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  • 2015-2019  (33)
  • 2005-2009  (1)
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  • 1
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    GDGT-based proxies of sediment core YD0903 (2016)
    PANGAEA
    In:  Supplement to: Ge, HuangMin; Zhang, ChuanLun; Versteegh, Gerard J M; Chen, LingLing; Fan, DaiDu; Dong, Liang; Liu, JingJing (2015): Evolution of the East China Sea sedimentary environment in the past 14 kyr: Insights from tetraethers-based proxies. Science China Earth Sciences, 59(5), 927-938, https://doi.org/10.1007/s11430-015-5229-9
    Details
    Publication Date: 2023-06-27
    Description: We reconstruct the environmental evolution of the East China Sea in the past 14 kyr based on glycerol dialkyl glycerol tetraethers (GDGTs) in a sediment core from the subaqueous Yangtze River Delta. Two primary phases are recognized. Phase I (13.8-8 cal kyr BP) reflects a predominantly continental influence, showing distinctly higher concentrations of branched GDGTs (averaged 143 ng/g dry sediment weight, dsw) than isoprenoid GDGTs (averaged 36 ng/g dsw), high BIT index (branched vs. isoprenoid tetraethers) values (〉0.78) and a fluctuating GDGT-0/crenarchaeol ratio (R0/5, varied from 0.52 to 3.81). Within this interval, temporal increases of terrestrial and marine influence are attributed to Younger Dryas (YD) (ca. 12.9-12.2 cal kyr BP) cold event and melt-water pulse (MWP) -1B (11.5-11.1 cal kyr BP), respectively. The prominent transition from 8 to 7.9 cal kyr BP shows a sharp decrease in BIT index value (〈0.4) and increase in crenarchaeol, which marks the beginning of phase II. Afterwards, the proxies remain relatively constant, which indicates that phase II (7.9 cal kyr BP-present) is a shelf sedimentary environment with high stand of sea level. Overall, the BIT index in our record serves as a good marker for terrestrial influence at the site, and likely reflects the flooding history of the region. The TEX86 (TetraEther Index of tetraethers consisting of 86 carbons) proxy is not applicable in phase I because of an excess terrestrial influence; but it seems to be valid for revealing the annual SST in phase II (21.6±0.9°C, n=49). In contrast, the MBT'/CBT (Methylation of Branched Tetraethers and Cyclization of Branched Tetraethers) proxy appears to faithfully record the annual mean air temperature (MAT) (14.3±0.63°C, n=68) and presents an integrated signal over the middle and lower Yangtze River drainage basin.
    Keywords: Acyclic glycerol dialkyl glycerol tetraether; AGE; Branched and isoprenoid tetraether index; Branched glycerol dialkyl glycerol tetraether; Crenarchaeol; Crenarchaeol isomer; DEPTH, sediment/rock; Dicyclic glycerol dialkyl glycerol tetraether; East China Sea; Glycerol dialkyl glycerol tetraethers; Isoprenoid glycerol dialkyl glycerol tetraether; Monocyclic glycerol dialkyl glycerol tetraether; pH; Ratio; Sample code/label; Sea surface temperature, annual mean; Tetraether index of 86 carbon atoms; Tricyclic glycerol dialkyl glycerol tetraether; YD0903
    Type: Dataset
    Format: text/tab-separated-values, 1088 data points
    Location Call Number Limitation Availability
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  • 2
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    Temperature proxies of sediment cores from the Sea of Marmara (2015)
    PANGAEA
    In:  Supplement to: Becker, Kevin W; Lipp, Julius S; Versteegh, Gerard J M; Wörmer, Lars; Hinrichs, Kai-Uwe (2015): Rapid and simultaneous analysis of three molecular sea surface temperature proxies and application to sediments from the Sea of Marmara. Organic Geochemistry, 85, 42-53, https://doi.org/10.1016/j.orggeochem.2015.04.008
    Details
    Publication Date: 2023-06-03
