An Oxygen-Isotope Paleothermometer from Ice in Siberian Permafrost

Dados Bibliográficos

ID24085658
AutoresVladimir I Nikolayev, Dmitry V Mikhalev
Ano1995
Volume43
Fascículo1
Páginas14-21
Data de publicação1995-01-01
Peer ReviewedSim
Open AccessSim
TipoARTICLE
PeriódicoQuaternary Research (JOURNAL)
Identificadores do periódicoISSN: 0033-5894 • E-ISSN: 1096-0287
EditoraCambridge University Press (CUP) (PUBLISHER)
DOI10.1006/qres.1995.1002
OpenAlexW2072617905
IdiomaEN
Citações recebidas4
Referências citadas10

There is a clear linear relationship between mean annual (or seasonal) air temperature at the Earth's surface and the mean oxygen isotopic composition of precipitation in polar regions. Whereas this relationship is well preserved in polar ice caps, it may not be in permafrost because freshly deposited snow in permafrost areas is subjected to great deflation and drifting by wind. Moreover, melting and freezing within the snow cover and the active layer can lead to isotopic fractionation. The δ 18 O of recent ground ice also depends on its geomorphic context and on the lithology (content of organic matter) of ice-containing sediments. Nevertheless, mean cold-season air temperature near the ground surface and δ 18 O in recent ground ice are highly correlated. Therefore, the δ 18 O of ground ice (ice cement and segregated ice) in permafrost areas can be used for paleoclimatic reconstructions.

Atmospheric sciences · Climatology · Cryosphere · Geochemistry · Geomorphology · Isotopes of oxygen · Permafrost · Polar · Sea ice · Snow · Climate change and permafrost · Geology · Groundwater and Isotope Geochemistry · Methane Hydrates and Related Phenomena · Oceanography