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  • German  (3)
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  • 1
    Publication Date: 2019-04-17
    Description: In S?dostalaska wird eine relative Meeresspiegelabsenkung von bis zu 4 cm/ a beobachtet. Da dieses Gebiet w?hrend der letzten Kaltperiode durch das Kordillerische Eisschild bedeckt war und noch heute von Vergletscherung gepr?gt ist, liegt die Vermutung nahe, da? die Meeresspiegel?nderungen zumindest teilweise durch isostatische Ausgleichsvorg?nge hervorgerufen werden. Um diese Hypothese zu pr?fen, werden f?r dieses Gebiet eislastinduzierte Vertikalbewegungen und Geoid?nderungen mit Hilfe viskoelastischer Erdmodelle berechnet. Insbesondere werden sechs siebenschichtige Erdmodelle verwendet, die unterschiedliche Viskostit?tsprofile ber?cksichtigen und die Bandbreite der plausiblen Lithosph?renm?chtigkeiten abdecken. Das globale Lastmodell ICE-3G wird erweitert und das regionale Lastmodell AL-1 entwickelt, welches die rezente Vergletscherung S?dostalaskas ber?cksichtigt. Weiterhin werden die Ozeane als Last einbezogen. Ein Vergleich der berechneten mit den beobachteten Meeresspiegel?nderungen zeigt, da? die Beobachtungen nur zu einen geringen Anteil von wenigen Millimetern pro Jahr durch Isostasie erkl?rt werden k?nnen.
    Language: German
    Type: http://purl.org/eprint/type/Report
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  • 2
    Publication Date: 2019-06-12
    Description: The basic seismic load parameters for the upcoming national design regulation for DIN EN 1998-1/NA result from the reassessment of the seismic hazard supported by the German Institution for Civil Engineering (DIBt). This study is based on a comprehensive involvement of accessible uncertainties in models and parameters. It includes the provision of a rational framework for integrating epistemic uncertainties and aleatory variabilities in a comprehensive way and incorporates significant improvements. It is based on updated and extended databases, robust methods to evolve sets of models representing epistemic uncertainties and a selection of latest : ground shaking prediction models. The output specifications were designed according to the user oriented needs: Seismic load parameters are calculated for rock conditions, mean return periods of 475, 975 and 2475 years and delivered as uniform hazard spectra, seismic hazard maps for peak ground acceleration, spectral response accelerations and macroseismic intensities as mean, median and 84 % quantile. Examples of some elements of the input and a few basis results are shown.
    Language: German
    Type: http://purl.org/escidoc/metadata/ves/publication-types/article
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  • 3
    Publication Date: 2019-06-13
    Description: The main focus of the TERENO Northeastern German Lowland Observatory (TERENO-Northeast) is the regional impact of Global Change. Since 2011, the observatory has recorded changes in the geo-, hydro-, bio- and atmosphere at six main study sites. The year 2018, particularly in northeast Germany, was record-breaking in regard to dryness and heat. The mean temperature in Mecklenburg-Vorpommern was 2 ?C above the long-term average and precipitation was very low at 440 mm (normally around 600 mm). The extreme summer of 2018 was a special opportunity for TERENO-Northeast to measure the regional effects of climate change. One of the consequences was the large number of forest fires, with one major fire destroying around 400 hectares. Other extreme reactions of the ecosystems were shown in TERENO-Northeast. For example, for the first time since its rewetting, Polder Zarnekov fell dry, with unpredictable consequences for the greenhouse gas exchanges. The forest ecosystems of M?ritz National Park, on the other hand, survived the extreme summer surprisingly well, partly because the months before the drought were relatively damp. The research activities of TERENO-Northeast form an important basis to develop realistic options for improved adaptation strategies to the ongoing global change with its particular region-specific effects and challenges.
    Language: German
    Type: http://purl.org/escidoc/metadata/ves/publication-types/article
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