Carsten Rühlemann

TL;DR: This is the first set of consistently dated marine sediment cores enabling paleoclimate scientists to evaluate leads/lags between circulation and climate changes over vast regions of the Atlantic Ocean.

TL;DR: In this paper, a high-temporal-resolution record of sea surface temperatures from the western tropical North Atlantic Ocean which spans the past 29,000 years, derived from measurements of temperature-sensitive alkenone unsaturation in sedimentary organic matter.

TL;DR: In this article, a field-based calibration of surface seawater C37 unsaturation (UK′37) measurements is presented to estimate alkenone production temperature over the diversity of modern-day oceanic environments and alkenones-synthesizing populations.

TL;DR: In this article, the alkenone-derived sea-surface temperature (SST) records and a coupled atmosphere-ocean general circulation model (AOGCM) were used to investigate Holocene climate variability in the North Pacific and North Atlantic realms.

TL;DR: The authors showed that the increase in North Atlantic meridional overturning circulation between 4.8 and 4.0 million years ago, initiated by the progressive closure of the Central American Seaway, triggered overall shoaling of the tropical thermocline and preconditioned the turnaround from a warm eastern equatorial Pacific to the modern equatorial cold tongue state about 1 million years earlier than previously assumed.