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  • 1990-1994  (16)
  • 1980-1984  (2)
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  • 1
    Monograph available for loan
    Monograph available for loan
    Carbon cycling in the glacial ocean : constraints on the ocean's role in global change ; quantitative approaches in paleoceanography (1994)
    Berlin : Springer
    Associated volumes
    Details Availability
    Call number: AWI G5-96-0326
    In: NATO ASI series : I, Global and environmental change, Vol. 17
    Type of Medium: Monograph available for loan
    Pages: XII, 580 Seiten , Illustrationen
    ISBN: 3540575944
    Series Statement: NATO ASI series : I, Global and environmental change 17
    URL: http://bvbr.bib-bvb.de:8991/exlibris/aleph/a22_1/apache_media/L6T6KYT1A33KF689QA8K2Y56N41KSN.pdf
    Language: English
    Note: TABLE OF CONTENTS FOREWORD LIST OF AUTHORS AND PARTICIPANTS I - OPERATION OF THE OCEAN-ATMOSPHERE CARBON CYCLE The recent state of carbon cycling through the atmosphere / I. Levin Glacial ocean carbon cycle modeling / Ch. Heinze Glacial-interglacial changes in continental weathering: possible implication for atmospheric CO2 / G. Munhoven and L.M.François II - VARIATIONS OF THE OCEANS CARBON RESERVOIR: FAUNAL VERSUS GEOCHEMCAL RECORDS The relationship between surface water masses, oceanographic fronts and paleoclimatic proxies in surface sediments of the Greenland, Iceland, Norwegian Seas / T. Johannessen, E. Jansen, A. Flatrøy, A. C. Ravelo. - Is there a relationship between atmospheric CO2 and manganese in the ocean? / A. Mangini, H.-J. Rutsch, M. Frank, A. Eisenhauer, J.-D. Eckhardt Benthic foraminiferal assemblages and the δ13C-signal in the Atlantic sector of the Southern Ocean: glacial-to-interglacial contrasts / A. Mackensen, H. Grobe, H.-W. Hubberten, G. Kuhn Foraminiferal population dynamics and stable carbon isotopes / Ch. Hemleben and J. Bijma A comparison of carbon isotopes and cadmium in the modern and glacial maximum ocean: can we account for the discrepancies? / E. A. Boyle Tracer-nutrient correlations in the upper ocean: observational and box model constraints on the use of benthic foraminiferal δ13C and Cd/Ca as paleo-proxies for the intermediate-depth ocean / R. Zahn and R. Keir IIΙ - GEOCHEMISTRY OF THE ORGANIC SEDIMENT FRACTION: CONSTRAINTS ON THE BIOLOGICAL CARBON PUMP Possible early diagenetic alteration of palaeo proxies / G.J. De Lange, B. Van Os, P.A. Pruysers, J.J. Middelburg, D. Castradori, P. Van Santvoort, P.J. Müller, H. Eggenkamp, F.G. Prahl Nitrogen isotope fractionation in the modern ocean: implications for the sedimentary record / J. P. Montoya The use of nitrogen isotopic ratio for reconstruction of past changes in surface ocean nutrient utilization / M.A. Altabet and R. Francois Variations in sedimentary organic δ13C as a proxy for past changes in ocean and atmospheric CO2 concentrations / G. H. Rau Reconstruction of paleoceanic PCO2 levels from carbon isotopic compositions of sedimentary biogenic components /J.P. Jasper and J.M. Hayes Late Quaternary PCO2 variations in the Angola Current: evidence from organic carbon δ13C and alkenone temperatures / P.J. Müller, R. Schneider, G. Ruhland PCO2 variations of equatorial surface water over the last 330,000 years: the δ13C record of organic carbon / L. Westerhausen, M. Sarnthein, U. Struck, H. Erlenkeuser, J. Poynter IV - GEOCHEMICAL AND MICROPALEONTOLOGICAL INDEXES OF PALEO-PRODUCTIVITY Paleoproductivity: flux proxies versus nutrient proxies and other problems concerning the Quaternary productivity record / W.H. Berger, J.C. Herguera, C.B. Lange, R. Schneider From modern flux to paleoflux: assessment from sinking assemblages to thanatocoenosis / K. Takahashi Late Quaternary paleoproductivity variations in the NE and equatorial Atlantic: diatom and Corg evidence / F. Abrantes, K. Winn, M. Sarnthein Glacial-Holocene paleoproductivity off western Australia: a comparison of proxy records / D.C. McCorkle, H. H. Veeh, D.J. Heggie Nutrient, mixing and export indices: A 250 Kyr paleoproductivity record from the western equatorial Pacific / J.C. Herguera Dinoflagellate cysts as paleoproductivity indicators: state of the art, potential, and limits / B. Dale and A. Fjeliså Deep-sea benthic foraminifers: food and bottom water masses / D. Schnitker The history of barium, biogenic silica and organic carbon accumulation in the Weddell Sea and Antarctic Ocean over the last 150,000 years / G. Shimmield, S. Derrick, A. Mackensen, H. Grobe, C. Pudsey SUBJECT INDEX
