NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Modelling the Phanerozoic carbon cycle and climate - Constraints from the Sr-87/Sr-86 isotopic ratio of seawaterA numerical model is developed for simulating the long-term changes of atmospheric CO2 and climate during the Phanerozoic. The model describes the coupled evolution of the biogeochemical cycles of C, S, Ca, Mg, P, and Sr, with the emphasis on the effect of coupling the cycles of carbon and strontium and on interpreting the observed seawater Sr-87/Sr-86 ratios. The abilities of continental weathering, volcanism, and surface lithology in generating that signal are tested and compared. The results obtained are used to reconstruct a history of atmospheric CO2 and climate during Phanerozoic time, consistent with the strontium isotopic data. It is shown that the predicted history is compatible with paleoclimatic indicators, such as the timing of glaciation and the estimates of Cretaceous paleotemperatures.
Document ID
19930068202
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Francois, Louis M.
(NASA Headquarters Washington, DC United States)
Walker, James C. G.
(Michigan Univ. Ann Arbor, United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1992
Publication Information
Publication: American Journal of Science
ISSN: 0002-9599
Subject Category
Geosciences (General)
Accession Number
93A52199
Funding Number(s)
CONTRACT_GRANT: NAGW-176
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available