Popp, Christian

[["dc.contributor.author","Popp, C."],["dc.creator.editor","Röckelein, H."],["dc.date.accessioned","2017-11-29T17:14:33Z"],["dc.date.available","2017-11-29T17:14:33Z"],["dc.date.issued","2010"],["dc.format.extent","231"],["dc.fs.externid","470160"],["dc.fs.pkfprnr","10596"],["dc.identifier.fs","580219"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11452"],["dc.language.iso","de"],["dc.notes.intern","FactScience-Import"],["dc.notes.status","fcwi-Röckelein Hrsg. Reihe"],["dc.publisher","Schnell + Steiner"],["dc.publisher.place","Regensburg"],["dc.relation.crisseries","Studien zum Frauenstift Gandersheim und seinen Eigenklöstern"],["dc.relation.ispartofseries","Studien zum Frauenstift Gandersheim und seinen Eigenklöstern"],["dc.title","Der Schatz der Kanonissen. Heilige und Reliquien im Frauenstift Gandersheim"],["dc.type","book"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3737"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","Environmental Earth Sciences"],["dc.bibliographiccitation.lastpage","3749"],["dc.bibliographiccitation.volume","71"],["dc.contributor.author","Siegesmund, Siegfried"],["dc.contributor.author","Popp, T."],["dc.contributor.author","Kaufhold, A."],["dc.contributor.author","Dohrmann, Reiner"],["dc.contributor.author","Graesle, W."],["dc.contributor.author","Hinkes, R."],["dc.contributor.author","Schulte-Kortnack, D."],["dc.date.accessioned","2018-11-07T09:42:01Z"],["dc.date.available","2018-11-07T09:42:01Z"],["dc.date.issued","2014"],["dc.description.abstract","For the safe disposal of high-level radioactive waste, different host rocks are currently being considered. The favorable properties of clay are low permeability, some retention capacity concerning radionuclides, and the ability to self-seal cracks and fissures, e.g. by swelling or time-dependent compaction creep. In Switzerland, the Jurassic Opalinus Clay is envisaged as a potential host rock which-at Mont Terri-is subdivided into the sandy, shaly, and carbonate-rich facies, the latter being less abundant. For long-term safety assessments, the understanding of the relations of properties (e.g. mineralogical composition and microstructure) and performance (e.g. mechanical behavior) of clays and claystones is essential. In the case of the sandy Opalinus Clay, the mechanical strength increases with increasing carbonate content, because carbonates form the matrix. The mineralogical investigation of a set of sandy facies samples proved a significantly larger carbonate content (20-40 mass %) when compared to the shaly facies (10-20 mass %). The carbonates of the shaly Opalinus Clay, on the other hand, are mostly localized fossils aligned parallel to the bedding, acting as predetermined breaking points. Image analysis of SEM images of polished sections proved the determined microstructural differences. In addition, carbonate particles of the sandy facies are mostly isometric, whereas carbonate particles of the shaly facies cover a greater range of shapes. The mechanical tests were accompanied by investigations of the p- and s-wave velocities, which revealed that the anisotropy of the sandy facies is less pronounced than sedimentological analyses would suggest. The mechanical strength, which, for the first time, presents results of real triaxial tests of the sandy facies. The samples of the sandy facies exhibit a failure strength of sigma (eff,B), approximately twice as high as was found for the shaly facies considering the deformation axis parallel to the bedding. Similar values were obtained when measuring perpendicularly to the bedding."],["dc.identifier.doi","10.1007/s12665-013-2768-2"],["dc.identifier.isi","000333475800037"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33863"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1866-6299"],["dc.relation.issn","1866-6280"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.title","Seismic and mechanical properties of Opalinus Clay: comparison between sandy and shaly facies from Mont Terri (Switzerland)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","749"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","CLIMATE OF THE PAST"],["dc.bibliographiccitation.lastpage","766"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","Svensson, Anders"],["dc.contributor.author","Bigler, M."],["dc.contributor.author","Blunier, T."],["dc.contributor.author","Clausen, H. B."],["dc.contributor.author","Dahl-Jensen, Dorthe"],["dc.contributor.author","Fischer, H."],["dc.contributor.author","Fujita, S."],["dc.contributor.author","Goto-Azuma, K."],["dc.contributor.author","Johnsen, S. J."],["dc.contributor.author","Kawamura, Kensuke"],["dc.contributor.author","Kipfstuhl, Sepp"],["dc.contributor.author","Kohno, M."],["dc.contributor.author","Parrenin, F."],["dc.contributor.author","Popp, T."],["dc.contributor.author","Rasmussen, Steve"],["dc.contributor.author","Schwander, J."],["dc.contributor.author","Seierstad, I."],["dc.contributor.author","Severi, M."],["dc.contributor.author","Steffensen, J. P."],["dc.contributor.author","Udisti, Roberto"],["dc.contributor.author","Uemura, R."],["dc.contributor.author","Vallelonga, P."],["dc.contributor.author","Vinther, B. M."],["dc.contributor.author","Wegner, A."],["dc.contributor.author","Wilhelms, Frank"],["dc.contributor.author","Winstrup, M."],["dc.date.accessioned","2018-11-07T09:30:07Z"],["dc.date.available","2018-11-07T09:30:07Z"],["dc.date.issued","2013"],["dc.description.abstract","The Toba eruption that occurred some 74 ka ago in Sumatra, Indonesia, is among the largest volcanic events on Earth over the last 2 million years. Tephra from this eruption has been spread over vast areas in Asia, where it constitutes a major time marker close to the Marine Isotope Stage 4/5 boundary. As yet, no tephra associated with Toba has been identified in Greenland or Antarctic ice cores. Based on new accurate dating of Toba tephra and on accurately dated European stalagmites, the Toba event is known to occur between the onsets of Greenland interstadials (GI) 19 and 20. Furthermore, the existing linking of Greenland and Antarctic ice cores by gas records and by the bipolar seesaw hypothesis suggests that the Antarctic counterpart is situated between Antarctic Isotope Maxima (AIM) 19 and 20. In this work we suggest a direct synchronization of Greenland (NGRIP) and Antarctic (EDML) ice cores at the Toba eruption based on matching of a pattern of bipolar volcanic spikes. Annual layer counting between volcanic spikes in both cores allows for a unique match. We first demonstrate this bipolar matching technique at the already synchronized Laschamp geomagnetic excursion (41 ka BP) before we apply it to the suggested Toba interval. The Toba synchronization pattern covers some 2000 yr in GI-20 and AIM19/20 and includes nine acidity peaks that are recognized in both ice cores. The suggested bipolar Toba synchronization has decadal precision. It thus allows a determination of the exact phasing of inter-hemispheric climate in a time interval of poorly constrained ice core records, and it allows for a discussion of the climatic impact of the Toba eruption in a global perspective. The bipolar linking gives no support for a long-term global cooling caused by the Toba eruption as Antarctica experiences a major warming shortly after the event. Furthermore, our bipolar match provides a way to place palaeo-environmental records other than ice cores into a precise climatic context."],["dc.identifier.doi","10.5194/cp-9-749-2013"],["dc.identifier.isi","000317009700016"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10609"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31225"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Copernicus Gesellschaft Mbh"],["dc.relation.issn","1814-9332"],["dc.relation.issn","1814-9324"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0/"],["dc.title","Direct linking of Greenland and Antarctic ice cores at the Toba eruption (74 ka BP)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]