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  • PANGAEA  (62)
  • Oxford Univ. Press  (2)
  • AGU (American Geophysical Union)  (1)
Document type
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Years
  • 1
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    Abundance, encystment and sedimentation of acantharia during Autumn in the East Greenland Sea (1993)
    Oxford Univ. Press
    In:  Journal of Plankton Research, 15 (1). pp. 99-114.
    Details
    Publication Date: 2018-05-30
    Description: The abundance and sedimentation of acantharia and their cysts was recorded in the water column and sediment traps in the East Greenland Sea in August-September 1990. Although acantharia constituted 〈1% of total suspended particulate organic carbon (POC) in the water column, up to 90% (average 55%) of the POC sedimenting in 100 m was present in the form of acantharian cysts during a 9 day drift experiment. Rapid dissolution of strontium sulphate, of which their shells and spines are constructed, was evidenced by their disappearance with depth in the water column, maximum dissolution occurring between 500 and 1000 m water depth. Mass encystment and sedimentation of this single group of sarcodine protozoa can have dramatic effects on, the measurement of particulate fluxes in the open ocean, and may be a recurrent phenomenon in the eastern North Atlantic.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1093/plankt/15.1.99
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Basin-wide particulate carbon flux in the Atlantic Ocean: regional export patterns and potential for atmospheric CO2 sequestration (2001)
    AGU (American Geophysical Union)
    In:  Global Biogeochemical Cycles, 15 (4). pp. 845-862.
    Details
    Publication Date: 2018-03-15
    Description: Particle flux data from 27 sites in the Atlantic Ocean have been compiled in order to determine regional variations in the strength and efficiency of the biological pump and to quantify carbon fluxes over the ocean basin, thus estimating the potential oceanic sequestration of atmospheric CO2. An algorithm is derived relating annual particulate organic carbon (POC) flux to primary production and depth that yields variations in the export ratio (ER = POC flux/primary production) at 125 m of between 0.08 and 0.38 over the range of production from 50 to 400 g C m−2 yr−1. Significant regional differences in changes of the export ratio with depth are related to the temporal stability of flux. Sites with more pulsed export have higher export ratios at 125 m but show more rapid decreases of POC flux with depth, resulting in little geographic variation in fluxes below ∼3000 m. The opposing effects of organic carbon production and calcification on ΔpCO2 of surface seawater are considered to calculate an “effective carbon flux” at the depth of the euphotic zone and at the base of the winter mixed layer. POC flux at the base of the euphotic zone integrated over the Atlantic Ocean between 65°N and 65°S amounts to 3.14 Gt C yr−1. Of this, 5.7% is remineralized above the winter mixed layer and thus does not contribute to CO2 sequestration on climatically relevant timescales. The effective carbon flux, termed Jeff, amounts to 2.47 Gt C yr−1 and is a measure of the potential sequestration of atmospheric CO2 for the area considered. A shift in the composition of sedimenting particles (seen in a decrease of the opal:carbonate ratio) is seen across the entire North Atlantic, indicating a basin-wide phenomenon that may be related to large-scale changes in climatic forcing.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1029/2000GB001376
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Clearance of picoplankton-sized particles and formation of rapidly sinking aggregates by the euthecosomatous pteropod, Limacina retriversa (1997)
    Oxford Univ. Press
    In:  Journal of Plankton Research, 19 (7). pp. 863-875.
