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  • 1
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    Pollen spectra and relative pollen productivity estimates for common taxa of the northern Siberian Arctic (2015)
    PANGAEA
    In:  Supplement to: Niemeyer, Bastian; Klemm, Juliane; Pestryakova, Luidmila A; Herzschuh, Ulrike (2015): Relative pollen productivity estimates for common taxa of the northern Siberian Arctic. Review of Palaeobotany and Palynology, 221, 71-82, https://doi.org/10.1016/j.revpalbo.2015.06.008
    Details
    Publication Date: 2023-03-07
    Description: Pollen productivity estimates (PPE) are used to quantitatively reconstruct variations in vegetation within a specific distance of the sampled pollen archive. Here, for the first time, PPEs from Siberia are presented. The study area (Khatanga region, Krasnoyarsk territory, Russia) is located in the Siberian Sub-arctic where Larixis the sole forest-line forming tree taxon. Pollen spectra from two different sedimentary environments, namely terrestrial mosses (n=16) and lakes (n=15, median radius ~100 m) and their surrounding vegetation were investigated to extract PPEs. Our results indicate some differences in pollen spectra between moss and lake pollen. Larix and Cyperaceae for example obtained higher representation in the lacustrine than in terrestrial moss samples. This highlights that in calibration studies modern and fossil dataset should be of similar sedimentary origin. The results of the Extended R-Value model were applied to assess the relevant source area of pollen (RSAP) and to calculate the PPEs for both datasets. As expected, the RSAP of the moss samples was very small (about 10 m) compared to the lacustrine samples (about 25 km). Calculation of PPEs for the six most common taxa yielded generally similar results for both datasets. Relative to Poaceae (reference taxon, PPE=1) Betula nana-type (PPEmoss: 1.8, PPElake: 1.8) and Alnusfruticosa-type (PPEmoss: 6.4, PPElake: 2.9) were overrepresented while Cyperaceae (PPEmoss: 0.5, PPElake: 0.1), Ericaceae (PPEmoss: 0.3, PPElake 〈0.01), Salix (PPEmoss: 0.03, PPElake 〈0.01) and Larix (PPEmoss 〈0.01, PPElake: 0.2) were under-represented in the pollen spectra compared to the vegetation in the RSAP. The estimation for the dominant tree in the region, Larixgmelinii, is the first published result for this species, but need to be considered very preliminary. The inferred sequence from over- to under-representation is mostly consistent with results from Europe; however, still the absolute values show some differences. Gathering vegetation data was limited by flowering season and low resolute satellite imagery and accessibility of the remote location of our study area. Therefore, our estimate may serve as first reference to strengthen future vegetation reconstructions in this climate-sensitive region.
    Keywords: AWI_PerDyn; Permafrost Research (Periglacial Dynamics) @ AWI
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Pollen productivity estimates from two different sedimentary environments in the Khatanga region, Russia (2015)
    PANGAEA
    Details
    Publication Date: 2023-03-07
    Keywords: 11-CH-moss10I; 11-CH-moss16I; 11-CH-moss17I; 11-CH-moss17II; 11-CH-moss2I; 11-CH-moss2II; 11-CH-moss6I; 11-CH-moss6II; 11-CH-moss6III; 11-CH-moss6IV; 13-TY-moss4K1; 13-TY-moss4K2; 13-TY-moss7K1; 13-TY-moss7K2; 13-TY-moss9K1; 13-TY-moss9K2; AWI_PerDyn; AWI Arctic Land Expedition; Calculated; Chatanga2011; Counting, palynology; Event label; Khatanga region, Russia; LAKE; LAND; Latitude of event; Longitude of event; Permafrost Research (Periglacial Dynamics) @ AWI; Pollen productivity estimate; Ring sector, in; Ring sector, out; RU-Land_2011_Khatanga; Sample ID; Sampling/measurement on land; Sampling lake
    Type: Dataset
    Format: text/tab-separated-values, 2410 data points
    Location Call Number Limitation Availability
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  • 3
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    Profiles of diatoms, pollen, XRD, XRF and organic composition of two sediment cores (PG2022 and PG2023) from Lake Kyutyunda in Yakutia, NE Siberia, Russia
    PANGAEA
    In:  Supplement to: Biskaborn, Boris K; Subetto, Dmitry A; Savelieva, Larissa A; Vakhrameeva, Polina; Hansche, Andreas; Herzschuh, Ulrike; Klemm, Juliane; Heinecke, Liv; Pestryakova, Luidmila A; Meyer, Hanno; Kuhn, Gerhard; Diekmann, Bernhard (2016): Late Quaternary vegetation and lake system dynamics in north-eastern Siberia: Implications for seasonal climate variability. Quaternary Science Reviews, 147, 406-421, https://doi.org/10.1016/j.quascirev.2015.08.014
    Details
    Publication Date: 2023-05-12
    Description: Although the climate development over the Holocene in the Northern Hemisphere is well known, palaeolimnological climate reconstructions reveal spatiotemporal variability in northern Eurasia. Here we present a multi-proxy study from north-eastern Siberia combining sediment geochemistry, and diatom and pollen data from lake-sediment cores covering the last 38,000 cal. years. Our results show major changes in pyrite content and fragilarioid diatom species distributions, indicating prolonged seasonal lake-ice cover between ~13,500 and ~8,900 cal. years BP and possibly during the 8,200 cal. years BP cold event. A pollen-based climate reconstruction generated a mean July temperature of 17.8°C during the Holocene Thermal Maximum (HTM) between ~8,900 and ~4,500 cal. years BP. Naviculoid diatoms appear in the late Holocene indicating a shortening of the seasonal ice cover that continues today. Our results reveal a strong correlation between the applied terrestrial and aquatic indicators and natural seasonal climate dynamics in the Holocene. Planktonic diatoms show a strong response to changes in the lake ecosystem due to recent climate warming in the Anthropocene. We assess other palaeolimnological studies to infer the spatiotemporal pattern of the HTM and affirm that the timing of its onset, a difference of up to 3,000 years from north to south, can be well explained by climatic teleconnections. The westerlies brought cold air to this part of Siberia until the Laurentide ice-sheet vanished 7,000 years ago. The apparent delayed ending of the HTM in the central Siberian record can be ascribed to the exceedance of ecological thresholds trailing behind increases in winter temperatures and decreases in contrast in insolation between seasons during the mid to late Holocene as well as lacking differentiation between summer and winter trends in paleolimnological reconstructions.
    Keywords: AWI_PerDyn; Permafrost Research (Periglacial Dynamics) @ AWI; SibLake
    Type: Dataset
    Format: application/zip, 12 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Pollen spectra from two different sedimentary environments in the Khatanga region, Russia (2015)
    PANGAEA
    Details
    Publication Date: 2023-03-25
    Keywords: 11-CH-lake1; 11-CH-lake10; 11-CH-lake11; 11-CH-lake12; 11-CH-lake14; 11-CH-lake16; 11-CH-lake17; 11-CH-lake18; 11-CH-lake19; 11-CH-lake2; 11-CH-lake20; 11-CH-lake5; 11-CH-lake6; 11-CH-lake7; 11-CH-lake8; 11-CH-moss10I; 11-CH-moss16I; 11-CH-moss17I; 11-CH-moss17II; 11-CH-moss2I; 11-CH-moss2II; 11-CH-moss6I; 11-CH-moss6II; 11-CH-moss6III; 11-CH-moss6IV; 13-TY-moss4K1; 13-TY-moss4K2; 13-TY-moss7K1; 13-TY-moss7K2; 13-TY-moss9K1; 13-TY-moss9K2; Alnus; AWI_PerDyn; AWI Arctic Land Expedition; Betula; Chatanga2011; Counting, palynology; Cyperaceae; DEPTH, sediment/rock; Ericaceae; Event label; Herbs; Khatanga region, Russia; LAKE; LAND; Larix; Latitude of event; Longitude of event; Permafrost Research (Periglacial Dynamics) @ AWI; Poaceae; Pollen, total; RU-Land_2011_Khatanga; Salix; Sample ID; Sampling/measurement on land; Sampling lake
    Type: Dataset
    Format: text/tab-separated-values, 308 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Loss-on-ignition analysis on composite core PG2022
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AWI_PerDyn; AWI Arctic Land Expedition; COMPCORE; Composite Core; DEPTH, sediment/rock; Lena2010; Loss of ignition analysis using a SNOL 7.2/1100 muffle furnace; Loss on ignition; Permafrost Research (Periglacial Dynamics) @ AWI; PG2022; RU-Land_2010_Lena; SibLake
