Tipping points in lake systems of the arid zone of Central Asia – Q-TiP
Influence of tipping points on landscape systemsV. Nottebaum
The Q-TiP project is funded by the German Minsitry of Education and Research, BMBF, for the period of October, 2016 to September, 2019. The appearance and desiccation of large central Asian lake systems is investigated within three sub-projects. In South Mongolia’s Gobi Desert, the sub-project “Influence of Tipping Points on the Landscape Systems” driven by our group and the working group for Neotectonics and Natural Hazards at the RWTH Aachen University, investigates the catchment of the Orog Nuur, which exhibits traces of strong neotectonic activity. In 1957, the region experienced a magnitude 8 earthquake with its epicenter only a few tens of km west of Orog Nuur. Sediment cascades and their archives are observed regarding the influence of tipping points. These thresholds may be climatically or tectonically controlled and their crossing may significantly influence the hydrological system of the lake and the landscape. The landscape around the lake is in a special focus: The interaction of fluvial, lacustrine and aeolian archives is investigated by sedimentological and geochronological means, thus delivering information about the landscape evolution during the last glacial cycle.V. Nottebaum
Reconstruction of the paleoenvironment
The work reconstructs the landscape history from the last Glacial to the late Holocene, while also tectonic influence is considered together with the colleagues from the group for neotectonics. From the local example at Orog Nuur general conclusions about the influence of tipping points on geomorphological processes in central Asian lake systems during the last glacial cycle will be derived.
In summer 2017, we went for four weeks on a field trip to Orog Nuur. At over 60 locations, surface and sediment sections were investigated and sampled. More than 30 OSL samples were taken for geochronological data of sediment deposition. In the main focus were beach ridges and associated fluvial, aeolian and lacustrine sediments.
|Duration||10/2016 - 09/2019|
|Project partners||Jorien van der Wal – Neotectonics and Natural Hazards, RWTH Aachen
Prof. Dr. Klaus Reicherter – Neotectonics and Natural Hazards, RWTH Aachen