    Description: Reconstructing ocean temperature values is a major target in paleoceanography and climate research. However, most temperature proxies are organism-based and thus suffer from an "ecological bias". Multiproxy approaches can potentially overcome this bias but typically require more investment in time and resources, while being susceptible to errors induced by sample preparation steps necessary before analysis. Three lipid-based temperature proxies are widely used: UK'37 (based on long chain alkenones from phytoplanktonic haptophytes), TEX86 [based on glycerol dialkyl glycerol tetraethers (GDGTs) from pelagic archaea] and LDI (based on long chain diols from phytoplanktonic eustigmatophytes). So far, separate analytical methods, including gas chromatography (GC) and liquid chromatography (LC), have been used to determine these proxies. Here we present a sensitive method for determining all three in a single normal phase high performance LC-atmospheric pressure chemical ionization mass spectrometry (NP-HPLC-APCI-MS) analysis. Each of the long chain alkenones and long chain diols was separated and unambiguously identified from the accurate masses and characteristic fragmentation during multiple stage MS analysis (MS2). Comparison of conventional GC and HPLC-MS methods showed similar results for UK'37 and LDI, respectively, using diverse environmental samples and an Emiliania huxleyi culture. Including the three sea surface temperature (SST) proxies; the NP-HPLC-APCI-MS method in fact allows simultaneous determination of nine paleoenvironmental proxies. The extent to which the ecology of the source organisms (ecological bias) influences lipid composition and thereby the reconstructed temperature values was demonstrated by applying the new method to a sediment core from the Sea of Marmara, covering the last 21 kyr BP. Reconstructed SST values differed considerably between the proxies for the Last Glacial Maximum (LGM) and the period of Sapropel S1 formation at ca. 10 kyr BP, whereas the trends during the late Holocene were similar. Changes in the composition of alkenone-producing species at the transition from the LGM to the Bølling/Allerød (B/A) were inferred from unreasonably high UK'37-derived SST values (ca. 20 °C) during the LGM. We ascribe discrepancies between the reconstructed temperature records during S1 deposition to habitat change, e.g. a different depth due to changes in nutrient availability.
    Keywords: Center for Marine Environmental Sciences; DARCLIFE; Deep subsurface Archaea: carbon cycle, life strategies, and role in sedimentary ecosystems; MARUM
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 3
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    Lipid analytic of environmental and cultural samples (2016)
    PANGAEA
    In:  Supplement to: Zhu, Chun; Wakeham, Stuart G; Elling, Felix J; Basse, Andreas; Mollenhauer, Gesine; Versteegh, Gerard J M; Könneke, Martin; Hinrichs, Kai-Uwe (2016): Stratification of archaeal membrane lipids in the ocean and implications for adaptation and chemotaxonomy of planktonic archaea. Environmental Microbiology, 18(12), 4324-4336, https://doi.org/10.1111/1462-2920.13289
    Details
    Publication Date: 2023-09-15
    Description: Membrane lipids of marine planktonic archaea have provided unique insights into archaeal ecology and paleoceanography. However, past studies of archaeal lipids in suspended particulate matter (SPM) and sediments mainly focused on a small class of fully saturated glycerol dibiphytanyl glycerol tetraether (GDGT) homologues identified decades ago. The apparent low structural diversity of GDGTs is in strong contrast to the high diversity of metabolism and taxonomy among planktonic archaea. Furthermore, adaptation of archaeal lipids in the deep ocean remains poorly constrained. We report the archaeal lipidome in SPM from diverse oceanic regimes. We extend the known inventory of planktonic archaeal lipids to include numerous unsaturated archaeal ether lipids (uns-AELs). We further reveal i) different thermal regulations and polar headgroup compositions of membrane lipids between the epipelagic (〈= 100 m) and deep (〉 100 m) populations of archaea; ii) stratification of unsaturated GDGTs with varying redox conditions; and iii) enrichment of tetra-unsaturated archaeol and fully saturated GDGTs in epipelagic and deep oxygenated waters, respectively. Such stratified lipid patterns are consistent with the typical distribution of archaeal phylotypes in marine environments. We thus provide an ecological context for GDGT-based paleoclimatology and bring about the potential use of uns-AELs as biomarkers for planktonic Euryarchaeota. This article is protected by copyright. All rights reserved.
