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Raposeiro, Pedro Miguel; Ritter, Catarina; Salcedo, Marina; Aguiar, Nicole; de Boer, Erik J; Bao, Roberto; Sáez, Alberto; Giralt, Santiago; Gonçalves, Vítor (2021): Multi-proxy analysis of sediment cores from Lake Ginjal (Azores archipelago, Portugal). PANGAEA, https://doi.org/10.1594/PANGAEA.933674

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Abstract:
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.
Keyword(s):
Azores Archipelago; multiproxy; oceanic island; Shallow lake
Funding:
Fundação para a Ciência e Tecnologia (FCT), grant/award no. PTDC/CTA-AMB/28511/2017: WHEN WERE THE AZORES ARCHIPELAGO REALLY COLONIZED? A HIGH-RESOLUTION PALEOLIMNOLOGICAL APPROACH
Coverage:
Latitude: 38.695278 * Longitude: -27.158056
Date/Time Start: 2018-08-05T00:00:00 * Date/Time End: 2018-08-05T00:00:00
Minimum Elevation: 390.0 m * Maximum Elevation: 390.0 m
Event(s):
Ginjal_2018 * Latitude: 38.695278 * Longitude: -27.158056 * Date/Time: 2018-08-05T00:00:00 * Elevation: 390.0 m * Recovery: 3.5 m * Location: Lake Ginjal, Terceira Island * Method/Device: Russian corer (RUSC)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1AGEAgeka BPRaposeiro, Pedro MiguelGeocode
2AgeAgea ADGiralt, SantiagoAMS 14C dating on pollen concentrates; Clam routine on R
3Aerophilous diatomsAeroph diatom%Gonçalves, VítorDiatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.)
4Diatoms, benthicDiatom benthic%Gonçalves, VítorDiatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.)
5Carbon dioxide, partial pressure, blood, standard errorpCO2 blood std e±Gonçalves, VítorDiatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.)
6Diatoms, plankticDiatom plank%Gonçalves, VítorDiatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.)
7ChironominiChironomini%Raposeiro, Pedro MiguelChironomid analysis (Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology)Chironomidae - Chironomini
8OrthocladiinaeOrthocladiinae%Raposeiro, Pedro MiguelChironomid analysis (Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology)Chironomidae - Orthocladiinae
9TanytarsiniTanytarsini%Raposeiro, Pedro MiguelChironomid analysis (Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology)Chironomidae - Tanytarsini
10Coccoliths, standard deviationCocco std dev±Raposeiro, Pedro MiguelChironomid analysis (Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology)
11Charcoal fluxCharcoal flux#/cm2/aRaposeiro, Pedro MiguelCharcoal analysis (Whitlock & Larsen, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments)
12Accumulation rate, coprophilous fungi sporesAcc rate coproph fung sp flux#/cm2/ade Boer, Erik JPollen analysis (Bennett & Willis, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments)
13Arboreal pollenAP%de Boer, Erik JPollen analysis (Bennett & Willis, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments)
14Pollen, shrubsPollen shrubs%de Boer, Erik JPollen analysis (Bennett & Willis, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments)
15Pollen, herbsPollen herbs%de Boer, Erik JPollen analysis (Bennett & Willis, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments)
16Carbon, organic, total/Nitrogen, total ratioTOC/TNBao, Roberto
17Carbon, organic, totalTOC%Bao, Roberto
18δ13Cδ13C‰ PDBBao, RobertoMass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS
19Nitrogen, totalTN%Bao, RobertoMass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS
20δ15Nδ15N‰ airBao, RobertoMass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1058 data points

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