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  • 2020-2024  (17)
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  • 1
    Publication Date: 2023-11-30
    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 Limitation Availability
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  • 2
    Publication Date: 2024-02-23
    Description: To evaluate changes in terrestrial and aquatic ecosystems in the Azores, we developed paleoecological and paleoclimate records from Lake Funda on Flores Island that span the last millennium. Vegetation composition (n-alkane average chain length) indicate when human activities began in the catchment area and biogenic silica tracks changes in diatom productivity. In addition, sterol hydrogenation and archaeal lipids (isoprenoid glycerol dialkyl glycerol tetraethers) trace changes in redox conditions and biogeochemical cycles, respectively. Finally, a high-resolution reconstruction using leaf wax hydrogen isotopes records changes in precipitation amount over the last millennium.
    Keywords: Acyclic glycerol dialkyl glycerol tetraether, fractional abundance; Age; AGE; Agilent 6890N gas chromatography (GC) system and a flame ionization detector (FID); Agilent 7890B gas chromatography (GC) with an Agilent 5977B quadrupole mass spectrometer (MS); AMS 14C dating on pollen concentrates; Clam routine on R; Atmospheric Pressure Chemical Ionization/High Performance Liquid Chromatography-Mass Spectrometer (APCI/HPLC-MS); Auto Analyzer Technicon AAII; beta-Sitosterol, flux; biogenic silica; C16-Fatty acid methyl esters, fractional abundance; C18-Fatty acid methyl esters, fractional abundance; C20-Fatty acid methyl esters, fractional abundance; C22-Fatty acid methyl esters, fractional abundance; C22-fatty acid methyl esters, δD; C22-fatty acid methyl esters, δD, standard deviation; C24-Fatty acid methyl esters, fractional abundance; C26-Fatty acid methyl esters, fractional abundance; C28-Fatty acid methyl esters, fractional abundance; C28-fatty acid methyl esters, δD; C28-fatty acid methyl esters, δD, standard deviation; C30-Fatty acid methyl esters, fractional abundance; C30-fatty acid methyl esters, δD; C30-fatty acid methyl esters, δD, standard deviation; C32-Fatty acid methyl esters, fractional abundance; Campestanol, flux; Campesterol, flux; Cholestanol, flux; Cholesterol, flux; Comment; Crenarchaeol, fractional abundance; Crenarchaeol isomer, fractional abundance; DEPTH, sediment/rock; Dicyclic glycerol dialkyl glycerol tetraether, fractional abundance; Epi-coprostanol flux; Funda_2017; Gas Chromatograph (GC), Manufacturer unknown, custom built; coupled with Isotope Ratio Mass Spectrometer (IRMS), Thermo Scientific, Delta V Plus; GCUWI; GDGTs; Gravity corer, UWITEC; hydrogen isotope; Lake Funda, Flores Island, Azores; lake sediment proxies; leaf waxes; Monocyclic glycerol dialkyl glycerol tetraether, fractional abundance; n-Alkane C21, fractional abundance; n-Alkane C23, fractional abundance; n-Alkane C25, fractional abundance; n-Alkane C27, fractional abundance; n-Alkane C29, fractional abundance; n-Alkane C31, fractional abundance; n-Alkane C33, fractional abundance; Silicon; Silicon dioxide; sterols; Stigmastanol, flux; Stigmasterol, flux; Tricyclic glycerol dialkyl glycerol tetraether, fractional abundance
    Type: Dataset
    Format: text/tab-separated-values, 2362 data points
    Location Call Number Limitation Availability
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  • 3
    Publication Date: 2024-01-13
    Description: We present a quantitative NAO reconstruction for the central Iberian Peninsula (IP) over the last two millennia, along with its uncertainties, by applying a Bayesian approach.