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 2
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    (Table 3) Stable carbon and oxygen isotope ratios of foraminifera in sediment core PAR87A-02 (1991)
    PANGAEA
    Details
    Publication Date: 2023-11-25
    Keywords: AGE; Cibicidoides spp., δ13C; Cibicidoides spp., δ18O; DEPTH, sediment/rock; GEOMAR; Globigerina bulloides, δ13C; Globigerina bulloides, δ18O; Gyroidinoides spp., δ13C; Gyroidinoides spp., δ18O; Helmholtz Centre for Ocean Research Kiel; Isotope ratio mass spectrometry; Neogloboquadrina pachyderma sinistral, δ13C; Neogloboquadrina pachyderma sinistral, δ18O; North Pacific; PAR87A-02; PC; Piston corer; Uvigerina spp., δ13C; Uvigerina spp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 262 data points
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  • 3
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    (Table 4) Stable carbon and oxygen isotope ratios of foraminifera in sediment core PAR87A-10 (1991)
    PANGAEA
    Details
    Publication Date: 2023-11-25
    Keywords: AGE; Cibicidoides spp., δ13C; Cibicidoides spp., δ18O; DEPTH, sediment/rock; GEOMAR; Globigerina bulloides, δ13C; Globigerina bulloides, δ18O; Gyroidinoides spp., δ13C; Gyroidinoides spp., δ18O; Helmholtz Centre for Ocean Research Kiel; Isotope ratio mass spectrometry; Neogloboquadrina pachyderma sinistral, δ13C; Neogloboquadrina pachyderma sinistral, δ18O; North Pacific; PAR87A-10; PC; Piston corer; Uvigerina spp., δ13C; Uvigerina spp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 204 data points
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  • 4
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    (Table 5) Age determination of sediment core PAR87A-10 (1991)
    PANGAEA
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    Publication Date: 2023-11-25
    Keywords: Age, 14C AMS; Age, 14C milieu/reservoir corrected; Age, calibrated; Age, dated; Age, dated, error to older; Age, dated, error to younger; Age, dated material; DEPTH, sediment/rock; GEOMAR; Helmholtz Centre for Ocean Research Kiel; North Pacific; PAR87A-10; PC; Piston corer
    Type: Dataset
    Format: text/tab-separated-values, 42 data points
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  • 5
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    Stable isotope record of foraminifera from the subarctic Pacific (1991)
    PANGAEA
    In:  Supplement to: Zahn, Rainer; Pedersen, Thomas F; Bornhold, Brian D; Mix, Alan C (1991): Water mass conversion in the glacial subarctic Pacific (54°N, 148°W): physical constraints and the benthic-planktonic stable isotope record. Paleoceanography, 6(5), 543-560, https://doi.org/10.1029/91PA01327
    Details
    Publication Date: 2023-11-25
    Description: Benthic (Uvigerina spp., Cibicidoides spp., Gyroidinoides spp.) and planktonic (N. pachyderma sinistral, G. bulloides) stable isotope records from three core sites in the central Gulf of Alaska are used to infer mixed-layer and deepwater properties of the late glacial Subarctic Pacific. Glacial-interglacial amplitudes of the planktonic delta18O records are 1.1-1.3 per mil, less than half the amplitude observed at core sites at similar latitudes in the North Atlantic; these data imply that a strong, negative deltaw anomaly existed in the glacial Subarctic mixed layer during the summer, which points to a much stronger low-salinity anomaly than exists today. If true, the upper water column in the North Pacific would have been statically more stable