name_de: Computer-Tomograph
name_en: Micro computer tomograph
model: Phoenix v|tome|x s 240
url: https://www.gzn.nat.fau.de/palaeontologie/ausstattung/computer-tomographie-labor/
manufacturer: General Electric
year: 2016
location_de: Erlangen
location_en: Erlangen
usage_de: Auch für externe Nutzer
usage_en: For external users too
description_de:
Gerät zur zerstörungsfreien Untersuchung von Proben aus unterschiedlichsten Disziplinen:
Paläontologie
Geologie
Biologie
Archäologie
Medizin
Mineralogie
Materialwissenschaften
Metallurgie
Ingenieurswissenschaften
Probengröße bis maximal 25 x 35 cm bei bis zu 10 kg Masse.
Die erreichbare Auflösung hängt u.a. von der Probengröße ab und geht bis etwa 0,8 µm.
description_en:
feature_de:
Duale Röhre: 240 kV & 180 kV
feature_en: <p>Dual source: 240 kV & 180 kV<br /></p>
pictures: <QuerySet []>
cards: <QuerySet [<Card: Card of Christian, Schulbert: (True)>]>
funding_sources: <QuerySet [<FundingSource: FundingSource: cris_id: 139453943, name: Deutsche Forschungsgemeinschaft (DFG), abbreviation: DFG>]>
projects: <QuerySet [<Project: Exploring the potential of coralline algae as climate proxy and for climate model evaluation: a Southern Hemisphere case study of New Zealand, , , , Coupled atmosphere/ocean general circulation models, or global climate models (GCMs) in short, are our most important tools for projecting climate into the future. In addition, they provide input for regional atmospheric models that translate global climate change to regional and local scales where humans face the impacts. Owing to this importance, GCMs must be evaluated against the observed past climate as thoroughly as possible, where one focus is the so-called historical period from 1850 to present. However, the evaluation task is difficult for the period of World War II and earlier due to a frequent lack of reliable observations. The outlined problem is exacerbated for the Southern Hemisphere, which has been notoriously understudied in comparison to the climate of the Northern Hemisphere. --- The present project proposes to utilize a rather recently discovered proxy archive (crustose coralline algae, CCA) for extending the observational record of the climatic environment of New Zealand back to ~1850, and exploit the new data set for the benefit of GCM evaluation, regional atmospheric modeling, and improved understanding of climate system functioning. CCA has a number of advantages compared to other proxy archives (e.g., easy retrieval, high temporal resolution, worldwide distribution). In the first part we will collect CCA offshore New Zealand and extract geochemical signals that allow us to reconstruct ocean temperatures back to the 19th century (the large-scale signal). Second, this new information will be employed in GCM evaluation to reveal their skill of representing large-scale climate of New Zealand. And third, regional numerical atmospheric modeling will be conducted to test whether the addition of the CCA-based criterion to the GCM evaluation ultimately adds value to regional climate modeling. A focus here will be on high-altitude climate and glacier variability in the Southern Alps (the impact signal). The regional modeling will also allow us to unravel the physical mechanisms that determine the potential of CCA as a climate proxy in New Zealand. --- The proposed project bundles the expertise of three partners across the fields of paleoclimate, Southern Hemisphere climatology and measurements, and climate modeling, which strongly supports the project goals due to the collaboration. The implications of the potential results, however, will go beyond the specific case study. Results will demonstrate how to rigorously combine the GCM and climate proxy worlds in a systematic framework, highlighting the role of CCA, and how the said combination can enhance regional climate modeling down to the local scale. These points are of generic importance for climate modeling and climate impact research. <br />, <p>Coupled atmosphere/ocean general circulation models, or global climate models (GCMs) in short, are our most important tools for projecting climate into the future. In addition, they provide input for regional atmospheric models that translate global climate change to regional and local scales where humans face the impacts. Owing to this importance, GCMs must be evaluated against the observed past climate as thoroughly as possible, where one focus is the so-called historical period from 1850 to present. However, the evaluation task is difficult for the period of World War II and earlier due to a frequent lack of reliable observations. The outlined problem is exacerbated for the Southern Hemisphere, which has been notoriously understudied in comparison to the climate of the Northern Hemisphere. --- The present project proposes to utilize a rather recently discovered proxy archive (crustose coralline algae, CCA) for extending the observational record of the climatic environment of New Zealand back to ~1850, and exploit the new data set for the benefit of GCM evaluation, regional atmospheric modeling, and improved understanding of climate system functioning. CCA has a number of advantages compared to other proxy archives (e.g., easy retrieval, high temporal resolution, worldwide distribution). In the first part we will collect CCA offshore New Zealand and extract geochemical signals that allow us to reconstruct ocean temperatures back to the 19th century (the large-scale signal). Second, this new information will be employed in GCM evaluation to reveal their skill of representing large-scale climate of New Zealand. And third, regional numerical atmospheric modeling will be conducted to test whether the addition of the CCA-based criterion to the GCM evaluation ultimately adds value to regional climate modeling. A focus here will be on highaltitude climate and glacier variability in the Southern Alps (the impact signal). The regional modeling will also allow us to unravel the physical mechanisms that determine the potential of CCA as a climate proxy in New Zealand. --- The proposed project bundles the expertise of three partners across the fields of paleoclimate, Southern Hemisphere climatology and measurements, and climate modeling, which strongly supports the project goals due to the collaboration. The implications of the potential results, however, will go beyond the specific case study. Results will demonstrate how to rigorously combine the GCM and climate proxy worlds in a systematic framework, highlighting the role of CCA, and how the said combination can enhance regional climate modeling down to the local scale. These points are of generic importance for climate modeling and climate impact research.