Temporal relationships of carbon cycling and ocean circulation at glacial boundaries

LDEO Publication: 
Publication Type  Journal Article
Year of Publication  2005
Authors  Piotrowski, A. M.; Goldstein, S. L.; Hemming, S. R.; Fairbanks, R. G.
Journal Title  Science
Volume  307
Issue  5717
Pages  1933-1938
Journal Date  Mar 25
ISBN Number  0036-8075
Accession Number  ISI:000227957300049
LDEO Publication Number  6702
Key Words  atlantic deep-water; southern-ocean; north-atlantic; ice core; isotopic composition; labrador sea; nd; maximum; variability; neodymium

Evidence from high-sedimentation-rate South Atlantic deep-sea cores indicates that global and Southern Ocean carbon budget shifts preceded thermohaline circulation changes during the last ice age initiation and termination and that these were preceded by ice-sheet growth and retreat, respectively. No consistent lead-lag relationships are observed during abrupt millennial. warming events during the last ice age, allowing for the possibility that ocean circulation triggered some millenial climate changes. At the major glacial-intergiacial transitions, the global carbon budget and thermohaline ocean circulation responded sequentially to the climate changes that forced the growth and decline of continental ice sheets.


910UITimes Cited:23Cited References Count:47

URL  <Go to ISI>://000227957300049
DOI  DOI 10.1126/science.1104883