    Keywords: Age; AGE; Bayesian Modeling; CIM12-04A; Common Era; Iberian Central Range, Spain; lake sediments; Modes of Variability; NAO; North Atlantic Oscillation index; Uncertainty
    Type: Dataset
    Format: text/tab-separated-values, 1302 data points
    Location Call Number Limitation Availability
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  • 4
    Publication Date: 2024-01-13
    Keywords: After Bray & Curtis (1957); AGE; age depth model; chironomid-inferred temperature reconstructions; Dust provenance; GCUWI; Gravity corer, UWITEC; Halogens; Lake core; PEX19-01; Principal coordinates analysis
    Type: Dataset
    Format: text/tab-separated-values, 129 data points
    Location Call Number Limitation Availability
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  • 5
    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 Limitation Availability
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  • 6
    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 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 Limitation Availability
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  • 7
    Publication Date: 2024-04-05
    Description: Serra da Estrela is a Portuguese mountain range of the western and moister sector of the Iberian Central Range that has the highest point in mainland Portugal, with an elevation of 1993 m above sea level (asl). This is a key region to explore the Last Glacial termination in the Atlantic region of Iberia and reconstruct past environmental and climatic conditions. One of the very few pro-glacial lakes in Serra da Estrela is Lake Peixão (drilling place 40.343044; -7.605371; 1677 m asl). The lake has an area of 0.02 km2, with a maximum water depth of ca. 5 m. Lake Peixão is oligotrophic, slightly acidic, and monomictic. In June 2019 (2019-06-10T00:00:00; 2019-06-14T00:00:00), during the campaign “Serra da Estrela Coring” (PEX19), the long core (PEX19-01; 8.63-m-long) was recovered at ca. 4 m depth, using a UWITEC© piston coring system from a floating platform, and the short one (PEX15-01C; 1.23 m long), using a UWITEC gravity coring system. The Bayesian age-depth model data was developed using the Bacon v. 2.3 5.7 software for R (Blaauw and Christen et al., 2018), and applied the most updated Intcal20 curve for calibration of the radiocarbon dates (Reimer et al., 2020). The age-depth model included 16 AMS 14C dates and 210Pb-137CS measurements, covering the last 14.7±0.32 cal. Ka BP. In November 2020, Total Organic Carbon (TOC) was obtained using a DeltaV Advantage mass spectrometer, a Conflo IV interphase, and a Flash IRMS EA IsoLink CNS elemental analyser (Thermo Scientific). In March 2022, halogens (Br and Cl), Fe, Ca, Ti, and Nb were obtained by using a non-destructive AVAATECH X-ray fluorescence (XRF) Core Scanner. Chironomid analysis was based on Brooks et al. (2007) and Principal Coordinates Analysis (PCO) was performed on a resemblance matrix of Bray-Curtis distances (Anderson et al., 2008). The dataset presents the age-depth modelled data and the 95% confidence interval limits, the Br/TOC and Cl/TOC ratios (used as oceanic influx proxies), the Fe/Ca, Ti/Ca, and Nb/Ca ratios (used as dust proxies), and the chironomids Principal Coordinates Analysis (PCO2) temperature related.
    Keywords: age depth model; chironomid-inferred temperature reconstructions; Dust provenance; Halogens; Lake core
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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  • 8
    Publication Date: 2024-04-11
    Keywords: AGE; age depth model; Bromine/total organic carbon ratio; chironomid-inferred temperature reconstructions; Chlorine/Carbon, organic, total, ratio; Dust provenance; GCUWI; Gravity corer, UWITEC; Halogens; Iron/Calcium ratio; Lake core; Niobium/Calcium ratio; PEX19-01; Titanium/Calcium ratio; X-ray fluorescence core scanner (XRF), Avaatech
    Type: Dataset
    Format: text/tab-separated-values, 850 data points
    Location Call Number Limitation Availability
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  • 9
    Publication Date: 2024-04-26
    Description: Oxygen isotopes in biogenic silica (δ18O BSi) from lake sediments allow for quantitative reconstruction of past hydroclimate and proxy–model comparison in terrestrial environments. The signals of individual records have been attributed to different factors, such as air temperature (T air ), atmospheric circulation patterns, hydrological changes and lake evaporation. Here, we provide 55 composite down–core records published to date and complemented with additional lake basin parameters (e.g. lake water residence time and catchment size) to best characterize the signal properties. Records feature widely different temporal coverage and resolution ranging from decadal–scale records covering the last 150 years to records with multi–millennial scale resolution spanning glacial–interglacial cycles. Best coverage in number of records (N=37) and datapoints (N=2112) is available for northern hemispheric (NH) extra–tropic regions throughout the Holocene (corresponding to Marine Isotope Stage 1; MIS 1).
