Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold 2026 Hydrogen isotopes of n-alkane biomarkers and brGDGT temperatures from Lake Tulane, Florida, USA dataset https://doi.org/10.1594/PANGAEA.989435 2026-01-26T06:29:31 This dataset includes temperatures derived from branched glycerol dialkyl glycerol tetraethers (brGDGTs) and regional hydrology changes reconstructed from hydrogen isotope ratios (δ2H) of n-alkanes extracted from a lacustrine sediment core from Lake Tulane, Florida, USA. In 1994, 8 cores from 6 locations (2 complete overlaps) were acquired from a transect along the north basin of Lake Tulane. Cores were taken with a 7.5-cm diameter Wright square-rod piston corer from an anchored raft. Separately, a single surface-water interface core was acquired from the north basin of Lake Tulane in 2010. brGDGTs and n-alkanes were extracted from archived core sections at 8-10 cm intervals in August of 2018 and from the surface-water interface core at 5 cm intervals in August of 2019. The archived core interval spanned Heinrich Stadials 4-2 (41,000-17,000 BP) and the surface-water interface core spanned 78-0 BP. brGDGT distributions from both cores were measured via atmospheric pressure chemical ionization high-performance liquid chromatography-mass spectrometry (APCI/HPLC–MS), and hydrogen isotope ratios of n-alkanes were measured on a Thermo Trace GC Ultra coupled to a Thermo Electron Delta V Advantage IRMS with an Isolink combustion furnace. The brGDGT data was converted to degrees Celsius (°C) following the open-sourced code provided in O'Beirne et al. (2023, doi:10.1016/j.gca.2023.08.019). Hydrogen isotope results are given in the conventional δ-notation. A proxy for seasonal precipitation and aridity (ε(C29-C23)) was created, which reflects the difference between the δ2H values of aquatic n-alkanes (δ2HC23) and terrestrial leaf wax δ2H values (δ2HC29) using the following equations: (1) α = (1000 + 𝛿2HC29)/(1000 + 𝛿2HC23), and (2) ε(C29-C23) = (α -1) x 1000. Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold Hilliker J L Werne Josef P jwerne@pitt.edu 0000-0002-7019-6024 Thompson A J in review Atmospheric transmission of temperature and precipitation change in Florida during North Atlantic Heinrich events Paleoceanography and Paleoclimatology O'Beirne Molly D mdobeirne@pitt.edu Scott Wesley P wps17@pitt.edu https://www.geology.pitt.edu/people/wesley-scott Werne Josef P jwerne@pitt.edu 0000-0002-7019-6024 2023 A critical assessment of lacustrine branched glycerol dialkyl glycerol tetraether (brGDGT) temperature calibration models journal article Geochimica et Cosmochimica Acta 359 https://doi.org/10.1016/j.gca.2023.08.019 100-118 81.500361 81.500361 27.585833 27.585833 81.500361 27.585833 2018-08-11T00:00:00 2018-08-11T00:00:00 vertical profile Lake_Tulane_AC Lake Tulane Archive Core 27.585833 81.500361 Florida, USA 2018-08-11T00:00:00 Core CORE Lake_Tulane_SC Lake Tulane Surface Core 27.585833 81.500361 Florida, USA 2018-08-11T00:00:00 Core CORE 269 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Event label Event Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold Event Latitude of event Latitude Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold Latitude Longitude of event Longitude Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold Longitude Date/Time of event Date/Time Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold Date/Time Core Core Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold Core Device type Device Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold Device AGE Age ka BP http://en.wikipedia.org/wiki/Kyr age http://purl.obolibrary.org/obo/PATO_0000011 Time T http://dbpedia.org/resource/Time Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold Age [ka BP] Temperature, water Temp °C Temperature Θ http://dbpedia.org/resource/Temperature water http://purl.obolibrary.org/obo/CHEBI_15377 Reconstructed, using branched GDGTs Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold Temp [°C] δ Deuterium, n-alkane C23 δD n-alkane C23 ‰ tricosane C23 See Device type column Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold vs. VSMOW δD n-alkane C23 [‰] δ Deuterium, n-alkane C27 δD n-alkane C27 ‰ heptacosane C27 See Device type column Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold vs. VSMOW δD n-alkane C27 [‰] δ Deuterium, n-alkane C29 δD n-alkane C29 ‰ nonacosane C29 https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:7613 See Device type column Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold vs. VSMOW δD n-alkane C29 [‰] δ Deuterium, n-alkane C31 δD n-alkane C31 ‰ hentriacontane C31 https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:5659 See Device type column Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold vs. VSMOW δD n-alkane C31 [‰] δ Deuterium, n-alkane C33 δD n-alkane C33 ‰ tritriacontane C33 https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:9751 See Device type column Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold vs. VSMOW δD n-alkane C33 [‰] δ Deuterium, n-alkane C35 δD n-alkane C35 ‰ pentatriacontane C35 See Device type column Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold vs. VSMOW δD n-alkane C35 [‰] ε ε ‰ See Device type column Arnold T Elliott tea27@pitt.edu https://www.geology.pitt.edu/people/elliott-arnold c29-c23 (‰ VSMOW) ε [‰] CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels citable Branched GDGTs Hydrogen isotopes Lake core Lake Tulane author114300 author114301 author33117 author61491 author83063 author83064 curlevel30 event3343253 event3343254 geocode1599 geocode1600 geocode1601 geocode2205 journal16885 journal6009 license21 method10902 method12510 method18052 param162302 param48492 param531876 param531880 param531882 param531884 param531886 param531888 param717 param78085 pi83064 ref137401 ref137408 term1073135 term2606205 term37878 term43972 term43975 term44230 term44231 term44232 term48224 term48228 term48234 term48489 term50804 term68636 term76992 topotype3