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  • Nature Publishing Group  (9)
  • Pergamon Press  (2)
  • American Association for the Advancement of Science  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Palaeoceanography: Biomarkers for ancient climates (1986)
    [s.l.] : Nature Publishing Group
    Nature 320 (1986), S. 107-108 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] ENVIRONMENTAL conditions of growth, particularly ocean temperature, are faith-fully recorded by the coccolithophorids - widely distributed marine phytoplankton. The record lies in the relative abundance of long-chain alkenones - complex orga-nic molecules of the lipid bilayer which control the ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/320107a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Effects of microbe activity (1988)
    [s.l.] : Nature Publishing Group
    Nature 333 (1988), S. 17-18 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] ORGANIC matter exists in many forms in the oceans - as detritus and microbes, which can be suspended or sinking, and also as dissolved organic matter. The way these pools interact is influenced by, and influences, the distribution of nutrients and oxygen dissolved in the water column. One point of ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/333017a0
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  • 3
    Digitale Medien
    Digitale Medien
    Fluxes of biogenic components from sediment trap deployment in circumpolar waters of the Drake Passage (1982)
    [s.l.] : Nature Publishing Group
    Nature 299 (1982), S. 145-147 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Results are from the first deployment of sediment traps in Antarctic waters. Our traps, with a collection area of 314 cm2 (ref. 14), were attached to a moored array located at 6054.6' S and 5706.0' W in 3,625 m of water depth for 52 days from 2 December 1980 to 25 January 1981. During that time the ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/299145a0
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  • 4
    Digitale Medien
    Digitale Medien
    Particulate organic carbon flux in the oceans—surface productivity and oxygen utilization (1980)
    [s.l.] : Nature Publishing Group
    Nature 288 (1980), S. 260-263 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The relationship is based on flux data compiled from particle traps installed throughout the world's oceans7'19 by many investigators and from annual mean organic carbon production rates of the respective surface waters20"29 (Table 1). In a few cases biological production rates were determined at ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/288260a0
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  • 5
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    Palaeoceanography: Biomarkers for ancient climates (1986)
    Nature Publishing Group
    In:  Nature, 320 (6058). pp. 107-108.
    Details
    Publikationsdatum: 2016-03-01
    Materialart: Article , PeerReviewed
    Format: text
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    ARTIKEL (OCEANREP)
  • 6
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    Particulate organic carbon flux in the oceans-surface productivity and oxygen utilization (1980)
    Nature Publishing Group
    In:  Nature, 288 (5788). pp. 260-263.
    Details
    Publikationsdatum: 2016-03-01
    Beschreibung: Organic detritus passing from the sea surface through the water column to the sea floor controls nutrient regeneration, fuels benthic life and affects burial of organic carbon in the sediment record. Particle trap systems have enabled the first quantification of this important process. The results suggest that the dominant mechanism of vertical transport is by rapid settling of rare large particles, most likely of faecal pellets or marine snow of the order of 〉200 μm in diameter, whereas the more frequent small particles have an insignificant role in vertical mass flux4–6. The ultimate source of organic detritus is biological production in surface waters of the oceans. I determine here an empirical relationship that predicts organic carbon flux at any depth in the oceans below the base of the euphotic zone as a function of the mean net primary production rate at the surface and depth-dependent consumption. Such a relationship aids in estimating rates of decay of organic matter in the water column, benthic and water column respiration of oxygen in the deep sea and burial of organic carbon in the sediment record.
    Materialart: Article , PeerReviewed
    Format: text
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  • 7
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    3He in the Bransfield Strait waters: indication for local injection from back-arc rifting (1988)
    Pergamon Press
    In:  Deep Sea Research Part A: Oceanographic Research Papers, 35 (12). pp. 1919-1935.