than today, thus suppressing convection even more efficiently. This scenario is further supported by vertical (i.e., planktic versus benthic) delta18O and delta13C gradients of 〉1 per mil, which suggest that a thermohaline link between Pacific deep waters and the Subarctic Pacific mixed layer did not exist during the late glacial. Epibenthic delta13C in the Subarctic Pacific is more negative than at tropical-subtropical Pacific sites but similar to that recorded at Southern Ocean sites, suggesting ventilation of the deep central Pacific from mid-latitude sources, e.g., from the Sea of Japan and Sea of Okhotsk. Still, convection to intermediate depths could have occurred in the Subarctic during the winter months when heat loss to the atmosphere, sea ice formation, and wind-driven upwelling of saline deep waters would have been most intense. This would be beyond the grasp of our planktonic records which only document mixed-layer temperature-salinity fields extant during the warmer seasons. Also we do not have benthic isotope records from true intermediate water depths of the Subarctic Pacific.
    Keywords: GEOMAR; Helmholtz Centre for Ocean Research Kiel; North Pacific; PAR87A-01; PAR87A-02; PAR87A-10; PC; Piston corer
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    Format: application/zip, 4 datasets
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  • 6
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    (Table 2) Stable carbon and oxygen isotope ratios of foraminifera in sediment core PAR87A-01 (1991)
    PANGAEA
    Details
    Publication Date: 2023-11-25
    Keywords: AGE; Cibicidoides spp., δ13C; Cibicidoides spp., δ18O; DEPTH, sediment/rock; GEOMAR; Globigerina bulloides, δ13C; Globigerina bulloides, δ18O; Gyroidinoides spp., δ13C; Gyroidinoides spp., δ18O; Helmholtz Centre for Ocean Research Kiel; Isotope ratio mass spectrometry; Neogloboquadrina pachyderma sinistral, δ13C; Neogloboquadrina pachyderma sinistral, δ18O; North Pacific; PAR87A-01; PC; Piston corer; Uvigerina spp., δ13C; Uvigerina spp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 170 data points
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  • 7
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    Stable carbon and nitrogen isotope composition of organic matter in sediments of the Oman Margin (1991)
    PANGAEA
    In:  Supplement to: Muzuka, Alfred N N; Macko, Stephen A; Pedersen, Thomas F (1991): Stable carbon and nitrogen isotope compositions of organic matter from Sites 724 and 725, Oman Margin. In: Prell, WL; Niitsuma, N; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 117, 571-586, https://doi.org/10.2973/odp.proc.sr.117.163.1991
    Details
    Publication Date: 2024-01-09
    Description: Stable isotopic compositions of carbon and nitrogen and organic carbon content of sediments ranging from the Pliocene to the Pleistocene-Holocene in age from the Oman Margin (ODP Sites 724 and 725) are reported. In general, the organic carbon content is greater than 2% at Site 724. Prior to the Pleistocene-Holocene at this site, sediments with higher content of organic matter were deposited owing to favorable preservation conditions and/or higher productivity. In the Pleistocene, lower amounts of organic matter have been preserved; this material generally has more enriched nitrogen isotopic compositions. This may indicate intensification of the Oxygen Minimum Zone and denitrification with the onset of the Pleistocene. A correlation of carbon isotope content of these sediments with oxygen isotope stages at Site 724 indicates an enrichment in 13C during glacial events. Based on the stable isotope evidence of both carbon and nitrogen, there does not appear to be major input of terrigenous-derived allochthonous material in this marine environment. The timing and extent of monsoon winds on the productivity of this region are not evident, but require further studies for collaborative interpretation of small-scale features in the isotopic and carbon content of this environment.
