Development and assessment of protective winter covers for marble statuaries of the Schlossbrücke, Berlin (Germany)     

Joerg Ruedrich  York Rieffel  Stephan Pirskawetz  Holger Alpermann  Ute Joksch  Christoph Gengnagel  Frank Weise  Rudolph Plagge  Jianhua Zhao  Siegfried Siegesmund 《Environmental Earth Sciences》2011,63(7-8):1823-1848

The present study documents the results of an inter-disciplinary model project that was planned with the aim of developing an innovative winter covering system for marble statuaries located on the Schlossbrücke (Berlin). Such a system would need to fulfil the various requirements for structural stability, aesthetics, climate and practical use. This applied research represents the first complex scientific study of the sustainability of a winter covering system. The study is characterised by the use of complex scientific instruments such as special laboratory analysis and numerical simulation tools. The interaction between the environment and the artefacts in connection with the innovative winter covering structures were studied by extensive climatic monitoring.  相似文献   

Moisture expansion as a deterioration factor for sandstone used in buildings   总被引：2，自引：1，他引：1  

Joerg Ruedrich  Tobias Bartelsen  Reiner Dohrmann  Siegfried Siegesmund 《Environmental Earth Sciences》2011,63(7-8):1545-1564

The expansion processes that develop in building stones upon changes of moisture content may be an important contributing factor for their deteriorations. Until recently, few data could be found in the literature concerning this parameter and weathering processes. Moreover, the processes that may be responsible for the moisture related expansion of natural building stones are not yet completely understood. To further elucidate this process, extensive mineralogical, petrophysical and fabric investigations were performed on eight German sandstones in order to obtain more information regarding the weathering process and its dependence on the rock fabric. The analysed sandstones show a wide range of pore size distributions and porosities. A positive correlation with the fabric and the pore space can be found for all studied petrophysical parameters. The intensity of the expansion and related swelling pressure cannot be attributed only to the swelling of clay minerals. The investigations suggest that the micropores and the resulting disjoining pressure during wet/dry cycles also play an important role. The results obtained suggest that the mechanism is related to the presence of liquid water within the porous material.  相似文献   

Semantic Execution Meets Geospatial Web Services: A Pilot Application     

Raluca Zaharia  Laurentiu Vasiliu  Joerg Hoffman  Eva Klien 《Transactions in GIS》2008,12(Z1):59-73

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Mitigating depletion of a porous geothermal aquifer in the Pannonian sedimentary basin     

Nina Rman  Andrej Lapanje  Joerg Prestor  Michael J. O’Sullivan 《Environmental Earth Sciences》2016,75(8):723

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Gas migration through Opouawe Bank at the Hikurangi margin offshore New Zealand     

Stephanie Koch  Henning Schroeder  Matthias Haeckel  Christian Berndt  Joerg Bialas  Cord Papenberg  Dirk Klaeschen  Andreia Plaza-Faverola 《Geo-Marine Letters》2016,36(3):187-196

This study presents 2D seismic reflection data, seismic velocity analysis, as well as geochemical and isotopic porewater compositions from Opouawe Bank on New Zealand’s Hikurangi subduction margin, providing evidence for essentially pure methane gas seepage. The combination of geochemical information and seismic reflection images is an effective way to investigate the nature of gas migration beneath the seafloor, and to distinguish between water advection and gas ascent. The maximum source depth of the methane that migrates to the seep sites on Opouawe Bank is 1,500–2,100 m below seafloor, generated by low-temperature degradation of organic matter via microbial CO₂ reduction. Seismic velocity analysis enabled identifying a zone of gas accumulation underneath the base of gas hydrate stability (BGHS) below the bank. Besides structurally controlled gas migration along conduits, gas migration also takes place along dipping strata across the BGHS. Gas migration on Opouawe Bank is influenced by anticlinal focusing and by several focusing levels within the gas hydrate stability zone.  相似文献   

First Record of the Belemnite Genus Hibolithes from Late Jurassic–Early Cretaceous Turbidites from Malaysia     

Muhammad MURTAZA  Abdul Hadi Abd RAHMAN  Joerg MUTTERLOSE  Najiatun NAJLA  Mazshurraiezal Bin NASIR 《《地质学报》英文版》2021,95(2):333-341

Discovery of the remains of belemnites referred to the Hibolithes sp. from the Jurassic–Cretaceous Pedawan Formation in Sarawak, on the island of Borneo(Malaysia) comprises four fragments of belemnite rostra. The specimens are characterized by multiple fractures and vein filling. Two fragments measuring about 130 mm are relatively intact, with only part of the alveolar region missing; a third piece represents the middle part of a rostrum, and the fourth specimen is too fragmentary to be assigned to any specific part of the rostrum. Based on specimen characteristics, a Tithonian–Hauterivian age is plausible. The sedimentary succession that yielded the belemnite material comprises thick shale that reflects the Te division of Bouma sequence. The occurrence of a Hibolithes taxon in the uppermost Jurassic to lowermost Cretaceous Pedawan Formation sediments in Borneo reflects a near to global palaeobiogeographic distribution of this genus.  相似文献   

Relative timing of last glacial maximum and late-glacial events in the central tropical Andes     

