Multi-proxy analysis of sediment cores from Lake Caldeirão (Azores archipelago, Portugal)

• Main Authors: Raposeiro, Pedro Miguel, Hernández, Armand, Gonçalves, Vítor, Bao, Roberto, Sáez, Alberto, Shanahan, Timothy M, Rúbio, Maria Jesus, Vázquez-Loureiro, David, Giralt, Santiago
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Accumulation rate; coprophilous fungi spores; macrophytes seeds; polycyclic aromatic hydrocarbons; Aerophilous diatoms; Age; AMS 14C dating on pollen concentrates; Clam routine on R; Arboreal pollen; Caldeirao_2017; Carbon; organic; total; total/Nitrogen; total ratio; Carbon dioxide; partial pressure; blood; standard error; Charcoal; flux; Charcoal as a Fire Proxy (Whitlock; 2005; in Smol et al; Tracking Environmental Change Using Lake Sediments Terrestrial; Algal; and Siliceous Indicators); Chironomid analysis (Brooks et al; 2007; The identification and use of Palaeartic Chironomid Larvae in Palaecology); Chironomini; Chromatography; Diatom analysis (Battarbee; 1986; in Berglund; Handbook of Holocene Pal.); Diatoms; benthic; planktic; GCUWI; Gravity corer; UWITEC; Juniperus; Lake Caldeirão; Berglund; North Atlantic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.933730; https://doi.org/10.1594/PANGAEA.933730

The Azores archipelago is a group of nine oceanic volcanic islands located in the mid-North Atlantic, roughly 1500 km from Europe and 1900 km from America. Lake Caldeirão is situated in the central caldeira of Corvo Island at 399 m altitude. A coring campaign was conducted in June 2017 using a 60mm diameter UWITEC gravity corer from UWITEC floating platform retrieving a core (4.60 m long) located in the deepest part of the lake. The core was dated using ¹⁴C and produced a multi-proxy dataset of geochemical and biological analyses that we used to uncover paleoenvironmental changes on Lake Caldeirão in the last 1500 years