We investigate proxy signals as obtained from the absolute and relative abundance of source-specific lipid compounds (biomarkers) such as archaeal and bacterial membrane lipids (so-called GDGTs), haptophyte derived alkenones and diatom related diols.

We analyze these proxies in suspended matter from surface waters and deeper in the water column (see figure below), as well as in surface sediments and downcore records.

By these means, we can reconstruct for example present and past sea surface and continental air temperatures and the variability of terrestrial derived organic matter input.