This project will apply carbon and oxygen isotope geochemistry (d13C and d18O) on carbonate sediments, in order to perform detailed paleocenaographic reconstructions for the Eocene-Oligocene period. High-resolution d13C and d18O records will be obtained from several archives in different part of the world. A robust chemostratigraphic reference curve will be established and the major paleoceanographic and paleoclimatic events will be characterized from local to global scale. Further sedimentological and geochemical analyses will complement the paleoceanographic interpretation. It expected to obtain an enhanced reconstruction of the Eocene-Oligocene climatic history and new insights on themechanisms that drove the global climate during the transition from greenhouse to icehouseconditions at that time. This Project proposes to obtain and examine high-quality, continuous stratigraphic records of stable isotopes from targeted time intervals to better understand (1) how physical and biological systems responded to elevated and varying levels of atmospheric CO2, and (2) how ocean circulation and carbon cycle behaved during warmer climates. An integrated data-model science approach will offer new insight into the onset, early evolution, and subsequent behavior of oceans and ice sheets in Antarctica inresponse to underlying tectonic change, landscape evolution, orbital forcing, and varying levels of atmospheric CO2. Particular attention will be given to the link between tectonic and oceanographic changes; the link between orbital forcing, C-cycle, and climate; characterization of the rapid "hyperthermals"; and calibration of the Milankovitch orbital signal between isotopes and magnetic properties in sedimentary archives. This work is tightly connected to the ongoing research of Prof. Luigi Jovane, carried out at the Oceanographic Institute of the University of Sao Paulo in the last years.
News published in Agência FAPESP Newsletter about the scholarship: