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  • 1
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    High frequency fluctuations in the heat content of an ocean general circulation model (2012)
    COPERNICUS GESELLSCHAFT MBH
    In:  EPIC3Ocean Science, COPERNICUS GESELLSCHAFT MBH, 8, pp. 813-825, ISSN: 1812-0784
    Details
    Publication Date: 2019-07-17
    Description: The transport and storage of heat by the ocean is of crucial importance because of its effect on ocean dynamics and its impact on the atmosphere, climate and climate change. Unfortunately, limits to the amount of data that can be collected and stored mean that many experimental and modelling studies of the heat budget have to make use of mean datasets where the effects of short term fluctuations are lost. In this paper we investigate the magnitude of the resulting errors by making use of data from OCCAM, a high resolution global ocean model. The model carries out a proper heat balance every time step so any imbalances that are found in the analysis must result from the use of mean fields. The study concentrates on two areas of the ocean affecting the El Nino. The first is the region of tropical instability waves north of the Equator. The second is in the upwelling region along the Equator. It is shown that in both cases, processes with a period of less than five days can have a significant impact on the heat budget. Thus, analyses using data averaged over five days or more are likely to have significant errors. It is also shown that if a series of instantaneous values is available, reasonable estimates can be made of the size of the errors. In model studies, such values are available in the form of the datasets used to restart the model. In experimental studies they may be in the form of individual unaveraged observations.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Format: application/pdf
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    PAPER (OA)
  • 2
    Electronic Resource
    Electronic Resource
    Some new ternary ferromagnets (abstract) : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 4825-4825 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A number of new ternary ferromagnetic compounds have been prepared1 which have the general formula A14MnX11 (A=Ca, Sr and X=As, Sb, or Bi) and are isostructural to the main group Zintl compounds Ca14GaAs11 (Ref. 2) and Ca14AlSb11.3 The Mn-Mn nearest-neighbor distances in these compounds are ≥11 A(ring). Each of the compounds containing Mn is a metallic ferromagnet with a Curie transition in the neighborhood of 40–60 K. From magnetization measurements in the paramagnetic regime it appears that the Mn has a valence of +3 and that there are good local moments associated with the four unpaired electrons. This is in contrast to the low-temperature state in which the ordered ferromagnetic moment is only about 2.5 μB/Mn. Since no structural change is found upon cooling the sample below the Curie temperature and resistivity measurements show a strong interaction between the conduction electrons and the local moments, we suggest that the ferromagnetic moment is reduced by coupling with the conduction electrons.〈ks〉
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348244
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Structure and properties of the transition-metal zintl compounds: A14MnBi11 (A = Ca, Sr, Ba) (1992)
    s.l. : American Chemical Society
    Chemistry of materials 4 (1992), S. 435-440 
    Details
    ISSN: 1520-5002
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/cm00020a036
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Structure and properties of the transition-metal Zintl compounds A14MnPn11 (A = Ca, Sr, Ba; Pn = As, Sb) (1994)
    s.l. : American Chemical Society
    Chemistry of materials 6 (1994), S. 93-99 
    Details
    ISSN: 1520-5002
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/cm00037a020
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    Paper (German National Licenses)
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  • 5
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    Highly selective hydroformylation of long-chain alkenes in a supercritical fluid ionic liquid biphasic system (2011)
    Royal Society of Chemistry (RSC)
    Details
    Publication Date: 2011-05-27
    Description: Using a rhodium complex of nixantphos tagged with an imidazolium group, hydroformylation of 1-octene has been carried out in a supercritical fluid-ionic liquid flow system with l:b ratio of 40 and low rhodium losses. Thulani E. Kunene, Paul B. Webb, David J. Cole-Hamilton ( from Green Chem.) Thulani E. Kunene, Green Chem., 2011, DOI: 10.1039/C1GC15142H To cite this article before page numbers are assigned, use the DOI form of citation above. The content of this RSS Feed (c) The Royal Society of Chemistry
    Print ISSN: 1463-9262
    Electronic ISSN: 1463-9270
    Topics: Chemistry and Pharmacology
    Published by Royal Society of Chemistry (RSC)
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