Results 61 to 70 of about 3,343 (212)

LIPOTHERM: A Calibration Framework for GDGT Paleothermometry Based on Machine Learning

open access: yesGeochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract SST reconstruction from glycerol dialkyl glycerol tetraethers (GDGT) preserved in marine sediments is an important tool in quantitative paleoclimatology. These reconstructions require calibration frameworks that provide mapping between sediment GDGT data and temperature values.
Vikash Kumar   +2 more
wiley   +1 more source

AllIGATR: A Multi‐Dimensional Approach for Marine Archaeal Lipid‐Based Paleothermometry

open access: yesPaleoceanography and Paleoclimatology, Volume 41, Issue 10, October 2026.
Abstract Archaeal glycerol dibiphytanyl glycerol tetraether membrane lipids (GDGTs) are ubiquitous in marine sediments. The number of ring structures in six specific GDGTs varies with seawater temperature, leading to their use in paleothermometry. GDGT temperature dependence is typically quantified in TEX86.
Addison Rice   +4 more
wiley   +1 more source

A Shallow‐Marine Ecosystem Before Initial Tibetan Plateau Uplift

open access: yesGeophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract The uplift of the Tibetan Plateau profoundly influences global atmospheric circulation, sediment transport, and biodiversity, but its pre‐uplift marine paleoenvironment remains poorly understood. Here we report the first discovery of an in situ benthic fossil assemblage from the Puga area in central Tibet, which was deposited on a shallow ...
Ming Wang   +12 more
wiley   +1 more source

Reconstructing Devonian Paleotemperature Using the Stable Oxygen Isotope Composition of Bulk Carbonate Rocks

open access: yes, 2021
Past climates present an opportunity to observe how temperature interacts with other Earth systems. To make these connections, a well-resolved paleotemperature record during past periods of global change is needed. Oxygen isotope paleothermometry records
Laub, Olivia
core   +1 more source

18O Fractionation in the coralline aragonite of Porites lobata: Implications in oceanic paleothermometry studies

open access: yesCiencias Marinas, 1994
This study is fundamentally focused on a simple, but relatively unpondered problem: the coral δ18O temperature sensitivity (dδ/dT). Previous paleotemperature studies of corals have involved the use of either: 1) the calcite’s δ18O temperature ...
JD Carriquiry
doaj   +1 more source

Magnesium in subaqueous speleothems as a potential palaeotemperature proxy

open access: yesNature Communications, 2020
Few palaeoclimate archives beyond the polar regions preserve continuous and datable paleotemperature proxy time series over multiple glacial-interglacial cycles.
Russell Drysdale   +14 more
doaj   +1 more source

Ecological and Hydrological Modulation of Land Surface Temperature in the East Asian Monsoon Margin During Pliocene‐Pleistocene Global Cooling

open access: yesGeophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract The response of terrestrial climate to future warming remains debated. The Pliocene, with CO2 levels similar to today, is an important analog for the future. The East Asian monsoon marginal region is one of the most climate sensitive regions on Earth. Based on contemporaneous aeolian sediments and aquatic‐influenced alluvial sediments from the
Chen Chen   +5 more
wiley   +1 more source

(Table 4 and 5) Oxygen and carbon isotopes from Inoceramus and paleotemperature at DSDP Hole 75-530A

open access: yes, 1984
(Table 4 and 5) Oxygen and carbon isotopes from Inoceramus and paleotemperature at DSDP Hole 75 ...
Barron, E J   +5 more
core   +1 more source

Reconstructing Northeastern United States temperatures using Atlantic white cedar tree rings

open access: yesEnvironmental Research Letters, 2017
Our knowledge of climate variability in the densely populated Northeastern United States is limited to instrumental data of the last century. Most regional paleoclimate proxies reflect a mix of climate responses, which makes reconstructing historical ...
Jessie K Pearl   +3 more
doaj   +1 more source

Boron Isotope Evidence for Reduced Ventilation of the Deep Arctic Ocean During the Last Glacial Period

open access: yesPaleoceanography and Paleoclimatology, Volume 41, Issue 9, September 2026.
Abstract Understanding the ventilation of the deep ocean, where most ocean carbon is stored, is essential to understanding how changes to ocean carbon budgets contribute to climate change. In the Arctic Ocean, shifts in ice cover, stratification and temperature are likely to impact carbon sequestration in the ocean interior.
Jesse R. Farmer   +3 more
wiley   +1 more source

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