It is well established that greenhouse conditions prevailed during the Cretaceous Period (~
145–66 Ma). Determining the exact nature of the greenhouse-gas forcing, climatic warming …

Abstract The Eocene–Oligocene transition (EOT) was a climate shift from a largely ice-free
greenhouse world to an icehouse climate, involving the first major glaciation of Antarctica …

The development of methods using liquid chromatography coupled to mass spectrometry to
analyze glycerol dialkyl glycerol tetraethers (GDGTs) has substantially expanded the …

Glycerol dibiphytanyl glycerol tetraethers (GDGTs) are archaeal monolayer membrane lipids
that can provide a competitive advantage in extreme environments. Here, we identify a …

Archaeal membrane lipids are widely used for paleotemperature reconstructions, yet these
molecular fossils also bear rich information about ecology and evolution of marine ammonia …

TEX 86 is an important proxy for constraining ocean temperatures in the Earth's past.
Current calibrations, however, feature structured residuals indicative of a spatially-varying …

Abstract The Late Cretaceous 'greenhouse'world witnessed a transition from one of the
warmest climates of the past 140 million years to cooler conditions, yet still without …

The last glacial cycle provides the opportunity to investigate large changes in the Atlantic
Meridional Overturning Circulation (AMOC) beyond the small fluctuations evidenced from …

Molecular fossils (biomarkers) are abundant in organic rich natural archives such as peats
and lignites (fossilized peat), where their distribution is governed by their biological source …

Global ocean temperatures rapidly warmed by~ 5° C during the Paleocene-Eocene Thermal
Maximum (PETM;~ 56 million years ago). Extratropical sea surface temperatures (SSTs) met …