Multi-proxy analysis of sediment cores from Lake Azul (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: Azores Archipelago; deep lake; multiproxy; oceanic island; AGE; Age; Aerophilous diatoms; Diatoms, benthic; Carbon dioxide, partial pressure, blood, standard error; Diatoms, planktic; Chironomini; Orthocladiinae; Tanytarsini; Tanypodinae; Carbon, organic, total/Nitrogen, total ratio; Carbon, organic, total; δ13C; Nitrogen, total; δ15N; Accumulation rate, 5beta-cholestan-3beta-ol; Accumulation rate, 5alpha-stigmastan-3beta-ol; Gravity corer, UWITEC; Diatom analysis Battarbee, 1986, in Berglund, Handbook of Holocene Pal.; Chironomid analysis Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology; Mass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS; Gas chromatography - Mass spectrometry GC-MS; Development of a CCAMLR Marine Protected Area in the Antarctic Weddell Sea WSMPA; Antarctic; The Antarctic; Weddell Sea; Weddell; Berglund; Antarc*; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.933710; https://doi.pangaea.de/10.1594/PANGAEA.933710

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 Azul located in São Miguel island has a surface area of 4.35 km, 28m of maximum depth and is located at 259m above sea level. A coring campaign was conducted in September 2011 using a 60mm diameter UWITEC gravity corer from UWITEC floating platform retrieving a Core AZ11_02 (1.70 m long) located in the deep basin of the lake (27m depth). 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 Azul in the last 660 years. ...