CRC lecture by Igor Obreht (MARUM Bremen)

CRC-Lecture

Date/Time
Date(s) - 30/11/2020
4:00 pm - 5:00 pm

Categories


Micrometer-scale biomarker imaging on laminated sediments – examples of annually resolved proxy records of Western Europe and Mediterranean paleoclimate

 

by Igor Obreht,
MARUM – Zentrum für Marine Umweltwissenschaften der Universität Bremen

Understanding the climate variability from geological past is of great relevance for understanding the climate of the future world. However, conventional analytical methodology applied on classical geological archives does not provide access to information on annual and decadal patterns of climate variability. This is unfortunate because access to such records could reveal climate patterns that can be directly compared to the ongoing and projected climate warming of the 21st century. However, advance in mass spectrometry imaging (MSI) provided an opportunity to detect and visualize the distribution of biomarkers on intact sediment core sections with an unprecedented level of details. MSI is a laser-based technique recently introduced for the analysis of sediment core sections that collects mass spectra of organic compounds at µm-scale spatial resolution and provides a unique opportunity for generating biomarker-based proxy records in exceptionally high-resolution. In this presentation, I will introduce you to novel analytics that was applied on a finely laminated geological archive to generate annually resolved continuous millennial-scale records indicative of Earth’s climate variability during the Younger Dryas in Western Europe and last warmer-than-present interglacial in the Mediterranean.

 

 

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