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  • 1
    facet.materialart.
    Unknown
    Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes (2019)
    PANGAEA
    In:  Supplement to: Kostrova, Svetlana S; Meyer, Hanno; Bailey, Hannah; Ludikova, Anna V; Gromig, Raphael; Kuhn, Gerhard; Shibaev, Yu A; Kozachek, A V; Ekaykin, Alexey A; Chapligin, Bernhard (2019): Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes. Boreas, 48(2), 361-376, https://doi.org/10.1111/bor.12385
    Details
    Publication Date: 2023-10-21
    Description: This article presents a new comprehensive assessment of the Holocene hydrological variability of Lake Ladoga, northwest Russia. The reconstruction is based on oxygen isotopes of lacustrine diatom silica (δ18O diatom) preserved in sediment core Co 1309, and is complemented by a diatom assemblage analysis and a survey of modern isotope hydrology. The data indicate that Lake Ladoga has existed as a freshwater reservoir since at least 10.8 cal. ka BP. The δ18O diatom values range from +29.8 to +35.0‰, and relatively higher δ18O diatom values around +34.7‰ between c. 7.1 and 5.7 cal. ka BP are considered to reflect the Holocene Thermal Maximum. A continuous depletion in δ18O diatom since c. 6.1 cal. ka BP accelerates after c. 4 cal. ka BP, indicating Middle to Late Holocene cooling that culminates during the interval 0.8-0.2 cal. ka BP, corresponding to the Little Ice Age. Lake-level rises result in lower δ18O diatom values, whereas lower lake levels cause higher δ18O diatom values. The diatom isotope record gives an indication for a rather early opening of the Neva River outflow at c. 4.4-4.0 cal. ka BP. Generally, overall high δ18O diatom values around +33.5‰ characterize a persistent evaporative lake system throughout the Holocene. As the Lake Ladoga δ18O diatom record is roughly in line with the 60°N summer insolation, a linkage to broader-scale climate change is likely.
    Keywords: Aluminium oxide; AWI_Envi; biogenic silica; Calcium oxide; Calendar age; Climate changes; Co1309; Contamination; Contamination corrected; Core; CORE; DEPTH, sediment/rock; Diatoms, δ18O; Iron oxide, FeO; Ladoga Lake, Russia; lake sediments; Magnesium oxide; Manganese oxide; Measured; palaeohydrology; Paleolimnological Transect; PLOT; Polar Terrestrial Environmental Systems @ AWI; Potassium oxide; Silicon dioxide; Sodium oxide; Stable isotopes; Sum
    Type: Dataset
    Format: text/tab-separated-values, 336 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    A global compilation of diatom silica oxygen isotope records from lake sediment: additional information on the lakes and sites corresponding to the records (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-14
    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; Argon-40/Argon-39 chronology; 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; Calendar age, maximum/old; Calendar age, minimum/young; Carbon-14, number of samples used for chronology; Carbon-14 chronology; 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; 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; Isotopes, water; 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; Lead-214; 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; 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; OUTCROP; Outcrop sample; P2; P210; P260; paleoclimate proxy; Paleomagnetics; 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; 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; Used in paper for synthesis and analysis; Varve chronology; 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
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  • 3
    facet.materialart.
    Unknown
    A global compilation of diatom silica oxygen isotope records from lake sediment: individual datasets in a single table (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-14
    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 Expected Availability
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    DATA PANGAEA
  • 4
    facet.materialart.
    Unknown
    A global compilation of diatom silica oxygen isotope records from lake sediment (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-14
    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: Compilation; delta O-18; Diatom; Lake sediment core; paleoclimate proxy
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 5
    facet.materialart.
    Unknown
    Water stable isotopic composition of lakes, streams, and surfaces waters in Pituffik, Greenland, 2018-2019 (2023)
    PANGAEA
    Details
    Publication Date: 2024-01-13
    Description: Here, we present a comprehensive isotopic survey of 535 water samples taken in 2018–2019 of the lakes, streams, and other surface waters of the periglacial Pituffik Peninsula in far northwest Greenland. The δ18O, δ2H, and deuterium-excess values of these samples represent 196 unique sites across the peninsula, and we collected the samples to improve our understanding of environmental drivers of water isotopic composition in the High Arctic. Water samples were collected by hand, sealed to prevent evaporation, and shipped to the University of Oulu, Finland, for isotopic analysis. Sampling took place from June through August 2018, in November 2018, and in July 2019. Additional hydrological and geographic data is provided for sampled lakes, including surface area, watershed area, distance from the ocean, and distance from the Greenland ice sheet.
    Keywords: 2018_001_NorthMountainRoadPool_1; 2018_002_NorthMountainRoadSnow_2; 2018_003_NorthNorthMountainStream_1; 2018_004_NorthNorthMountainSnow_2; 2018_005_LakePotato_1; 2018_006_LakePotatoSnow_2; 2018_007_LakePotatoIce_3; 2018_008_LakePotatoInflow_1; 2018_009_SouthRiverMouth_1; 2018_010_NorthRiverMouth_1; 2018_011_NorthMountainRoadPool_1; 2018_012_NorthNorthMountainStream_1; 2018_013_LakePotato_1; 2018_014_LakePotatoIceBlownToShore_3; 2018_015_LakePotatoInflow_1; 2018_016_PotatoFarmPool_1; 2018_017_PowerLake_1; 2018_018_PowerLakeIce_3; 2018_019_SnowEventAt345_4; 2018_020_NorthMountainRoadPool_1; 2018_021_NorthNorthMountainStream_1; 2018_022_PowerLake_1; 2018_023_PotatoFarmPool_1; 2018_024_LakePotato_1; 2018_025_LakePotatoInflow_1; 2018_026_FertilizerPlotLowerDrainage_1; 2018_027_FertilizerPlotLowerDrainageSnow_2; 2018_028_MidwayTutoRoadSnow_2; 2018_029_LakeTuto_1; 2018_030_LakeTutoSnow_2; 2018_031_RampCampSnow_2; 2018_032_NorthRiverMouth_1; 2018_033_NorthRiverShelter5.8_1; 2018_034_SouthRiverMouth_1; 2018_035_PytheasParkingPool_1; 2018_036_PytheasPlainPool_1; 2018_037_PytheasPlainSnow_2; 2018_038_PytheasPeakSnow_2; 2018_039_PytheasPeakDrainagePool_1; 2018_040_SouthMountainPeakPool_1; 2018_041_SouthMountainPeakSnow_2; 2018_042_PotatoFarmSnow_2; 2018_043_NorthRiverMouth_1; 2018_044_NorthRiverShelter5.8_1; 2018_045_SouthRiverMouth_1; 2018_046_IceWallPlainDrainagePool_1; 2018_047_IceWallStream_1; 2018_048_IceWallMoraineEdgeSnow_2; 2018_049_IceWallMoraineFirstCrestPool_1; 2018_050_IceWallMoraineValleyPool_1; 2018_051_IceWallMoraineValleySnow_2; 2018_052_IceWallMoraineCrestSeep_1; 2018_053_IceWallIceSheetSnow_2; 2018_054_NorthRiverMouth_1; 2018_055_PowerLake_1; 2018_056_LakePotatoInflow_1; 2018_057_OpenWaterLake_1; 2018_058_RoadsEndPond_1; 2018_059_CarexSwale_1; 2018_060_CarexPond_1; 2018_061_RavenLake_1; 2018_062_DirtyIceLake_1; 2018_063_RavenPointSnow_2; 2018_064_LakeGibraltar_1; 2018_065_TheTarn_1; 2018_066_LakeEchidna_1; 2018_067_SpagnumCoveDrain_1; 2018_068_LakeBracket_1; 2018_069_LandglacierViewLake_1; 2018_070_IceCaveHikeSlopeDrain_1; 2018_071_IceCaveHikeStream_1; 2018_072_IceCaveHikeMidpointSnow_2; 2018_073_IceCaveHikeFogPlainPolarDesertSnow_2; 2018_074_IceCaveInCaveStream_1; 2018_075_IceCaveDripwater_1; 2018_076_IceCaveFrostCrystals_2; 2018_077_SearchPartyValleyStream_1; 2018_078_NorthMountainViewLake_1; 2018_079_DiabaseDepthLake_1; 2018_080_DiabaseDepthLakeInflow_1; 2018_081_ShaleyPointLake_1; 2018_082_LionessRockLake_1; 2018_083_SaundersIslandViewLake_1; 2018_084_SecretPlaceSeep_1; 2018_085_SecretPlaceSnow_2; 2018_086_BLaunchPool_1; 2018_087_LakePotato_1; 2018_088_UpperLakePotato_1; 2018_089_NorthRiverMouth_1; 2018_090_SouthRiverMouth_1; 2018_091_PrecipitationRainEvent1_4; 2018_092_PrecipitationRainEvent2_4; 2018_093_LakeCrescent_1; 2018_094_GravelPileLake_1; 2018_095_BMEWSBowlPond_1; 2018_096_GravelStreamOfPotatoCreek_1; 2018_097_WaterLake_1; 2018_098_PerchedLake_1; 2018_099_AngryDuckLake_1; 2018_100_WaterGardenLake_1; 2018_101_PacmanPlainPool_05.07.18; 2018_102_PacmanLake_1; 2018_103_CoastalPlateauPool_1; 2018_104_TheWaterfall_1; 2018_106_LakeUno_06.07.18; 2018_107_LakeDos_06.07.18; 2018_108_LakeTres_1; 2018_109_LakeQuattro_1; 2018_110_QuattroMorainePools_1; 2018_111_LoonPond_1; 2018_112_MossyBottomPond_06.07.18; 2018_113_LakeAqua_1; 2018_114_LakeAquaSnow_2; 2018_115_LonesomeCabinLake_1; 2018_116_FakePumiceLake_1; 2018_117_PartyHouseLake_1; 2018_118_BMEWSBacksideLake_1; 2018_119_BlackshoreLake_1; 2018_120_LakeNephros_1; 2018_121_SereneLake_1; 2018_122_SittingRockLake_1; 2018_123_NoisyGooseLake_1; 2018_124_FoxCanyonBridgeNorthFork_1; 2018_125_FoxCanyonBridgeSouthFork_1; 2018_126_FoxCanyonBridgeJointFlow_07.07.18; 2018_127_PMountainPlainPool_07.07.18; 2018_128_PMountainPeakPool_1; 2018_129_PMountainPeakSnow_07.07.18; 2018_130_PMountainFrost_07.07.18; 2018_131_IceRampBaseMeltPool_1; 2018_132_IceRampBaseSnowbank_07.07.18; 2018_133_IceRampProglacialLake_1; 2018_134_NorthRiverMouth_1; 2018_135_NorthRiverSouthForkShelter2_1; 2018_136_NorthRiverShelter5.8_08.07.18; 2018_137_SouthRiverMouth_1; 2018_138_PrecipitationEvent_4; 2018_139_PrecipitationEvent_10.07.18; 2018_140_NorthRiverMouth_1; 2018_141_NorthRiverSouthForkShelter2_1; 2018_142_NorthRiverShelter5.8_11.07.18; 2018_143_SouthRiverMouth_1; 2018_144_FoxCanyonNorthFork_1; 2018_145_FoxCanyonSouthFork_1; 2018_146_TankFarmLake_1; 2018_147_NorthMountainAccessPond_1; 2018_148_DLaunchLake_1; 2018_149_RockyValeLake_1; 2018_150_RockyValeSnow_2; 