Oxygen isotopic composition in diatom algae frustules from Lake Baikal sediments: Annual mean temperature variations during the last 40 Ka

Oxygen isotopic composition in diatom algae frustules from Lake Baikal sediments: Annual mean temperature variations during the last 40 Ka

The oxygen isotopic compositions of ice sheets in Antarctica and Greenland and biogenic carbonates from deep-sea oceanic sediments represent a source of reliable information on global climate changes. During glaciations, the 16O-rich isotope is largely accumulated in polar ice sheets, while seawater...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Doklady earth sciences 2007-03, Vol.413 (1), p.206-209
Hauptverfasser: Kalmychkov, G V, Kuz'min, MI, Pokrovskii, B G, Kostrova, S S
Format: Artikel
Sprache:eng
Schlagworte:
Algae
Bacillariophyceae
Carbonates
Climate change
Deep sea
Freshwater
Geochemistry
Glaciers
Global climate
Isotopes
Lakes
Oxygen
Seawater
Sediments
Temperature effects
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The oxygen isotopic compositions of ice sheets in Antarctica and Greenland and biogenic carbonates from deep-sea oceanic sediments represent a source of reliable information on global climate changes. During glaciations, the 16O-rich isotope is largely accumulated in polar ice sheets, while seawater becomes enriched in 18O. Warming promotes glacier melting and concentration of the oxygen light isotope in atmospheric moisture and seawater. This is recorded in remains of biogenic carbonate organisms, for example, shells of fossil foraminifers.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X07020158