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), 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 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.

Item Type: Article
ISSNs: 0012-821X (print)
Related URLs:
Keywords: methane, pollen, vegetation, mediterranean, itcz, orbital, millennial
Subjects: Q Science > QE Geology
Divisions: University Structure - Pre August 2011 > School of Ocean & Earth Science (SOC/SOES)
ePrint ID: 64845
Date Deposited: 16 Jan 2009
Last Modified: 27 Mar 2014 18:46
URI: http://eprints.soton.ac.uk/id/eprint/64845

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