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» Ancient Warm Climate Research at WHOI

» Karen Bice home page
Associate Scientist

» Camilo Ponton home page
MIT/WHOI Joint Program student

» Cretaceous Climate and Ocean Dynamics

This study involves the use of an isotope-capable general circulation model to quantify geographic, global climatic, and orbital effects on the oxygen isotopic composition of precipitation during warmer-than-modern climates. An extensive series of sensitivity tests is being performed using the GENESIS general circulation model (GCM) with water isotope tracers included in the hydrologic cycle (Mathieu et al., 2000). The experiments use boundary conditions appropriate for the modern, the early Paleogene and the Cretaceous intervals with the aim of examining variability in the isotopic composition of rainfall, continental runoff, and high latitude snowfall over a variety of boundary conditions and time scales.

Quantification of plausible ranges in precipitation oxygen isotopes for boundary conditions appropriate for warmer-than-modern climates allows greater confidence in estimates of paleotemperatures, water vapor transport, and seasonality from marine and continental proxy records that currently rely on assumptions of isotope-temperature relationships, oxygen isotope freshwater values, and freshwater flux estimates.

To view the results of work in progress, please use the links below and to the left.

Questions and comments are welcome. Email kbice@whoi.edu

This material is based upon work supported by the National Science Foundation under Grant No. 0442182.
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author and do not necessarily reflect the views of the National Science Foundation.

2006 Fall AGU Meeting contribution
Isotope modeling of a mid-Turonian warming event in the South Atlantic

Bice, K., Pollard, D., MacLeod, K., Huber, B. (2006) Isotope modeling of a mid-Turonian warming event in the South Atlantic, Eos Trans. AGU, 87 (52) Fall Meet. Suppl., Abstract PP23A-1739.

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2002 Cretaceous Climate and Ocean Dynamics Workshop presentation
What would a Cretaceous glaciation look like?

Bice, K., Pollard, D., Mathieu, R., Norris, R. (2002) What would a Cretaceous glaciation look like? Workshop on Cretaceous Climate and Ocean Dynamics, Florissant, Colorado, Abstract, [Online]. Available on the World Wide Web, http://cis.whoi.edu/science/GG/ccod/viewAbstracts.cfm?RefNumber=19725676.

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View all CCOD Workshop abstracts and reports.



 

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Last updated July 10, 2007
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