Paleoclimates

Climate boundary conditions composite graph.

Changes in climate boundary conditions since the Last Glacial Maximum 21,000 years ago
Click to enlarge. (20KB)

Global climate models are now being enlarged to earth-system models in which the vegetation and ocean models are coupled to the climate models.  These models are powerful tools for simulating past changes in climate, vegetation, and hydrological conditions.  The simulations show how the changing controls on climate from seasonal insolation, carbon dioxide concentrations, and ice sheet size may have affected regional and continental climate and environmental patterns. Large sets of pollen and lake-level data now exist for checking the results of these models, and Brown researchers have pioneered in interpreting and analyzing these data and using them to test the model simulations.  Several studies below illustrate some of the key results.


Coastal Studies     Geoarchaeology     Paleoclimates     Vegetation Dynamics