2018_151_PrecipitationEvent_4; 2018_152_PotatoLake_1; 2018_153_PowerLake_1; 2018_154_CableAccessLake_1; 2018_155_TheTarn_1; 2018_156_LakeLeslie_1; 2018_157_LushPool_13.07.18; 2018_158_PavementPlainPool_1; 2018_159_LakeviewPlainSeep_1; 2018_160_RavenRidgePond_1; 2018_161_RavenRidgeRiftPool_1; 2018_162_PrecipitationEvent_15.07.18; 2018_163_PrecipitationEvent_4; 2018_164_HalfSnowLake_16.07.18; 2018_165_VividValeCreek_1; 2018_166_BlackMossWash_1; 2018_167_BoulderPlainPools_1; 2018_168_AnkleSaverWashPool_1; 2018_169_FantailLake_1; 2018_170_FantailLakeSnow_2; 2018_171_UnexpectedLake_16.07.18; 2018_172_RockRingLake_1; 2018_173_RockRingLakeSnow_2; 2018_174_RockRingLakeInflowStream_1; 2018_175_RockRingMoraineIceSheetRunoff_1; 2018_176_RockRingMoraineRecentSnow_2; 2018_177_RockRingMoraineOldSnowRamp_2; 2018_178_IceCliffOutwashStream_1; 2018_179_IceCliffWaterfall_1; 2018_180_IceCliffBaseIce_3; 2018_181_IceCliffCleanIceLayer_3; 2018_182_IceCliffDirtyIceLayer_3; 2018_185_DundasIceberg_3; 2018_186_DundasPond_1; 2018_187_LakePotato_1; 2018_188_PowerLake_1; 2018_189_ParisPond_1; 2018_190_Champsd'ElyseeSeepPool_1; 2018_191_SecretPlaceWestPool_25.07.18; 2018_192_LakePotato_1; 2018_193_PowerLake_30.07.18; 2018_194_NoCaveBeachSeep_26.07.18; 2018_195_LakeTuto_03.08.18; 2018_196_OldMineRiver_1; 2018_197_WaterfallStream_03.08.18; 2018_198_NorthRiverMouth_1; 2018_199_SouthRiverMouth_1; 2018_200_DLaunchLake_07.08.18; 2018_201_BackBeachSouthCreek_1; 2018_202_BackBeachNorthCreek_1; 2018_203_BackBeachSouthCliffSeep_1; 2018_204_BackBeachSmallSnowIcePack_2; 2018_206_LakePotato_1; 2018_207_PowerLake_1; 2018_208_NorthRiverSouthForkShelter2_1; 2018_209_NorthRiverShelter5.8_1; 2018_210_IceWallRoadSeep_1; 2018_211_IceWallStream_1; 2018_212_IceWallIceSheetOutflow_1; 2018_213_IceWallOverTheTopFlow_10.08.18; 2018_214_PrecipitationEvent_4; 2018_215_PrecipitationEvent_4; 2018_216_PrecipitationEvent_12.08.18; 2018_217_NorthRiverMouth_1; 2018_218_NorthRiverSouthForkShelter2_1; 2018_219_NorthRiverShelter5.8_15.08.18; 2018_220_FoxCanyonNorthFork_1; 2018_221_FoxCanyonSouthFork_1; 2018_222_GarnetSlopePool_15.08.18; 2018_223_GarnetCreek_1; 2018_224_GarnetMountainSnowFieldRemnant_2; 2018_225_SouthRiverMouth_1; 2018_226_IceCliffIceSheetOutflow_1; 2018_227_IceCliffWaterfallStream_1; 2018_228_SnowbankWash_1; 2018_229_TheViewPool_lost; 2018_230_TheViewSnow_2; 2018_231_NorthRiverMouth_1; 2018_232_NorthRiverSouthForkShelter2_1; 2018_233_NorthRiverShelter5.8_lost; 2018_234_SouthRiverMouth_lost; 2018_235_FoxCanyonNorthFork_1; 2018_236_FoxCanyonSouthFork_1; 2018_237_PMountainFreshSnow_2; 2018_238_RadioMountainFreshSnow_2; 2018_239_PrecipitationEvent_lost; 2018_240_IleDeLaCiteSnowField_2; 2018_241_PeregrineCliffSnow_2; 2018_242_NorthRiverMouth_1; 2018_243_NorthRiverSouthForkShelter2_1; 