Dating ice age sediment deposits

Depositional ages based on quartz OSL and feldspar p IRIR225 signals revealed deposition of ice marginal kame terraces and glaciofluvial foreland terraces during late to middle MIS 6.

In combination with results from previous studies, we could reconstruct the valley evolution during the Riss glaciation.

Full glacial conditions came into being without falling CO2 providing any of the climate forcing.Methane on the other hand lags temperature by about 2,000 years at the termination but follows temperature down exactly at the inception.It therefore follows that methane and CO2 are not coupled.Each responds in their own time to changing climate.The absence of coupling may be explained by the different bio-geochemical pathways these gasses have in the biosphere – ocean – atmosphere system.

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