Four climate cycles of recurring deep and surface water destabilizations on the Iberian margin
Martrat, B.; Grimalt, J.O.; Shackleton, N.J.; de Abreu, L.; Hutterli, M.A.; Stocker, T.F. (2007). Four climate cycles of recurring deep and surface water destabilizations on the Iberian margin. Science (Wash.) 317(5837): 502-507. https://dx.doi.org/10.1126/science.1139994
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075; e-ISSN 1095-9203, more
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| Authors | | Top |
- Martrat, B.
- Grimalt, J.O.
- Shackleton, N.J.
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- de Abreu, L.
- Hutterli, M.A.
- Stocker, T.F.
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| Abstract |
Centennial climate variability over the last ice age exhibits clear bipolar behavior. High-resolution analyses of marine sediment cores from the Iberian Margin trace a number of associated changes simultaneously. Proxies of sea surface temperature and water mass distribution, as well as relative biomarker content, demonstrate that this typical north-south coupling was pervasive for the cold phases of climate during the past 420,000 years. Cold episodes after relatively warm and largely ice-free periods occurred when the predominance of deep water formation changed from northern to southern sources. These results reinforce the connection between rapid climate changes at Mediterranean latitudes and century-to-millennial variability in northern and southern polar regions. |
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