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  • Data  (6)
  • 2020-2024  (6)
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Keywords
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  • 1
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    Unknown
    Radiocarbon dating of siliceous sinter deposits from El Tatio Geyser field, Chilean Altiplano (2020)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: Radiocarbon 14C Dating of hydrothermal siliceous sinter deposits from El Tatio Geyser field in the Chilean Altiplano. All samples were analyzed at the Keck-Carbon Cycle accelerator mass spectrometry laboratory (KCCAMS) at the University of California, Irvine. Radiocarbon concentrations are given as fractions of the Modern standard, D14C, and conventional radiocarbon age, following the conventions of Stuiver and Polach (Radiocarbon, v. 19, p.355, 1977). Sample preparation backgrounds have been subtracted, based on measurements of 14C-free wood. All results have been corrected for isotopic fractionation according to the conventions of Stuiver and Polach (1977), with d13C values measured on prepared graphite using the AMS spectrometer. These can differ from d13C of the original material, if fractionation occurred during sample graphitization or the AMS measurement.
    Keywords: Accelerator mass spectrometry (AMS); Age, 14C; Age, 14C calibrated, CALIB (Stuiver & Polach, 1977); Age, comment; Age, dated; Age, dated standard deviation; Calendar age; El_Tatio_ET408; El_Tatio_ET412; El_Tatio_ET414; El_Tatio_ET416; El_Tatio_ET420; El_Tatio_ET429; El_Tatio_ET432; El_Tatio_ET435; El_Tatio_ET453; El_Tatio_ET500; El_Tatio_ET501; El_Tatio_ET502; El_Tatio_ET504BM; El_Tatio_ET504DS; El_Tatio_ET504R; El_Tatio_ET506; El_Tatio_ET507; El_Tatio_ET509; El_Tatio_ET510DA; El_Tatio_ET510NV; El_Tatio_ET512; El_Tatio_ET514; El_Tatio_ET515; El_Tatio_ET517; El Tatio; El Tatio Geyser field, Altiplano, Chile; Environment; Event label; Fraction modern carbon; Fraction modern carbon, standard deviation; Laboratory code/label; radiocarbon; Sample code/label; Silica sinter; δ13C; δ13C, standard deviation; δ14C; δ14C, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 834 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    Unknown
    Multi-proxy analysis of sediment cores from Lake Caldeirão (Azores archipelago, Portugal) (2021)
    PANGAEA
    Details
    Publication Date: 2024-01-27
    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. 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
    Keywords: Accumulation rate, coprophilous fungi spores; Accumulation rate, macrophytes seeds; Accumulation rate, polycyclic aromatic hydrocarbons; Aerophilous diatoms; Age; AGE; AMS 14C dating on pollen concentrates; Clam routine on R; Arboreal pollen; Caldeirao_2017; Carbon, organic, total; Carbon, organic, 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; Diatoms, planktic; GCUWI; Gravity corer, UWITEC; Juniperus; Lake Caldeirão, Azores; Mass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS; Monostichoplana filum; Nitrogen, total; Orthocladiinae; Plant Macrofossils (Birks, 2005, in Smol et al, Tracking Environmental Change Using Lake Sediments Terrestrial, Algal, and Siliceous Indicators); Pollen, herbs; Pollen, shrubs; Pollen analysis (Bennett & Willis, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments); Tanypodinae; Tanytarsini; δ13C; δ15N
    Type: Dataset
    Format: text/tab-separated-values, 1104 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 3
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    Unknown
    Multi-proxy analysis of sediment cores from Lake Funda (Azores archipelago, Portugal) (2021)
    PANGAEA
    Details
    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. Lake Funda is situated in the southern sector of the central plateau of Flores Island at 351 m altitude and occupies the bottom of a small maar-explosion crater with 875 m in length and 625 m width, with a total area of 0.37 km2 where several water lines converge. A coring campaign was conducted in June 2017 using a 60mm diameter UWITEC gravity corer from UWITEC floating platform retrieving a core (9.97 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 Azul in the last 1300 years.,
    Keywords: Accumulation rate, 5alpha-stigmastan-3beta-ol; Accumulation rate, 5beta-cholestan-3beta-ol; Accumulation rate, coprophilous fungi spores; Accumulation rate, macrophytes seeds; 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; Chromatography; Coccoliths, standard deviation; deep lake; Diatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.); Diatoms, benthic; Diatoms, planktic; Funda_2017; GCUWI; Gravity corer, UWITEC; Lake Funda, Flores Island, Azores; 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); Tanypodinae; Tanytarsini; δ13C; δ15N
    Type: Dataset
    Format: text/tab-separated-values, 1202 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 4
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    Unknown
    Multi-proxy analysis of sediment cores from Lake Ginjal (Azores archipelago, Portugal) (2021)
    PANGAEA
    Details
    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
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 5
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    Unknown
    Multi-proxy analysis of sediment cores from Lake Azul (Azores archipelago, Portugal) (2021)
    PANGAEA
    Details
    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. 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.
