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  • 2010-2014  (8)
  • 2000-2004  (5)
  • 2014  (8)
  • 2001  (5)
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  • 2010-2014  (8)
  • 2000-2004  (5)
Year
  • 1
    Online Resource
    Online Resource
    Report and preliminary results of RV POSEIDON cruise POS464 : Las Palmas (Canary Islands) - Las Palmas (Canary Islands), 03.02.2014 - 18.02.2014 (2014)
    Bremen : MARUM
    Details Availability
    Keywords: Forschungsbericht
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (II, 29 S., 23,3 MB)
    Series Statement: Berichte aus dem MARUM und dem Fachbereich Geowissenschaften der Universität Bremen 304
    URL: http://nbn-resolving.de/urn:nbn:de:gbv:46-00103963-17
    URN: urn:nbn:de:gbv:46-00103963-17
    DDC: 550
    Language: English
    Location Call Number Limitation Availability
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    GEOMAR CATALOGUE
    Link to Library Catalog
    get availability status
  • 2
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    Laser-Induced Breakdown Spectroscopy for 24/7 Automatic Liquid Slag Analysis at a Steel Works (2014)
    American Chemical Society (ACS)
    Details
    Publication Date: 2014-09-10
    Description: Analytical Chemistry DOI: 10.1021/ac5022425
    Print ISSN: 0003-2700
    Electronic ISSN: 1520-6882
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society (ACS)
    Location Call Number Limitation Availability
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    PAPER CURRENT
  • 3
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    Distribution of intact and core tetraether lipids in water column profiles of suspended particulate matter off Cape Blanc, NW Africa (2014)
    Pergamon-Elsevier
    In:  EPIC3Organic Geochemistry, Pergamon-Elsevier, 72, pp. 1-13, ISSN: 0146-6380
    Details
    Publication Date: 2017-11-02
    Description: In the reconstruction of sea surface temperature (SST) from sedimentary archives, secondary sources, lateral transport and selective preservation are considered to be mainly negligible in terms of influencing the primary signal. This is also true for the archaeal glycerol dialkyl glycerol tetraethers (GDGTs) that form the basis for the TEX86 SST proxy. Our samples represent four years variability on a transect off Cape Blanc (NW Africa). We studied the subsurface production, vertical and lateral transport of intact polar lipids and core GDGTs in the water column at high vertical resolution on the basis of suspended particulate matter (SPM) samples from the photic zone, the subsurface oxygen minimum zone (OMZ), nepheloid layers (NL) and the water column between these. Furthermore we compared the water column SPM GDGT composition with that in underlying surface sediments. This is the first study that reports TEX86 values from the precursor intact polar lipids (IPLs) associated with specific head groups (IPL -specific TEX86). We show a clear deviation from the sea surface GDGT composition in the OMZ between 300 and 600 m. Since neither lateral transport nor selective degradation provides a satisfactory explanation for the observed TEX-derived temperature profiles with a bias towards higher temperatures for both core- and IPL -specific TEX86 values, we suggest that subsurface in situ production of archaea with a distinct relationship between lipid biosynthesis and temperature is the responsible mechanism. However, in the NW-African upwelling system the GDGT contribution of the OMZ to the surface sediments does not seem to affect the sedimentary TEX86 as it shows no bias and still reflects the signal of the surface waters between 0 and 60 m.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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    PAPER (OA)
  • 4
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    A four-year record of UK'37- and TEX86-derived sea surface temperature estimates from sinking particles in the filamentous upwelling region off Cape Blanc, Mauritania (2014)
    PANGAEA
    In:  Supplement to: Mollenhauer, Gesine; Basse, Andreas; Kim, Jung-Hyun; Sinninghe Damsté, Jaap S; Fischer, Gerhard (2015): A four-year record of UK′37- and TEX86-derived sea surface temperature estimates from sinking particles in the filamentous upwelling region off Cape Blanc, Mauritania. Deep Sea Research Part I: Oceanographic Research Papers, 97, 67-79, https://doi.org/10.1016/j.dsr.2014.11.015
    Details
    Publication Date: 2023-10-27
    Description: Lipid biomarker records from sinking particles collected by sediment traps are excellent tools to study the seasonality of biomarker production as well as processes of particle formation and settling, ultimately leading to the preservation of the biomarkers in sediments. Here we present records of the biomarker indices UK'37 based on alkenones and TEX86 based on isoprenoid glycerol dialkyl glycerol tetraethers (GDGTs), both used for the reconstruction of sea surface temperatures (SST). These records were obtained from sinking particles collected using a sediment trap moored in the filamentous upwelling zone off Cape Blanc, Mauritania, at approximately 1300 water depth during a four-year time interval between 2003 and 2007. Mass and lipid fluxes are highest during peak upwelling periods between October and June. The alkenone and GDGT records both display pronounced seasonal variability. Sinking velocities calculated from the time lag between measured SST maxima and minima and corresponding index maxima and minima in the trap samples are higher for particles containing alkenones (14-59 m/d) than for GDGTs (9-17 m/d). It is suggested that GDGTs are predominantly exported from shallow waters by incorporation in opal-rich particles. SST estimates based on the UK'37 index faithfully record observed fluctuations in SST during the study period. Temperature estimates based on TEX86 show smaller seasonal amplitudes, which can be explained with either predominant production of GDGTs during the warm season, or a contribution of GDGTs exported from deep waters carrying GDGTs in a distribution that translates to a high TEX86 signal.
