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  • 1
    Call number: ZSP-202-347
    In: Research report / Cold Regions Research and Engineering Laboratory, 347
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Introduction. - Experimental. - Results and discussion. - Applications. - Literature cited.
    Description / Table of Contents: Chemical analysis of century-old ice from continuous 5 to 7 year intervals of three ice cores from south and central Greenland (Dye 3, Milcent and Crete) show maximum concentrations of Na, Mg,Ca, K, and Al during early spring and minimum concentrations during late summer and early fall. Peak spring values are as much as 10 times greater than fall values. Because of the large seasonal chemical variations, samples used for depth-age or annual deposition rate studies must represent accumulation from exactly one year or whole multiples of a year. The seasonal chemical variations seem promising as a new method of defining annual layers and thus dating old ice cores.
    Type of Medium: Series available for loan
    Pages: iii, 5 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 347
    Language: English
    Location: AWI Archive
    Branch Library: AWI Library
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  • 2
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-316
    In: Research report
    Description / Table of Contents: Measurements of the concentrations of Na+, K+, Mg++ and Ca++ were made on 28 samples from the 255-m-deep ice core from Little America V. All concentrations decrease sharply with depth from the firn-ice transition at 52 m to somewhere between 125 m and 150 m. From 150 m to 250 m the cationic concentrations are relatively constant. This is interpreted to indicate that the ice above 125 m fell as snow on the Ross Ice Shelf and that ice below 150 m originated inland on Marie Byrd Land.
    Type of Medium: Series available for loan
    Pages: ii, 7 S. : graph. Darst.
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 316
    Branch Library: AWI Library
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  • 3
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Materiel Command, Cold Regions Research & Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-236
    In: Research report
    Description / Table of Contents: In March 1966 at the Tuto ice tunnel, Greenland, a team from USA CRREL and the University of Bern tested a new down-borehole device which would allow gas to be extracted from within shallow or deep boreholes. The tunnel ice was unfractured and its temperature was constant at -10°C. A location where, in 1964, C-14 age dates had been obtained was used as a check point for the down-borehole tests. Comparative samples show good agreement and indicate a mean value of 5120 years B. P. for the age of ice at this location. The simplicity of the downborehole gas extraction system enables application of the carbon dating method to any natural, undisturbed glacier ice mass which can be sampled by boring. The gas extraction apparatus and field experiments are described.
    Type of Medium: Series available for loan
    Pages: iii, 4 S. : Ill.
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 236
    Branch Library: AWI Library
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  • 4
    Call number: G 9084 ; AWI G7-91-0409 ; M 91.0560
    In: Physical, chemical, and earth sciences research report
    Type of Medium: Monograph available for loan
    Pages: XI, 400 S. : Ill., graph. Darst.
    ISBN: 0471921858
    Series Statement: Physical, chemical, and earth sciences research report 8
    Language: English
    Note: Table of Contents: The Dahlem Konferenzen / S. Bernhard. - Introduction / H. Oeschger and C. C. Langway, Jr. - Aerosol transport from sources to ice sheets / G. E. Shaw. - Mechanisms of wet and dry deposition of atmospheric contaminants to snow surfaces / C. I. Davidson. - The transformation of snow to ice and the occlusion of gases / J. Schwander. - Environmental records in alpine glaciers / D. Wagenbach. - GROUP REPORT. - How do glaciers record environmental processes and preserve information? / J. W. C. White, P. Brimblecombe, C. Brühl, C. I. Davidson, R. J. Delmas, G. Gravenhorst, K. O. Münnich, S. A. Penkett, U. Schotterer, J. Schwander, G. E. Shaw, D. Wagenbach. - Dating by physical and chemical seasonal variations and reference horizons / C. U. Hammer. - Dating of ice by radioactive isotopes / B. R. Stauffer. - Dating by ice flow modeling: a useful tool or an exercise in applied mathematics? / N. Reeh. - Physical property reference horizons / H. Shoji and C. C. Langway, Jr. - GROUP