    Keywords: Accumulation rate, 5alpha-stigmastan-3beta-ol; Accumulation rate, 5beta-cholestan-3beta-ol; Aerophilous diatoms; Age; AGE; Azores Archipelago; Azul11; Carbon, organic, total; Carbon, organic, total/Nitrogen, total ratio; Carbon dioxide, partial pressure, blood, standard error; Chironomid analysis (Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology); Chironomini; deep lake; Development of a CCAMLR Marine Protected Area in the Antarctic Weddell Sea; Diatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.); Diatoms, benthic; Diatoms, planktic; Gas chromatography - Mass spectrometry (GC-MS); GCUWI; Gravity corer, UWITEC; Lake Azul, Azores; Mass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS; multiproxy; Nitrogen, total; oceanic island; Orthocladiinae; Tanypodinae; Tanytarsini; WSMPA; δ13C; δ15N
    Type: Dataset
    Format: text/tab-separated-values, 1471 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 6
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    Unknown
    KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: dissolved organic carbon and total dissolved nitrogen concentrations of water samples (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: This data is part of the BMBF project CUSCO (Coastal Upwelling Systems in a Changing Ocean). Here we report the dissolved organic carbon and total dissolved nitrogen concentrations during a 35-day experiment, where we enclosed natural plankton communities in in-situ mesocosms off Peru. The experiment investigated the interactive effects of light and upwelling on the Humboldt upwelling ecosystem by mimicking a gradient of upwelling intensities (0%, 15%, 30%, 45% and 60%) under summer-time high light and winter-time low light. Integrated seawater samples from a depth between 0 and 10m were collected using a 5L Integrating Water sampler (IWS; Hydro-Bios, Kiel). Sub-samples (60 mL) were syringe filtered through two pre-combusted glass fiber filters (5 h, 450 °C). To reduce clogging, one 3.1 µm GMF filter was placed on top of a 0.7 µm GFF filter. The filtrate was acidified to pH 2 with 25% HCl before storing at -20°C until analysis. The DOC and TDN concentrations were measured using a TOC-VCPH analyser (Shimadzu). Instrument accuracy was evaluated by comparison against a deep Atlantic seawater reference (Consensus Reference Material project: D. Hansell, University of Miami, USA).
    Keywords: AQUACOSM; Carbon, organic, dissolved; Carbon, organic, dissolved, standard deviation; Coastal Upwelling System in a Changing Ocean; CUSCO; DATE/TIME; Day of experiment; Depth, water, experiment, bottom/maximum; Depth, water, experiment, top/minimum; DOC; Event label; Field experiment; Humboldt Current System; KOSMOS_2020; KOSMOS_2020_Mesocosm-M1; KOSMOS_2020_Mesocosm-M10; KOSMOS_2020_Mesocosm-M2; KOSMOS_2020_Mesocosm-M3; KOSMOS_2020_Mesocosm-M4; KOSMOS_2020_Mesocosm-M5; KOSMOS_2020_Mesocosm-M6; KOSMOS_2020_Mesocosm-M7; KOSMOS_2020_Mesocosm-M8; KOSMOS_2020_Mesocosm-M9; KOSMOS Peru; light limitation; MESO; Mesocosm experiment; Mesocosm label; mesocosm study; Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean; Nitrogen, total dissolved; Nitrogen, total dissolved, standard deviation; Shimadzu TOC-VCPH total organic carbon analyzer; TDN; Treatment; Treatment: light condition; Type of study
    Type: Dataset
    Format: text/tab-separated-values, 826 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
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