biogeociencias y cambio climático

Provenance and transport pathways of marine proxy-bearing particles (PASSAGE)

Reference: 101039348

Duration: 5 years. 01/09/2022-31/08/2027

Total budget: 1,499,766 €

Funding: European Research Council (ERC).

Principal Investigator: Blanca Ausín (IRNASA-CSIC).

Collaborating entities: ETH Zurich (Switzerland), University of Barcelona (Spain), University of Bremen, MARUM (Germany), IACT-CSIC (Spain), University of Portsmouth (UK), Portuguese Instituto for Sea and Atmosphere (Portugal), Alfred Wegener Institute (Germany), University of Salamanca (Spain).

Abstract:

Understanding the nature and pace of climate change in the future requires robust and accurate information on past Earth’s climate changes. Much of what we know about past short-climate variability stems from marine sediment sequences, whose sedimentary components provide an over-expanding array of paleoclimate proxies. The fundamental assumption underlying most paleoceanographic investigations is that the environmental signal encapsulated in marine sedimentary components reflects that of the overlying water column at the time of formation. However, evidence indicates asynchronous synthesis and transport from distal locations for co-deposited sediment constituents. Consequently, fundamental questions arise regarding the fidelity of paleoclimate records. This project aims to quantify the impact of hydrodynamic transport on proxy carriers and climate signals and to identify and account for biases in paleoclimate reconstructions.