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


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).

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Description/Abstract

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 re?ects 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 in?uences. This provides a conceptual framework within which to view vegetation variability in southern Europe on orbital and millennial timescales.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.epsl.2008.10.027
ISSNs: 0012-821X (print)
Keywords: methane, pollen, vegetation, mediterranean, itcz, orbital, millennial
Subjects:
ePrint ID: 64845
Date :
Date Event
30 January 2009Published
Date Deposited: 16 Jan 2009
Last Modified: 16 Apr 2017 17:18
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/64845

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