Search
Now showing items 1-10 of 58
Climate Change during and after the Roman Empire: Reconstructing the Past from Scientific and Historical Evidence
(MIT Press, 2012)
Growing scientific evidence from modern climate science is loaded with implications for the environmental history of the Roman Empire and its successor societies. The written and archaeological evidence, although richer ...
A Bayesian Algorithm for Reconstructing Climate Anomalies in Space and Time. Part 1: Development and Applications to Paleoclimate Reconstruction Problems
(American Meteorological Society, 2010)
Reconstructing the spatial pattern of a climate field through time from a dataset of overlapping instrumental and climate proxy time series is a nontrivial statistical problem. The need to transform the proxy observations ...
Compensation between Model Feedbacks and Curtailment of Climate Sensitivity
(American Meteorological Society, 2010)
The spread in climate sensitivity obtained from 12 general circulation model runs used in the Fourth Assessment of the Intergovernmental Panel on Climate Change indicates a 95% confidence interval of \(2.1^{\circ}-5.5^{\circ}C\), ...
A Bayesian Algorithm for Reconstructing Climate Anomalies in Space and Time. Part 2: Comparison with the Regularized Expectation-Maximization Algorithm
(American Meterological Union, 2010)
Part I presented a Bayesian algorithm for reconstructing climate anomalies in space and time (BARCAST). This method involves specifying simple parametric forms for the spatial covariance and temporal evolution of the climate ...
Total Matrix Intercomparison: A Method for Determining the Geometry of Water-Mass Pathways
(American Meteorological Society, 2010)
Ocean tracer distributions have long been used to decompose the deep ocean into constituent water masses, but previous inverse methods have generally been limited to just a few water masses that have been defined by a ...
Evolution of a Coupled Marine Ice Sheet–Sea Level Model
(American Geophysical Union, 2012)
We investigate the stability of marine ice sheets by coupling a gravitationally self-consistent sea level model valid for a self-gravitating, viscoelastically deforming Earth to a 1-D marine ice sheet-shelf model. The ...
Orbital Tuning, Eccentricity, and the Frequency Modulation of Climatic Precession
(American Geophysical Union, 2010)
The accuracy of geologic chronologies can, in principle, be improved through orbital tuning, the systematic adjustment of a chronology to bring the associated record into greater alignment with an orbitally derived signal. ...
The Mean Age of Ocean Waters Inferred from Radiocarbon Observations: Sensitivity to Surface Sources and Accounting for Mixing Histories
(American Meteorological Society, 2012)
A number of previous observational studies have found that the waters of the deep Pacific Ocean have an age, or elapsed time since contact with the surface, of 700–1000 yr. Numerical models suggest ages twice as old. Here, ...
Reconciling Discrepancies between Uk37 and Mg/Ca Reconstructions of Holocene Marine Temperature Variability
(Elsevier BV, 2013)
Significant discrepancies exist between the detrended variability of late-Holocene marine temperatures inferred from Mg/Ca and Uk37 proxies, with the former showing substantially more centennial-scale variation than the ...
Changes in Deep Pacific Temperature During the Mid-Pleistocene Transition and Quaternary
(Elsevier BV, 2010)
An attempt is made to unravel the dual influences of seawater temperature and isotopic composition upon the oxygen-isotope records of benthic foraminifers from the deep Pacific \((δ^{18}O_{b})\). Our approach is to estimate ...