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Atmospheric methane, southern European vegetation and low-mid latitude links on orbital and millennial timescales

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Pollen records from marine and terrestrial sequences in southern Europe reveal a strong coherence between changes in tree populations and atmospheric methane concentrations over the last 800 thousand years. Variations in the continental hydrological balance provide a link for the observed patterns, leading to concomitant changes in southern European vegetation, and low-latitude wetland extent and methane/ volatile organic compound emissions, although additional contributions to the methane budget from extratropical sources are not excluded. Here we propose that the close coupling between low- and mid- latitude hydrological changes reflects shifts in the mean latitudinal position of the Intertropical Convergence Zone, which determines the extent to which southern Europe is dominated by subtropical or mid/high- latitude influences. This provides a conceptual framework within which to view vegetation variability in southern Europe on orbital and millennial timescales.

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Tzedakis, P.C., Pälike, H., Roucoux, K.H. and de Abreau, L. (2009) Atmospheric methane, southern European vegetation and low-mid latitude links on orbital and millennial timescales Earth and Planetary Science Letters, 277, (3-4), pp. 307-317. (doi:10.1016/j.epsl.2008.10.027).

More information

Published date: 30 January 2009
Keywords: methane, pollen, vegetation, mediterranean, itcz, orbital, millennial
Organisations: Ocean and Earth Science


Local EPrints ID: 64845
ISSN: 0012-821X
PURE UUID: c7de90df-297c-473f-a718-bdeae1ac677b

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Date deposited: 16 Jan 2009
Last modified: 17 Jul 2017 14:11

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Author: P.C. Tzedakis
Author: H. Pälike
Author: K.H. Roucoux
Author: L. de Abreau

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