Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rapid climatic shifts in southern Greece during Marine Isotope Stages 5a-3
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
Geological Survey of Israel.
(English)In: Palaeogeography, Palaeoclimatology, Palaeoecology, ISSN 0031-0182, E-ISSN 1872-616XArticle in journal (Refereed) Submitted
Abstract [en]

We present a speleothem based stable isotope (δ13C, δ18O) record from southern Greece covering a period from 79±5.8 ka to 37±3 ka, i.e. the end of Marine Isotope Stage (MIS) 5a and large parts of MIS 4 and MIS 3. The record from Glyfada Cave provides a U-Th dated proxy paleoclimate record from Greece, covering this time period, and shows that the climate over the Peloponnese rapidly responded to interstadial and stadial conditions over Greenland. During stadial (interstadial) conditions colder (warmer) and drier (wetter) conditions are reflected by depleted (enriched) δ13C-values in the speleothems from Glyfada Cave. Depositional hiatuses in Glyfada Cave correspond to periods of severe cold conditions in the northern Hemisphere and reduced precipitation over the Peloponnese most likely due to a southward displacement of Mediterranean cyclone tracks due to expanding northern ice sheets and increased snow cover over the European continent. By comparing our independently dated record with previously published pollen studies from Greece a time lag between the records from Ioannina and Megali Limni and Glyfada is evident. The match in time between the Glyfada speleothem record and the Tenaghi Philippon pollen record, when tuned to NGRIP, is rather precise.

Keyword [en]
Paleoclimate, Speleothems, Stable isotopes, Dansgaard-Oeschger cycles, Eastern Mediterranean, Peloponnese, Southern Greece
National Category
Climate Research
Identifiers
URN: urn:nbn:se:su:diva-108042OAI: oai:DiVA.org:su-108042DiVA: diva2:753349
Available from: 2014-10-07 Created: 2014-10-07 Last updated: 2017-12-05
In thesis
1. Climate in the eastern Mediterranean during the Holocene and beyond – A Peloponnesian perspective
Open this publication in new window or tab >>Climate in the eastern Mediterranean during the Holocene and beyond – A Peloponnesian perspective
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis contributes increased knowledge about climate variability during the late Quaternary in the eastern Mediterranean. Results from a paleoclimate review reveal that regional wetter conditions from 6000 to 5400 years BP were replaced by a less wet period from 5400 to 4600 years BP and to fully arid conditions around 4600 years BP. The data available, however, show that there is not enough evidence to support the notion of a widespread climate event with rapidly drying conditions in the region around 4200 years ago. The review further highlights the lack of paleoclimate data from the archaeologically rich Peloponnese Peninsula. This gap is addressed in this thesis by the provision of new paleoclimate records from the Peloponnese. One stalagmite from Kapsia Cave and two stalagmites from Glyfada Cave were dated and analyzed for stable oxygen (δ18O) and carbon (δ13C) isotopes. The Glyfada record covers a period from ~78 ka to ~37 ka and shows that the climate in this region responded rapidly to changes in temperatures over Greenland. During Greenland stadial (interstadial) conditions colder (warmer) and drier (wetter) conditions are reflected by depleted (enriched) δ13C-values in the speleothems. The Kapsia record covers a period from ~2900 to ~1100 years BP. A comparison between the modern stalagmite top isotopes and meteorological data shows that a main control on stalagmite δ18O is wet season precipitation amount. The δ18O record from Kapsia indicates cyclical humidity changes of close to 500 years, with rapid shifts toward wetter conditions followed by slowly developing aridity. Superimposed on this signal is a centennial signal of precipitation variability. A second speleothem from Kapsia with multiple horizons of fine sediments from past flood events intercalated with the calcite is used to develop a new, quick and non-destructive method for tracing flood events in speleothems by analyzing a thick section with an XRF core scanner.

Place, publisher, year, edition, pages
Stockholm: Department of Physical Geography and Quaternary Geology, Stockholm University, 2014. 52 p.
Series
Dissertations from the Department of Physical Geography, ISSN 1653-7211 ; 45
Keyword
Stable isotopes, U-Th dating, stalagmites, climate variability, flooding history, eastern Mediterranean, southern Greece, Holocene, Pleistocene
National Category
Climate Research
Research subject
Physical Geography
Identifiers
urn:nbn:se:su:diva-108046 (URN)978-91-7447-995-9 (ISBN)
Public defence
2014-11-14, Nordenskiöldsalen, Geovetenskapens hus, Svante Arrhenius väg 12, Stockholm, 13:00 (English)
Opponent
Supervisors
Note

At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: Submitted. Paper 4: Accepted.

Available from: 2014-10-23 Created: 2014-10-07 Last updated: 2015-10-19Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Finné, MartinHolmgren, Karin
By organisation
Department of Physical Geography and Quaternary Geology
In the same journal
Palaeogeography, Palaeoclimatology, Palaeoecology
Climate Research

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 251 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf