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  • Articles  (8)
  • Open Access-Papers  (8)
  • 1980-1984  (8)
  • 1940-1944
  • 1935-1939
  • 1982  (8)
  • 1938
Collection
  • Articles  (8)
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  • 1980-1984  (8)
  • 1940-1944
  • 1935-1939
Year
  • 1
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    Studies on Colombian cryptogams XVII. On a new antipodal element in the Neotropical Paramos-Dendrocryphaea latifolia sp.nov. (Musci) (1982)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht (2352-5754) vol.497 (1982) nr.1 p.175
    Details
    Publication Date: 2015-05-08
    Description: Dendrocryphaea latifolia sp.nov. from the Páramo de Chisacá, Colombia is described and illustrated. It is allied to D. cuspidata from austral South America but differs from that species in the broader leaves, globose capsules and the basally smooth exostome teeth. A key to the four species of Dendrocryphaea and a conspectus of the genus are provided. D. ramosissima is reduced to synonymy under D. lechleri. Dendrocryphaea is a rheophytic genus with antipodal distribution. Its discovery in the high Andes of Colombia extends to 34 the number of genera of bryophytes with similar antipodal affinities known from the páramos of the northern sector of the Andean cordillera, The nature and origin of these distribution patterns is discussed. In the case of Dendrocryphaea wind and birds may have played a role in the transport of spores and the establishment of its present distribution.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 2
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    Core drilling on Vernagtferner (Oetztal Alps, Austria) in 1979: Deuterium and oxygen-18 contents (1982)
    In:  EPIC3Zeitschrift für Gletscherkunde und Glazialgeologie, 1, pp. 23-35
    Details
    Publication Date: 2019-07-17
    Description: In March, 1979, core drillings were made on Vernagtferner (Oetztal Alps, Austria). The entire core I (81 m) was divided into 2.5 cm sections, from which 2H and 180 measurements were made. The measurements on core II (45 m) were made only along selected sections. A summary is given of the changes which occur in the deuterium excess d due to evaporation or melting in a snow cover. The resulting oscillations in excess d values are then used for dating the ice in core I. These oscillations in excess d resolve the yearly firn and ice layers better than the corresponding oscillations in the 2H or 180 content. An age of between 75 and 83 years, and a corresponding average yearly accumulation rate of between 0.85 and 0.77 m water equivalent was calculated for the core. Although a comparison of the isotope contents in core J with temperature data from Vent (Oetztal) yields a discrepancy of four years, the rise in temperature in the second half of the 1940's is clearly reflected by a corresponding rise in isotope content along the core. The results of these isotope analyses are also compared to results from an earlier core drilling on the Vernagtferner, as well as from a core drilling on the cold Grenzgletscher, Switzerland.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 3
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    Numerical modelling of the Vernagtferner and its fluctuations (1982)
    In:  EPIC3Zeitschrift für Gletscherkunde und Glazialgeologie, 1, pp. 93-106
    Details
    Publication Date: 2019-07-17
    Description: The long historical record and extensive modern observations for the Vernagtferner make the glacier a prime object for modelling of its present state and past fluctuations. Historically, the glacier appears to have passed through two radically different phases, characterized by cyclic surging and by shrinkage back into higher accumulation-favorable regions, respectively. A unified computer simulation of this bimodal behavior on a highly complex bedrock topography remains beyond the power of existing glacier models. However, the essentials of the two phases have been reproduced. It appears that the surging mode of flow could operate only as long as the glacier remained large enough to create substantial basal melting through the combination of high base stresses and rapid flow rates. The velocity and thickness profiles observed during the retreat phase are shown to be well simulated by a deformational flow model including parameterizations of the most essential three-dimensional features. The great retreat of the glacier since 1848 appears to have resulted from a climatic mass balance decrease over its entire surface of order 0.2 rna - I superimposed on an enlarged post-surge ablation region. This interpretation holds the potential for future readvance, and perhaps an eventual return to the surging mode, foreshadowed by the recent general thickening of the Vernagtferner.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 4
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    Fall-lot 120 mm ø (1982)
    Universität
    In:  EPIC3Göttingen, Universität
    Details
    Publication Date: 2015-11-13
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 5
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    Titan's highly variable plasma environment (1982)
    In:  EPIC3Journal of geophysical researchA2), 87, pp. 881-885
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 6
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    Emil Friedrichs (1982)
    Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research
    In:  EPIC3Polarforschung, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research, 52(1/2), pp. 81-82, ISSN: 0032-2490
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Polarforschung" , peerRev
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  • 7
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    Hangformen und hangformende Prozesse in Süd-Victoria-Land, Antarktis (1982)
    Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research
    In:  EPIC3Polarforschung, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research, 52(1/2), pp. 1-41, ISSN: 0032-2490
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Polarforschung" , peerRev
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  • 8
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    Studies on Colombian cryptogams XVII. On a new antipodal element in the Neotropical Paramos-Dendrocryphaea latifolia sp.nov. (Musci) (1982)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht vol. 497 no. 1, pp. 175-184
    Details
    Publication Date: 2024-01-12
    Description: Dendrocryphaea latifolia sp.nov. from the P\xc3\xa1ramo de Chisac\xc3\xa1, Colombia is described and illustrated. It is allied to D. cuspidata from austral South America but differs from that species in the broader leaves, globose capsules and the basally smooth exostome teeth. A key to the four species of Dendrocryphaea and a conspectus of the genus are provided. D. ramosissima is reduced to synonymy under D. lechleri. Dendrocryphaea is a rheophytic genus with antipodal distribution. Its discovery in the high Andes of Colombia extends to 34 the number of genera of bryophytes with similar antipodal affinities known from the p\xc3\xa1ramos of the northern sector of the Andean cordillera, The nature and origin of these distribution patterns is discussed. In the case of Dendrocryphaea wind and birds may have played a role in the transport of spores and the establishment of its present distribution.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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