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  • 2005-2009  (82)
  • 1985-1989  (112)
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  • 1
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    Colloquium on diatomcopepod interactions (2005)
    In:  EPIC3Marine ecology-progress series, 286, pp. 293-305
    Details
    Publikationsdatum: 2019-07-17
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Format: application/pdf
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    ARTIKEL (OA)
  • 2
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    Antarctic Climate Change and the Environment (2009)
    In:  EPIC3SCAR & Scott Polar Research Institute, Cambridge, 526 p., ISBN: 978-0-948277-22-1
    Details
    Publikationsdatum: 2014-04-15
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Book , peerRev
    Format: application/pdf
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  • 3
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    The Reefs of Mauritius (2005)
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: The study investigated whether the coral reefs of Mauritius had suffered a mass bleaching event during 1998 as had been reported for other Indian Ocean reefs. Sea-surface temperature (SST) anomaly charts produced by NOAA show that SST was raised 1o C - 1.25o C above the climatological maximum for this region during February 1998, but the extent of bleaching around Mauritius was thought not to be severe, but was not recorded. A rapid assessment of the degree of coral bleaching on reefs around the whole coast of Mauritius was made during April 1999. Surveys were conducted while snorkelling and SCUBA diving and assessments made by direct observation, underwater video transects and underwater photography. Video was analysed to confirm the results from the field surveys. Results were displayed within a Geographical Information System (GIS). Meteorological data for the period between January 1997 and April 1999 were also analysed. The results indicate that the coral reefs in Mauritius were still healthy, but that all sites showed some signs of degradation particularly from boat and anchor damage and cyclone damage. The coral reefs of Mauritius do appear to have escaped the mass bleaching event of 1998. There were no large areas of dead standing coral other than on Barrier Reef off Mahebourg. Mean bleaching was 〈10% at all sites and in all cases represented only partial bleaching of colonies. It is suggested that Mauritius escaped the mass bleaching event due to the effect of cyclone Anacelle, which produced wet and cloudy unsettled weather during February 1998. The minor bleaching episode observed during this survey is thought to be a frequent and normal event relating to large environmental fluctuations experienced within the lagoons. With the potential threat of increasing mass coral bleaching events, it is suggested that Mauritius needs to act quickly to protect its coral reefs from further degradation.
    Schlagwort(e): Coral reefs
    Repository-Name: AquaDocs
    Materialart: Preprint
    Format: 219714 bytes
    Format: application/pdf
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  • 4
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    Measuring Change and Recovery in Reef Ecosystems (2005)
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: Assessing environmental impacts and monitoring ecosystem recovery requires an understanding of the underlying spatial and temporal changes that have occurred. There are three main questions to be answered with specific reference to the Indian Ocean and the current status and future of coral reef ecosystems: i) what are the effects of widespread coral mortality going to be in the Indian Ocean, ii) how long will it take for reef ecosystems to recover, and iii) will ‘recovered’ systems have the same structure and functional integrity? Research into these questions must bear in mind that most measurements to be made are points on a long-term trend. Although there may be another disturbance event similar to that of 1998, its occurrence (if it occurs) should not negate the work, but provide further data points which contribute to the understanding and establishment of long-term trends.
    Beschreibung: Unpublished
    Schlagwort(e): Coral reefs
    Repository-Name: AquaDocs
    Materialart: Working Paper , Non-Refereed
    Format: 133105 bytes
    Format: application/pdf
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  • 5
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    The Reefs of the Granitic Islands of the Seychelles (2005)
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    Publikationsdatum: 2021-05-19
    Beschreibung: The status of coral reefs in the granitic islands of the Seychelles archipelago has been assessed by two independent surveys following the mass mortality caused by the 1997/98 bleaching event. Engelhardt (2000), working in collaboration with the Seychelles Department of Conservation surveyed 15 sites located mainly on the north west coast of Mahe during November and December 1999. During January 2000, Turner, Klaus, Hardman and West, working in collaboration with the Seychelles Marine Park Authority, surveyed 46 reef sites mainly to the east of Mahe, including Ste Anne, Ile Moyenne, Ile Cerf, Cousine, Praslin, Curieuse, La Digue, Grand Soeur and Felicite. Reefs around the granitic islands are shallow and rarely exceed 15 m depth. Both surveys aimed to assess reef structure over the full depth range, with corals identified to genus and species where possible, and assessed reef recovery by recording new colonies believed to have established since the bleaching event.
    Schlagwort(e): Coral reefs
    Repository-Name: AquaDocs
    Materialart: Preprint
    Format: 145583 bytes
    Format: application/pdf
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  • 6
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    Initial Considerations on Methods to Survey Reef Status and Recovery (2005)
    CORDIO/SAREC.
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: Published
    Schlagwort(e): Coral reefs
    Repository-Name: AquaDocs
    Materialart: Book Section , Non-Refereed
    Format: 129742 bytes
    Format: application/pdf
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  • 7
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    Antarctic Climate Change and the Environment (2009)
    In:  EPIC3Antarctic Science, 21, pp. 541-563
    Details
    Publikationsdatum: 2019-07-17
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
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  • 8
    Digitale Medien
    Digitale Medien
    High-pressure oxidation of titanium disilicide/polycrystalline silicon composite films (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 1729-1732 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The oxidation of titanium disilicide on polycrystalline silicon-coated substrates by steam oxidation at pressures up to 25 atm has been investigated. Films were examined by Rutherford backscattering spectrometry and transmission electron microscopy. At low temperatures, the formation of a silicon dioxide surface layer is limited by the transport of silicon to the reacting interface, resulting in rapid oxidation/decomposition of the silicide. At temperatures greater than 750 °C, a metal-free oxide was obtained, allowing the formation of a self-passivated self-aligned silicide structure appropriate for very-large-scale-integrated circuit applications.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.342946
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  • 9
    Digitale Medien
    Digitale Medien
    Calculated yields and fluctuations for electron degradation in liquid water and water vapor (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 3182-3188 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: Two sets of physical interaction cross sections for detailed electron track-structure calculations in liquid water and water vapor have been used to investigate the possible magnitude of phase-dependent differences in the primary yields of ionizations and their fluctuations produced during complete slowing down of electrons in the energy range from 10 eV to 10 keV. For fast electrons the calculated values of the mean energy absorbed per ion pair are 25.8 eV/ip for the liquid as compared to 30.0 eV/ip for the vapor; both results are consistent with experimental data. A similar phase effect is found in the ionization yields from each molecular subshell, since essentially the same partitioning of the total ionization cross section has been used in the calculations for the liquid and the vapor. The relative fluctuations of the ionization yields as described by the Fano factor are 0.15 for the liquid and 0.25 for the vapor; the Fano factors for each single molecular orbital are typically between 0.7 and 0.9 in both phases. The distributions in the total number of ionizations produced by the complete slowing down of electrons with initial energies above about 100 eV are Gaussian within about two standard deviations around the mean. The significance of the differences in the yields of ionizations and excitations calculated for both phases is discussed. In the absence of adequate experimental data for the basic processes, the differences are interpreted in terms of the respective assumptions made for single scattering processes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.450247
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  • 10
    Digitale Medien
    Digitale Medien
    Miniband dispersion in GaAs/AlxGa1−xAs superlattices with wide wells and very thin barriers (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 2666-2668 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Photoreflectance spectra have been used to characterize miniband formation in GaAs/ Alx Ga1−x As superlattices with wide wells (275–255 A(ring)) and withb arriers as thin as 17 A(ring). Thirty-two optical transitions are resolved in the photoreflectance spectra of the 17 A(ring) barrier sample. These experimental transitions match all those theoretically predicted from the selection rule Δn=0, including Γ- and Π-type transitions arising from miniband dispersion; these results imply sample perfection. A sample with a 40 A(ring) barrier exhibits forbidden transitions with Δn≠0; these additional transitions, together with the narrow width of the minibands for 40 A(ring) barriers, create difficulty in resolving the miniband structure.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.100189
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