    Type: Dataset
    Format: application/zip, 4 datasets
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    DATA PANGAEA
  • 5
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    Fluxes of particles collected by sediment trap moored at station CBeu, 2003-06 to 2004-03 (2014)
    PANGAEA
    Details
    Publication Date: 2023-10-27
    Keywords: Alkenone, C37 total (C37:2+C37:3); Alkenone, unsaturation index UK'37; Alkenone, unsaturation index UK'37, standard deviation; Branched and isoprenoid tetraether index; Calcium carbonate, flux; Cape Blanc, Mauritania; Carbon, organic, flux; CBeu1; CBeu2; CBeu3; CBeu4; Cbi-1; CBi-2; CBi-3; CBi-4; Comment; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; Event label; Flux of total mass; Latitude of event; Lithogenic, flux; Longitude of event; MOOR; Mooring; Nitrogen, total, flux; Opal, flux; Sample code/label; Tetraether index of 86 carbon atoms
    Type: Dataset
    Format: text/tab-separated-values, 1129 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    GDGT fractional abundance collected by sediment trap moored at station CBeu, 2003-06 to 2004-03 (2014)
    PANGAEA
    Details
    Publication Date: 2023-10-27
    Keywords: Acyclic glycerol dialkyl glycerol tetraether, fractional abundance; Cape Blanc, Mauritania; CBeu1; CBeu2; CBeu3; CBeu4; Cbi-1; CBi-2; CBi-3; CBi-4; Comment; Crenarchaeol, fractional abundance; Crenarchaeol regio-isomer, fractional abundance; DATE/TIME; Date/time end; DEPTH, water; Dicyclic glycerol dialkyl glycerol tetraether, fractional abundance; Duration, number of days; Event label; Latitude of event; Longitude of event; Monocyclic glycerol dialkyl glycerol tetraether, fractional abundance; MOOR; Mooring; Sample code/label; Tricyclic glycerol dialkyl glycerol tetraether, fractional abundance
    Type: Dataset
    Format: text/tab-separated-values, 814 data points
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    DATA PANGAEA
  • 7
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    UK'37 and TEX86 on suspended matter collected during POSEIDON cruise POS396 off NW Africa (2014)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: 22-10; Acyclic glycerol dialkyl glycerol tetraether; Acyclic glycerol dialkyl glycerol tetraether, fractional abundance; Alkenone, C37:2Me; Alkenone, C37:3Me; Alkenone, unsaturation index UK'37; Crenarchaeol; Crenarchaeol, fractional abundance; Crenarchaeol regio-isomer; Crenarchaeol regio-isomer, fractional abundance; CT; DEPTH, water; Dicyclic glycerol dialkyl glycerol tetraether; Dicyclic glycerol dialkyl glycerol tetraether, fractional abundance; LATITUDE; LONGITUDE; Monocyclic glycerol dialkyl glycerol tetraether; Monocyclic glycerol dialkyl glycerol tetraether, fractional abundance; Northwest Africa; POS396; POS396-track; Poseidon; Sample ID; Sample volume; Temperature, water; Tetraether index of 86 carbon atoms; Tricyclic glycerol dialkyl glycerol tetraether; Tricyclic glycerol dialkyl glycerol tetraether, fractional abundance; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 199 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    UK'37 and TEX86 on suspended matter collected during Maria S. Merian cruise MSM11/2 off NW Africa (2014)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Acyclic glycerol dialkyl glycerol tetraether; Acyclic glycerol dialkyl glycerol tetraether, fractional