Dear All,
We are very pleased to announce the next Landscapes Live online seminar of the Spring 2022 block by Charlotte Prud'Homme (University of Lausanne) that will occur on Thursday, March 10th at 3pm GMT (= 3pm in London / 4pm in Paris-Berlin / 6pm in Moscow / 8.30pm in Delhi / 11pm in Beijing / 10am in New York / 7am in Los Angeles) on:
"Long-term climate change in continental environments: An approach combining geochemistry and dating of continental carbonates"
Abstract: Earth's climatic evolution over the last 5 million years is primarily understood from the perspective of marine mechanisms. While changes in ocean circulation go a long way towards explaining the transport of moisture to continents, the role of terrestrial feedbacks in the opposite direction remains largely unexplored. Towards this, one of the major research objectives is to highlight the response of continental environments to climatic variations over a range of time scales. In the continental domain, aeolian deposits constitute the most extensive sedimentary archive on the Eurasian continent. These deposits are not only sensitive to abrupt climatic variations of the last glacial period in the form of loess-palaeosol sequences, but also record changes on longer time scales, such as that seen in the sedimentary sequences of the Plio-Pleistocene transition.
Various isotope geochemical approaches have been developed on different types of carbonates extracted from loess sequences typical of Western Europe periglacial environments and arid Central Asia. These include calcite granules produced by earthworms, calcified root cells formed by the biomineralization of living roots (mainly grass) and pedological concretions. These carbonates are particularly sensitive to environmental changes. In this talk, I will discuss these approaches, with the aim of : firstly, to gain a better understanding of climate dynamics in Central Asia over the past five million years and demonstrating that the aridification of Central Asia was associated with an intensification of the aeolian processes, which in turn was modulated by the interaction between the climatic systems of mid- (Westerlies) and high latitudes (Siberian High). And, secondly, to quantify past temperatures and precipitation during the Dansgaard-Oeschger interstadials in the continental domain.
This seminar will be live on Zoom and open to anyone interested (with a limit of 300 participants). Register in advance for this meeting : https://ucmerced.zoom.us/meeting/register/tZEsdeqgqzopE9ShWg9A_HE80Itnyfet9C34 (after registering, you should receive a confirmation email containing information about joining the meeting).
The Landscapes Live online seminar series will then continue the following weeks with:
· Thursday 17th March at 3 pm GMT/ 4 pm CET: Anne Rowan, University of Sheffield
· Thursday 24th March at 3 pm GMT/ 4 pm CET: Brent Goehring, Tulane University
· Thursday 31th March at 3 pm GMT/ 4 pm CET: Stéphane Bonnet, University of Toulouse
More information on these talks as well as the videos of previous talks are available on our website (https://www.landscapeslive.org/).
Landscapes Live is the EGU Geomorphology Division's virtual webinar series focused on sharing exciting geomorphology research throughout the international scientific community. Feel free to contact us if you have questions or suggestions: landscapesliveseminar@gmail.com
Best wishes,
The Landscapes Live team
