@article{338,
  author = {Belen Martrat and Joan Grimalt and Nicholas Shackleton and Lucia de Abreu and Manuel Hutterli and Thomas Stocker},
  title = {Four Climate Cycles of Recurring Deep and Surface Water Destabilizations on the Iberian Margin},
  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.},
  year = {2007},
  journal = {Science},
  volume = {317},
  number = {5837},
  pages = {502-507},
  month = {July 27, 2007},
  url = {http://www.sciencemag.org/content/317/5837/502.abstract},
}