PYROWIND Cruise, RV Hespérides
PYROWIND Cruise (29HE20220426) carried out on the Research Vessel Hespérides in 2022. The aim of the project is to develop an innovative palaeo-proxy approach to investigate the natural range of variability of the Hadley circulation during past episodes of extreme warmth and cold. The approach relie...
Main Authors: | , |
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Format: | Dataset |
Language: | unknown |
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2022
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Online Access: | http://hdl.handle.net/10261/339566 https://doi.org/10.20351/29HE20220426 |
Summary: | PYROWIND Cruise (29HE20220426) carried out on the Research Vessel Hespérides in 2022. The aim of the project is to develop an innovative palaeo-proxy approach to investigate the natural range of variability of the Hadley circulation during past episodes of extreme warmth and cold. The approach relies on the exploitation as climate proxy of an untapped but widespread material in marine sediments: windborne pyrogenic carbon (PyC) derived from savannah and grassland fires in the tropics. Through the geochemical and isotopic spatial characterization of PyC, along with the analysis of mineral dust in the modern tropical deep ocean, and a PyC biogeochemical model, we will build an interpretative framework of PyC deposition in deep-sea sediments. Its application in Pliocene-Pleistocene sequences from the Atlantic and the Pacific will allow the reconstruction of past meridional and zonal shifts in the Intertropical Convergence Zone and the Southern hemisphere westerlies, and provide new constraints on the natural variability of the Hadley circulation and associated hydroclimates. |
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