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Atmospheric Carbon Dioxide, Orbital Forcing, and Climate
Abstract
We have analyzed a 340,000-year record of benthic and planktonic oxygen and carbon isotope measurements from an equatorial Pacific deep-sea core. The data provide estimates of both global ice volume and atmospheric carbon dioxide concentration over this period. The frequencies characteristic of changes in the earth-sun orbital geometry dominate all the records. Examination of phase relationships shows that atmospheric carbon dioxide concentration leads ice volume over the orbital bandwidth, and is forced by orbital changes through a mechanism, at present not fully understood, with a short response time. Changes in atmospheric CO2 are not primarily caused by glacial-interglacial sea level changes, which had been hypothesized to affect atmospheric CO2 through the effect on ocean chemistry of changing sedimentation on the continental shelves. Instead, variations in atmospheric CO2 should be regarded as part of the forcing of ice volume changes.
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Citations
Cited by
Oxygen isotopes, ice volume and sea level
Shackleton, N. J. (1987) · Quaternary Science Reviews · doi:10.1016/0277-3791(87)90003-5 · Cited by 1,456
Self-citationRomanek, C. S., Grossman, E. L., & Morse, J. W. (1992) · Geochimica et Cosmochimica Acta · doi:10.1016/0016-7037(92)90142-6 · Cited by 1,215
Ding, Z. L., Derbyshire, E., Yang, S. L., Yu, Z. W., Xiong, S. F., & Liu, T. S. (2002) · Paleoceanography · doi:10.1029/2001pa000725 · Cited by 579
Erez, J. (2003) · Reviews in Mineralogy and Geochemistry · doi:10.2113/0540115 · Cited by 555
Matuyama 41,000-year cycles: North Atlantic Ocean and northern hemisphere ice sheets
Ruddiman, W. F., Raymo, M., & McIntyre, A. (1986) · Earth and Planetary Science Letters · doi:10.1016/0012-821x(86)90024-5 · Cited by 514
Metadata
- Authors
- Shackleton, N. J., & Pisias, N. G.
- Venue
- Geophysical Monograph Series
- Publisher
- American Geophysical Union
- Published
- 2013-03-18
- Pages
- 303-317
- ISSN
- 0065-8448 (ISSN-L)
- 2328-8779
- OpenAlex
- W1485073635
- Cited by
- 331
- References
- 0
- FWCI
- 6.96
- Type
- book chapter
- Language
- en
- Open access
- closed
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