PYROWIND Cruise, RV Hespérides

• Main Authors: Villanueva, Joan, CSIC - Unidad de Tecnología Marina (UTM)
• Format: Dataset
• Language: unknown
• Published: 2022
• Subjects: Oceanographic geographical features; Salvador; Cartagena; Brazil; Spain; Hesperides; research vessel; Atlantic Ocean; Southern Ocean; Air temperature; Wind speed and direction; Atmospheric humidity; Solar Radiation; Air pressure; Date and time; Salinity of the water column; Temperature of the water column; Transmittance and attenuance of the water column; Wind strength and direction; Vertical spatial coordinates; Pacific
• Online Access: http://hdl.handle.net/10261/339566; https://doi.org/10.20351/29HE20220426

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.