    Type: Dataset
    Format: text/tab-separated-values, 150 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Radiocarbon age determination on sediment core PG2022-1
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age, 14C AMS; Age, dated; Age, dated material; Age, dated standard deviation; AWI_PerDyn; AWI Arctic Land Expedition; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Gravity corer Potsdam; Laboratory code/label; Lena2010; Ozero Kyutyunda; Permafrost Research (Periglacial Dynamics) @ AWI; PG2022-1; RU-Land_2010_Lena; SibLake; SL_P
    Type: Dataset
    Format: text/tab-separated-values, 18 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    X-ray fluorescence measurements on composite core PG2023
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AWI_PerDyn; AWI Arctic Land Expedition; Bismuth, area, total counts; Bromine, area, total counts; Calculated; COMPCORE; Composite Core; Copper, area, total counts; DEPTH, sediment/rock; Gallium, area, total counts; Lead, area, total counts; Lena2010; Molybdenum, area, total counts; Niobium, area, total counts; Permafrost Research (Periglacial Dynamics) @ AWI; PG2023; Rubidium, area, total counts; RU-Land_2010_Lena; SibLake; Strontium, area, total counts; Strontium/Rubidium ratio; X-ray fluorescence core scanner (XRF), AWI; Yttrium, area, total counts; Zinc, area, total counts; Zirconium, area, total counts; Zirconium/Rubidium ratio; Zirconium/Strontium ratio
    Type: Dataset
    Format: text/tab-separated-values, 21329 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Mineral composition of composite core PG2023
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AWI_PerDyn; AWI Arctic Land Expedition; COMPCORE; Composite Core; DEPTH, sediment/rock; Hornblende/total intensity ratio; Intensity; Kalifeldspar/total intensity ratio; Kaolinite+Chlorite/total intensity ratio; Lena2010; Mica/total intensity ratio; Permafrost Research (Periglacial Dynamics) @ AWI; PG2023; Plagioclase/total intensity ratio; Pyrite/total intensity ratio; Quartz/total intensity ratio; RU-Land_2010_Lena; Sample code/label; SibLake; X-ray diffractometry (XRD) PHILIPS PW1820 goniometer
    Type: Dataset
    Format: text/tab-separated-values, 936 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Diatom indices and sedimentation rate of composite core PG2023
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AGE; AWI_PerDyn; AWI Arctic Land Expedition; Calculated; COMPCORE; Composite Core; Counting, diatoms; DEPTH, sediment/rock; Diatom preservation index; Diatoms; Diatoms/Chrysophyte cysts ratio; Diversity; Lena2010; Permafrost Research (Periglacial Dynamics) @ AWI; PG2023; RU-Land_2010_Lena; Sedimentation rate per year; SibLake
    Type: Dataset
    Format: text/tab-separated-values, 139 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Diatoms of composite core PG2023 (2016)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: Achnanthes oblongella; Achnanthes petersenii; Achnanthes pusilla; Achnanthes rosenstockii; Achnanthes semiperta; Achnanthes sp.; Achnanthes thermalis; Achnanthidium affine; Achnanthidium eutrophilum; Achnanthidium linearioides; Achnanthidium minutissimum; Achnanthidium rosenstockii; Achnanthidium saprophilum; Achnanthidium sp.; Achnanthidium straubianum; Amphora eximia; Amphora inariensis; Amphora indistincta; Amphora lange-bertalotti; Amphora ovalis; Amphora pediculus; Amphora sp.; Aulacoseira alpigena; Aulacoseira sp.; AWI_PerDyn; AWI Arctic Land Expedition; Caloneis falcifera; Cavinula cocconeiformis; Cavinula jaernefeltii; Cavinula lapidosa; Cavinula pseudosculiformis; Cavinula sp.; Cavinula variostriata; Chrysophyte cysts; Cocconeis pediculus; Cocconeis placentula; Cocconeis sp.; Coloneis sp.; COMPCORE; Composite Core; Counting, diatoms; Cyclotella sp.; Cymbella behrei; Cymbella caespitosa; Cymbella diluviana; Cymbella sp.; Cymbopleura amphicephala; Cymbopleura cuspidata; Cymbopleura diminuta; Cymbopleura frequenz; Cymbopleura