glaciations

I'll add that most prior glaciations and interstadials have been linked to known causes -- orbital mechanics (Milamkovic cycles), continental drift, and major biotic events (terrestrial vegetation did alot to reduce the amount of atmospheric CO2 one darned long time ago).

Global Warming... 2009

I'll add that most prior glaciations and interstadials have been linked to known causes -- orbital mechanics (Milamkovic cycles), continental drift, and major biotic events (terrestrial vegetation did alot to reduce the amount of atmospheric CO2 one darned long time ago).

Global Warming... 2009

They clearly show the floors to the many different seas and its life forms, to tens of millions of years of mountain building and millions of years of wind and water erosion, glaciations and, finally, deglaciation.

Dr. Reese Halter: Protecting Our Wild Prairies Dr. Reese Halter 2010

Overall, endemism is quite high in this hotspot because of extensive speciation among several groups of plants, most notably the epiphytes, suggesting that the region was the location of plant refugia during Pleistocene glaciations.

Biological diversity in Tumbes-Chocó-Magdalena 2008

By the late Precambrian, about 600-800 million years ago, glaciations had returned in a big way.

Who Do You Say I Am 2010

In so doing they drew down the CO2, which eventually triggered glaciations that then grew through a positive feedback of their own.

Who Do You Say I Am 2010

A now trendy model for their occurrence is "icehouse/greenhouse" oscillations, in which heavy-duty global glaciations oscillated with globally warm conditions (see Hoffman et al, 1998.)

Who Do You Say I Am 2010

In addition, historical differences in their development during recent geological time and geomorphic processes that have affected different regions (e.g., extent of Pleistocene glaciations, age, and connectivity to southern areas), will contribute to regional, subregional, and local variability in ecosystem structure and function.

Freshwater ecosystems in the Arctic 2009

Recent glaciations have resulted in major losses of the resident arctic fauna and recolonization has been slow (particularly in the terrestrial and freshwater environments), owing to both the extreme environmental conditions and the low overall productivity of arctic ecosystems.

Conservation of arctic ecosystems and species 2009

The errors and uncertainties tend to be amplified farther back in the paleoclimatic record, particularly in the Arctic, where much of the paleoclimatic evidence from earlier parts of the Quaternary Period has been removed or obfuscated as a result of later glaciations.

Arctic climate variability prior to 100 years BP 2009