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  • 1
    Monograph available for loan
    Monograph available for loan
    Deutschsprachige Polarliteratur : Zusammenstellung Frank Pultar, Lübeck, ergänzt von Diedrich Fritzsche, Potsdam (2001)
    Potsdam
    Details Availability
    Call number: AWI P7-01-0275
    Type of Medium: Monograph available for loan
    Pages: 39 S.
    Branch Library: AWI Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    Radiometrische Aschegehaltsbestimmung von Braunkohle unter besonderer Berücksichtigung der Anwendung vorwärtsgestreuter 60 keV Quantenstrahlung (1988)
    Berlin
    Details Availability
    Call number: Q 3436
    Type of Medium: Monograph available for loan
    Pages: 132 S.
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 3
    Series available for loan
    Series available for loan
    Radiometrische Aschegehaltsbestimmung von Braunkohle unter besonderer Berücksichtigung der Anwendung vorwärtsgestreuter 60 keV-Quantenstrahlung (1990)
    Potsdam
    Associated volumes
    Details Availability
    Call number: 21/S 90.0917(112)
    Type of Medium: Series available for loan
    Pages: 133 S.
    Series Statement: Veröffentlichungen des Zentralinstituts für Physik der Erde 112
    Language: German
    Location: Reading room
    Branch Library: GFZ Library
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  • 4
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    Age model and stable oxygen isotope mean values of ice core SZ99 from Akademii Nauk ice cap on Severnaya Zemlya (2006)
    PANGAEA
    In:  Supplement to: Fritzsche, Diedrich; Schütt, Rainer; Meyer, Hanno; Miller, Heinz; Wilhelms, Frank; Opel, Thomas; Savatyugin, Lev M (2005): A 275 year ice core record from Akademii Nauk ice cap, Severnaya Zemlya, Russian Arctic. Annals of Glaciology, 42, 361-366, https://doi.org/10.3189/172756405781812862
    Details
    Publication Date: 2023-03-07
    Description: Between 1999 and 2001, a 724 m long ice core was drilled on Akademii Nauk, the largest glacier on Severnaya Zemlya, Russian Arctic. The drilling site is located near the summit. The core is characterized by high melt-layer content. The melt layers are caused by melting and even by rain during the summer. We present high-resolution data of density, electrical conductivity (dielectrical profiling), stable water isotopes and melt-layer content for the upper 136 m (120 m w.e.) of the ice core. The dating by isotopic cycles and electrical conductivity peak identification suggests that this core section covers approximately the past 275 years. Singularities of volcanogenic and anthropogenic origin provide well-defined additional time markers. Long-term temperatures inferred from 12 year running mean averages of d18O reach their lowest level in the entire record around 1790. Thereafter the d18O values indicate a continuously increasing mean temperature on the Akademii Nauk ice cap until 1935, interrupted only by minor cooling episodes. The 20th century is found to be the warmest period in this record.
    Keywords: Age; AGE; Age model, layer counting; Akademii Nauk, Severnaya Zemlya, Russian Arctic; AWI_PerDyn; AWI Arctic Land Expedition; Calculated average/mean values; Calculated from density; Calculated moving averages; DEPTH, ice/snow; Depth water equivalent; ICEDRILL; Ice drill; Permafrost Research (Periglacial Dynamics) @ AWI; RU-Land_1999/2001_SevernayaZemly; SZ_1999/2001; SZ99; δ18O; δ18O, water
    Type: Dataset
    Format: text/tab-separated-values, 676 data points
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  • 5
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    Annual-layer thickness, δ¹⁸O and sodium values on Akademii Nauk ice core (AD 900-1998) based on core chronology AN 2012 (2013)
    PANGAEA
    In:  Supplement to: Opel, Thomas; Fritzsche, Diedrich; Meyer, Hanno (2013): Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya). Climate of the Past, 9(5), 2379-2389, https://doi.org/10.5194/cp-9-2379-2013
    Details
    Publication Date: 2023-06-27
    Description: Understanding recent Arctic climate change requires detailed information on past changes, in particular on a regional scale. The extension of the depth–age relation of the Akademii Nauk (AN) ice core from Severnaya Zemlya (SZ) to the last 1100 yr provides new perspectives on past climate fluctuations in the Barents and Kara seas region. Here, we present the easternmost high-resolution ice-core climate proxy records (d18O and sodium) from the Arctic. Multi-annual AN d18O data as near-surface air-temperature proxies reveal major temperature changes over the last millennium, including the absolute minimum around 1800 and the unprecedented warming to a double-peak maximum in the early 20th century. The long-term cooling trend in d18O is related to a decline in summer insolation but also to the growth of the AN ice cap as indicated by decreasing sodium concentrations. Neither a pronounced Medieval Climate Anomaly nor a Little Ice Age are detectable in the AN d18O record. In contrast, there is evidence of several abrupt warming and cooling events, such as in the 15th and 16th centuries, partly accompanied by corresponding changes in sodium concentrations. These abrupt changes are assumed to be related to sea-ice cover variability in the Barents and Kara seas region, which might be caused by shifts in atmospheric circulation patterns. Our results indicate a significant impact of internal climate variability on Arctic climate change in the last millennium.
