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  • Data  (32)
  • 2020-2024  (16)
  • 1995-1999  (16)
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  • 11
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    Coccolith_carbonate species fluxes and environmental data from sediment trap sites CB, M1U, M2U and M4U across the tropical North Atlantic (2012-2014) (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Data refer to export fluxes of carbonate produced by calcifying phytoplankton (coccolithophores), and coccolith-CaCO₃ percent contribution to total carbonate flux across the tropical North Atlantic, from upwelling affected NW Africa, via three ocean sites along 12°N to the Caribbean. Sampling was undertaken by means of a spatial array of four time-series sediment traps (i.e., CB at 21°N 20°W; M1U at 12°N 23°W; M2U at 14°N 37°W; M4U at 12°N 49°W; Guerreiro et al., 2021) collecting particle fluxes in two-week intervals, from October 2012 to February 2014, allowing to track temporal changes along the southern margin of the North Atlantic central gyre. Auxiliary PIC (Particulate Inorganic Carbon) data from NASA's Ocean Biology Processing Group (https://oceancolor.gsfc.nasa.gov) are also provided for the sediment sampling period at all four trap sites. Particle flux data (mg/m²/d) of CaCO₃, organic matter, particulate organic carbon (POC), biogenic silica (bSiO₂) and unspecified residual fraction are provided for sediment trap site CB.
    Keywords: coccolith-CaCO₃; Coccolithophores; particle fluxes; PIC/POC; Sediment traps; TRAFFIC; Trophic Transfer Efficiency in the Benguela Current; Tropical North Atlantic
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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  • 12
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    Coccolith carbonate species fluxes and environmental data from sediment trap sites M1U (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Keywords: 13M1; 64PE378_13M1-3; Calcidiscus leptoporus; Calcidiscus leptoporus, flux; Carbon, inorganic, particulate; coccolith-CaCO₃; Coccolithophores; Coccolithophoridae, carbon, flux; Coccoliths, other; Coccoliths, total; DATE/TIME; Date/time end; Date/time start; Emiliania huxleyi; Emiliania huxleyi, flux; Florisphaera profunda; Florisphaera profunda, flux; Gephyrocapsa ericsonii; Gephyrocapsa ericsonii, flux; Gephyrocapsa muellerae; Gephyrocapsa muellerae, flux; Gephyrocapsa oceanica; Gephyrocapsa oceanica, flux; Gladiolithus flabellatus; Gladiolithus flabellatus, flux; Helicosphaera spp.; Helicosphaera spp., flux; Mooring (long time); MOORY; particle fluxes; PIC/POC; Reticulofenestra sessilis; Reticulofenestra sessilis, flux; Rhabdosphaera spp.; Rhabdosphaera spp., flux; Sample code/label; Season; Sediment traps; South Atlantic Ocean; Sum; TRAFFIC; Trophic Transfer Efficiency in the Benguela Current; Tropical North Atlantic; Umbellosphaera spp.; Umbellosphaera spp., flux; Umbilicosphaera spp.; Umbilicosphaera spp., flux
    Type: Dataset
    Format: text/tab-separated-values, 1078 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 13
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    Planktonic foraminifera shell size from sediment traps Cape Blanc-3 and Cape Blanc-18 (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: We present the first analysis of the relative contribution of variability in shell flux, shell size, and calcification intensity (weight/size) in individual species to the total calcite flux by the planktonic foraminifera community on intra-annual (seasonal) and interannual timescales. We investigated the export flux of planktonic foraminifera in two one-year sediment trap time series from the Northeastern Atlantic Ocean and placed the observed variability of shell flux, shell size, and calcification intensity of each species in the context of the resulting calcite flux. For this issue, we selected 1990-1991 (Cape Blanc-3) and 2007-2008 (Cape Blanc-18) time series from the Cape Blanc upwelling area. Each of these deployments covered an entire year continuously, with an average sampling resolution of ~20 days. Here, we provide the data concerning the species individual size during the studied time series, which were picked from size fractions 〉 150 µm.
