TY - JOUR
AU - Belen Martrat
AU - Joan Grimalt
AU - Nicholas Shackleton
AU - Lucia de Abreu
AU - Manuel Hutterli
AU - Thomas Stocker
AB - 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.
BT - Science
DA - July 27, 2007
M1 - 5837
N2 - 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.
PY - 2007
SP - 502
EP - 507
T2 - Science
TI - Four Climate Cycles of Recurring Deep and Surface Water Destabilizations on the Iberian Margin
UR - http://www.sciencemag.org/content/317/5837/502.abstract
VL - 317
ER -