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Raposeiro, Pedro Miguel; Armand Hernández, Armand; Gonçalves, Vítor; Bao, Roberto; Sáez, Alberto; Shanahan, Timothy M; Rúbio, Maria Jesus; Vázquez-Loureiro, David; Giralt, Santiago (2021): Multi-proxy analysis of sediment cores from Lake Azul (Azores archipelago, Portugal). PANGAEA, https://doi.org/10.1594/PANGAEA.933710

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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. 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.
Keyword(s):
Azores Archipelago; deep lake; multiproxy; oceanic island
Related to:
Raposeiro, Pedro Miguel; Rúbio, Maria Jesus; González, Alba; Hernández, Armand; Sánchez-López, Guiomar; Vázquez-Loureiro, David; Rull, V; Bao, Roberto; Costa, Ana Cristina; Gonçalves, Vítor; Sáez, Alberto; Giralt, Santiago (2017): Impact of the historical introduction of exotic fishes on the chironomid community of Lake Azul (Azores Islands). Palaeogeography, Palaeoclimatology, Palaeoecology, 466, 77-88, https://doi.org/10.1016/j.palaeo.2016.11.015
Vázquez-Loureiro, David; Gonçalves, Vítor; Sáez, Alberto; Hernández, Armand; Raposeiro, Pedro Miguel; Giralt, Santiago; Rubio-Inglés, María J; Rull, V; Bao, Roberto (2019): Diatom-inferred ecological responses of an oceanic lake system to volcanism and anthropogenic perturbations since 1290 CE. Palaeogeography, Palaeoclimatology, Palaeoecology, 534, 109285, https://doi.org/10.1016/j.palaeo.2019.109285
Funding:
Federal Ministry of Food and Agriculture (BMEL), grant/award no. 2813HS009: Development of a CCAMLR Marine Protected Area in the Antarctic Weddell Sea
Coverage:
Latitude: 37.872222 * Longitude: -25.773889
Date/Time Start: 2011-09-11T00:00:00 * Date/Time End: 2011-09-11T00:00:00
Minimum Elevation: 270.0 m * Maximum Elevation: 270.0 m
Event(s):
Azul11 * Latitude: 37.872222 * Longitude: -25.773889 * Date/Time: 2011-09-11T00:00:00 * Elevation: 270.0 m * Recovery: 1.33 m * Location: Lake Azul, Azores * Method/Device: Gravity corer, UWITEC (GCUWI)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1AGEAgeka BPGeocode
2AgeAgea ADGiralt, Santiago
3Aerophilous diatomsAeroph diatom%Bao, RobertoDiatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.)
4Diatoms, benthicDiatom benthic%Bao, RobertoDiatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.)
5Carbon dioxide, partial pressure, blood, standard errorpCO2 blood std e±Bao, RobertoDiatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.)
6Diatoms, plankticDiatom plank%Bao, RobertoDiatom 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
10TanypodinaeTanypodinae%Raposeiro, Pedro MiguelChironomid analysis (Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology)
11Carbon, organic, total/Nitrogen, total ratioTOC/TNGiralt, Santiago
12Carbon, organic, totalTOC%Giralt, SantiagoMass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS
13δ13Cδ13C‰ PDBGiralt, SantiagoMass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS
14Nitrogen, totalTN%Giralt, SantiagoMass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS
15δ15Nδ15N‰ airGiralt, SantiagoMass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS
16Accumulation rate, 5β-cholestan-3β-olAcc rate coprostanolng/cm2/aShanahan, Timothy MGas chromatography - Mass spectrometry (GC-MS)Coprostanol flux
17Accumulation rate, 5α-stigmastan-3β-olAcc rate stigmastanolng/cm2/aShanahan, Timothy MGas chromatography - Mass spectrometry (GC-MS)Stigmastanol flux
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1471 data points

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