Results 21 to 30 of about 1,604 (171)

Distribution of Glycerol Dialkyl Glycerol Tetraethers (GDGTs) in Microbial Mats From Holocene and Miocene Sabkha Sediments

Frontiers in Earth Science, 2019
Sabkhas are important settings for understanding early earth biological environments, and the algal mats associated with them are thought to be potential source rocks for hydrocarbon production.
Benjamin Petrick, Lars Reuning, Lars Reuning, Alfredo Martínez-García   +3 more
doaj   +1 more source

Reviews and syntheses: Best practices for the application of marine GDGTs as proxy for paleotemperatures: sampling, processing, analyses, interpretation, and archiving protocols [PDF]

Biogeosciences
Marine glycerol dialkyl glycerol tetraethers (GDGTs) are used in various proxies (such as TEX86) to reconstruct past ocean temperatures. Over 20 years of improvements in GDGT sample processing, analytical techniques, data interpretation and our ...
P. K. Bijl, K. K. Śliwińska, B. Duncan, A. Huguet, S. Naeher, S. Naeher, R. Rattanasriampaipong, R. Rattanasriampaipong, C. Sosa-Montes de Oca, A. Auderset, M. A. Berke, B. S. Kim, N. Davtian, T. Dunkley Jones, D. D. Eefting, F. J. Elling, P. Fenies, G. N. Inglis, L. O'Connor, R. D. Pancost, F. Peterse, A. Rice, A. Sluijs, D. Varma, W. Xiao, Y. G. Zhang   +25 more
doaj   +1 more source

Development of a regional glycerol dialkyl glycerol tetraether (GDGT)–temperature calibration for Antarctic and sub-Antarctic lakes [PDF]

, 2016
A regional network of quantitative reconstructions of past climate variability is required to test climate models. In recent studies, temperature calibration models based on the relative abundances of sedimentary glycerol dialkyl glycerol tetraethers ...
Saunders, Krystyna M., Juggins, Steve, Verleyen, Elie, Roberts, Stephen J., Pearson, Emma J., Hodgson, Dominic A., Foster, Louise C., Saunders, Krystyna   +7 more
core   +3 more sources

Distribution and source of glycerol dialkyl glycerol tetraethers (GDGTs) and the applicability of GDGT-based temperature proxies in surface sediments of Prydz Bay, East Antarctica

Polar Research, 2020
Reliable records of Southern Ocean seawater palaeotemperatures are important because this region plays a significant role in regulating global climate change.
Ruijuan Liu, Zhengbing Han, Jun Zhao, Haifeng Zhang, Dong Li, Jianye Ren, Jianming Pan, Haisheng Zhang   +7 more
doaj   +1 more source

Maastrichtian–Rupelian paleoclimates in the southwest Pacific – a critical re-evaluation of biomarker paleothermometry and dinoflagellate cyst paleoecology at Ocean Drilling Program Site 1172 [PDF]

Climate of the Past, 2021
Sea surface temperature (SST) reconstructions based on isoprenoid glycerol dialkyl glycerol tetraether (isoGDGT) distributions from the Eocene southwest (SW) Pacific Ocean are unequivocally warmer than can be reconciled with state-of-the-art fully ...
P. K. Bijl, J. Frieling, J. Frieling, M. J. Cramwinckel, M. J. Cramwinckel, C. Boschman, A. Sluijs, F. Peterse   +7 more
doaj   +1 more source

Carbon isotopic composition of branched tetraether membrane lipids in soils suggest a rapid turnover and a heterotrophic life style of their source organism(s) [PDF]

Biogeosciences, 2010
Branched Glycerol Dialkyl Glycerol Tetraethers (GDGTs) are membrane spanning lipids synthesised by as yet unknown bacteria that thrive in soils and peat.
J. W. H. Weijers, G. L. B. Wiesenberg, R. Bol, E. C. Hopmans, R. D. Pancost   +4 more
doaj   +1 more source

Archaeal Sources of Intact Membrane Lipid Biomarkers in the Oxygen Deficient Zone of the Eastern Tropical South Pacific

Frontiers in Microbiology, 2019
Archaea are ubiquitous in the modern ocean where they are involved in the carbon and nitrogen biogeochemical cycles. However, the majority of Archaea remain uncultured.
Martina Sollai, Laura Villanueva, Ellen C. Hopmans, Richard G. Keil, Jaap S. Sinninghe Damsté, Jaap S. Sinninghe Damsté   +5 more
doaj   +1 more source

(Table 1) Ratio of hydroxy-GDGT vs. the total core GDGT was calculated based on the detection of hydroxy-GDGT

, 2012
Hydroxylated glycerol dialkyl glycerol tetraethers (hydroxy-GDGTs) were detected in marine sediments of diverse depositional regimes and ages. Mass spectrometric evidence, complemented by information gleaned from two-dimensional (2D) 1H–13C nuclear ...
Simpson, Jeffrey H, Kai-Uwe Hinrichs (6960101), Lin, Yu-Shih, Yu-Shih Lin (6960773), Summons, Roger E, Hinrichs, Kai-Uwe, Lipp, Julius S, Xiao-Lei Liu (6974528), Jeffrey H Simpson (7980416), Julius S Lipp (6977507), Roger E Summons (7383896), Liu, Xiao-Lei   +11 more
core   +1 more source

(Appendix 3) GDGT concentrations per IPL fraction

, 2017
(Appendix 3) GDGT concentrations per IPL ...
Sabine K Lengger (8006516), Schouten, Stefan, Ellen C Hopmans (6975590), Lengger, Sabine K, Jaap S Sinninghe Damsté (6885257), Hopmans, Ellen C, Stefan Schouten (6885260), Sinninghe Damsté, Jaap S   +7 more
core   +1 more source

Distribution of tetraether lipids in agricultural soils – differentiation between paddy and upland management [PDF]

Biogeosciences, 2016
Rice paddies constitute almost a fifth of global cropland and provide more than half of the world's population with staple food. At the same time, they are a major source of methane and therewith significantly contribute to the current warming of Earth's
C. Mueller-Niggemann, S. R. Utami, A. Marxen, K. Mangelsdorf, T. Bauersachs, L. Schwark   +5 more
doaj   +1 more source