Results 71 to 80 of about 1,711 (160)

Archaeal and bacterial H-GDGTs are abundant in peat and their relative abundance is positively correlated with temperature [PDF]

, 2018
Glycerol monoalkyl glycerol tetraether lipids (GMGTs; also called ‘H-GDGTs’) differ from the more commonly studied glycerol dialkyl glycerol tetraether (GDGTs) in that they have an additional covalent bond that links the two alkyl chains.
?, ?, Inglis, G. N., Naafs, B. D.A., R.D. Pancost, D. McCormick, G.N. Inglis, McCormick, D., Pancost, R. D., B.D.A. Naafs   +8 more
core   +1 more source

Early to Mid‐Holocene Cool Temperature‐Induced Drought in Asian Interior

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract Hydroclimatic variations in mid‐latitude Asia during the early to mid‐Holocene and associated mechanisms remain disputed, hampering our understanding of atmospheric circulation controls on regional climatic changes. We report Holocene alkenone records from two Siberian lakes, documenting lake temperature and hydrological changes, and ...
Jiawei Jiang, Huanye Wang, Hu Liu, Guoqiang Chu, Weiguo Liu, Sergey Krivonogov, Zhonghui Liu   +6 more
wiley   +1 more source

Seasonal Changes in Marine Archaeal Tetraether Lipid Export Depth Linked to Net Primary Productivity

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Marine ammonia oxidizing archaea (AOA) produce isoprenoid glycerol dibiphytanyl glycerol tetraethers (GDGTs) which form the basis of seawater temperature proxy TEX86. Although most studies use TEX86 for sea surface temperature (SST) reconstructions, maximum GDGT production occurs at and below the nitracline. Moreover, sedimentary GDGT‐2/GDGT‐3
Addison Rice, Eunmi Park, Gesine Mollenhauer, Daisy Bouwmans, Anouk van Boxtel, Gert J. de Lange, Ryan Paul, Francesca Sangiorgi, Ryan Smulders, Jan‐Berend Stuut, Martin Ziegler, Appy Sluijs, Francien Peterse   +12 more
wiley   +1 more source

Evaluating the Reliability of Grain‐Size Sorting for Organic Biomarker Analysis

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Organic and inorganic geochemical proxies are fundamental for interpreting past climate variability. For inorganic analysis, marine sediments are often size fractionated to isolate foraminifera, while organic analysis employs subsamples of bulk sediment.
J. S. Hingley, P. S. Bray, T. Agterhuis, G. L. Foster, B. S. Wade, J. H. Whiteside, G. N. Inglis   +6 more
wiley   +1 more source

Branched GDGTs in Minnesota and Iowa lakes

, 2013
Branched glycerol dialkyl glycerol tetraethers (GDGTs) are bacterial membrane lipids, ubiquitously present in soils and peat bogs, as well as in rivers, lakes and lake sediments.
Downing, John A, Schouten, Stefan, Jack J Middelburg (6975785), Petra L Schoon (6958424), Middelburg, Jack J, Jaap S Sinninghe Damsté (6885257), Anna de Kluijver (6968822), John A Downing (8021654), de Kluijver, Anna, Schoon, Petra L, Stefan Schouten (6885260), Sinninghe Damsté, Jaap S   +11 more
core   +1 more source

Environmental Controls on Crenarchaeol Distributions in Hydrothermal Springs

Environmental Microbiology, Volume 28, Issue 2, February 2026.
The optimal pH and temperature for crenarchaeol (a unique archaeal lipid) production in hydrothermal springs are 7.4°C and 46°C, respectively, which has important implications for archaeal evolution. Our study also indicates that pH is the most important environmental variable for archaeal lipid membrane compositions.
Amanda N. Calhoun, Jerome Blewett, Daniel R. Colman, Maximiliano J. Amenabar, Carolynn M. Harris, Eric S. Boyd, Ann Pearson, William D. Leavitt   +7 more
wiley   +1 more source

Sea Surface Temperature and Salinity Changes in the Easternmost Mediterranean During the Pre‐Evaporitic Messinian Controlled by the Restriction at Gibraltar

Paleoceanography and Paleoclimatology, Volume 41, Issue 1, January 2026.
Abstract During the latest Miocene, the Mediterranean Basin was affected by extreme paleoceanographic and paleoenvironmental changes culminating with evaporite (gypsum and halite) formation during the Messinian Salinity Crisis (MSC: 5.97–5.33 Ma).
F. Lanterna, W. Krijgsman, L. Lourens, A. Mulch, I. Vasiliev   +4 more
wiley   +1 more source

Concentration and distribution of GDGTs in SPM from Lake Tanganyika

, 2012
We studied the distribution of glycerol dialkyl glycerol tetraethers (GDGTs) in suspended particulate matter from the water column of Lake Tanganyika (East Africa), where sediment studies had shown the applicability of the TEX86 proxy for reconstructing ...
Durisch-Kaiser, Edith, Schouten, Stefan, Rijpstra, W Irene C, W Irene C Rijpstra (7910555), Edith Durisch-Kaiser (8021138), Jaap S Sinninghe Damsté (6885257), Schubert, Carsten J, Stefan Schouten (6885260), Carsten J Schubert (6959411), Sinninghe Damsté, Jaap S   +9 more
core   +1 more source

Disentangling influences of climate variability and lake-system evolution on climate proxies derived from isoprenoid and branched glycerol dialkyl glycerol tetraethers (GDGTs): the 250 kyr Lake Chala record [PDF]

Biogeosciences
High-resolution paleoclimate records from tropical continental settings are greatly needed to advance understanding of global climate dynamics. The International Continental Scientific Drilling Program (ICDP) project DeepCHALLA recovered a 214.8 m long ...
A. J. Baxter, F. Peterse, D. Verschuren, A. Maitituerdi, N. Waldmann, J. S. Sinninghe Damsté, J. S. Sinninghe Damsté   +6 more
doaj   +1 more source

Soil and Air Temperature Calibrations Using Branched GDGTs for the Tropical Andes of Colombia: Toward a Pan‐Tropical Calibration

Geochemistry, Geophysics, Geosystems, 2020
Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are bacterial cell membrane lipids that, when preserved in sedimentary archives, can be used to infer continental paleotemperatures.
Lina C. Pérez‐Angel, Julio Sepúlveda, Peter Molnar, Camilo Montes, Balaji Rajagopalan, Kathryn Snell, Catalina Gonzalez‐Arango, Nadia Dildar   +7 more
doaj   +1 more source