Results 31 to 40 of about 1,604 (171)

GDGT distributions from soil to cave: refining the speleothem paleothermometer [PDF]

, 2018
The GDGT paleothermometer has potential application as a speleothem paleoclimate proxy. However, the source of GDGTs found in speleothems is poorly understood, with multiple potential sources of GDGTs from the soil to the speleothem surface.
Baker, Andy ; https://orcid.org/, Khan, Stuart ; https://orcid.org/, Blyth, Alison, Woltering, M, McDonald, James ; https://orcid.org/   +4 more
core   +1 more source

Lack of ¹³C-label incorporation suggests low turnover rates of thaumarchaeal intact polar tetraether lipids in sediments from the Iceland shelf [PDF]

Biogeosciences, 2014
Thaumarchaeota are amongst the most abundant microorganisms in aquatic environments, however, their metabolism in marine sediments is still debated. Labeling studies in marine sediments have previously been undertaken, but focused on complex organic ...
S. K. Lengger, Y. A. Lipsewers, H. de Haas, J. S. Sinninghe Damsté, S. Schouten   +4 more
doaj   +1 more source

(Figure 6) Concentrations of Glc-branched-GDGT, GlcA-branched-GDGT, 2Gly-isoprenoid-GDNT, PME-DAG, PE-DEG, sum of archaeal IPLs, sum of bacterial IPLs, sum of total IPLs, core lipids of branched and isoprenoidal GDGTs in Bullenmoor peat bog

, 2010
(Figure 6) Concentrations of Glc-branched-GDGT, GlcA-branched-GDGT, 2Gly-isoprenoid-GDNT, PME-DAG, PE-DEG, sum of archaeal IPLs, sum of bacterial IPLs, sum of total IPLs, core lipids of branched and isoprenoidal GDGTs in Bullenmoor peat ...
Gerard J M Versteegh (7886111), Kai-Uwe Hinrichs (6960101), Aimee Gillespie (7963490), Versteegh, Gerard J M, Hinrichs, Kai-Uwe, Arne Leider (6969833), Xiao-Lei Liu (6974528), Leider, Arne, Gillespie, Aimee, Liu, Xiao-Lei, Gröger, Jens, Jens Gröger (7946405)   +11 more
core   +1 more source

Tetraether biomarker records from a loess-paleosol sequence in the western Chinese Loess Plateau

Frontiers in Microbiology, 2013
The ubiquitous occurrence of glycerol dialkyl glycerol tetraethers (GDGTs) in soils and their ability to record temperature and environmental changes offer the prospect of independently reconstructing continental paleotemperature and paleoenvironment ...
Guodong eJia, Zhiguo eRao, Jie eZhang, Zhiyang eLi, Fahu eChen   +4 more
doaj   +1 more source

Asynchronous Changes in Tempo‐Spatial Patterns of the Younger Dryas Hydroclimate in Northeastern China

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract The Younger Dryas (YD, 12,900–11,700 years before present) event offers a key opportunity to investigate climate system responses to abrupt perturbations, yet regional hydroclimate responses in northeastern China remain debated. Here we reconstruct the spatial fingerprint of YD hydroclimate variability using a comprehensive fossil pollen data ...
Sihan Sun, Yukun Zheng, Yue Wang, Jun Cheng, Yiyin Li, Hongyan Liu, Ulrike Herzschuh   +6 more
wiley   +1 more source

A diagnostic GDGT signature for the impact of hydrothermal activity on surface deposits at the Southwest Indian Ridge [PDF]

, 2016
The impact of hydrothermal activity on wider ocean geochemistry and microbial ecology remains a topic of much interest. To explore whether hydrothermal microbial signatures are exported to surrounding marine sediments or if such organisms serve as an ...
Anyang, Pan,, Fuwu, Ji,, Hu, Wang,, Qunhui, Yang,, Pancost, Rich, Huaiyang , Zhou,   +5 more
core   +1 more source

Impact of non-thermal variables on hydroxylated GDGT distributions around Iceland

Frontiers in Earth Science
Archaeal isoprenoid glycerol dibiphytanyl glycerol tetraethers (GDGTs) preserved in sediments are popular tools for the reconstruction of past temperature in the global ocean. Whereas the most common GDGTs have been well studied through environmental and
David J. Harning, Julio Sepúlveda, Julio Sepúlveda   +2 more
doaj   +1 more source

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

Paleoceanography 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, Francien Peterse, Thomas Laepple, Martin Ziegler, Appy Sluijs   +4 more
wiley   +1 more source

Archaeal Hydroxylated Isoprenoid GDGTs in Asian Lake Sediments: A New Tool for Terrestrial Paleotemperature Reconstructions

Geophysical Research Letters
Hydroxylated isoprenoid GDGTs (OH‐GDGTs) have emerged as a novel tool for reconstructing sea surface temperatures. However, when using marine OH‐GDGT calibration in lacustrine settings, it leads to a significant overestimation of temperatures ...
Jie Wu, Huan Yang, Caiming Shen, Liping Zhu, Yi Yang, Shucheng Xie   +5 more
doaj   +1 more source

New isoprenoid GDGT index as a water mass and temperature proxy in the Southern Ocean [PDF]

Climate of the Past
The Southern Ocean plays a crucial role in the global carbon cycle, ocean heat transport, and Antarctic ice dynamics. Investigating past variability in the Southern Ocean, including temperature and water mass distribution, can improve understanding of ...
H. Ishii, H. Ishii, H. Ishii, O. Seki, O. Seki, M. Yamamoto, B. Duncan, B. Duncan   +7 more
doaj   +1 more source