Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Modest summer temperature variability during DO cycles in western Europe - an answer to a long time paradox?
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi och kvartärgeologi (INK).
Visa övriga samt affilieringar
Ansvarig organisation
Manuskript (Övrigt vetenskapligt)
Identifikatorer
URN: urn:nbn:se:su:diva-25540OAI: oai:DiVA.org:su-25540DiVA, id: diva2:199924
Anmärkning
Part of urn:nbn:se:su:diva-8259Tillgänglig från: 2008-10-23 Skapad: 2008-10-10 Senast uppdaterad: 2010-01-13Bibliografiskt granskad
Ingår i avhandling
1. Dansgaard-Oeschger cycles and Heinrich events in western Europe - A diatom perspective
Öppna denna publikation i ny flik eller fönster >>Dansgaard-Oeschger cycles and Heinrich events in western Europe - A diatom perspective
2008 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The last glacial period was characterised by several abrupt climatic shifts referred to as Dansgaard-Oeschger (DO) cycles and Heinrich events. These shifts were most frequent between 60,000 and 20,000 years before present coinciding with Marine Isotope Stages (MIS) 3 and 2. DO cycles and Heinrich events have been most thoroughly investigated in marine and ice core records while their impact on terrestrial environments is less well known. The high-resolution, multi-proxy investigation of a long sediment sequence, obtained from the former lake at Les Echets in France, aims at filling this gap and allows determining the impact of these climatic events on the lake and its catchment. The site and its surroundings experienced distinct shifts in lake organic productivity and catchment conditions as a consequence of DO climate variability and Heinrich events. The detailed analysis of the fossil diatom record shows distinct changes in diatom productivity, diversity and community composition, which are most likely due to variations in the length of lake ice cover, thermal stratification regimes and catchment conditions during a DO cycle. The distinct reduction in lake organic productivity and particularly low concentrations of diatom valves during intervals corresponding to Heinrich events suggest that these cold and arid phases had the most severe impact on the paleolake at Les Echets. The results of this thesis provide new insight into the impact of abrupt climate change on lacustrine ecosystems and show the potential of high-resolution and multi-proxy studies in paleoenvironmental research.

Ort, förlag, år, upplaga, sidor
Stockholm: Institutionen för naturgeografi och kvartärgeologi, 2008
Serie
Dissertations from the Department of Physical Geography and Quaternary Geology, ISSN 1653-7211 ; 16
Nyckelord
Dansgaard-Oescher cycles, Heinrich events, MIS 3 and 2, diatoms, Les Echets, France
Nationell ämneskategori
Geologi
Forskningsämne
kvartärgeologi
Identifikatorer
urn:nbn:se:su:diva-8259 (URN)978-91-7155-758-2 (ISBN)
Disputation
2008-11-14, William-Olssonsalen, Geovetenskapens hus, Svante Arrhenius väg 8 A, Stockholm, 13:00
Opponent
Handledare
Tillgänglig från: 2008-10-23 Skapad: 2008-10-10Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Av organisationen
Institutionen för naturgeografi och kvartärgeologi (INK)

Sök vidare utanför DiVA

GoogleGoogle Scholar

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 190 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf