The Boron Isotopic Composition of Foraminifera.
The boron isotopic composition of marine carbonates is expressed as δ11B is sensitive to the pH of the seawater in which they grew. pH is one variable of the ocean carbonate system and can be used to reconstruct atmospheric CO2. Click here to find out more.
Modern culture of coccolithus pelagicus – eachalga is ~14 µm across (photo credit: Samantha Gibbs).
The carbon isotopic composition of marine carbon.
The isotopic composition of carbon in algal biomarkers (e.g. alkenones, phytane) is a function of the CO2 content of the seawater in which the phytoplankton grew. This can be used to reconstruct past CO2. Click here to find out more.