Forward modeling of carbonate proxy data from planktonic foraminifera using oxygen isotope tracers in a global ocean model
Article first published online: 4 MAY 2010
Copyright 1999 by the American Geophysical Union.
Volume 14, Issue 4, pages 482–497, August 1999
How to Cite
1999), Forward modeling of carbonate proxy data from planktonic foraminifera using oxygen isotope tracers in a global ocean model, Paleoceanography, 14(4), 482–497, doi:10.1029/1999PA900025.(
- Issue published online: 4 MAY 2010
- Article first published online: 4 MAY 2010
- Manuscript Accepted: 26 APR 1999
- Manuscript Received: 13 OCT 1998
The distribution and variation of oxygen isotopes in seawater are calculated using the Goddard Institute for Space Studies global ocean model. Simple ecological models are used to estimate the planktonic foraminiferal abundance as a function of depth, column temperature, season, light intensity, and density stratification. These models are combined to forward model isotopic signals recorded in calcareous ocean sediment. The sensitivity of the results to the changes in foraminiferal ecology, secondary calcification, and dissolution are also examined. Simulated present-day isotopic values for ecology relevant for multiple species compare well with core-top data. Hindcasts of sea surface temperature and salinity are made from time series of the modeled carbonate isotope values as the model climate changes. Paleoclimatic inferences from these carbonate isotope records are strongly affected by erroneous assumptions concerning the covariations of temperature, salinity, and δ18Ow. Habitat-imposed biases are less important, although errors due to temperature-dependent abundances can be significant.