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 …

Fossilized lipids preserved in sedimentary rocks offer singular insights into the Earth's
palaeobiology. These 'biomarkers' encode information pertaining to the oxygenation of the …

Palaeoclimate reconstructions of periods with warm climates and high atmospheric CO2
concentrations are crucial for developing better projections of future climate change. Deep …

Glycerol dialkyl glycerol tetraether (GDGT) lipids are membrane lipids which were long
thought to be synthesized mainly by archaea, organisms thought to be limited to extreme …

Several studies have shown that there is a strong relationship between the distribution of
crenarchaeotal isoprenoid glycerol dibiphytanyl glycerol tetraethers (GDGTs) and sea …

Molecular organic geochemical proxies are increasingly being utilized to reconstruct past
environmental conditions as new tools continue to be discovered and developed. To date …

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

The recent decline in Horn of Africa rainfall during the March–May “long rains” season has
fomented drought and famine, threatening food security in an already vulnerable region …

The early Eocene" equable climate problem", ie warm extratropical annual mean and above-
freezing winter temperatures evidenced by proxy records, has remained as one of the great …

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 …