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Precessional forcing of tropical vegetation carbon storage

Gosling, William D. and Holden, Philip B. (2011). Precessional forcing of tropical vegetation carbon storage. Journal of Quaternary Science, 26(5) pp. 463–467.

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DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1002/jqs.1514
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Abstract

Since the Mid-Pleistocene Revolution, which occurred about one million years ago, global temperatures have fluctuated with a quasi-periodicity of ~100 thousand years (kyr). The pattern of past change in the extent of woodlands, and therefore by inference vegetation carbon storage, has been demonstrated to have a strong positive link with this global temperature change at high and mid latitudes. However, understanding of climate systems and ecosystem function indicates that the pattern of woodland change at low latitudes may follow a fundamentally different pattern. We present output from the intermediate complexity model GENIE-1, comprising a single transient simulation over the last 800 kyr and a 174-member ensemble of 130 kyr transient simulations over the last glacial cycle. These simulations suggest that whilst vegetation carbon storage in mid-high northern latitudes robustly follows the characteristic ~100 kyr cycle, this signal is not a robust feature of tropical vegetation which is subject to stronger direct forcing by the precessional (21 kyr) orbital cycle (albeit with a highly uncertain response). We conclude that the correlation of palaeoenvironmental records from low latitudes with global temperature change must be done with caution.

Item Type: Journal Article
Copyright Holders: 2011 John Wiley & Sons, Ltd.
ISSN: 1099-1417
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetNERC (Natural Environment Research Council)
Not SetNot SetINSU (France)
Not SetNE/E007600/1QUEST-DESIRE
Extra Information: The definitive version is available at www3.interscience.wiley.com

Palaeoenvrionmental Change Research group web page: http://www.open.ac.uk/science/earthsciences/palaeo/
Keywords: carbon storage; Earth system modelling; GENIE; orbital forcing; seasonality
Academic Unit/Department: Science > Environment, Earth and Ecosystems
Science
Interdisciplinary Research Centre: OpenSpace Research Centre (OSRC)
Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 28954
Depositing User: William Gosling
Date Deposited: 21 Jun 2011 14:24
Last Modified: 06 Aug 2013 16:15
URI: http://oro.open.ac.uk/id/eprint/28954
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