Erlangen 2022 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 42: Laser and Laser Applications
Q 42.4: Poster
Mittwoch, 16. März 2022, 16:30–18:30, P
Paleoclimate Reconstruction with the ArTTA Quantum Technology — •David Wachs1,2, Julian Robertz1, Yannis Arck2, Florian Meienburg1,2, Florian Freundt2, Werner Aeschbach2,3, and Markus Oberthaler1 — 1Kirchhoff Institute for Physics, Heidelberg, Germany — 2Institute of Environmental Physics, Heidelberg, Germany — 3Heidelberg Center for the Environment, Heidelberg, Germany
The ArTTA method for measuring 39Ar concentrations represents an applied quantum technology to perform age dating of environmental samples. The isotope with its half life of 269 years uniquely enables dating in the age range between 150 and 1000 years. However, the very low isotopic abundance of about 10−16 sets high demands on the measurement method. Applied to different environmental archives the age itself can provide information about environmental changes and processes. However, combining the dating method with information obtained from other tracers can help to shed light on past conditions in certain environments.
In the past years several sampling and measurement campaigns involving 39Ar and aiming at paleoclimate reconstruction have been realized. Firstly, samples obtained from groundwater were analyzed towards their age distribution and additionally their recharge temperatures. Secondly, alpine glacier ice was sampled and measured with the goal of reconstructing the impact of climate fluctuations at higher altitudes. Altogether such studies provide the opportunity to better understand climate fluctuations of the last millennium.