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  • Data  (16)
  • 2005-2009
  • 1995-1999  (16)
  • 1965-1969
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Year
  • 1
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    Alkenones in the northwestern Mediterranean Sea (1999)
    PANGAEA
    In:  Supplement to: Sicre, Marie-Alexandrine; Ternois, Yann; Miquel, Juan Carlos; Marty, Jean-Claude (1999): Alkenones in the Northwestern Mediterranean sea: interannual variability and vertical transfer. Geophysical Research Letters, 26(12), 1735-1738, https://doi.org/10.1029/1999GL900353
    Details
    Publication Date: 2024-02-01
    Description: C37 alkenone fluxes were measured with sediment traps at 200 m depth over the years 1989/1990 and 1993/1994 to assess the interannual variability of the alkenone flux from the surface waters of the Mediterranean Sea. Fall and spring were identified as the high flux periods. SST estimates derived from the UK'37 index indicated 50 m and 30 m as major production depths in spring and fall, respectively. Althought interannual variation of alkenone fluxes was notable, the seasonality and depth of production appeared to be recurrent features of the coccolithophorid cycle of production. Alkenone fluxes at 1000 m measured over the year 1993/1994 were about 5 times lower than at 200 m and show no evidence of preferential preservation relative to the organic carbon between these depths. SST predicted at 200 m and 1000 m indicated a remarkably good transfer of the surface temperature signal to deeper layers.
    Keywords: Biogeochemical Processes in the Oceans and Fluxes; DYF16; DYF17; DYF18; DYFAMED; JGOFS; Joint Global Ocean Flux Study; MEDAR/MEDATLAS; Mediterranean Data Archaeology and Rescue; PROOF; Time-series station; Trap; TRAP
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 2
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    The C37 alkenone record of sea water of time series station DYNAPROC (1999)
    PANGAEA
    In:  Supplement to: Bentaleb, Ilhem; Grimalt, Joan O; Vidussi, Francesca; Marty, Jean-Claude; Martin, Valérie; Denis, Michel; Hatté, C; Fontugne, Michel R (1999): The C37 alkenone record of seawater temperature during seasonal thermocline stratification. Marine Chemistry, 64(4), 301-313, https://doi.org/10.1016/S0304-4203(98)00079-6
    Details
    Publication Date: 2024-02-01
    Description: The concentrations of suspended particulate pigments, C37-C38 alkenones, total organic carbon and nitrogen in the Ligurian Sea (northwestern Mediterranean) have been studied at 5 and 30 m depth during well defined thermocline conditions. An accurate description of the short term changes of these compounds has been achieved by means of four 36-h sampling cycles each encompassing consecutive filtration periods of 4 h. During sampling the thermocline changes were followed closely by simultaneous measurements of water column temperature, salinity and other physical parameters. The analysis of the collected samples indicates that the Haptophyte pigments and alkenones are essentially synthesized at the levels of highest primary production and therefore the C37 alkenone record reflects the seawater temperature at this depth level. The study also shows that part of these alkenones are distributed throughout the water column in association to the suspended particles. This process results in C37 alkenone distributions that, due to their high resistance to chemical and microbial degradation, record the temperature of the highest primary productivity layers even at shallow (e.g., 5 m depth) or deep (e.g., 1100 m depth) waters.
