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The onset of the ice age era at ~2.75 Ma BP and its increasing intensity from ~1 Ma BP onwards cannot be explained by variations of the Earth's orbit. Evidence supporting a 2.4 million km 2 ice sheet on the Tibetan plateau during the Last Glacial Maximum has led to the hypothesis that the resulting albedo-induced heat loss in the Earth's atmosphere may have triggered global ice ages. Recent data obtained from marine and terrestrial sediment records now confirm the climatic- ecological impact of a Tibetan glaciation; they also show that the development of Tibet's ice sheet was synchronous with the onset and intensification of global ice ages.

climate research

A relief-specific model of the ice age on the basis of uplift-controlled glacier areas in Tibet and the corresponding albedo increase as well as their positive climatological feedback by means of the global radiation geometry