    Details
    Publikationsdatum: 2020-08-04
    Beschreibung: Helium data from the waters of the Bransfield Strait, the southern Drake Passage and the northwestern shelf of the Weddell Sea are presented. The 3He profiles from the eastern and central basins of the Bransfield Strait show maxima (δ3He ≈ 7%) below the sill depths that separate the strait from the surrounding open ocean. The 3He excess is interpreted as a local injection of a 3He-rich helium component into the deep waters of the Bransfield Strait from backarc rifting. Tritiogenic 3He and excess 3He from mixing with Circumpolar Deep Water are excluded as possible sources. The estimated 3He/4He ratio of the injected helium component (2.4–5.0 × 10−6) is less than that of pure mantle helium and may contain radiogenic helium from continental crustal material which underlies the Bransfield Strait.
    Materialart: Article , PeerReviewed
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  • 8
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    Salty brines on the Mediterranean sea floor (1997)
    Nature Publishing Group
    In:  Nature, 387 . pp. 31-32.
    Details
    Publikationsdatum: 2017-02-28
    Materialart: Article , PeerReviewed
    Format: text
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  • 9
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    Fluxes of biogenic components from sediment trap deployment in circumpolar waters of the Drake Passage (1982)
    Nature Publishing Group
    In:  Nature, 299 (5879). pp. 145-147.
    Details
    Publikationsdatum: 2019-01-21
    Beschreibung: Circumpolar surface waters dominate the circulation of the Southern Ocean and sustain one of the ocean's largest standing stocks of biomass thereby producing a significant output of biogenic components, mainly diatoms, to the bottom sediments. Generally transit of biogenic matter from the sea surface to the sea floor affects nutrient regeneration fuels benthic life and transfers signals to the sediment record1–5. Reliable quantification of the relationship between biological production, fractionation of skeletal and tissue components and bottom sediment accumulation depends on direct vertical flux measurements from sediment trap deployments6–9, which have proved to be most scientifically productive10–13. We now present data on vertical mass fluxes from the Southern Ocean and evidence for strong biogeochemical fractionation between organic carbon-, nitrogen- and phosphorus-containing compounds, siliceous and calcareous skeletal remains, and refractory aluminosilicates.
    Materialart: Article , PeerReviewed
    Format: text
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  • 10
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    A geochemical model of the Peru Basin deep-sea floor and the response of the system to technical impacts (2001)
    Pergamon Press
    In:  Deep Sea Research Part II: Topical Studies in Oceanography, 48 . pp. 3737-3756.
    Details
    Publikationsdatum: 2020-08-05
    Beschreibung: A geochemical model of the Peru Basin deep-sea floor, based on an extensive set of field data as well as on numerical simulations, is presented. The model takes into account the vertical oscillations of the redox zonation that occur in response to both long-term (glacial/interglacial) and short-term (El Niño Southern Oscillation (ENSO) time scale) variations in the depositional flux of organic matter. Field evidence of reaction between the pore water NO3− and an oxidizable fraction of the structural Fe(II) in the clay mineral content of the deep-sea sediments is provided. The conditions of formation and destruction of reactive clay Fe(II) layers in the sea floor are defined, whereby a new paleo-redox proxy is established. Transitional NO3− profile shapes are explained by periodic contractions and expansions of the oxic zone (ocean bottom respiration) on the ENSO time scale. The near-surface oscillations of the oxic–suboxic boundary constitute a redox pump mechanism of major importance with respect to diagenetic trace metal enrichments and manganese nodule formation, which may account for the particularly high nodule growth rates in this ocean basin. These conditions are due to the similar depth ranges of both the O2 penetration in the sea floor and the bioturbated high reactivity surface layer (HRSL), all against the background of ENSO-related large variations in depositional Corg flux. Removal of the HRSL in the course of deep-sea mining would result in a massive expansion of the oxic surface layer and, thus, the shut down of the near-surface redox pump for centuries, which is demonstrated by numerical modeling.
    Materialart: Article , PeerReviewed
    Format: text
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