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  • 2020-2022  (2)
  • 1995-1999  (3)
Document type
Keywords
Publisher
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Diffusional Electrotitration: Generation of pH Gradients over Arrays of Ultramicroelectrodes Detected by Fluorescence (1995)
    s.l. : American Chemical Society
    Analytical chemistry 67 (1995), S. 820-828 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00101a006
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Unknown
    Sedimentology of core PG1204 (1999)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age model; AWI_PerDyn; AWI Arctic Land Expedition; Bartington MS2C coil sensor; Calcium carbonate; Carbon, organic, total; Carbon, total; COMPCORE; Composite Core; Density, wet bulk; DEPTH, sediment/rock; Element analyser CHN; Element analyser CHN, LECO; GL-Land_1994; Grain size, LASER Particle Sizer; Greenland94; Lake Nw of Noa Sø; Magnetic susceptibility, volume; Median, grain size; Multi-Sensor Core Logger 14, GEOTEK; Nitrogen, total; Permafrost Research (Periglacial Dynamics) @ AWI; PG1204; Quaternary Environment of the Eurasian North; QUEEN; Silicon dioxide; Size fraction 〈 0.002 mm, clay; Size fraction 0.0063-0.002 mm, fine silt; Size fraction 0.020-0.0063 mm, medium silt; Size fraction 0.063-0.020 mm, coarse silt; Sulfur, total; Water content, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 2862 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Unknown
    Sedimentology of core PG1200 (1999)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age model; AWI_PerDyn; AWI Arctic Land Expedition; Bartington MS2C coil sensor; Calcium carbonate; Carbon, organic, total; Carbon, total; COMPCORE; Composite Core; Density, wet bulk; DEPTH, sediment/rock; Element analyser CHN; Element analyser CHN, LECO; GL-Land_1994; Grain size, LASER Particle Sizer; Greenland94; Magnetic susceptibility, volume; Median, grain size; Multi-Sensor Core Logger 14, GEOTEK; Nitrogen, total; Noa Sø; Permafrost Research (Periglacial Dynamics) @ AWI; PG1200; Quaternary Environment of the Eurasian North; QUEEN; Silicon dioxide; Size fraction 〈 0.002 mm, clay; Size fraction 0.0063-0.002 mm, fine silt; Size fraction 0.020-0.0063 mm, medium silt; Size fraction 0.063-0.020 mm, coarse silt; Sulfur, total; Water content, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 1224 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Recordings of Fast Paleomagnetic Reversals in a 1.2 Ma Greigite‐Rich Sediment Archive From Lake Ohrid, Balkans (2020)
    Details
    Publication Date: 2020-01-24
    Description: State‐of‐the‐art paleoclimate research strongly depends on the availability of time‐equivalent markers as chronological control to disentangle interrelationships in the climate system from regional to global scale. Geomagnetic reversals are regarded as excellent age constraints because they are global events and independent from climatic conditions. However, spatial variations of timing and internal dynamics of reversals may limit their precision. Our 1.2 Ma high‐resolution (~25 cm/kyr) sediment record from Lake Ohrid is promising to precisely depict the Matuyama‐Brunhes (MB) reversal and the Jaramillo subchron. Two generations of diagenetic ferrimagnetic minerals are present in glacial intervals of the Lake Ohrid record. Early diagenetic greigite acquired a quasi synsedimentary chemical magnetization, while a late diagenetic greigite formation, triggered by the upward diffusion of H2S‐rich waters, obscures the polarity record at the top of the Jaramillo. Interglacial intervals are unaffected by greigite formation, likely due to low iron concentrations. Based on an orbitally tuned age model with tephrostratigraphic markers, the base of Jaramillo can be precisely dated to 1072.4 ka, and the MB reversal to 778.5 ka. Both polarity reversals occurred very rapidly in our record, lasting 2.3 and 1 kyr, respectively. Our results reveal that the dipole component of the Earth's magnetic field fell below the nondipole components only for a short duration in the Mediterranean region. The comparison of the timing of the MB boundary across different archives implies that the onset of the reversal provides a more synchronous age marker compared to often used midpoint ages.
    Description: Published
    Description: 12445-12464
    Description: 1A. Geomagnetismo e Paleomagnetismo
    Description: JCR Journal
    Keywords: paleomagnetism lake sediments geomagnetic reversals ; 04.05. Geomagnetism
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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    PAPER (OA)
  • 5
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    Climatic and environmental changes in the Yana Highlands of north‐eastern Siberia over the last c. 57 000 years, derived from a sediment core from Lake Emanda (2021)
    Details
    Publication Date: 2021-07-21
    Description: The sediment succession of Lake Emanda in the Yana Highlands was investigated to reconstruct the regional late Quaternary climate and environmental history. Hydro‐acoustic data obtained during a field campaign in 2017 show laminated sediments in the north‐western and deepest (up to ̃15 m) part of the lake, where a ̃6‐m‐long sediment core (Co1412) was retrieved. The sediment core was studied with a multi‐proxy approach including sedimentological and geochemical analyses. The chronology of Co1412 is based on 14C AMS dating on plant fragments from the upper 4.65 m and by extrapolation suggests a basal age of c. 57 cal. ka BP. Pronounced changes in the proxy data indicate that early Marine Isotope Stage (MIS) 3 was characterized by unstable environmental conditions associated with short‐term temperature and/or precipitation variations. This interval was followed by progressively colder and likely drier conditions during mid‐MIS 3. A lake‐level decline between 32.0 and 19.1 cal. ka BP was presumably related to increased continentality and dry conditions peaking during the Last Glacial Maximum (LGM). A subsequent rise in lake level could accordingly have been the result of increased rainfall, probably in combination with seasonally high meltwater input. A milder or wetter Lateglacial climate increased lake productivity and vegetation growth, the latter stabilizing the catchment and reducing clastic input into the lake. The Bølling‐Allerød warming, Younger Dryas cooling and Holocene Thermal Maximum (HTM) are indicated by distinct changes in the environment around Lake Emanda. Unstable, but similar‐to‐present‐day climatic and environmental conditions have persisted since c. 5 cal. ka BP. The results emphasize the highly continental setting of the study site and therefore suggest that the climate at Lake Emanda was predominantly controlled by changes in summer insolation, global sea level, and the extent of ice sheets over Eurasia, which influenced atmospheric circulation patterns.
    Description: Bundesministerium für Bildung und Forschung
    Keywords: 551 ; Siberia ; Lake Emanda ; late Quaternary ; climate history ; environmental history
    Type: article
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    CITATION GEO-LEO
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