    Keywords: Age; AGE; Akademii Nauk; Akademii Nauk, Severnaya Zemlya, Russian Arctic; AN; Annual layer thickness; AWI_PerDyn; AWI Arctic Land Expedition; ICEDRILL; Ice drill; Ion chromatograph, Dionex Corporation, IC-20; Mass spectrometer Finnigan Delta-S; Permafrost Research (Periglacial Dynamics) @ AWI; RU-Land_1999/2001_SevernayaZemly; Sodium; SZ_1999/2001; δ18O, water
    Type: Dataset
    Format: text/tab-separated-values, 4396 data points
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  • 6
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    EPICA Dronning Maud Land EDML ice core drilling protocol (2014)
    PANGAEA
    In:  Supplement to: Wilhelms, Frank; Miller, Heinz; Gerasimoff, Michael D; Drücker, Cord; Frenzel, Andreas; Fritzsche, Diedrich; Grobe, Hannes; Hansen, Steffen Bo; Hilmarsson, Sverrir Æ; Hoffmann, Georg; Hörnby, Kerstin; Jaeschke, Andrea; Jakobsdottir, Steinunn S; Juckschat, Paul; Karsten, Achim; Karsten, Lorenz; Kaufmann, Patrik R; Karlin, Torbjörn; Kohlberg, Eberhard; Kleffel, Guido; Lambrecht, Anja; Lambrecht, Astrid; Lawer, Gunther; Schärmeli, Ivan; Schmitt, Jochen; Sheldon, Simon G; Takata, Morimasa; Trenke, Marcus; Twarloh, Birthe; Valero Delgado, Fernando; Wilhelms-Dick, Dorothee (2014): The EPICA Dronning Maud Land deep drilling operation. Annals of Glaciology, 55(68), 355-366, https://doi.org/10.3189/2014AoG68A189
    Details
    Publication Date: 2023-06-27
    Description: We report on the EPICA Dronning Maud Land (East Antarctica) deep drilling operation. Starting with the scientific questions that led to the outline of the EPICA project, we introduce the setting of sister drillings at NorthGRIP and EPICA Dome C within the European ice-coring community. The progress of the drilling operation is described within the context of three parallel, deep-drilling operations, the problems that occurred and the solutions we developed. Modified procedures are described, such as the monitoring of penetration rate via cable weight rather than motor torque, and modifications to the system (e.g. closing the openings at the lower end of the outer barrel to reduce the risk of immersing the drill in highly concentrated chip suspension). Parameters of the drilling (e.g. core-break force, cutter pitch, chips balance, liquid level, core production rate and piece number) are discussed. We also review the operational mode, particularly in the context of achieved core length and piece length, which have to be optimized for drilling efficiency and core quality respectively. We conclude with recommendations addressing the design of the chip-collection openings and strictly limiting the cable-load drop with respect to the load at the start of the run.