    Keywords: 02222230; Acyclic glycerol dialkyl glycerol tetraether; Acyclic glycerol dialkyl glycerol tetraether (peak area); Archaeol; Archaeol (peak area); Area/locality; Black Sea; CARIACO_Trap_2007_1; Cariaco Basin; CB_Slop_trap; CB_trap; CBi_trap; Center for Marine Environmental Sciences; Code; Comment; Core lipids, total; Crenarchaeol; Crenarchaeol (peak area); Crenarchaeol isomer (peak area); Crenarchaeol regio-isomer; DeerBay_trap; Deer Bay, Vancouver Island; DEPTH, water; Dicyclic glycerol dialkyl glycerol tetraether (peak area); Diglycosyl acyclic glycerol dialkyl glycerol tetraether (peak area); Diglycosyl crenarchaeol (peak area); Diglycosyl crenarchaeol isomer (peak area); Diglycosyl dicyclic glycerol dialkyl glycerol tetraether (peak area); Diglycosyl glycerol dialkyl glycerol tetraethers, total; Diglycosyl monocyclic glycerol dialkyl glycerol tetraether (peak area); Diglycosyl monohydroxylated glycerol dialkyl glycerol tetraethers, total; Diglycosyl tetracyclic glycerol dialkyl glycerol tetraether (peak area); Diglycosyl tricyclic glycerol dialkyl glycerol tetraether (peak area); Diunsaturated archaeol (peak area); Diunsaturated archaeol isomer (peak area); Diunsaturated glycerol dialkyl glycerol tetraether (peak area); Eastern Tropical North Pacific; EffinghamInlet_trap; Effingham Inlet, Vancouver Island; Equatorial Pacific; ETNP_trap; Event label; Glycerol dialkyl glycerol tetraethers, total; Heptaunsaturated archaeol (peak area); Heptaunsaturated glycerol dialkyl glycerol tetraether (peak area); Hexaunsaturated archaeol (peak area); Hexaunsaturated glycerol dialkyl glycerol tetraether (peak area); Hexosephosphohexose acyclic glycerol dialkyl glycerol tetraether (peak area); Hexosephosphohexose crenarchaeol (peak area); Hexosephosphohexose dicyclic glycerol dialkyl glycerol tetraether (peak area); Hexosephosphohexose glycerol dialkyl glycerol tetraethers, total; Hexosephosphohexose monocyclic glycerol dialkyl glycerol tetraether (peak area); Hydroxyarchaeols; Hydroxylated glycerol dialkyl glycerol tetraethers, total; Instrument; Intact polar lipids, total; Liquid chromatography-mass spectrometry (LC-MS); MARUM; Mono, di, tricyclic glycerol dialkyl glycerol tetraethers; Monocyclic glycerol dialkyl glycerol tetraether (peak area); Monoglycosyl acyclic glycerol dialkyl glycerol tetraether (peak area); Monoglycosyl crenarchaeol (peak area); Monoglycosyl crenarchaeol isomer (peak area); Monoglycosyl dicyclic glycerol dialkyl glycerol tetraether (peak area); Monoglycosyl dihydroxylated acyclic glycerol dialkyl glycerol tetraether (peak area); Monoglycosyl dihydroxylated dicyclic glycerol dialkyl glycerol tetraether (peak area); Monoglycosyl dihydroxylated monocyclic glycerol dialkyl glycerol tetraether (peak area); Monoglycosyl glycerol dialkyl glycerol tetraethers, total; Monoglycosyl monocyclic glycerol dialkyl glycerol tetraether (peak area); Monoglycosyl monohydroxylated acyclic glycerol dialkyl glycerol tetraether (peak area); Monoglycosyl monohydroxylated dicyclic glycerol dialkyl glycerol tetraether (peak area); Monoglycosyl monohydroxylated glycerol dialkyl glycerol tetraethers, total; Monoglycosyl monohydroxylated monocyclic glycerol dialkyl glycerol tetraether (peak area); Monoglycosyl tetracyclic glycerol dialkyl glycerol tetraether (peak area); Monoglycosyl tricyclic glycerol dialkyl