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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 ...
Integrated Summer Insolation Forcing and 40,000-Year Glacial Cycles: The Perspective from an Ice-Sheet/Energy-Balance Model
(American Geophysical Union, 2008)
Although the origins of the 40,000-year glacial cycles during the early Pleistocene are readily attributed to changes in Earth's obliquity (also having a 40,000-year period), the lack of ice-volume variability at precession ...
Tropical Cooling and the Onset of North American Glaciation
(Copernicus Publications, 2007)
We offer a test of the idea that gradual cooling in the eastern tropical Pacific led to cooling of North America and the initiation of glaciation ~3 Myr ago. Using modern climate data we estimate how warming of the eastern ...
Integrated Summer Insolation Forcing and 40,000-Year Glacial Cycles: The Perspective from an Ice-Sheet/Energy-Balance Model
(American Geophysical Union, 2008)
Although the origins of the 40,000-year glacial cycles during the early Pleistocene are readily attributed to changes in Earth's obliquity (also having a 40,000-year period), the lack of ice-volume variability at precession ...
Consequences of Pacing the Pleistocene 100 kyr Ice Ages by Nonlinear Phase Locking to Milankovitch Forcing
(American Geophysical Union, 2006)
The consequences of the hypothesis that Milankovitch forcing affects the phase (e.g., termination times) of the 100 kyr glacial cycles via a mechanism known as “nonlinear phase locking” are examined. Phase locking provides ...
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 ...