    Keywords: 03-2K, 05-4P; Age, interval; Alps; Americium-241 (yes/no); Argon-40/Argon-39 chronology (yes/no); AWI Arctic Land Expedition; BAIK13; Baikal; BALGGU171; Baringo-Bogoria Basin; Baunt Lake; BD_4; BDP1996; BDP96-2; BNT14_1-8; BUCKET; Bucket water sampling; Caesium-137 (yes/no); Calendar age, maximum/old; Calendar age, minimum/young; Carbon-14, number of samples used for chronology; Carbon-14 chronology (yes/no); Catchment area; Chronology; Co1309; Co1321; Co1412; Comment; COMPCORE; Compilation; Composite Core; CON01-6; CON01-603-2; CON01-605-3; Continent; Core; CORE; Core III; Core length; Country; D110; D160; Dating; delta O-18; Depth, description; Depth, sampling; Dethlingen; Diatom; Diatoms, δ18O (yes/no); Discharge, average per year; DRILL; Drilling/drill rig; EC1; ELEVATION; Elgygytgyn2003; Elgygytgyn crater lake, Sibiria, Russia; Event label; EWK; From the HydroLakes database; From the original publication; G7/02; Garba Guracha; GC; Gear; GL1; Grandfather Lake; Gravity corer; Hausberg Tarn; Heart Lake; HL-1; HT1; Identification; Isotope notation; Isotopes, precipitation (yes/no); Isotopes, water (yes/no); Kamchatka2007; KL_Mg; KOL; KTK2; KULC; KULLENBERG corer; L850; Ladoga Lake, Russia; Lago Chungara; Laguna Verda Baja; Laguna Verde Alta; Laguna Zacapu; Lake; Lake, depth, maximum; Lake, depth, mean; Lake 850; Lake Baikal, Russia; Lake Baikal/Academician Ridge; Lake Bolshoye Shchuchye, Polar Urals, Russia; Lake Brazi; Lake Challa; Lake Chuna; Lake Emanda; Lake Gosciaz; Lake Kotokel; Lake Malawi; Lake Petit; Lake Pinarbasi; Lake Pupuke; Lake Rutundu; Lake sediment core; Lake Spaime; Lake Stuor Goussasjavri; Lake surface area; Lake Tilo; Lake type; Lake water volume; LATITUDE; LB03-01; LB04-02; LC-1; LCHA-1; Lead-210 (yes/no); Lead-214 (yes/no); Les Echets; LG-1; Linsley Pond; Livingstone piston corer; Location type; LONGITUDE; LP1; LPC; LR-1; LS-1; LSG-1; LT1; LVA-1; LVB-1; Lz1024; Lz1029; M98-2P; MACC; Mackereth corer; Magnetic susceptibility (yes/no); Makgadikgadi; MBG-1; MC-2; Mica Lake; NAR0110; Nar Golu; Nettilling Lake; Ni-2B; northeastern Siberia; Number of points; NW-Spain; Optically stimulated luminescence chronology (yes/no); OUTCROP; Outcrop sample; P2; P210; P260; paleoclimate proxy; Paleomagnetics (yes/no); PCOR; PCUWI; Percussion corer; Persistent Identifier; PET09P2; PG1857-2; Piston corer, UWITEC; Piston corer (Kiel type); Piston corer Meischner large; PN94C; Profile; PTAU1; Radium-226 (yes/no); Reference/source; Residence time; RM1; RU-Land_2003_Elgygytgyn; RU-Land_2007_Kamchatka; RUSC; Russian corer; Sampling/drilling in lake; Schrader Pond; SCP16-2A; SEDCO; Sediment corer; SHT1; SIL-MC; Simba Tarn; Small Hall Tarn; SQRL; Square-rod Livingston piston sampler; ST1; Sunken Island Lake; Tauca; TDB-1; Tephra/volcanic ash; Time resolution; TL1; Tonsberg Lake; Two-Yurts Lake; Type; Uranium-thorium chronology (yes/no); Used in paper for synthesis and analysis; Varve chronology (yes/no); VAY1; Vereshchagin; Vuolep Allakasjaure; Year of publication; Year of sampling; Yellowstone Lake; YL16-2C; ZAC/3; ZK2
    Type: Dataset
    Format: text/tab-separated-values, 2978 data points
    Location Call Number Limitation Availability
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  • 10
    Publication Date: 2024-04-25
    Description: Oxygen isotopes in biogenic silica (δ18O BSi) from lake sediments allow for quantitative reconstruction of past hydroclimate and proxy–model comparison in terrestrial environments. The signals of individual records have been attributed to different factors, such as air temperature (T air ), atmospheric circulation patterns, hydrological changes and lake evaporation. Here, we provide 55 composite down–core records published to date and complemented with additional lake basin parameters (e.g. lake water residence time and catchment size) to best characterize the signal properties. Records feature widely different temporal coverage and resolution ranging from decadal–scale records covering the last 150 years to records with multi–millennial scale resolution spanning glacial–interglacial cycles. Best coverage in number of records (N=37) and datapoints (N=2112) is available for northern hemispheric (NH) extra–tropic regions throughout the Holocene (corresponding to Marine Isotope Stage 1; MIS 1).