naviculiformis; Cymbopleura rhomboidea; Cymbopleura sp.; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Diatoma moniliforms var. ovalis; Diatoms, centrales; Diatoms, pennales; Diploneis elliptica; Diploneis parma; Diploneis sp.; Enzyonema herbridicum; Enzyonema lange-bertalotti; Enzyonema minutum; Enzyonema richardtii; Enzyonema silesiacum; Enzyonema sp.; Enzyonema vulgare; Epithemia adnata; Epithemia frickei; Epithemia sp.; Eunotia ambivalens; Eunotia bilunaris; Eunotia boreoalpina; Eunotia faba; Eunotia flexuosa; Eunotia incisa; Eunotia meisteri; Eunotia minor; Eunotia soleirolli; Eunotia sp.; Eunotia subarcuatoides; Fragilaria capucina; Fragilaria exiguiformis; Fragilaria famelica; Fragilaria mesolepta; Fragilaria oldenburgiana; Fragilaria parasitica; Fragilaria recapitellata; Fragilaria sp.; Fragilaria vaucheriae; Geissleria decussis; Gomphonema acuminatum; Gomphonema augustivala; Gomphonema calcareum; Gomphonema calcifugum; Gomphonema clavatulum; Gomphonema exlissimum; Gomphonema hebridense; Gomphonema innocens; Gomphonema italicum; Gomphonema micropus; Gomphonema minisculum; Gomphonema miniutum; Gomphonema pala; Gomphonema parvulum; Gomphonema pseudoaugur; Gomphonema sp.; Gyrosigma acuminatum; Gyrosigma attenuatum; Gyrosigma kuetzingii; Gyrosigma sp.; Hippodonta hungarica; Karayevia laterostrata; Karayevia suchlandtii; Lemnicola hungarica; Lena2010; Mayamaea atomus; Mayamaea fossalis var. obsidialis; Melosira nummuloides; Melosira varians; Microspheres; Navicula angusta; Navicula cryptocephala; Naviculadicta absoluta; Naviculadicta sp.; Navicula hilliardii; Navicula jentzschii; Navicula lanceolata; Navicula leptostriata; Navicula levanderi; Navicula radiosa; Navicula reinhardtii; Navicula rotunda; Navicula salinarum; Navicula schassmannii; Navicula sp.; Navicula subalpina; Navicula trivalis; Navicula trophicatrix; Navicula vaneei; Navicula wildii; Neidium affine; Neidium ampliatum; Neidium bisulcatum; Neidium sp.; Nitzschia angustrata; Nitzschia bulnheimiana; Nitzschia denticula; Nitzschia fossilis; Nitzschia radicula; Nitzschia solita; Nitzschia sp.; Nitzschia supralitorea; Paribellus protactoides; Permafrost Research (Periglacial Dynamics) @ AWI; PG2023; Pinnularia brebissonii; Pinnularia grunowii; Pinnularia lundii; Pinnularia nobilis; Pinnularia nodosa; Pinnularia rhombarea; Pinnularia sp.; Pinnularia subgibba; Pinnularia subrupestris; Pinnularia subviridis; Pinnularia viridiformis; Placoneis anglica; Placoneis clementis; Placoneis gastrum; Placoneis pediculus; Placoneis sp.; Placoneis symmetrica; Planothidium calcar; Planothidium daui; Planothidium delicatulum; Planothidium frequentissimum; Planothidium granum; Planothidium haukianum; Planothidium jouracense; Planothidium lanceolatum; Planothidium minutissimum; Planothidium oestrupii; Planothidium peragallii; Planothidium sp.; Platessa conspicua; Platessa holsatica; Platessa hustedtii; Platessa sp.; Psammothidium sp.; Psammothidium subatomoides; Psammothidium ventrale; Reimeria sinuata; Rhopalodia parallela; RU-Land_2010_Lena; Sellaphora bacillum; Sellaphora laevissima; Sellaphora minima; Sellaphora mutatoides; Sellaphora parapupula; Sellaphora pseudopupula; Sellaphora pupula; Sellaphora seminulum; Sellaphora sp.; Sellaphora stroemii; SibLake; Stauroforma exiguiformis; Stauroneis anceps; Stauroneis exiguiformis; Stauroneis gracilior; Stauroneis gracilis; Stauroneis phoenicenteron; Stauroneis smithii; Stauroneis sp.; Staurosira binodis; Staurosira brevistriata; Staurosira construens; Staurosira dubia; Staurosira lapponica; Staurosira martyii; Staurosira mutabilis; Staurosira oldenburgiana; Staurosira pinnata; Staurosira pseudoconstuens; Staurosira robusta; Staurosira sp.; Staurosira subsalina; Staurosira venter; Stephanodiscus medius; Stephanodiscus sp.; Surirella crumena; Tabellaria fenestrata; Tabellaria flocculosa; Tabellaria sp.; Tabellaria ventricosa; Tetracyclus emarginatus; Tetracyclus glans
    Type: Dataset
    Format: text/tab-separated-values, 7820 data points
    Location Call Number Limitation Availability
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