Precessional forcing of tropical vegetation carbon storage
Article first published online: 13 JUN 2011
Copyright © 2011 John Wiley & Sons, Ltd.
Journal of Quaternary Science
Volume 26, Issue 5, pages 463–467, July 2011
How to Cite
Gosling, W. D. and Holden, P. B. (2011), Precessional forcing of tropical vegetation carbon storage. J. Quaternary Sci., 26: 463–467. doi: 10.1002/jqs.1514
- Issue published online: 24 JUN 2011
- Article first published online: 13 JUN 2011
- Manuscript Accepted: 17 APR 2011
- Manuscript Revised: 24 JAN 2011
- Manuscript Received: 24 JUN 2010
- carbon storage;
- Earth system modelling;
- orbital forcing;
Since the Mid Pleistocene Revolution, which occurred about one million years ago, global temperatures have fluctuated with a quasi-periodicity of ca. 100 ka. 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 ka and a 174-member ensemble of 130 ka transient simulations over the last glacial cycle. These simulations suggest that while vegetation carbon storage in mid–high northern latitudes robustly follows the characteristic ca. 100 ka cycle, this signal is not a robust feature of tropical vegetation, which is subject to stronger direct forcing by the precessional (21 ka) 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. Copyright © 2011 John Wiley & Sons, Ltd.