    Keywords: Aperture size; Area; Cape Blanc; CB18; CB18_trap; CB3_trap; Center for Marine Environmental Sciences; DATE/TIME; DEPTH, water; Diameter, maximum; Diameter, minimum; Duration, number of days; Elevation of event; Event label; Latitude of event; Longitude of event; M12/1; Maria S. Merian; MARUM; Meteor (1986); MOOR; Mooring; MSM04/4b; northeaster; Northeastern Atlantic; Perimeter; Planktonic foraminifera; Sample code/label; sediment trap; Shell size; Species; time-series; Trap; TRAP
    Type: Dataset
    Format: text/tab-separated-values, 187800 data points
    Location Call Number Limitation Availability
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  • 14
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    Stable carbon and oxygen isotope ratios of Globorotalia truncatulinoides of sediment core GeoB1523-1 (1996)
    PANGAEA
    Details
    Publication Date: 2024-06-25
    Keywords: Amazon Fan; DEPTH, sediment/rock; GeoB; GeoB1523-1; Geosciences, University of Bremen; Globorotalia truncatulinoides, δ13C; Globorotalia truncatulinoides, δ18O; Gravity corer (Kiel type); M16/2; Mass spectrometer Finnigan MAT 251; Meteor (1986); SL
    Type: Dataset
    Format: text/tab-separated-values, 294 data points
    Location Call Number Limitation Availability
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  • 15
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    Stable carbon and oxygen isotope ratios of planktonic foraminifera of sediment core GeoB1523-2 (1996)
    PANGAEA
    Details
    Publication Date: 2024-06-25
    Keywords: Amazon Fan; DEPTH, sediment/rock; GeoB; GeoB1523-2; Geosciences, University of Bremen; Giant box corer; GKG; Globigerinoides ruber pink, δ13C; Globigerinoides ruber pink, δ18O; Globigerinoides sacculifer, δ13C; Globigerinoides sacculifer, δ18O; Globorotalia crassaformis, δ13C; Globorotalia crassaformis, δ18O; Globorotalia truncatulinoides, δ13C; Globorotalia truncatulinoides, δ18O; M16/2; Mass spectrometer Finnigan MAT 251; Meteor (1986)
    Type: Dataset
    Format: text/tab-separated-values, 88 data points
    Location Call Number Limitation Availability
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  • 16
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    Calculated sea surface temperatures of two sediment cores (1999)
    PANGAEA
    In:  Supplement to: Wefer, Gerold; Berger, Wolfgang H; Bijma, Jelle; Fischer, Gerhard (1999): Clues to Ocean History: a brief overview of proxies. In: Fischer, G & Wefer, G (eds.), Use of Proxies in Paleoceanography - Examples from the South Atlantic, Springer, Berlin, Heidelberg, 1-68, https://doi.org/10.1007/978-3-642-58646-0_1
    Details
    Publication Date: 2024-07-01
    Description: The reconstruction of ocean history employs a large variety of methods with origins in the biological, chemical, and physical sciences, and uses modern statistical techniques for the interpretation of extensive and complex data sets. Various sediment properties deliver useful information for reconstructing environmental parameters. Those properties that have a close relationship to environmental parameters are called ''proxy variables'' (''proxies'' for short). Proxies are measurable descriptors for desired (but unobservable) variables. Surface water temperature is probably the most important parameter for describing the conditions of past oceans and is crucial for climate modelling. Proxies for temperature are: abundance of microfossils dwelling in surface waters, oxygen isotope composition of planktic foraminifers, the ratio of magnesium or strontium to calcium in calcareous shells or the ratio of certain organic molecules (e.g. alkenones produced by coccolithophorids). Surface water salinity, which is important in modelling of ocean circulation, is much more difficult to reconstruct. At present there is no established method for a direct determination of this parameter. Measurements associated with the paleochemistry of bottom waters to reconstruct bottom water age and