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Subtropical Arctic Ocean temperatures during the Palaeocene/Eocene thermal maximum
It is shown that sea surface temperatures near the North Pole increased from ∼18 °C to over 23‬°C during this event, which suggests that higher-than-modern greenhouse gas concentrations must have operated in conjunction with other feedback mechanisms—perhaps polar stratospheric clouds or hurricane-induced ocean mixing—to amplify early Palaeogene polar temperatures. Expand
Tetraether membrane lipid distributions in water-column particulate matter and sediments: a study of 47 European lakes along a north–south transect
We studied the distribution of glycerol dialkyl glycerol tetraethers (GDGTs) in water-column particulate matter and the top 5 cm of sediment from 47 lakes along a transect from southern Italy to theExpand
Early Palaeogene temperature evolution of the southwest Pacific Ocean
This work presents a uniquely continuous and chronostratigraphically well-calibrated TEX86 record of sea surface temperature (SST) from an ocean sediment core in the East Tasman Plateau, and shows that southwest Pacific SSTs rose above present-day tropical values and had gradually decreased to about 21 °C by the early Late Eocene age. Expand
Niche segregation of ammonia-oxidizing archaea and anammox bacteria in the Arabian Sea oxygen minimum zone
A unique depth distribution of abundant AOA and anammox bacteria and the segregation of their respective niches by >400 m is revealed, suggesting no direct coupling of their metabolisms at the time and site of sampling in the Arabian Sea OMZ. Expand
Transient Middle Eocene Atmospheric CO2 and Temperature Variations
It appears that vast amounts of CO2 were injected into the atmosphere, and a sea surface temperature increase of as much a 6°C accompanied the atmospheric CO2 rise, suggesting that elevated pCO2 played a major role in global warming during the MECO. Expand
Dust from the dark region in the western ablation zone of the Greenland ice sheet
Abstract. A dark region tens of kilometres wide is located in the western ablation zone of the Greenland ice sheet. The dark appearance is caused by higher amounts of dust relative to the brighterExpand
Environmental precursors to rapid light carbon injection at the Palaeocene/Eocene boundary
The lag of ∼3,000 years between the onset of warming in New Jersey shelf waters and the carbon isotope excursion is consistent with the hypothesis that bottom water warming caused the injection of 13C-depleted carbon by triggering the dissociation of submarine methane hydrates, but the cause of the early warming remains uncertain. Expand
Bromine counts from XRF scanning as an estimate of the marine organic carbon content of sediment cores
[1] XRF sediment core scanning technology is increasingly used to quantify sediment composition. The overall good correlation between biophilic halogen bromine (Br) and sedimentary total organicExpand
Temporal variability in the northern Arabian Sea oxygen minimum zone (OMZ) during the last 225,000 years
The northern Arabian Sea is one of the few regions in the open ocean where thermocline water is severely depleted in oxygen. The intensity of this oxygen minimum zone (OMZ) has been reconstructedExpand
Eustatic variations during the Paleocene‐Eocene greenhouse world
We reconstruct eustatic variations during the latest Paleocene and earliest Eocene (∼58-52 Ma). Dinoflagellate cysts, grain size fractions, and organic biomarkers in marine sections at four sitesExpand