A low-order dynamical model of global climatic variability over the full Pleistocene

Journal Article · Tue Feb 20 04:00:00 EST 1990 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JD095iD02p01955· OSTI ID:5009022

Maasch, K A; Saltzman, B ^[1]

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1. Yale Univ., New Haven, CT (United States)

A previously formulated dynamical model of the late Pleistocene ice ages (based on the hypothesis that the global CO{sub 2} system can provide the instability to drive a natural oscillation involving feedbacks between the cryosphere, atmosphere, and ocean) is extended to include (1) additive earth orbital forcing (summer insolation changes at 65{degree}N) and (2) tectonic forcing in the form of a postulated variation in the multiplicative parameters (rate constants) of the model system. The structural (e.g., bifurcation) properties of the model are examined in detail to reveal the regions of parameter space wherein the geologically inferred features of the full Pleistocene can be simulated, including the observed chronology, the phase relationships between ice, CO{sub 2}, and North Atlantic Deep Water formation, and the mid-Pleistocene transition.

• OSTI ID: 5009022
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 95:D2; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110
58 GEOSCIENCES
580000* -- Geosciences
ATLANTIC OCEAN
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CENOZOIC ERA
CHALCOGENIDES
CLIMATIC CHANGE
EQUATIONS
GEOLOGIC AGES
GLACIERS
ICE
INSOLATION
MATHEMATICAL MODELS
OSCILLATIONS
OXIDES
OXYGEN COMPOUNDS
PALEOCLIMATOLOGY
PALEONTOLOGY
PLEISTOCENE EPOCH
QUATERNARY PERIOD
SEAS
SIMULATION
SURFACE WATERS
TECTONICS