Jeffrey P. Severinghaus

TL;DR: In this article, the authors used 60 m deep test holes in the Algodones Dunes, Imperial Valley, California, to evaluate the feasibility of using sand dunes as archives of old air, showing that advection in this dune is negligible compared to diffusion as a transport mechanism.

TL;DR: In this article, the authors investigate Greenland temperature evolution during the last deglaciation using independent reconstructions from three ice cores and simulations with a coupled ocean-atmosphere climate model.

TL;DR: In this article, the authors present the first results from a new method of dissolved gas sampling, extraction and analysis that permits measurement of stable Ar, Kr, and Xe isotope ratios at or below ∼5 per meg amu−1 precision (1σ), two orders ofmagnitude below conventional Kr and XE isotope measurements, which is achieved by quantitative extraction and subsequent purification of 2-L water samples via helium sparging and viscous dual-inlet isotope ratio mass spectrometry.

TL;DR: In this article, the authors reconstruct the mean ocean temperature from 74 to 59.7°C, covering the Marine Isotope Stage (MIS) 5a−4°C boundary, MIS 4, and part of the MIS 4−3 transition.