2018_244_NorthRiverShelter5.8_1; 2018_245_SouthRiverMouth_1; 2018_246_FoxCanyonNorthFork_1; 2018_247_FoxCanyonSouthFork_1; 2018_248_PrecipitationEvent_4; 2018_249_FertilizerRidgeFlow_1; 2018_250_PMountainWeekOldSnow_lost; 2018_251_PrecipitationEvent_4; 2018_252_NorthRiverMouth_1; 2018_253_NorthRiverSouthForkShelter2_1; 2018_254_NorthRiverShelter5.8_1; 2018_255_FoxCanyonNorthFork_1; 2018_256_FoxCanyonSouthFork_1; 2018_257_SouthRiverMouth_1; 2018_258_AngryDuckLake_1; 2018_259_PerchedLake_1; 2018_260_LakeQuattro_1; 2018_261_LakePotato_1; 2018_262_LakeCrescent_1; 2018_263_PytheasPlainPool_1; 2018_264_SereneLake_1; 2018_265_NorthMountainViewLake_1; 2018_266_LostboySwale_1; 2018_267_PowerLake_1; 2018_268_SouthRiverMouth_1;
    Type: Dataset
    Format: text/tab-separated-values, 6014 data points
    Location Call Number Expected Availability
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  • 6
    facet.materialart.
    Unknown
    Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes (2019)
    WILEY-BLACKWELL PUBLISHING
    In:  EPIC3Boreas, WILEY-BLACKWELL PUBLISHING, pp. 1-16, ISSN: 0300-9483
    Details
    Publication Date: 2019-05-19
    Description: This article presents a new comprehensive assessment of the Holocene hydrological variability of Lake Ladoga, northwest Russia. The reconstruction is based on oxygen isotopes of lacustrine diatom silica (δ18Odiatom) preserved in sediment core Co 1309, and is complemented by a diatom assemblage analysis and a survey of modern isotope hydrology. The data indicate that Lake Ladoga has existed as a freshwater reservoir since at least 10.8 cal. ka BP. The δ18Odiatom values range from +29.8 to +35.0‰, and relatively higher δ18Odiatom values around +34.7‰ between c. 7.1 and 5.7 cal. ka BP are considered to reflect the Holocene Thermal Maximum. A continuous depletion in δ18Odiatom since c. 6.1 cal. ka BP accelerates after c. 4 cal. ka BP, indicating Middle to Late Holocene cooling that culminates during the interval 0.8–0.2 cal. ka BP, corresponding to the Little Ice Age. Lake‐level rises result in lower δ18Odiatom values, whereas lower lake levels cause higher δ18Odiatom values. The diatom isotope record gives an indication for a rather early opening of the Neva River outflow at c. 4.4–4.0 cal. ka BP. Generally, overall high δ18Odiatom values around +33.5‰ characterize a persistent evaporative lake system throughout the Holocene. As the Lake Ladoga δ18Odiatom record is roughly in line with the 60°N summer insolation, a linkage to broader‐scale climate change is likely.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
    Location Call Number Expected Availability
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    PAPER (OA)
  • 7
    facet.materialart.
