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  • Nature Publishing Group  (14,137)
  • 2020-2023  (5)
  • 1945-1949  (14,132)
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Year
  • 1
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    The impact of faulting complexity and type on earthquake rupture dynamics (2022)
    Nature Publishing Group
    Details
    Publication Date: 2022-10-31
    Description: The statistical properties of seismicity are known to be affected by several factors such as the rheological parameters of rocks. We analysed the earthquake double-couple as a function of the faulting type. Here we show that it impacts the moment tensors of earthquakes: thrust- faulting events are characterized by higher double-couple components with respect to strike- slip- and normal-faulting earthquakes. Our results are coherent with the stress dependence of the scaling exponent of the Gutenberg-Richter law, which is anticorrelated to the double- couple. We suggest that the structural and tectonic control of seismicity may have its origin in the complexity of the seismogenic source marked by the width of the cataclastic damage zone and by the slip of different fault planes during the same seismic event; the sharper and concentrated the slip as along faults, the higher the double-couple. This phenomenon may introduce bias in magnitude estimation, with possible impact on seismic forecasting.
    Description: Published
    Description: 258
    Description: 2T. Deformazione crostale attiva
    Description: JCR Journal
    Keywords: double couple ; damage zone ; different fault type ; seismicity ; tectonics ; fault type ; seismicity ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
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    Small sinking particles control anammox rates in the Peruvian oxygen minimum zone (2021)
    Nature Publishing Group
    In:  EPIC3Nature Communications, Nature Publishing Group, 12(1), pp. 1-12
    Details
    Publication Date: 2022-08-15
    Description: Anaerobic oxidation of ammonium (anammox) in oxygen minimum zones (OMZs) is a major pathway of oceanic nitrogen loss. Ammonium released from sinking particles has been suggested to fuel this process. During cruises to the Peruvian OMZ in April–June 2017 we found that anammox rates are strongly correlated with the volume of small particles (128–512 µm), even though anammox bacteria were not directly associated with particles. This suggests that the relationship between anammox rates and particles is related to the ammonium released from particles by remineralization. To investigate this, ammonium release from particles was modelled and theoretical encounters of free-living anammox bacteria with ammonium in the particle boundary layer were calculated. These results indicated that small sinking particles could be responsible for ~75% of ammonium release in anoxic waters and that free-living anammox bacteria frequently encounter ammonium in the vicinity of smaller particles. This indicates a so far underestimated role of abundant, slow-sinking small particles in controlling oceanic nutrient budgets, and furthermore implies that observations of the volume of small particles could be used to estimate N-loss across large areas.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , NonPeerReviewed
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  • 3
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    Non-syntrophic methanogenic hydrocarbon degradation by an archaeal species (2022)
    Nature Publishing Group
    In:  EPIC3Nature, Nature Publishing Group, 601(7892), pp. 257-262
    Details
    Publication Date: 2022-08-11
    Description: The methanogenic degradation of oil hydrocarbons can proceed through syntrophic partnerships of hydrocarbon-degrading bacteria and methanogenic archaea1,2,3. However, recent culture-independent studies have suggested that the archaeon ‘Candidatus Methanoliparum’ alone can combine the degradation of long-chain alkanes with methanogenesis4,5. Here we cultured Ca. Methanoliparum from a subsurface oil reservoir. Molecular analyses revealed that Ca. Methanoliparum contains and overexpresses genes encoding alkyl-coenzyme M reductases and methyl-coenzyme M reductases, the marker genes for archaeal multicarbon alkane and methane metabolism. Incubation experiments with different substrates and mass spectrometric detection of coenzyme-M-bound intermediates confirm that Ca. Methanoliparum thrives not only on a variety of long-chain alkanes, but also on n-alkylcyclohexanes and n-alkylbenzenes with long n-alkyl (C≥13) moieties. By contrast, short-chain alkanes (such as ethane to octane) or aromatics with short alkyl chains (C≤12) were not consumed. The wide distribution of Ca. Methanoliparum4,5,6 in oil-rich environments indicates that this alkylotrophic methanogen may have a crucial role in the transformation of hydrocarbons into methane.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , NonPeerReviewed
