Oman

Neuigkeiten aus dem Arbeitsgebiet


Projekte


DFG HO 2550/11-1: "Quantifizierung der relativen Meeresspiegelentwicklung entlang der Küsten im Oman (Arabische See)"

Im Vordergrund des Projektes stehen küstenmorphologische Untersuchungen im Oman. Einerseits werden hier langfristige Änderungen beobachtet. Diese stehen im Zusammenhang mit globalen, eustatischen Veränderungen sowie lokalen, neotektonisch-isostatisch induzierten Bewegungen.

An der Ostküste Omans existieren Terrassen, die als Brandungsplattformen angelegt und anschließend gehoben wurden. In einer vorläufigen Untersuchung konnte bereits nachgewiesen werden, dass die Terrassen im Quartär entstanden. Ziel des Projektes ist es, die Hebungsbeträge zu ermitteln sowie den Mechanismus für die Hebung zu beschreiben. Die Arbeitshypothese ist, dass eine Kombination aus der plattentektonischen Konfiguration (Kollision der arabischen mit der eurasischen Platte) und lokalen isostatischen Faktoren (Serpentinisierung des Ophiolits) verantwortlich für die zu beobachtende Deformation ist.

Der zweite Schwerpunkt des Projektes ist die Dokumentation von Küstenablagerungen, die im Zusammenhang mit extremen Wellenereignissen stehen. Als solche kommen sowohl Tsunamis als auch Sturmfluten in Frage.

Das Projekt basiert auf Geländearbeiten bei denen klassisch geologisch kartiert wird, unterstützt durch hochauflösende Verfahren (Laserscanner, differentielles GPS, Bodenradar, Luftbildauswertung).

ORG/GUTECH/EBR/14/014: Quaternary sea-level changes in Oman

Start of project:   April 2015
End of project:    March 2018

Understanding the local, regional, and global effects of sea-level change will remain at the forefront of scientific research for decades to come as coastal communities are increasingly exposed to the threat from instantaneous and long-term sea-level rise.

This projects aims at the quantification of sea level related long-term changes at the coastline of Oman. We propose a holistic high-resolution study that allows evaluating the vulnerability of the coastal areas, the communities as well as the infrastructure in terms of future changes.

Long term changes in sea-level due to solid earth’s response to climate changes as well as tectonics are the background rate upon which the hazard of anthropogenic sea level change and extreme inundations from tsunamis and storms must be superimposed. Instrumental records of sea-level rise provide unmatched resolution when investigating modern coastal hazards. However, the short time series obtained from such data likely miss the largest and lowest frequency events that are critical for understanding the maximum possible hazard. Hence, the only way to overcome this shortage is to study the geological record as proposed here.

Only this approach gives us the ability to understand hazards over timescales of centuries to thousands of years. Instrumental and geological data must be coupled to develop the necessary holistic view. Historical and archaeological records further help to connect these temporally disparate records.

IGCP Project 639 "Sea Level Change from Minutes to Millennia"

Start of project:   2015
End of project:    2020

Sea-level changes over timescales from minutes to millennia are of great concern to coastal communities. Long-term changes in sea level due to the solid earths response to glaciation and tectonics are the background rate upon which the hazard from anthropogenic sea-level change and extreme inundation from tsunamis and storms must be superimposed. Short-term measurements from instrumental and historical records provide short glimpses at the hazard posed by sea-level change over varying temporal scales but must be placed within the long-term context that only geological and archaeological records provide.

This project will provide a platform for the development of integrated records of sea-level change and coastal hazards obtained from instrumental, historical, archaeological, and geological records. This project will place a particular focus on integrating disparate records in growth regions for science, namely in Africa, South America, and the Middle East, expanding upon previous coastal (495, 588) and delta projects (475) that focused for the most part on Europe and Asia. Further, this project expands upon the research theme of project 588 that focused on the impacts of humans on coastal landscapes. This project will result in a coastal hazard toolkit that can be applied by those most at risk from future coastal inundation.

So far, two meetings took place, the first in Oman in 2016 and the second in South africa.

Impressionen


  • Michaela und Basti in Südafrika beim zweiten IGCP 639 Meeting