    Unknown
    Holocene atmospheric circulation in the central North Pacific: a new terrestrial diatom and δ18O dataset from the Aleutian Islands (2018)
    PERGAMON-ELSEVIER SCIENCE LTD
    In:  EPIC3Quaternary Science Reviews, PERGAMON-ELSEVIER SCIENCE LTD, (194), pp. 27-38, ISSN: 0277-3791
    Details
    Publication Date: 2018-09-11
    Description: The North Pacific is a zone of cyclogenesis that modulates synoptic-scale atmospheric circulation, yet there is a paucity of instrumental and paleoclimate data to fully constrain its long-term state and variability. We present the first Holocene oxygen isotope record (d18Odiatom) from the Aleutian Islands, using siliceous diatoms preserved in Heart Lake on Adak Island (51.85° N, 176.69° W). This study builds on previous work demonstrating that Heart Lake sedimentary d18Odiatom values record the d18O signal of precipitation, and correlate significantly with atmospheric circulation indices over the past century. We apply this empirical relationship to interpret a new 9.6 ka d18Odiatom record from the same lake, supported by diatom assemblage analysis. Our results demonstrate distinct shifts in the prevailing trajectory of storm systems that drove spatially heterogeneous patterns of moisture delivery and climate across the region. During the early-mid Holocene, a warmer/wetter climate prevailed due to a predominantly westerly Aleutian Low that enhanced advection of warm 18O-enriched Pacific moisture to Adak, and culminated in a d18Odiatom maxima (33.3‰) at 7.6 ka during the Holocene Thermal Maximum. After 4.5 ka, relatively lower d18Odiatom indicates cooler/drier conditions associated with enhanced northerly circulation that persisted into the 21st century. Our analysis is consistent with surface climate conditions inferred from a suite of terrestrial and marine climate-proxy records. This new Holocene dataset bridges the gap in an expanding regional network of paleoisotope studies, and provides a fresh assessment of the complex spatial patterns of Holocene climate across Beringia and the atmospheric forces driving them.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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    Postglacial environmental succession of Nettilling Lake (Baffin Island, Canadian Arctic) - Paleo-salinity changes inferred from diatom isotopes (d18Odiatom) (2016)
    In:  EPIC3Fourth 'PAST Gateways' International Conference, Trondheim, Norway, 2016-05-23-2016-05-27
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    Publication Date: 2016-08-14
    Description: The need for better understanding of long-term climate and environmental variability in the Foxe Basin (Nunavut, Canada) is highlighted by the major environmental changes in this highly sensitive region, which occupies a transitional position between areas undergoing drastic and more subtle changes in the High and Low Canadian Arctic over the course of the last millennium, respectively. However, high-resolution long-term climate records remain scarce in the Foxe Basin region even though it is of key importance to understanding Holocene climate evolution since the last deglaciation. In order to reconstruct the regional postglacial climatic and environmental variability, we adopted a multi-proxy paleolimnological approach analysing sedimentary records retrieved from Nettilling Lake on southern Baffin Island, involving elemental geochemistry from high-resolution µ-XRF analyses, diatom assemblage composition and oxygen isotope records from fossil diatom silica (δ18Odiatom). The oxygen isotope composition of diatoms (δ18Odiatom) yields extremely large δ18Odiatom variations in the core of more than 13‰ which are mainly driven by changes in the isotopic composition of the lake water due to a shift from glacio-marine to brackish (at ca. 7400 yr cal BP) towards lacustrine conditions (at ca. 6000 yr cal BP) associated with decreasing salinity also documented by shifts in the composition of diatom assemblages. Our study provides evidence that paleo-salinity can be inferred from δ18Odiatom. Additionally, in the lacustrine section of the core,, δ18Odiatom may also serve as a proxy for past air temperatures recording a late Holocene cooling of about 4°C for the greater Baffin region. Furthermore, the results obtained from our study provide new insights into the timing of regional glacier retreat (ca. 8300 cal BP) and the duration of the postglacial marine invasion (from ca. 7400 cal BP to ca. 6000 cal. BP), thereby complementing ongoing research of postglacial environmental dynamics in the Foxe Basin and on south-western Baffin Island.
    Repository Name: EPIC Alfred Wegener Institut
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    Holocene hydrological variability of Lake Ladoga as inferred from diatom oxygen isotopes. (2018)
    In:  EPIC3PLOT/CHASE Project Meeting, Rosendal, Norway, 2018-05-29-2018-05-31
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    Publication Date: 2018-11-22
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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    Holocene hydrological variability of Lake Ladoga, NW Russia as inferred by diatom oxygen isotopes (2018)
    In:  EPIC3IPA-IAL 2018 I Joint Meeting Unravelling the Past and Future of Lakes, Stockholm, 2018-06-18-2018-06-21
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    Publication Date: 2018-11-22
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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