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  • 4
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    Return to rapid ice loss in Greenland and record loss in 2019 detected by the GRACE-FO satellites (2020)
    Nature Publishing Group
    In:  EPIC3Communications Earth & Environment, Nature Publishing Group, 1(1), pp. 1-8
    Details
    Publication Date: 2022-06-20
    Description: Between 2003-2016, the Greenland ice sheet (GrIS) was one of the largest contributors to sea level rise, as it lost about 255 Gt of ice per year. This mass loss slowed in 2017 and 2018 to about 100 Gt yr−1. Here we examine further changes in rate of GrIS mass loss, by analyzing data from the GRACE-FO (Gravity Recovery and Climate Experiment – Follow On) satellite mission, launched in May 2018. Using simulations with regional climate models we show that the mass losses observed in 2017 and 2018 by the GRACE and GRACE-FO missions are lower than in any other two year period between 2003 and 2019, the combined period of the two missions. We find that this reduced ice loss results from two anomalous cold summers in western Greenland, compounded by snow-rich autumn and winter conditions in the east. For 2019, GRACE-FO reveals a return to high melt rates leading to a mass loss of 223 ± 12 Gt month−1 during the month of July alone, and a record annual mass loss of 532 ± 58 Gt yr−1.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 5
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    Arctic glaciers record wavier circumpolar winds (2022)
    Nature Publishing Group
    In:  EPIC3Nature Climate Change, Nature Publishing Group, 12(3), pp. 249-255
    Details
    Publication Date: 2022-06-20
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 6
    Electronic Resource
    Electronic Resource
    Snowdonia (1949)
    [s.l.] : Nature Publishing Group
    Nature 164 (1949), S. 1106-1106 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THIS is the first of a series of regional volumes to ba iieubd by the editors of the New Naturalist. They I wppose to deal with those parts of Britain which\fte within areas which are likely to become national parks in the near future and which possess a special appeal to naturalists and lovers of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1641106a0
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  • 7
    Electronic Resource
    Electronic Resource
    Source of the Cosmic Rays (1949)
    [s.l.] : Nature Publishing Group
    Nature 164 (1949), S. 1112-1114 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE enormous energy possessed by the cosmic rays hasttswren rise to many speculations as to how theyfpoufi be generated, which have gone deep into the ijiLperties of the ultimate particles, and into the dismpution of matter in outer space1. The purpose of the present note is to direct attention to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1641112a0
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  • 8
    Electronic Resource
    Electronic Resource
    The Rehbinder Effect (1949)
    [s.l.] : Nature Publishing Group
    Nature 164 (1949), S. 1127-1127 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] REHBINDER and his colleagues have recorded in a series of papers1 that surface-active liquids, brought into contact with the surface of metals, in particular of single crystals, markedly diminish the mechanical strength. In Nature recently2, D. S. Kemsley, trying ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1641127a0
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  • 9
    Electronic Resource
    Electronic Resource
    Periods and Eccentricities of Close Binary Stars (1949)
    [s.l.] : Nature Publishing Group
    Nature 164 (1949), S. 1129-1130 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] EXAMINATION of the material in the Fifth Lick Catalogue of spectroscopic binaries, recently published by Moore and Neubauer1, reveals a definite relation between periods of revolution P and eccentricities of orbits e for binaries with short periods if their components belong to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1641129a0
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  • 10
    Electronic Resource
    Electronic Resource
    Prof. T. Slater Price, F.R.S. (1949)
    [s.l.] : Nature Publishing Group
    Nature 164 (1949), S. 1116-1116 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] PROF. THOMAS SLATER PRICE was born on August 24, 1875, and died on OcMier 29, 1949. Educated at King Edward's Hig4'i$3hool, Birmingham, he proceeded to Mason Collage, Birmingham, and graduated with first-class flonours in chemistry and physics at the University or London in 1895. In that year he ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1641116a0
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