Type:
Article
Language:
en
ISSN:
0091-7613
EISSN:
1943-2682
Sponsors:
Funded by the UK Natural Environment Research Council (NERC grant numbers NE/C507210/1 and NER/A/S/2002/00946)
Appears in Collections:
Geography and Development Studies

Full metadata record

DC FieldValue Language
dc.contributor.authorWilson, Graham P.en
dc.contributor.authorReed, Jane M.en
dc.contributor.authorFrogley, Michael R.en
dc.contributor.authorHughes, Philip D.en
dc.contributor.authorTzedakis, Polychronis C.en
dc.date.accessioned2015-10-05T10:40:32Zen
dc.date.available2015-10-05T10:40:32Zen
dc.date.issued2015-08-05en
dc.identifier.citationWilson, G. P., Reed, J. M., Frogley, M. R., Hughes, P. D. & Tzedakis, P. C. (2015). Reconciling diverse lacustrine and terrestrial system response to penultimate deglacial warming in southern Europe. Geology, 43(9), 819-822.doi: 10.1130/g36807.1en
dc.identifier.issn0091-7613en
dc.identifier.doi10.1130/G36807.1en
dc.identifier.otherhttp://geology.gsapubs.org/content/43/9/819.full.pdf+htmlen
dc.identifier.urihttp://hdl.handle.net/10034/579231en
dc.description.abstractUnlike the most recent deglaciation, the regional expression of climate changes during the penultimate deglaciation remains understudied, even though it led into a period of excess warmth with estimates of global average temperature 1‒2 °C, and sea level ~6 m, above preindustrial values. We present the first complete high-resolution southern European diatom record capturing the penultimate glacial-interglacial transition, from Lake Ioannina (northwest Greece). It forms part of a suite of proxies selected to assess the character and phase relationships of terrestrial and aquatic ecosystem response to rapid climate warming, and to resolve apparent conflicts in proxy evidence for regional paleohydrology. The diatom data suggest a complex penultimate deglaciation driven primarily by multiple oscillations in lake level, and provide firm evidence for the regional influence of abrupt changes in North Atlantic conditions. There is diachroneity in lake and terrestrial ecosystem response to warming at the onset of the last interglacial, with an abrupt increase in lake level occurring ~2.7 k.y. prior to sustained forest expansion with peak precipitation. We identify the potentially important role of direct input of snow melt and glacial meltwater transfer to the subterranean karst system in response to warming, which would cause rising regional groundwater levels. This explanation, and the greater sensitivity of diatoms to subtle changes in temperature, reconciles the divergent lacustrine and terrestrial proxy evidence and highlights the sensitivity of lakes situated in mountainous karstic environments to past climate warming.en
dc.description.sponsorshipFunded by the UK Natural Environment Research Council (NERC grant numbers NE/C507210/1 and NER/A/S/2002/00946)en
dc.language.isoenen
dc.publisherThe Geological Society of Americaen
dc.relation.urlhttp://geology.gsapubs.org/en
dc.subjectPenultimate deglacialen
dc.subjectSouthern Europeen
dc.subjectHeinrich Event 11en
dc.subjectDiatomsen
dc.subjectPalaeolimnologyen
dc.titleReconciling diverse lacustrine and terrestrial system response to penultimate deglacial warming in southern Europeen
dc.typeArticleen
dc.identifier.eissn1943-2682en
dc.contributor.departmentUniversity of Chester, University of Hull, University of Sussex, University of Manchester, University College Londonen
dc.identifier.journalGeologyen
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