100 [Hundert] Jahre Echolot : die Tiefe hören ; 4000 Jahre Tiefenmessung im Ozean

Ausstellung „Die Tiefe hören“: Sie beschäftigt sich mit der Entwicklung des Echolots, für das der Kieler Physiker und Unternehmer Alexander Behm vor genau 100 Jahren das erste Patent erhielt. Echolote sind bis heute nicht nur wichtige Hilfsmittel der Schifffahrt, sondern auch unverzichtbare Werkzeuge bei der Erkundung der Ozeanböden. Die Ausstellung zeigt die Entwicklung der Tiefenmessung im Ozean von den Handloten im alten Ägypten bis zur Vermessung der Wasseroberfläche mit Satelliten sowie mit Autonomen Tiefseegeräten, die mit modernen Fächerecholoten ausgestattet sind

Late-Holocene Atlantic bottom-water variability in Igaliku Fjord, South Greenland, reconstructed from foraminiferal faunas

A high-resolution record of late-Holocene subsurface water-mass characteristics in outer Igaliku Fjord, South Greenland, is presented based on benthic foraminifera faunas from core PO 243–451 collected from a water depth of 304 m. Strati” cation with Atlantic water masses present in the lower part of the water-column is suggested to have prevailed during the last 3200 cal. years, except for a period referred to as the‘Mediaeval Warm Period’ (MWP). During the MWP (c. ad 885–1235) the outer part of Igaliku Fjord experienced enhanced vertical mixing and a high hydrodynamic energy level which we ascribe to increasing wind stress through this period, corresponding to the period of the Norse settlement. The transition from the MWP to the‘Little Ice Age’ (LIA) shows a two-step pattern with a short climatic amelioration around AD 1520 before maximum cooling occurred. The intensified wind stress and the overall environmental change are suggested to have contributed to the loss of the Norse settlement in Greenland. Periods with strong stratification and marked in uence of Atlantic subsurface water masses around 2.6, 1.3 ka BP and during the LIA are correlated to North Atlantic Holocene ice-rafting events reported by Bond et al. (1997)

Echolot - Die Tiefe hören, 4.000 Jahre Tiefenmessung im Ozean: die Entwicklung des Echolots und seine Bedeutung für das Verständnis des Systems Erde

Diese Broschüre und die gleichnamige Ausstellung befassen sich mit der Entwicklung des Echolots, für das der Kieler Physiker und Unternehmer Alexander Behm im Jahr 1913 das erste Patent erhielt. Erfahren Sie mehr über die Geschichte der Tiefenmessung im Ozean – von den ersten Handloten im alten Ägypten über die dampfgetriebenen Lotmaschinen des 19. Jahrhunderts, der Entwicklung der ozeanischen Tiefenkarten bis hin zur heutigen Vermessung des Meeresbodens mit modernen Fächerecholoten

Seismische Vermessung der verlandeten Buchten des Medione und Gorgo Cotone. Hinweise zur Lage des Hafens der antiken Stadt Selinunt, Sizilien = Seismic survey of the silted bays of the medione and gorgo cotone rivers. Evidence of the location of the harbour of the Ancient City of Selinus, Sicily

Seismic survey of the silted bays of the Medione and Gorgo Cotone rivers. Evidence of the location of the harbour of the ancient city of Selinus, Sicily. The ruins of the ancient city of Selinus are located on the southern coast of Sicily on a limestone plateau bounded to the east and west by two respective silted bays or riverbeds. So far it has been impossible to archaeologically determine which of these bays served as a harbour in antiquity. In order to explore the depth structure of the silted bays, we performed two seismic surveys with shear waves, reaching penetration depths of approximately 25 m. The seismic measurements were calibrated by drillings. In th upper 15 m, the two bays differ strongly in seismic structure. The eastern bay (Gorgo Cotone valley) must be considered as a former lagoon that was connected to the sea. When the city of Selinus was founded, this lagoon was already silted at its shore, and it was banked up artificially for the construction of the eastern city quarter up to the city wall. The western bay (Modione valley) shows uniform fluvial sedimentation. A possibly artificial banking can also be found at the western foot of the city hill, dipping steeply (∼20°) from the city wall down to the Modione valley. The comparison of both locations shows that the eastern bay is a more plausible location of the harbour of Selinus, due to its protected lagoon and remains of construction