publication . Doctoral thesis . 2013

What drove the methane cycle in the past - evidence from carbon isotopic data of methane enclosed in polar ice cores

Möller, Lars;
Open Access English
  • Published: 01 Jan 2013
  • Country: Germany
Abstract
During the last glacial cycle, greenhouse gas concentrations fluctuated on decadal and longer timescales. Concentrations of methane, as measured in polar ice cores, show a close connection with Northern Hemisphere temperature variability, but the contribution of the various methane sources and sinks to changes in concentration is still a matter of debate. This thesis assess changes in methane cycling over the past 160,000 years by measurements of the carbon isotopic composition d13C of methane in Antarctic ice cores from Dronning Maud Land and Vostok. Major findings are that variations in the d13C of methane are not generally correlated with changes in atmospher...
Subjects
free text keywords: Methane, paleo-climate, ice-cores, EDML, Vostok, carbon isotopes, tropical wetlands, ddc:550
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