Publication Date:
2024-06-12
Description:
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. In 2018, a sediment core was recovered from Lake Ginjal on Terceira island. A 3.5 m long sediment core was taken using a Russian chamber corer, 0.5 m long, with 5 cm diameter. Lake Ginjal occupies the bottom of a small crater at 390 m above sea level located in the plains of Achada, the oldest volcanic crater of Terceira island. Its maximum length and width are 120 m and 70 m, respectively, and its maximum water depth is 1 m. 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 550 years.
Keywords:
Accumulation rate, coprophilous fungi spores; Aerophilous diatoms; Age; AGE; AMS 14C dating on pollen concentrates; Clam routine on R; Arboreal pollen; Azores Archipelago; Carbon, organic, total; Carbon, organic, total/Nitrogen, total ratio; Carbon dioxide, partial pressure, blood, standard error; Charcoal, flux; Charcoal analysis (Whitlock & Larsen, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments); Chironomid analysis (Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology); Chironomini; Coccoliths, standard deviation; Diatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.); Diatoms, benthic; Diatoms, planktic; Ginjal_2018; Lake Ginjal, Terceira Island; Mass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS; multiproxy; Nitrogen, total; oceanic island; Orthocladiinae; Pollen, herbs; Pollen, shrubs; Pollen analysis (Bennett & Willis, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments); RUSC; Russian corer; Shallow lake; Tanytarsini; δ13C; δ15N
Type:
Dataset
Format:
text/tab-separated-values, 1058 data points
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