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Alkenones are long-chain unsaturated methyl and ethyl n-ketones produced by a few phytoplankton species of the class Prymnesiophyceae. Alkenones typically...

isotopic composition of alkenones often reflect the isotopic enrichment or depletion of the surrounding environment, and δDs of alkenones in different regions...

last 16,000 years from records of planktonic stable oxygen isotopes and alkenone unsaturation ratios". Palaeogeography, Palaeoclimatology, Palaeoecology...

compounds, known as alkenones, can be found in marine sediments long after other soft parts of the organisms have decomposed. Alkenones are most commonly...

considerations (especially δ18O); the Mg/Ca ratio of foram tests, and alkenones, are also useful. Often, many are used in conjunction to get a multi-proxy...

bankruptcy in 2015. By 2015, cultivation of fatty acid methyl esters and alkenones from the algae, Isochrysis, was under research. By 2016, Thomas Brueck...

Several geochemical proxy tools include long-chain organic molecules (e.g. alkenones), stable and radioactive isotopes, and trace metals. Additionally, sediment...

temperatures from the presence or absence of certain lipids and long chain alkenones, as these molecules are very sensitive to temperature. This analysis provides...

articles on Historic and Prehistoric climate indicators of all types. To Add: Alkenone analysis TEX-86 analysis Nile river flood levels Trace mineral ratios in...

co-producing alkenones, alkenone derivatives, and co-products". Retrieved 15 January 2025 – via Google Patents. "Use of marine algae for co-producing alkenones, alkenone...

characteristic of certain climatic zones. Biomarker molecules such as the alkenones may yield information about their temperature of formation. Chemical signatures...

surface temperatures. This included studying whether the 14C ages of alkenones could be used to estimate paleotemperature, as lateral transport can cause...

into the icehouse climate. Multiple proxies, such as oxygen isotopes and alkenones, indicate that at the Eocene–Oligocene transition, the atmospheric carbon...

of organic carbon to the seafloor over time, and used the presence of alkenones in particles to track changes in ocean temperatures over time. Through...

the summer thermocline. and for its production of molecules known as alkenones that are commonly used by earth scientists as a means to estimate past...

citric acid cycle, which is of great importance in bioenergy. An enone (or alkenone) is an organic compound containing both alkene and ketone functional groups...

the middle of the Mesozoic Era. An analysis of CO2 reconstructions from alkenone records shows that CO2 in the atmosphere declined before and during Antarctic...

Pacific Ocean. Climate models, sea surface temperatures reconstructed with alkenones and sometimes even reconstructions from foraminifera in the same drill...

"Enhanced climate variability during the last millennium recorded in alkenone sea surface temperatures of the northwest Pacific margin". Global and Planetary...

research, amongst other sedimentological studies, geochemical studies, with alkenones, Mg/Ca, and micropaleontological, with foraminifera, pollen and spores...

estimates off the West African coast through biochemical indicators known as alkenones (Sachs 2005) Warming of the subsurface ocean in the subpolar North Atlantic...

environmental changes over the last 600 years. These reconstructions are based on alkenones, Membrane lipids and stable isotope ratios of globigerinoides ruber. It...

for jet biofuels. By 2015, cultivation of fatty acid methyl esters and alkenones from the algae, Isochrysis, was under research as a possible jet biofuel...

diagenetically altered (e.g. planktonic foraminifera) or absent (e.g. alkenones). TEX86 has been extensively used to reconstruct Eocene (55-34Ma) SST...

University of Washington 2015 The Greenhouse Emiliania huxleyi Coccolithophore Alkenone production, Algal blooms 167.7 Mb 38,554 Joint Genome Institute 2013 The...

of the Horn of Africa. They took cores of marine sediment, testing for alkenones, and concluded that about 70,000 years ago this region experienced a change...

providing simple syntheses of conjugated (E,E)-dienes and conjugated (E)-alkenones", Tetrahedron Lett., 32 (30): 3655–3658, doi:10.1016/s0040-4039(00)79758-9...

radiocarbon-based assessment of the preservation characteristics of crenarchaeol and alkenones from continental margin sediments" (PDF). Organic Geochemistry. Advances...

Linda; Li, Gaoyuan; Yao, Yuan; Huang, Yongsong (1 December 2019). "Group I alkenones and Isochrysidales in the world's largest maar lakes and their potential...

with palaeoglacier presented. As for ocean sediments, the variations of alkenone levels and faunal abundances were measured to model paleotemperatures in...

Volkman, John K. (2006). "RE-EXAMINATION OF THE DOUBLE BOND POSITIONS IN ALKENONES AND DERIVATIVES: BIOSYNTHETIC IMPLICATIONS". Journal of Phycology. 42...

surface circulation in the East Equatorial South-Atlantic - Evidence from alkenone sea-surface temperatures". Paleoceanography. 10 (2): 197–219. Bibcode:1995PalOc...

Sonzogni C. Interhemispheric synchrony of the last deglaciation inferred from alkenone palaeothermometry. Nature 385, 707-710 (1997). Bard E, Arnold M, Maurice...

proxy uses variations in alkenone saturation in phytoplankton membranes. In contrast with carbonate paleothermometers, alkenone thermometry and TEX86 remain...

Andreas Mackensen; Kimitaka Kawamura; Richard D. Pancost (15 March 2010). "Alkenone and boron-based Pliocene pCO2 records". Earth and Planetary Science Letters...

2014 Assessing divergent SST behavior during the last 21 ka derived from alkenones and G. ruber Mg/Ca in the Equatorial Pacific, A Timmermann, J Sachs, O...

the Eocene is published by Evans et al. (2018). A 25-million-year-long alkenone-based record of surface temperature change in the Paleogene from the North...

last 16,000 years from records of planktonic stable oxygen isotopes and alkenone unsaturation ratios. Palaeogeography, Palaeoclimatology, Palaeoecology...