flow are made on benthic foraminifers, ostracodes, and deep-sea corals. Important geochemical tracers are d13C and Cd/Ca ratios. When using benthic foraminifers, knowledge of the sediment depth habitat of species is crucial. Reconstructions of productivity patterns are of great interest because of important links to current patterns, mixing of water masses, wind, the global carbon cycle, and biogeography. Productivity is reflected in the flux of carbon into the sediment. There are a number of fluxes other than those of organic carbon that can be useful in assessing productivity fluctuations. Among others, carbonate and opal flux have been used, as well as particulate barite. Furthermore, microfossil assemblages contain clues to the intensity of production as some species occur preferentially in high-productivity regions while others avoid these. One marker for the fertility of sub-surface waters (that is, nutrient availability) is the carbon isotope ratio within that water (13C/12C, expressed as d13C). Carbon isotope ratios in today's ocean are negatively correlated with nitrate and phosphate contents. Another tracer of phosphate content in ocean waters is the Cd/Ca ratio. The correlation between this ratio and phosphate concentrations is quite well documented. A rather new development to obtain clues on ocean fertility (nitrate utilization) is the analysis of the 15N/14N ratio in organic matter. The fractionation dynamics are analogous to those of carbon isotopes. These various ratios are captured within the organisms growing within the tagged water. A number of reconstructions of the partial pressure of CO2 have been attempted using d13C differences between planktic and benthic foraminifers and d13C values of bulk organic material or individual organic components. To define the carbon system in sea water, two elements of the system have to be known in addition to temperature. These can be any combination of total CO2 , alkalinity, or pH. To reconstruct pH, the boron isotope composition of carbonates has been used. Ba patterns have been used to infer the distribution of alkalinity in past oceans. Information relating to atmospheric circulationand climate is transported to the ocean by wind or rivers, in the form of minerals or as plant andanimal remains. The most useful tracers in this respect are silt-sized particles and pollen.
    Keywords: Equatorial Atlantic; GeoB; GeoB1105-3; GeoB1105-4; GeoB1112-4; Geosciences, University of Bremen; Giant box corer; GKG; Gravity corer (Kiel type); M9/4; Meteor (1986); SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 17
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    Coccolith carbonate species fluxes and environmental data from sediment trap site M4U (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Calcidiscus leptoporus; Calcidiscus leptoporus, flux; Carbon, inorganic, particulate; coccolith-CaCO₃; Coccolithophores; Coccolithophoridae, carbon, flux; Coccoliths, other; Coccoliths, total; DATE/TIME; Date/time end; Date/time start; Emiliania huxleyi; Emiliania huxleyi, flux; Florisphaera profunda; Florisphaera profunda, flux; Gephyrocapsa ericsonii; Gephyrocapsa ericsonii, flux; Gephyrocapsa muellerae; Gephyrocapsa muellerae, flux; Gephyrocapsa oceanica; Gephyrocapsa oceanica, flux; Gladiolithus flabellatus; Gladiolithus flabellatus, flux; Helicosphaera spp.; Helicosphaera spp., flux; M4U; M89; M89_1544_M4-4_U; Meteor (1986); particle fluxes; PIC/POC; Reticulofenestra sessilis; Reticulofenestra sessilis, flux; Rhabdosphaera spp.; Rhabdosphaera spp., flux; Sample code/label; Season; Sediment traps; South Atlantic Ocean; Sum; TRAFFIC; Trap, sediment; TRAPS; Trophic Transfer Efficiency in the Benguela Current; Tropical North Atlantic; Umbellosphaera spp.; Umbellosphaera spp., flux; Umbilicosphaera spp.; Umbilicosphaera spp., flux
    Type: Dataset
    Format: text/tab-separated-values, 1035 data points
    Location Call Number Limitation Availability
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  • 18