glycerol tetraether (peak area); Monohydroxylated acyclic glycerol dialkyl glycerol tetraether (peak area); Monohydroxylated dicyclic glycerol dialkyl glycerol tetraether (peak area); Monohydroxylated monocyclic glycerol dialkyl glycerol tetraether (peak area); Monounsaturated archaeol (peak area); Monounsaturated glycerol dialkyl glycerol tetraether (peak area); Mooring (short time); MOORST; Octaunsaturated archaeol (peak area); Octaunsaturated glycerol dialkyl glycerol tetraether (peak area); off Cap Blanc; Oxygen; Pentaunsaturated archaeol (peak area); Pentaunsaturated glycerol dialkyl glycerol tetraether (peak area); Ring index of diglycosyl glycerol dialkyl glycerol tetraethers; Ring index of diglycosyl monohydroxylated glycerol dialkyl glycerol tetraethers; Ring index of glycerol dialkyl glycerol tetraethers; Ring index of hexosephosphohexose glycerol dialkyl glycerol tetraethers; Ring index of hydroxylated glycerol dialkyl glycerol tetraethers; Ring index of monoglycosyl glycerol dialkyl glycerol tetraethers; Ring index of monoglycosyl monohydroxylated glycerol dialkyl glycerol tetraethers; Salinity; Site; sn-2 monohydroxylated archaeol (peak area); sn-3 monohydroxylated archaeol (peak area); Station7_trap; Temperature, water; Tetraether index of 86 carbon atoms of diglycosyl glycerol dialkyl glycerol tetraethers; Tetraether index of 86 carbon atoms of glycerol dialkyl glycerol tetraethers; Tetraether index of 86 carbon atoms of hexosephosphohexose glycerol dialkyl glycerol tetraethers; Tetraether index of 86 carbon atoms of monoglycosyl glycerol dialkyl glycerol tetraethers; tetraunsaturated archaeol, total; Tetraunsaturated archaeol (peak area); Tetraunsaturated archaeol isomer (peak area); Tetraunsaturated glycerol dialkyl glycerol tetraether (peak area); Thomas G. Thompson; Trap; TRAP; Trap, sediment; TRAPS; Tricyclic glycerol dialkyl glycerol tetraether (peak area); Triunsaturated archaeol (peak area); Triunsaturated archaeol isomer (peak area); Triunsaturated glycerol dialkyl glycerol tetraether (peak area); TT007; TT007_8-Murray_trap; Unsaturated archaeol, total; Unsaturated glycerol dialkyl glycerol tetraethers, total; Unsaturation index of unsaturated archaeols; Unsaturation index of unsaturated glycerol dialkyl glycerol tetraethers; Volume
    Type: Dataset
    Format: text/tab-separated-values, 9851 data points
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  • 4
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    Micro-FTIR and py-GC-MS data on Thalassiphora pelagica of ODP sample 120-748B-18H-17W,55-57 (2019)
    PANGAEA
    In:  Supplement to: Versteegh, Gerard J M; Houben, Alexander J P; Zonneveld, Karin A F (in review): Better molecular preservation of organic matter in an oxic than in a sulphidic depositional environment: evidence from of Thalassiphora pelagica (Dinoflagellata, Eocene) cysts. Biogeosciences Discussions, https://doi.org/10.5194/bg-2019-373
    Details
    Publication Date: 2024-01-09
    Description: This dataset contains the processed and raw data belonging to the organic geochemical analyses on cysts of the dinoflagellate Thalassiphora pelagica in sample 18H 17W 55-57 cm from IODP Leg 120 Site 748B (58°26.45'S, 78°58.89'E). The GC/MS files are in NetCDF format, the raw micro-FTIR data in Bruker-Opus format. The processed micro-FTIR data are in ASCII Format.