    Keywords: 117-724C; 117-725C; Arabian Sea; DRILL; Drilling/drill rig; Joides Resolution; Leg117; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 8
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    Chemistry of interstitial waters of ODP Leg 117 samples (Table 1) (1991)
    PANGAEA
    In:  Supplement to: Pedersen, Thomas F; Shimmield, Graham (1991): Interstitial water chemistry, Leg 117: contrasts with the Peru margin. In: Prell, WL; Niitsuma, N; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 117, 499-513, https://doi.org/10.2973/odp.proc.sr.117.152.1991
    Details
    Publication Date: 2024-01-09
    Description: Interstitial water analyses made at 12 sites during Leg 117 are used to define the nature of diagenetic reactions in organic-rich sediments on the Owen Ridge and Oman Margin. Minor variations in chloride concentration profiles are ascribed to past changes in bottom water salinity at two mid-depth margin sites and to upward migration of low salinity water at another. There is no evidence for subsurface brine movement, unlike the case on the Peru Margin. Dolomitization is widespread and accounts for the depletions of magnesium observed in pore waters at variable depths at nearly all sites. The mineral occurs both as disseminated euhedral limpid crystals and, in at least one location, in massive stringers. Formation of the latter is suggested to reflect precipitation during sea level transgressions when the sedimentation rate was low, but when productivity was high. Authigenic carbonate fluorapatite is also widespread, the phosphorus being derived from the breakdown of organic matter. Sulfate is quantitatively depleted at depth at most locations but the rate of depletion is markedly less than that observed on the Peru Margin where sedimentation is also similarly influenced by high rates of upwelling. The reason for this contrast is not clear and merits further investigation.
    Keywords: 117-720A; 117-721; 117-722; 117-723; 117-724; 117-725A; 117-725B; 117-725C; 117-726A; 117-727A; 117-728; 117-729A; 117-730A; 117-731A; 117-731B; 117-731C; Alkalinity, total; Ammonium; Arabian Sea; Calcium; Carbon, organic, dissolved; Chloride; COMPCORE; Composite Core; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg117; Magnesium; Magnesium/Calcium ratio; Ocean Drilling Program; ODP; pH; Phosphate; Salinity; Sample code/label; Silicon dioxide; Sulfate
    Type: Dataset
    Format: text/tab-separated-values, 2195 data points
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  • 9
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    (Appendix B) Density and organic carbon concentration and accumulation of ODP Hole 117-724C (1991)
    PANGAEA
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    Publication Date: 2024-01-09
    Keywords: 117-724C; Accumulation rate, total organic carbon; AGE; Arabian Sea; Calculated; Carbon, organic, total; Density, dry bulk; Density, wet bulk; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Element analyser CNS, Carlo Erba NA1500; Gamma-ray attenuation porosity evaluator (GRAPE); Joides Resolution; Leg117; Ocean Drilling Program; ODP; Sample code/label; Sedimentation rate
    Type: Dataset
    Format: text/tab-separated-values, 962 data points
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  • 10
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    (Table 1) Stable isotope organic geochemistry of ODP Hole 117-725C (1991)
    PANGAEA
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    Publication Date: 2024-01-09
    Keywords: 117-725C; Arabian Sea; Carbon, organic, total; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg117; Mass spectrometer VG Micromass Prism; Ocean Drilling Program; ODP; Sample code/label; δ13C, organic carbon; δ15N, organic matter
    Type: Dataset
    Format: text/tab-separated-values, 496 data points
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