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    Coccolith carbonate species fluxes and environmental data from sediment trap site M2U (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Calcidiscus leptoporus; Calcidiscus leptoporus, flux; Carbon, inorganic, particulate; coccolith-CaCO₃; Coccolithophores; Coccolithophoridae, carbon, flux; Coccoliths, other; Coccoliths, total; DATE/TIME; Date/time end; Date/time start; Emiliania huxleyi; Emiliania huxleyi, flux; Florisphaera profunda; Florisphaera profunda, flux; Gephyrocapsa ericsonii; Gephyrocapsa ericsonii, flux; Gephyrocapsa muellerae; Gephyrocapsa muellerae, flux; Gephyrocapsa oceanica; Gephyrocapsa oceanica, flux; Gladiolithus flabellatus; Gladiolithus flabellatus, flux; Helicosphaera spp.; Helicosphaera spp., flux; M2U; M89; M89_1532_M2-3_U; Meteor (1986); particle fluxes; PIC/POC; Reticulofenestra sessilis; Reticulofenestra sessilis, flux; Rhabdosphaera spp.; Rhabdosphaera spp., flux; Sample code/label; Season; Sediment traps; South Atlantic Ocean; Sum; TRAFFIC; Trap, sediment; TRAPS; Trophic Transfer Efficiency in the Benguela Current; Tropical North Atlantic; Umbellosphaera spp.; Umbellosphaera spp., flux; Umbilicosphaera spp.; Umbilicosphaera spp., flux
    Type: Dataset
    Format: text/tab-separated-values, 1034 data points
    Location Call Number Limitation Availability
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  • 19
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    Planktonic foraminifera counts and shell weight from sediment traps Cape Blanc-3 and Cape Blanc-18 (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: We present the first analysis of the relative contribution of variability in shell flux, shell size, and calcification intensity (weight/size) in individual species to the total calcite flux by the planktonic foraminifera community on intra-annual (seasonal) and interannual timescales. We investigated the export flux of planktonic foraminifera in two one-year sediment trap time series from the Northeastern Atlantic Ocean and placed the observed variability of shell flux, shell size, and calcification intensity of each species in the context of the resulting calcite flux. For this issue, we selected 1990-1991 (Cape Blanc-3) and 2007-2008 (Cape Blanc-18) time series from the Cape Blanc upwelling area. Each of these deployments covered an entire year continuously, with an average sampling resolution of ~20 days. Here, we provide the data concerning the species counts and shell weight, picked from size fractions 〉 150 µm, captured during the studied time series. Shell mass error was calculated as the standard deviation of the measurements divided by the square root of number of measurements, divided by the number of the weighed specimens.
    Keywords: Aperture size; Beella digitata; Beella digitata, shell, weight; Beella digitata, shell, weight, standard deviation; Calcium carbonate, flux; Cape Blanc; CB18; CB18_trap; CB3_trap; Center for Marine Environmental Sciences; Date/time end; Date/time start; Dentigloborotalia anfracta; Dentigloborotalia anfracta, shell, weight; Dentigloborotalia anfracta, shell, weight, standard deviation; DEPTH, water; Duration, number of days; Elevation of event; Event label; fluxes; Foraminifera, planktic, flux; Globigerina bulloides; Globigerina bulloides, shell, weight; Globigerina bulloides, shell, weight, standard deviation; Globigerina falconensis; Globigerina falconensis, shell, weight; Globigerina falconensis, shell, weight, standard deviation; Globigerinella calida; Globigerinella calida, shell, weight; Globigerinella calida, shell, weight, standard deviation; Globigerinella siphonifera; Globigerinella siphonifera, shell, weight; Globigerinella siphonifera, shell, weight, standard deviation; Globigerinita glutinata; Globigerinita glutinata, shell, weight; Globigerinita glutinata, shell, weight, standard deviation; Globigerinoides conglobatus; Globigerinoides conglobatus, shell, weight; Globigerinoides