    Keywords: Biopolymer; Cyst; Diagenesis; Dinoflagellate; Geopolymer; Infrared Spectroscopy; Ocean Drilling Program; ODP; Organic Geochemistry; Pyrolysis; Sulphurization
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 5
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    Processed and raw data on Thalassiphora pelagica of ODP sample 120-748B-18H-17W,55-57 (2019)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Description: This dataset contains the processed and raw data belonging to the organic geochemical analyses on cysts of the dinoflagellate Thalassiphora pelagica in sample 18H 17W 55-57 cm from IODP Leg 120 Site 748B (58°26.45'S, 78°58.89'E). The GC/MS files are in NetCDF format, the raw micro-FTIR data in Bruker-Opus format. The processed micro-FTIR data are in ASCII Format.
    Keywords: 120-748B; Biopolymer; Cyst; Diagenesis; Dinoflagellate; DRILL; Drilling/drill rig; File format; File name; File size; Geopolymer; Infrared Spectroscopy; Joides Resolution; Leg120; Ocean Drilling Program; ODP; Organic Geochemistry; Pyrolysis; Sample code/label; South Indian Ridge, South Indian Ocean; Sulphurization; Uniform resource locator/link to file
    Type: Dataset
    Format: text/tab-separated-values, 30 data points
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  • 6
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    Distribution of pollen grains in sediment core T89-16-PC (Table 2) (2005)
    PANGAEA
    In:  Supplement to: Scourse, James D; Marret, Fabienne; Versteegh, Gerard J M; Jansen, J H Fred; Schefuß, Enno; van der Plicht, Johannes (2005): High resolution last deglaciation record from the Congo fan reveals significance of mangrove pollen and biomarkers as indicators of shelf transgression. Quaternary Research, 64(1), 57-69, https://doi.org/10.1016/j.yqres.2005.03.002
    Details
    Publication Date: 2024-03-06
    Description: High abundances of mangrove pollen have been associated with transgressive cycles on tropical margins, but the detailed relations between systems tracts and the taphonomy of the pollen are unclear. We report here the occurrence and high abundance of Rhizophora pollen, in association with taraxerol, a Rhizophora-sourced biomarker, from a high-resolution Congo fan core covering the last deglaciation. An age model based on 14C dates enables the temporal changes in taraxerol content and the percentage frequencies and flux (pollen grains (pg)/cm**2/(10**3 yr)) of mangrove pollen to be compared quantitatively with the lateral rate of transgression across the flooding surface (derived from glacio-hydro-isostatic model output and the bathymetry of the margin). Rhizophora pollen concentrations and taraxerol content of the sediment are very strongly positively correlated with the lateral rate of transgression and indicate, independently of any sequence stratigraphic context, that mangrove pollen spikes are associated with the transgressive systems tract rather than the highstand systems tract or maximum flooding surface. Lower-resolution longer-term records from this margin indicate an association between taraxerol concentrations and transgressive rather than regressive phases. The flux of these materials to the Congo fan is interpreted as a function of the erosion of flooded mangrove swamp on the shelf and, less importantly, changing extent of mangrove habitat, during sea-level rise. Congo River palaeoflood events also result in reworking of mangrove pollen and supply to the fan, but this mechanism is subdominant. Rhizophora pollen has been underestimated in many palynological studies undertaken on cores from the African margin because of inappropriate sieve mesh size used during laboratory preparation.