abundance; Alkenone, C37:2Me; Alkenone, C37:3Me; Alkenone, unsaturation index UK'37; Crenarchaeol; Crenarchaeol, fractional abundance; Crenarchaeol regio-isomer; Crenarchaeol regio-isomer, fractional abundance; CT; DEPTH, water; Dicyclic glycerol dialkyl glycerol tetraether; Dicyclic glycerol dialkyl glycerol tetraether, fractional abundance; LATITUDE; LONGITUDE; Maria S. Merian; Monocyclic glycerol dialkyl glycerol tetraether; Monocyclic glycerol dialkyl glycerol tetraether, fractional abundance; MSM11/2; MSM11/2-track; Sample ID; Sample volume; Temperature, water; Tetraether index of 86 carbon atoms; Tricyclic glycerol dialkyl glycerol tetraether; Tricyclic glycerol dialkyl glycerol tetraether, fractional abundance; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 480 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Alkenone data of sediment trap CB3 (2001)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Alkenone, C37, flux; Alkenone, C37:3+C37:2; Alkenone, C37/C38 ratio; Alkenone, C37 normalized to total organic carbon; Alkenone, C38:3Et+C38:2Et+C38:3Me+C38:2Me; Alkenone, unsaturation index UK'37; Alkenone, unsaturation index UK38Et; Alkenone, unsaturation index UK38Me; Calculated; Calculated, see reference(s); Calculated from C37 alkenones (Prahl & Wakeham, 1987); Calculated from C38 alkenones (Brassel, 1993, in Engel, Organic Geochemistry); Calculated from UK'37 (Prahl et al., 1988); CB3_trap; Center for Marine Environmental Sciences; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; Gas chromatography; GeoB; Geosciences, University of Bremen; Heptatriaconta-15E,22E-dien-2-one; Heptatriaconta-8E,15E,22E-trien-2-one; M12/1; MARUM; Meteor (1986); Octatriaconta-16E,23E-dien-2-one; Octatriaconta-16E,23E-dien-3-one; Octatriaconta-9E,16E,23E-trien-2-one; Octatriaconta-9E,16E,23E-trien-3-one; Sample code/label; Sea surface temperature, annual mean; SFB261; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Trap; TRAP
    Type: Dataset
    Format: text/tab-separated-values, 601 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Alkenone data of sediment trap CB1 (2001)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Alkenone, C37, flux; Alkenone, C37:3+C37:2; Alkenone, C37/C38 ratio; Alkenone, C37 normalized to total organic carbon; Alkenone, C38:3Et+C38:2Et+C38:3Me+C38:2Me; Alkenone, unsaturation index UK'37; Alkenone, unsaturation index UK38Et; Alkenone, unsaturation index UK38Me; Calculated; Calculated, see reference(s); Calculated from C37 alkenones (Prahl & Wakeham, 1987); Calculated from C38 alkenones (Brassel, 1993, in Engel, Organic Geochemistry); Calculated from UK'37 (Prahl et al., 1988); CB1_trap; Center for Marine Environmental Sciences; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; Gas chromatography; GeoB; Geosciences, University of Bremen; Heptatriaconta-15E,22E-dien-2-one; Heptatriaconta-8E,15E,22E-trien-2-one; M6/6; MARUM; Meteor (1986); Octatriaconta-16E,23E-dien-2-one; Octatriaconta-16E,23E-dien-3-one; Octatriaconta-9E,16E,23E-trien-2-one; Octatriaconta-9E,16E,23E-trien-3-one; Sample code/label; Sea surface temperature, annual mean; SFB261; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Trap; TRAP
    Type: Dataset
    Format: text/tab-separated-values, 234 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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