<br /></p>, 2021-02-01, 2024-09-30, , 2024-09-30, Third party funded individual grant, True>, <Project: Size reductions during hyperthermal events: early warnings of environmental deterioration or signs of extinction? (EarlyWarn), , , , <p>Size reductions in successive fossil assemblages during times of extinction are major features visible across a variety of temporal and spatial scales. The underlying environmental drivers and mechanisms are however still debated. In various cases, size responses predate the main extinction pulse suggesting that they might signal early environmental disruptions. The project proposed here aims to explicitly model size changes in a sequence stratigraphic framework to disentangle the local paleoenvironmental influences on these patterns from global ones. This approach will focus on within-facies and between-facies comparisons of mollusk and brachiopod assemblages of Permian-Triassic sections in Iran and various European Pliensbachian-Toarcian sections, hence covering a wide range of paleoenvironmental and preservational contexts before and across extinction events. These approaches are necessary to quantitatively disentangle the relative contribution of climate-related stressors and nutrient availability in driving patterns when filtering out potential collection and stratigraphy biases. The final part of the project will compare our newly collected high-resolution data with newly appended large size datasets considering appropriate facies, sequence stratigraphic and geochemical context to understand their relative contribution in the first comprehensive meta-analysis on these aspects of miniaturization (“Lilliput effect”). These datasets will also be used to disentangle the relative contribution of within-species size reductions, size-selective extinction/immigration and origination/immigration in driving size fluctuations during background conditions as well as during events ranging from minor biological crises to mass extinctions associated with hyperthermal events.<br /></p>, , 2019-12-01, , , 2022-12-01, Third party funded individual grant, True>, <Project: FOR 2332: Temperature-related stresses as a unifying principle in ancient extinctions (TERSANE) (FOR 2332), FOR 2332, , , <p>
Anthropogenic global warming is regarded as a major threat to species and ecosystems worldwide. Predicting the biological impacts of future warming is thus of critical importance. The geological record provides several examples of mass extinctions and global ecosystem pertubations in which temperature-related stresses are thought to have played a substantial role. These catastrophic natural events are potential analogues for the consequences of anthropogenic warming but the Earth system processes during these times are still unexplored, especially in terms of their ultimate trigger and the extinction mechanisms. The Research Unit TERSANE aims at assessing the relative importance of warming-related stresses in ancient mass extinctions and at evaluating how these stresses emerged under non-anthropogenic conditions. An interdisciplinary set of projects will combine high-resolution geological field studies with meta-analyses and sophisticated analysis of fossil occurrence data on ancient (suspect) hyperthermal events to reveal the rate and magnitude of warming, their potential causes, their impact on marine life, and the mechanisms which led to ecologic change and extinction. Geochemistry, analytical paleobiology and physiology comprise our main toolkit, supplemented by biostratigraphy, sedimentology, and modelling.</p>, , 2016-01-01, , , 2019-01-01, Third Party Funds Group - Overall project, True>]>
publications: <QuerySet [<Publication: Following Changes at the Solid/Liquid Interface for Large Microplastic Particles by Streaming Potential>, <Publication: Instantiations of Multiscale Kinship in Pressing‐Defect Distributions in Yttria‐Stabilized Zirconias by Powder Partitioning>, <Publication: Coring tools have an effect on lithification and physical properties of marine carbonate sediments>, <Publication: Influence of different CA2/CA-ratios on hydration degree, AH3 content and flexural strength investigated for a binder formulation of calcium aluminate cement with calcite>, <Publication: Structural and geochemical assessment of the coralline alga Tethysphytum antarcticum from Terra Nova Bay, Ross Sea, Antarctica>, <Publication: Spurenlesen in der Vergangenheit - die Burghöhle Wolfsegg als Treffpunkt für Mensch, Höhlenlöwe und Co.>, <Publication: Evolution of the particle size distribution of tricalcium silicate during hydration by synchrotron X-ray nano-tomography>, <Publication: Morphological response accompanying size reduction of belemnites during an Early Jurassic hyperthermal event modulated by life history>, <Publication: Biostratigraphy and sequence stratigraphy of the Toarcian Ludwigskanal section (Franconian Alb, Southern Germany)>, <Publication: Modern brackish bryostromatolites (“bryoliths”) from Zeeland (Netherlands)>, <Publication: Growth interruptions in Arctic rhodoliths correspond to water depth and rhodolith morphology>, <Publication: Microfacies analysis and 3D reconstruction of bioturbated sediments in the calcarenite di Gravina formation (southern Italy)>, <Publication: Deeper insights: The potential of X-ray micro-computed tomography (μCT) in microplastic studies>, <Publication: Extreme reefs: Analyses of modern bryostromatolite ("bryolith") reefs from marginal environments in the Netherlands with comparisons to ancient analogues>, <Publication: Decoding sea surface and paleoclimate conditions in the eastern Mediterranean over the Tortonian-Messinian Transition>, <Publication: A rare find: protoconch in Cretaceous nerineid “gastropod dinosaurs”>, <Publication: Reef Fish Beware! Aggressive Mimicry in a Pycnodontid?>, <Publication: Morphological characters and ontogenetic development of deep-sea species of the genus Caryophyllia>, <Publication: 3D morphological analysis of cement over the first 24 hours of hydration by holographic and near-field ptychographic-tomography>, <Publication: Microplastic pollution as a possible threat for an arctic reef system and its association of ecosystem engineers>, '...(remaining elements truncated)...']>
fobes: <QuerySet []>
orgas: <QuerySet [<Organisation: Lehrstuhl für Paläoumwelt, <p>
Paleobiology and Paleoenvironments</p>, Erlangen, 91054, Loewenichstraße, 2999-12-31, GeoZentrum Nordbayern, True>]>