    Keywords: Acacia; Alchornea; Allophylus; Altenanthera; Araliaceae; Asteraceae; Canthium; Caryophyllaceae; Cassia; Celtis; Chenopodiaceae; Cochlospermum-type; Combretaceae; Cyperaceae; DEPTH, sediment/rock; Diospyros; Dobera-type; Ebenaceae undifferentiated; Euphorbiaceae; Fagara; Ficus; Hymenocardia; Isoberlinia; Lannea; Liliaceae; Macaranga-type; Manilkara; Myrica; Myrtaceae; Nauclea; NIOZ89; Oleaceae; PC; Piston corer; Poaceae; Podocarpus; Pollen, total; Pollen indeterminata; Pseudarthria; Rhizophora; Rubiaceae; Rullia; Salvadoraceae; Sapindaceae; Schefflera; Schrebera; Securinega; Size fraction; Southeast Atlantic; Spores; Spores, monolete; Spores, trilete; Syncepalum; Syzygium; T89-16; T89-16-PC; Tamarindus; Tetrochidium; Tyro; Uapaca
    Type: Dataset
    Format: text/tab-separated-values, 423 data points
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  • 7
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    Processed data on Thalassiphora pelagica of ODP sample 120-748B-18H-17W,55-57 (20190711_1531) (2019)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Description: This dataset contains the processed and raw data belonging to the organic geochemical analyses on cysts of the dinoflagellate Thalassiphora pelagica in sample 18H 17W 55-57 cm from IODP Leg 120 Site 748B (58°26.45'S, 78°58.89'E). The GC/MS files are in NetCDF format, the raw micro-FTIR data in Bruker-Opus format. The processed micro-FTIR data are in ASCII Format.
    Keywords: 120-748B; Biopolymer; Cyst; Diagenesis; Dinoflagellate; DRILL; Drilling/drill rig; Geopolymer; Infrared Spectroscopy; Joides Resolution; Leg120; Ocean Drilling Program; ODP; Organic Geochemistry; Pyrolysis; Sample code/label; South Indian Ridge, South Indian Ocean; Sulphurization; Transmittance; Wave number
    Type: Dataset
    Format: text/tab-separated-values, 7041 data points
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  • 8
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    Processed data on Thalassiphora pelagica of ODP sample 120-748B-18H-17W,55-57 (20190711_1513) (2019)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 120-748B; Biopolymer; Cyst; Diagenesis; Dinoflagellate; DRILL; Drilling/drill rig; Geopolymer; Infrared Spectroscopy; Joides Resolution; Leg120; Ocean Drilling Program; ODP; Organic Geochemistry; Pyrolysis; Sample code/label; South Indian Ridge, South Indian Ocean; Sulphurization; Transmittance; Wave number
    Type: Dataset
    Format: text/tab-separated-values, 7041 data points
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  • 9
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    Fluid Fluxes and Manganese Nodules - Version 1 (2018)
    PANGAEA
    Details
    Publication Date: 2024-02-16
    Description: Please see new version: doi:10.1594/PANGAEA.933062
    Type: Dataset
    Format: application/zip, 0 datasets
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  • 10
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    (Table 3) UK'37, LDI, TEX86 and corresponding SST values with different methods (2015)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: Alkenone, unsaturation index UK'37; Alkenone, unsaturation index UK'37, standard deviation; Center for Marine Environmental Sciences; Comment; DARCLIFE; Deep subsurface Archaea: carbon cycle, life strategies, and role in sedimentary ecosystems; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; Gas chromatography - Flame Ionization Detection (GC-FID); Gas chromatography - Mass spectrometry (GC-MS); GC; GeoB15103-2; GeoB15104-1; GeoB15104-2; GeoB15105-2; GeoB15105-4; Gravity corer; High Performance Liquid Chromatography (NP-HPLC–APCI-MS); Latitude of event; Long chain diol index; Long chain diol index, standard deviation; Longitude of event; M84/1; M84/1_120-1; M84/1_122-1; M84/1_123-1; M84/1_127-1; M84/1_129-1; MARUM; Meteor (1986); MUC; MultiCorer; Sea surface temperature, annual mean; Sea surface temperature, annual mean, standard deviation; Tetraether index of 86 carbon atoms; Tetraether index of 86 carbon atoms, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 295 data points
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