elongatus; Globigerinoides elongatus, shell, weight; Globigerinoides elongatus, shell, weight, standard deviation; Globigerinoides ruber albus; Globigerinoides ruber albus, shell, weight; Globigerinoides ruber albus, shell, weight, standard deviation; Globigerinoides ruber ruber; Globigerinoides ruber ruber, shell, weight; Globigerinoides ruber ruber, shell, weight, standard deviation; Globigerinoides tenellus; Globigerinoides tenellus, shell, weight; Globigerinoides tenellus, shell, weight, standard deviation; Globorotalia crassaformis; Globorotalia crassaformis, shell, weight; Globorotalia crassaformis, shell, weight, standard deviation; Globorotalia hirsuta; Globorotalia hirsuta, shell, weight; Globorotalia hirsuta, shell, weight, standard deviation; Globorotalia inflata; Globorotalia inflata, shell, weight; Globorotalia inflata, shell, weight, standard deviation; Globorotalia menardii; Globorotalia menardii, shell, weight; Globorotalia menardii, shell, weight, standard deviation; Globorotalia scitula; Globorotalia scitula, shell, weight; Globorotalia scitula, shell, weight, standard deviation; Globorotalia truncatulinoides; Globorotalia truncatulinoides, shell, weight; Globorotalia truncatulinoides, shell, weight, standard deviation; Globorotalia tumida; Globorotalia tumida, shell, weight; Globorotalia tumida, shell, weight, standard deviation; Globorotalia ungulata; Globorotalia ungulata, shell, weight; Globorotalia ungulata, shell, weight, standard deviation; Hastigerina pelagica; Hastigerina pelagica, shell, weight; Hastigerina pelagica, shell, weight, standard deviation; Latitude of event; Longitude of event; M12/1; Maria S. Merian; MARUM; Meteor (1986); MOOR; Mooring; MSM04/4b; Neogloboquadrina dutertrei; Neogloboquadrina dutertrei, shell, weight; Neogloboquadrina dutertrei, shell, weight, standard deviation; Neogloboquadrina incompta; Neogloboquadrina incompta, shell, weight; Neogloboquadrina incompta, shell, weight, standard deviaton; northwest Africa; Orbulina universa; Orbulina universa, shell, weight; Orbulina universa, shell, weight, standard deviation; Planktonic foraminifera; Pteropoda, flux; Pulleniatina obliquiloculata; Pulleniatina obliquiloculata, shell, weight; Pulleniatina obliquiloculata, shell, weight, standard deviation; Sample code/label; sediment trap; shell weight; Sphaeroidinella dehiscens; Sphaeroidinella dehiscens, shell, weight; Sphaeroidinella dehiscens, shell, weight, standard deviation; Split; Tenuitella fleisheri; Tenuitella fleisheri, shell, weight; Tenuitella fleisheri, shell, weight, standard deviation; time-series; Trap; TRAP; Trilobatus sacculifer; Trilobatus sacculifer, shell, weight; Trilobatus sacculifer, shell, weight, standard deviation; Turborotalita humilis; Turborotalita humilis, shell, weight; Turborotalita humilis, shell, weight, standard deviation; Turborotalita quinqueloba; Turborotalita quinqueloba, shell, weight; Turborotalita quinqueloba, shell, weight, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 2757 data points
    Location Call Number Limitation Availability
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  • 20
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    Stable carbon and oxygen isotope ratios of planktonic foraminifera of sediment core GeoB1032 (1996)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Angola Basin; DEPTH, sediment/rock; Event label; GeoB; GeoB1032-2; GeoB1032-3; Geosciences, University of Bremen; Giant box corer; GKG; Globigerinoides ruber white, δ13C; Globigerinoides ruber white, δ18O; Globorotalia inflata, δ13C; Globorotalia inflata, δ18O; Globorotalia truncatulinoides sinistral, δ13C; Globorotalia truncatulinoides sinistral, δ18O; Gravity corer (Kiel type); M6/6; Mass spectrometer Finnigan MAT 251; Meteor (1986); SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Walvis Ridge
    Type: Dataset
    Format: text/tab-separated-values, 780 data points
    Location Call Number Limitation Availability
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