Research project

Project fact sheet

Clumped-Isotope on ostracod shells: a new paleothermometer in continental environments

Project researcher(s): 
Dr Marta Marchegiano
Project supervisor(s): 
Dr C├ędric M. John
January, 2019 - July, 2020

Paleotemperature reconstruction has always assumed an important role in understanding the cause of palaeoclimatic variability. However, despite more than half a century of studies, quantitative and well-constrained temperature reconstruction still remains very challenging.

Carbonate Clumped-isotope thermometer represents an exciting and very promising technique in constant evolution given its various advantages and important and unique information it provides in climatic studies. Notwithstanding the notable progress it could bring in terrestrial environments, this technique still remains poorly used in the latter, compared to marine records.

This study has a focus set on a pioneer application of clumped-isotope on freshwater ostracod shells in order to provide a new significant tool in continental palaeoclimatic reconstruction. This goal will be achieved by applying clumped-isotope on ostracod assemblages recovered along a 9m long sedimentary core retrieved from Lake Trasimeno (central Italy) and covering the last 47 ky cal BP.

This will represent a unique opportunity to develop a new paleotemperature reconstruction technique as well as important information in the understanding of the magnitude of temperature variations during glacial and interglacial periods in central Mediterranean area.