But for the other half of the picture — what happened in the oceans during that time — there is only a relatively short record extending back about 20,000 years to the last glacial cycle. (sciencemag.org)
The timing of this decline correlates with environmental changes associated with the onset of the last glacial cycle, the team reports, whereas archaeological evidence does not support the presence of large populations of humans in eastern Beringia until more than 15,000 years later. (scientificamerican.com)
Building on this study, the team intend to produce a new reconstruction of global ice volume across the last glacial cycle, which will help to validate their proposition that certain boundaries can define windows of instability within the climate system. (sciencedaily.com)