    Keywords: 03-2K, 05-4P; AGE; Alps; Aluminium oxide; AWI Arctic Land Expedition; BAIK13; Baikal; BALGGU171; Baringo-Bogoria Basin; Baunt Lake; BD_4; BDP1996; BDP96-2; BNT14_1-8; BUCKET; Bucket water sampling; Co1309; Co1321; Co1412; COMPCORE; Compilation; Composite Core; CON01-6; CON01-603-2; CON01-605-3; Core; CORE; Core III; Corrected for contamination; D110; D160; delta O-18; Depth, composite bottom; Depth, composite mean; Depth, composite top; Depth, relative; Dethlingen; Diatom; Diatoms, δ18O; Diatoms, δ18O, standard deviation; DRILL; Drilling/drill rig; EC1; Elgygytgyn2003; Elgygytgyn crater lake, Sibiria, Russia; Event label; EWK; G7/02; Garba Guracha; GC; GL1; Grandfather Lake; Gravity corer; Hausberg Tarn; Heart Lake; HL-1; HT1; Identification; Kamchatka2007; KL_Mg; KOL; KTK2; KULC; KULLENBERG corer; L850; Laboratory code/label; Ladoga Lake, Russia; Lago Chungara; Laguna Verda Baja; Laguna Verde Alta; Laguna Zacapu; Lake 850; Lake Baikal, Russia; Lake Baikal/Academician Ridge; Lake Bolshoye Shchuchye, Polar Urals, Russia; Lake Brazi; Lake Challa; Lake Chuna; Lake Emanda; Lake Gosciaz; Lake Kotokel; Lake Malawi; Lake Petit; Lake Pinarbasi; Lake Pupuke; Lake Rutundu; Lake sediment core; Lake Spaime; Lake Stuor Goussasjavri; LB03-01; LB04-02; LC-1; LCHA-1; Les Echets; LG-1; Linsley Pond; Livingstone piston corer; LP1; LPC; LR-1; LS-1; LSG-1; LVA-1; LVB-1; Lz1024; Lz1029; M98-2P; MACC; Mackereth corer; Makgadikgadi; MBG-1; MC-2; Mica Lake; NAR0110; Nar Golu; Nettilling Lake; Ni-2B; northeastern Siberia; NW-Spain; OUTCROP; Outcrop sample; P2; P210; P260; paleoclimate proxy; PCOR; PCUWI; Percussion corer; PET09P2; PG1857-2; Piston corer, UWITEC; Piston corer (Kiel type); Piston corer Meischner large; PN94C; PTAU1; Raw data; RM1; RU-Land_2003_Elgygytgyn; RU-Land_2007_Kamchatka; RUSC; Russian corer; Sample code/label; Sampling/drilling in lake; Schrader Pond; SCP16-2A; Section; SEDCO; Sediment corer; SHT1; Silicon dioxide; SIL-MC; Simba Tarn; Small Hall Tarn; SQRL; Square-rod Livingston piston sampler; ST1; Sunken Island Lake; Tauca; TDB-1; TL1; Tonsberg Lake; Two-Yurts Lake; VAY1; Vereshchagin; Vuolep Allakasjaure; Yellowstone Lake; YL16-2C; ZAC/3; ZK2; δ13C, diatom-bound organic matter
    Type: Dataset
    Format: text/tab-separated-values, 19805 data points
    Location Call Number Limitation Availability
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