    Keywords: Biogeochemical Processes in the Oceans and Fluxes; CTD/Rosette; CTD-RO; DYNAPROC; DYNAPROC_CYCLE1; DYNAPROC_CYCLE2; DYNAPROC_CYCLE3; DYNAPROC_CYCLE4; JGOFS; Joint Global Ocean Flux Study; Le Suroît; PROOF
    Type: Dataset
    Format: application/zip, 4 datasets
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    DATA PANGAEA
  • 3
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    Alkenones, unsaturation index UK`37 at trap DYF8 (1996)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: Alkenone, unsaturation index UK'37; Biogeochemical Processes in the Oceans and Fluxes; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; DYF8; DYFAMED; JGOFS; Joint Global Ocean Flux Study; PROOF; Sample code/label; Time-series station; Trap; TRAP
    Type: Dataset
    Format: text/tab-separated-values, 4 data points
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  • 4
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    C37 alkenones at station DYNAPROC_CYCLE1 (1999)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: Alkenone, unsaturation index UK'37; Biogeochemical Processes in the Oceans and Fluxes; Calculated, see reference(s); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; DYNAPROC; DYNAPROC_CYCLE1; Gas chromatography; Heptatriaconta-15E,22E-dien-2-one; Heptatriaconta-8E,15E,22E-trien-2-one; JGOFS; Joint Global Ocean Flux Study; Le Suroît; 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; PROOF; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 80 data points
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  • 5
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    C37 alkenones at station DYNAPROC_CYCLE2 (1999)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: Alkenone, unsaturation index UK'37; Biogeochemical Processes in the Oceans and Fluxes; Calculated, see reference(s); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; DYNAPROC; DYNAPROC_CYCLE2; Gas chromatography; Heptatriaconta-15E,22E-dien-2-one; Heptatriaconta-8E,15E,22E-trien-2-one; JGOFS; Joint Global Ocean Flux Study; Le Suroît; 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; PROOF; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 136 data points
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  • 6
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    C37 alkenones at station DYNAPROC_CYCLE3 (1999)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: Alkenone, unsaturation index UK'37; Biogeochemical Processes in the Oceans and Fluxes; Calculated, see reference(s); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; DYNAPROC; DYNAPROC_CYCLE3; Gas chromatography; Heptatriaconta-15E,22E-dien-2-one; Heptatriaconta-8E,15E,22E-trien-2-one; JGOFS; Joint Global Ocean Flux Study; Le Suroît; 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; PROOF; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 128 data points
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    DATA PANGAEA
  • 7
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    C37 alkenones at station DYNAPROC_CYCLE4 (1999)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: Alkenone, unsaturation index UK'37; Biogeochemical Processes in the Oceans and Fluxes; Calculated, see reference(s); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; DYNAPROC; DYNAPROC_CYCLE4; Gas chromatography; Heptatriaconta-15E,22E-dien-2-one; Heptatriaconta-8E,15E,22E-trien-2-one; JGOFS; Joint Global Ocean Flux Study; Le Suroît; 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; PROOF; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 128 data points
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    DATA PANGAEA
  • 8
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    Alkenones in the Mediterranean Sea (1996)
    PANGAEA
    In:  Supplement to: Ternois, Yann; Sicre, Marie-Alexandrine; Boireau, Anne; Marty, Jean-Claude; Miquel, Juan Carlos (1996): Production pattern of alkenones in the Mediterranean Sea. Geophysical Research Letters, 23(22), 3171-3174, https://doi.org/10.1029/96GL02910
    Details
    Publication Date: 2024-02-01
    Description: Time-series of downward alkenone fluxes have been investigated at 200 m depth over a one year sediment trap experiment, in the Northwestern Mediterranean Sea. Alkenone flux maxima occurred in autumn and to a lesser extent in May, during the spring bloom. Temperature estimates calculated from the UK'37 index revealed that alkenone producers preferentially develop in subsurface waters (at about 50 m) in spring, whereas the autumn alkenone production occurred upper in the water column (around 30 m). Examination of the core-top UK'37 index values at various sites of the Northwestern Mediterranean basin, suggested that the spring bloom period do not significantly imprint the temperatures recorded in the sediments. The sedimentary temperature estimates would rather reflect annually integrated SST, with a major influence of the autumnal post-bloom development of the coccolithophores in the euphotic zone.
    Keywords: Biogeochemical Processes in the Oceans and Fluxes; DYF5; DYF6; DYF7; DYF8; DYF9; DYFAMED; JGOFS; Joint Global Ocean Flux Study; Marion Dufresne (1972); MD90-901; MD90-908; MEDAR/MEDATLAS; Mediterranean Data Archaeology and Rescue; Mediterranean Sea; PC; Piston corer; PROMETEI; PROOF; Time-series station; Trap; TRAP
    Type: Dataset
    Format: application/zip, 6 datasets
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  • 9
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    Alkenones, unsaturation index UK`37 at trap DYF16 (1999)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: Alkenone, unsaturation index UK'37; Biogeochemical Processes in the Oceans and Fluxes; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; DYF16; DYFAMED; JGOFS; Joint Global Ocean Flux Study; PROOF; Sample code/label; Time-series station; Trap; TRAP
    Type: Dataset
    Format: text/tab-separated-values, 100 data points
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  • 10
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    Alkenones, unsaturation index UK`37 at trap DYF17 (1999)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: Alkenone, unsaturation index UK'37; Biogeochemical Processes in the Oceans and Fluxes; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; DYF17; DYFAMED; JGOFS; Joint Global Ocean Flux Study; PROOF; Sample code/label; Time-series station; Trap; TRAP
    Type: Dataset
    Format: text/tab-separated-values, 52 data points
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