API src

Found 3 results.

Sperberkartierung

Mit Hilfe des Sperbermonitorings werden in Zusammenarbeit mit den Bürger*innen Kölns Hinweise über den Sperber und seine Bruterfolge ermittelt, um bei negativen Entwicklungen Schutzmaßnahmen ergreifen zu können. Die Größe und die Zusammensetzung der Sperber-Bestände können Hinweise über den Zustand der in Köln lebenden Vögel geben. Die Beobachtung wird dabei helfen, den Zustand der Sperber-Population in Köln zu beurteilen. Den Link zur Übermittlung Ihrer Sichtungs-Angaben finden Sie auf der Website unter dem Punkt "Meldestelle Greifvögel". Im unteren Abschnitt der Seite finden Sie weitere interessante Informationen zum Sperber sowie eine detaillierte Beschreibung über das Erscheinungsbildes des kleinen Jägers in unserer großen Stadt.

Surface deformation and topography data from analogue modelling experiments addressing triaxial tectonics in regions of distributed extension

This data set includes the results of high-resolution digital elevation models (DEM) and digital image correlation (DIC) analysis applied to analogue modelling experiments. Twenty generic analogue models are extended on top of a rubber sheet. Two benchmark experiments are also reported. Detailed descriptions of the experiments can be found in Liu et al. (submitted) to which this data set is supplement. The data presented here are visualized as topography and the horizontal cumulative surface strain (principal strain and slip rake).

Overviews and videos of top view imagery, topography data and DIC analysis results from analogue models of basin inversion

This data set includes videos depicting the surface evolution (time-lapse photography, topography data and Digital Image Correlation [DIC] analysis) of 11 analogue models, divided in three model series (A, B and C), simulating rifting and subsequent inversion tectonics. In these models we test how orthogonal or oblique extension, followed by either orthogonal or oblique compression, as well as syn-rift sedimentation, influenced the reactivation of rift structures and the development of new inversion structures. We compare these models with an intracontinental inverted basin in NE Brazil (Araripe Basin). All experiments were performed at the Tectonic Modelling Laboratory of the University of Bern (UB). We used an experimental set-up involving two long mobile sidewalls, two rubber sidewalls (fixed between the mobile walls, closing the short model ends), and a mobile and a fixed base plate. We positioned a 5 cm high block consisting of an intercalation of foam (1 cm thick) and Plexiglas (0.5 cm thick) bars on the top of the base plates. Then we added layers of viscous and brittle analogue materials representing the ductile and brittle lower and upper crust in our experiments, which were 3 cm and 6 cm thick, respectively. A seed made of the same viscous material was positioned at the base of the brittle layer, in order to localize the formation of an initial graben in our models. The standard model deformation rate was 20 mm/h, over a duration of 2 hours for a total of 40 mm of divergence, followed by 2 hours of convergence at the same rate (except for Models B3 and C3, since the oblique rifting did not create space for 40 mm of orthogonal inversion). For syn-rift sedimentation, we applied an intercalation of feldspar and quartz sand in the graben. Model parameters and detailed description of model set-up are summarized in Table 1, and results and their interpretation can be found in Richetti et al. (2023).

1