    Details
    Publication Date: 2018-05-30
    Description: Findings from experiments showed that the web-feeding euthecosomatous pteropod, Limacina retroversa, can produce rapidly sinking, mucous aggregates. It is suggested that, by adhesion, these aggregates scavenged picoplankton-sized particles, which were thus effectively cleared from the medium. In contrast, Calanus finmarchicusw as not able to clear these particles in our experiments. Sedimentation velocities of 10 aggregates measured in vivo were up to 1000 m day1, with an average of —300 m day-1 (not including two aggegates with neutral buoyancy). Mean velocities measured for feces of C.finmarchicus, Calanus hyperboreus and Thysanoessa sp. were considerably lower. We suggest that the sedimentation of L.retroversa aggregates was the source of mucous floes collected in sediment traps (Bathmann et al., Deep-Sea Res., 38,1341-1360,1991) and at the sea floor at 1200 m depth in the southern Norwegian Sea. This process may be an important mediator of sedimentation to the deep sea, when these pteropods are present in surface waters in large abundance.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1093/plankt/19.7.863
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Particle Flux of SEEP-10_trap (2003)
    PANGAEA
    Details
    Publication Date: 2023-03-10
    Keywords: Calculated; Calculated, see reference(s); Carbon, inorganic, particulate, flux; Carbon, organic, particulate, flux; DEPTH, water; Duration, number of days; Element analyser CHN; Lithogenic, flux; Opal, extraction; Mortlock & Froelich, 1989; Opal, flux; Reference/source; SEEP-10; SEEP-10_trap; South Atlantic Ocean; Total, flux per year; Trap, sediment; TRAPS
    Type: Dataset
    Format: text/tab-separated-values, 7 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Particle fluxes of SEEP-7_trap (2003)
    PANGAEA
    Details
    Publication Date: 2023-03-10
    Keywords: Calculated; Calculated, see reference(s); Carbon, inorganic, particulate, flux; Carbon, organic, particulate, flux; DEPTH, water; Duration, number of days; Element analyser CHN; Lithogenic, flux; Opal, extraction; Mortlock & Froelich, 1989; Opal, flux; Reference/source; SEEP-7; SEEP-7_trap; South Atlantic Ocean; Total, flux per year; Trap, sediment; TRAPS
    Type: Dataset
    Format: text/tab-separated-values, 7 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Particle fluxes from sediment trap KG1 (2006)
    PANGAEA
    Details
    Publication Date: 2023-02-24
    Keywords: ANT-III/2; Calcium carbonate, flux; Calculated; Carbon, organic, particulate, flux; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; GeoB; Geosciences, University of Bremen; KG1_trap; Nitrogen, total, flux; Opal, flux; Polarstern; PS06; Silicon Cycling in the World Ocean; SINOPS; Total mass, flux per day; Trap; TRAP
    Type: Dataset
    Format: text/tab-separated-values, 135 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Particle fluxes from sediment trap KG2 (2006)
    PANGAEA
    Details
    Publication Date: 2023-02-24
    Keywords: ANT-IV/2; Calculated; Carbon, organic, particulate, flux; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; GeoB; Geosciences, University of Bremen; KG2_trap; Opal, flux; Polarstern; PS08; Silicon Cycling in the World Ocean; SINOPS; Total mass, flux per day; Trap; TRAP
    Type: Dataset
    Format: text/tab-separated-values, 51 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Particle fluxes from sediment trap KG3 (2006)
    PANGAEA
    Details
    Publication Date: 2023-02-24
    Keywords: ANT-IV/3; Calculated; Carbon, organic, particulate, flux; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; GeoB; Geosciences, University of Bremen; KG3_trap; Opal, flux; Polarstern; PS08; Silicon Cycling in the World Ocean; SINOPS; Total mass, flux per day; Trap; TRAP
    Type: Dataset
    Format: text/tab-separated-values, 57 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Particle fluxes from sediment trap KN1 (2006)
    PANGAEA
    Details
    Publication Date: 2023-02-24
    Keywords: ANT-IV/3; Calculated; Carbon, organic, particulate, flux; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; GeoB; Geosciences, University of Bremen; KN1_trap; Nitrogen, total, flux; Opal, flux; Polarstern; PS08; Silicon Cycling in the World Ocean; SINOPS; Total mass, flux per day; Trap; TRAP
    Type: Dataset
    Format: text/tab-separated-values, 118 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Particle fluxes from sediment trap WR4 (2006)
    PANGAEA
    Details
    Publication Date: 2023-02-24
    Keywords: Calcium carbonate, flux; Calculated; Carbon, organic, particulate, flux; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; GeoB; Geosciences, University of Bremen; Nitrogen, total, flux; Opal, flux; Silicon Cycling in the World Ocean; SINOPS; Total mass, flux per day; Trap; TRAP; Walvis Ridge, Southeast Atlantic Ocean; WR4_trap
    Type: Dataset
    Format: text/tab-separated-values, 140 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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