Gordon R.M. Bromley  Joerg M. Schaefer  Gisela Winckler  Brenda L. Hall  Claire E. Todd  Kurt M. Rademaker 《Quaternary Science Reviews》2009,28(23-24):2514-2526

Whether or not tropical climate fluctuated in synchrony with global events during the Late Pleistocene is a key problem in climate research. However, the timing of past climate changes in the tropics remains controversial, with a number of recent studies reporting that tropical ice age climate is out of phase with global events. Here, we present geomorphic evidence and an in-situ cosmogenic ³He surface-exposure chronology from Nevado Coropuna, southern Peru, showing that glaciers underwent at least two significant advances during the Late Pleistocene prior to Holocene warming. Comparison of our glacial-geomorphic map at Nevado Coropuna to mid-latitude reconstructions yields a striking similarity between Last Glacial Maximum (LGM) and Late-Glacial sequences in tropical and temperate regions.Exposure ages constraining the maximum and end of the older advance at Nevado Coropuna range between 24.5 and 25.3 ka, and between 16.7 and 21.1 ka, respectively, depending on the cosmogenic production rate scaling model used. Similarly, the mean age of the younger event ranges from 10 to 13 ka. This implies that (1) the LGM and the onset of deglaciation in southern Peru occurred no earlier than at higher latitudes and (2) that a significant Late-Glacial event occurred, most likely prior to the Holocene, coherent with the glacial record from mid and high latitudes. The time elapsed between the end of the LGM and the Late-Glacial event at Nevado Coropuna is independent of scaling model and matches the period between the LGM termination and Late-Glacial reversal in classic mid-latitude records, suggesting that these events in both tropical and temperate regions were in phase.  相似文献   

Late glacial and holocene 10Be production rates for western Norway     

Brent M. Goehring  Øystein Strand Lohne  Jan Mangerud  John Inge Svendsen  Richard Gyllencreutz  Joerg Schaefer  Robert Finkel 《第四纪科学杂志》2012,27(1):89-96

We present a new regional calibration of the ¹⁰Be production rate from two well‐dated surfaces in southern Norway: a rock avalanche with ¹⁴C‐dated wood and a precisely dated Younger Dryas moraine. Calculated ¹⁰Be production rates are 4.26 ± 0.13 and 4.65 ± 0.14 at g^?1 a^?1 for the Lal/Stone and Lifton scaling models, respectively. Our regional production rate for southern Norway is 5% lower than the canonical global ¹⁰Be production rate with lower uncertainties. Our ¹⁰Be production rate agrees with regional ¹⁰Be production rates from north‐eastern North America and New Zealand. The ¹⁰Be production rate estimate presented here can be used to improve the precision and accuracy of exposure‐dated ice‐marginal features, as well as other surfaces, in northern Europe. Copyright © 2011 John Wiley & Sons, Ltd.  相似文献   

High-resolution body wave tomography beneath the SVEKALAPKO array – II. Anomalous upper mantle structure beneath the central Baltic Shield     

Senén Sandoval  Edi Kissling  Joerg Ansorge  the SVEKALAPKO Seismic Tomography Working Group 《Geophysical Journal International》2004,157(1):200-214

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Paleomagnetic investigations of the tertiary and quaternary rocks: IX The pliocene of southeast Sicily and some Cretaceous rocks from Capo Passero     

Prof. C. B. Gregor  Prof. Dr. Alan E. M. Nairn  Dr. Joerg F. W. Negendank 《International Journal of Earth Sciences》1975,64(1):948-958

A sampling of Plio-Pleistocene and Upper Cretaceous basalts in SE Sicily yielded the following informationAssuming that the Cretaceous direction is reversed, the confidence oval for the virtual pole overlaps that for the Cretaceous pole of Africa determined from the Mlanje Syenite byMcElhinny et al. If SE Sicily was attached to Africa when these Upper Cretaceous lavas erupted, this result implies that extensive relative movement between the two is not likely to have occurred subsequently.

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Zusammenfassung Die Aufsammlung und Untersuchung plio-pleistozäner und oberkretazischer Basalte in SE-Sizilien ergab die folgende paläomagnetische InformationUnter der Annahme einer inversen kretazischen Feld-Richtung überlappt der Konfidenzkreis des virtuellen Pols den kretazischen magnetischen Pol für Afrika, der vonMcElhinny et al. an den Gesteinen des Mlanje Syenites bestimmt wurde.Wenn SE-Sizilien zur Zeit der Extrusion dieser oberkretazischen Laven an Afrika angeheftet war, dann besagt dieses Ergebnis, da\ eine extensive relative Bewegung zwischen diesen beiden schwerlich nacheinander stattgefunden hat.

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Résumé La compilation et l'analyse de basaltes d'âge plio-pleistocène et crétacique supérieur dans la SE-Sicile fournit l'information paléomagnétique suivanteDans l'acceptation d'un champ inversé au Crétacique, le cercle de confidence du pÔle virtuel recouvre le pÔle magnétique crétacique pour l'Afrique, tel queMcElhinny et al. l'ont déduit des roches de la Syénite de Mlanje. Si l'on rattache le SE de la Sicile à l'Afrique au moment de l'éruption de ces laves du Crétacique supérieur, ce résultat signifie qu'il est peu probable qu'un mouvement relatif extensif ait eu lieu entre les deux.

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