Kumiko Goto-Azuma

TL;DR: An undisturbed climate record from a North Greenland ice core, which extends back to 123,000 years before the present, within the last interglacial period, shows a slow decline in temperatures that marked the initiation of the last glacial period.

TL;DR: In this paper, a new common stratigraphic timescale for the North Greenland Ice Core Project (NGRIP) and GRIP ice cores is presented, which covers the period 7.9-14.8 kyr before present and includes the Bolling, Allerod, Younger Dryas, and early Holocene periods.

TL;DR: The results indicate that orbital-scale Antarctic climate change lags Northern Hemisphere insolation by a few millennia, and that the increases in Antarctic temperature and atmospheric carbon dioxide concentration during the last four terminations occurred within the rising phase of Northern Hemisphere summer insolation.

TL;DR: In this article, a compilation of nitrate data from Greenland has shown that recent NO3- concentrations reveal a temperature dependence similar to that seen in Antarctica, except for sites with very low accumulation rates, lower temperatures tend to lead to higher NO3 concentrations preserved in the ice.

TL;DR: This work provides a simple conceptual framework for understanding circum-Antarctic temperature variations forced by abrupt Northern Hemisphere climate change, and provides observational evidence of abrupt shifts in the Southern Hemisphere westerly winds.