Tudhope, A.W., Chilcott, C.P., McCulloch, M.T., Cook, E.R., Chappell, J., Ellam, R.M., Lea, D.W., Lough, J.M. and Shimmield, G.B. (2001) Variability in the El Nino - Southern oscillation through a glacial-interglacial cycle. Science, 291(5508), pp. 1511-1517. (doi: 10.1126/science.1057969)
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Publisher's URL: http://dx.doi.org/10.1126/science.1057969
Abstract
The El Nino-Southern Oscillation (ENSO) is the most potent source of interannual climate variability. Uncertainty surrounding the impact of greenhouse warming on ENSO strength and frequency has stimulated efforts to develop a better understanding of the sensitivity of ENSO to climate change, Here we use annually banded corals from Papua New Guinea to show that ENSO has existed for the past 130,000 years, operating even during "glacial" times of substantially reduced regional and global temperature and changed solar forcing. However, we also find that during the 20th century ENSO has been strong compared with ENSO of previous cool (glacial) and warm (interglacial) times. The observed pattern of change in amplitude may be due to the combined effects of ENSO dampening during cool glacial conditions and ENSO forcing by precessional orbital variations.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Ellam, Professor Rob |
Authors: | Tudhope, A.W., Chilcott, C.P., McCulloch, M.T., Cook, E.R., Chappell, J., Ellam, R.M., Lea, D.W., Lough, J.M., and Shimmield, G.B. |
Subjects: | G Geography. Anthropology. Recreation > GB Physical geography |
College/School: | College of Science and Engineering > Scottish Universities Environmental Research Centre |
Journal Name: | Science |
Publisher: | American Association for the Advancement of Science |
ISSN: | 0036-8075 |
ISSN (Online): | 1095-9203 |
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