    Keywords: Break strength; Comment; Core length; Density, mass density; DEPTH, ice/snow; EDML; EDRILL; EPICA; EPICA-Campaigns; EPICA drill; EPICA Dronning Maud Land, DML28C01_00; European Project for Ice Coring in Antarctica; Kohnen Station; Level; Mass; Number; Pitch, lower limit; Pitch, upper limit; Run; Run Date/Time; Temperature, technical; Volume
    Type: Dataset
    Format: text/tab-separated-values, 14880 data points
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  • 7
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    10Be measured on Akademii Nauk ice core, Russian Arctic, for the period 1590-1950 CE (2017)
    PANGAEA
    In:  Supplement to: von Albedyll, Luisa; Opel, Thomas; Fritzsche, Diedrich; Merchel, Silke; Laepple, Thomas; Rugel, Georg (2017): 10Be in the Akademii Nauk ice core – first results for CE 1590–1950 and implications for future chronology validation. Journal of Glaciology, 1-9, https://doi.org/10.1017/jog.2017.19
    Details
    Publication Date: 2023-06-27
    Description: Global variations of the radionuclide 10Be that are almost simultaneous provide a powerful tool to synchronize 10Be records from different locations. We compared the 10Be record of the Akademii Nauk (AN) ice core (Russian Arctic) for the time period CE 1590-1950 to the 10Be records of two well-dated Greenland ice cores (Dye3 and NGRIP). A high correlation (r=0.60) was found between the AN and Dye3 records, which increases up to 0.78 in certain intervals, whereas the correlation to NGRIP was distinctly lower. Sources of deviations may include local fluctuations in the deposition of 10Be due to changes in the precipitation patterns, artefacts due to the core-sampling strategy and a general bias in the age model. In general, the existing age model was validated confirming the AN ice core to be a unique and well-dated source of palaeoclimate parameters for the Russian Arctic. Because of a possible minor bias in the earliest part of the studied ice-core section, the influence of the core-sampling strategy was studied, based on a numerical model that simulates sampling in a discrete and continuous mode with varying sample lengths. Based on the results of the model to sample continuously with individual samples lengths covering a time span of 4-8 years we developed a new sample strategy for the deeper layers.
    Keywords: Accelerator mass spectrometry (AMS); Age; AGE; Akademii Nauk; Akademii Nauk, Severnaya Zemlya, Russian Arctic; AN; AWI Arctic Land Expedition; Beryllium-10, standard deviation; Beryllium-10, water; Correction; Depth, bottom/max; DEPTH, ice/snow; Depth, top/min; ICEDRILL; Ice drill; RU-Land_1999/2001_SevernayaZemly; SZ_1999/2001
    Type: Dataset
    Format: text/tab-separated-values, 462 data points
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  • 8
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    Stable isotopes, major ions and melt-layer content of the Akademii Nauk ice core (AD 1883-1998) (Figure 6)
    PANGAEA
    In:  Supplement to: Opel, Thomas; Fritzsche, Diedrich; Meyer, Hanno; Schütt, Rainer; Weiler, Karin; Ruth, Urs; Wilhelms, Frank; Fischer, Hubertus (2009): 115 year ice-core data from Akademii Nauk ice cap, Severnaya Zemlya: high-resolution record of Eurasian Arctic climate change. Journal of Glaciology, 55(189), 21-31, https://doi.org/10.3189/002214309788609029
    Details
    Publication Date: 2023-05-12
    Description: From 1999 to 2001 a 724 m deep ice core was drilled on Akademii Nauk ice cap, Severnaya Zemlya, to gain high-resolution proxy data from the central Russian Arctic. Despite strong summertime meltwater percolation, this ice core provides valuable information on the regional climate and environmental history. We present data of stable water isotopes, melt-layer content and major ions from the uppermost 57 m of this core, covering the period 1883-1998. Dating was achieved by counting seasonal isotopic cycles and using reference horizons. Multi-annual d18O values reflect Eurasian sub-Arctic and Arctic surface air-temperature variations. We found strong correlations to instrumental temperature data from some stations (e.g. r = 0.62 for Vardø, northern Norway). The d18O values show pronounced 20th-century temperature changes, with a strong rise about 1920 and the absolute temperature maximum in the 1930s. A recent decrease in the deuterium-excess time series indicates an increasing role of the Kara Sea as a regional moisture source. From the multi-annual ion variations we deduced decreasing sea-salt aerosol trends in the 20th century, as reflected by sodium and chloride, whereas sulphate and nitrate are strongly affected by anthropogenic pollution.
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 9
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    Stable isotopes and major ions of the Akademii Nauk ice core (AD 1883-1998) (Figure 6)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age; AGE; Akademii Nauk; Akademii Nauk, Severnaya Zemlya, Russian Arctic; AN; AWI Arctic Land Expedition; Calcium; Calculated; Chloride; Deuterium excess; ICEDRILL; Ice drill; Ion chromatograph, Dionex Corporation, IC-20; Magnesium; Mass spectrometer Finnigan Delta-S; Nitrate; RU-Land_1999/2001_SevernayaZemly; Sodium; Sulfate; SZ_1999/2001; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 1160 data points
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  • 10
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    Melt-layer content of the Akademii Nauk ice core (AD 1883-1998)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age; AGE; Akademii Nauk; Akademii Nauk, Severnaya Zemlya, Russian Arctic; AN; AWI Arctic Land Expedition; Calculated; ICEDRILL; Ice drill; Melt layer content; RU-Land_1999/2001_SevernayaZemly; SZ_1999/2001
    Type: Dataset
    Format: text/tab-separated-values, 114 data points
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