REPORT. - How can an ice core chronology be established? / W. F. Budd, J. T. Andrews, R. C. Finkel, E. L. Fireman, W. Graf, C. U. Hammer, J. Jouzel, D. P. Raynaud, N. Reeh, H. Shoji, B. R. Stauffer, J. Weertman. - Temporal variations of trace gases in ice cores / M. A. K. Khalil and R. A. Rasmussen. - Trace metals and organic compounds in ice cores / D. A. Peel. - The ionic deposits in polar ice cores / H. B. Clausen and C. C. Langway, Jr. - The impact of observed changes in atmospheric composition on global atmospheric chemistry and climate / P. J. Crutzen and C. Brühl. - GROUP REPORT. - What anthropogenic impacts are recorded in glaciers? / G. I. Pearman, R. J. Charlson, T. Class, H. B. Clausen, P. J. Crutzen, T. Hughes, D. A. Peel, K. A. Rahn, J. Rudolph, U. Siegenthaler, D. S. Zardini. - Past environmental long-term records from the Arctic / W. Dansgaard and H. Oeschger. - Long-term changes in the concentrations of major chemical compounds (soluble and insoluble) along deep ice cores / R. J. Delmas and M. Legrand. - Long-term environmental records from Antarctic ice cores / C. Lorius, G. Raisbeck, J. Jouzel, and D. Raynoud. - Studies of polar ice: insights for atmospheric chemistry / M. B. McElroy. - GROUP REPORT. - Long-term ice core records and global environmental changes / A. D. Hecht, W. Dansgaard, J. A. Eddy, S. J. Johnsen, M. A. Lange, C. C. Langway, Jr., C. Lorius, M. B. McElroy, H. Oeschger, G. Raisbeck, P. Schlosser. - List of participants with fields of research. - Subject index. - Author index.
    Location: Upper compact magazine
    Location: AWI Reading room
    Branch Library: GFZ Library
    Branch Library: AWI Library
    Branch Library: GFZ Library
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  • 5
    Call number: ZSP-201-76/24
    In: CRREL Report, 76-24
    Description / Table of Contents: Chemical analysis of surface snows and deeper ice core samples from Milcent, Greenland, indicates a marine origin for Na and Cl and a terrestrial origin for Al, Mn and V. Pre-1900 enrichment factors, based on average crustal composition, are high for Zn and Hg and appear to be related to their volatility. A comparison of pre-1900 and 1971-1973 concentrations of V and Hg shows no decided increase from industrial production; however, the abundance of Zn (relative to Al) increased three-fold during this time period. The chemical composition of ancient ice is extremely useful in interpreting modern aerosols.
    Type of Medium: Series available for loan
    Pages: ii, 6 Seiten , Illustrationen
    Series Statement: CRREL Report 76-24
    Language: English
    Location: AWI Archive
    Branch Library: AWI Library
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 227 (1970), S. 482-483 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Spectral analyses based on the Fourier integral were carried out on the continuous S-record indicating systematic long-term oscillations of the climate with periods of 400 and 2,400 years9. An anti-phase correlation with similar variations of the carbon-14 concentration in tree-rings during the ...
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0168-583X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 235 (1972), S. 429-434 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Camp Century, Greenland, deep ice core reveals seasonal variations in the isotopic composition of the ice back to 8,300 years BP. This is not the case for the Byrd Station, Antarctica, deep ice core. Both cores show long-term perturbations in isotopic composition reflecting climatic ...
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 8 (1990), S. 17-24 
    ISSN: 1573-1111
    Keywords: Air-hydrate ; clathrate ; ice core ; guest molecule
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract We have carried out X-ray diffraction studies on single crystals of natural air-hydrate in deep ice cores recovered at Dye-3 Greenland. Integrated intensities for 470 diffracting planes were measured by an automated four-circle diffractometer. The space group determined is cubicFd3m and the lattice constant is 17.21(3) Å. These results indicate that the crystallographic structure is the Stackelberg's structure II, in contrast to the previously anticipated structure. This finding agrees with the recent results on the synthetic air-hydrate by Davidsonet al. It was also found by difference Fourier synthesis for guest molecules that electron density in a 16-hedral cage has multiple maxima displaced from the center of the cage while that in the 12-hedron was approximately spherical.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Climatic change 35 (1997), S. 1-15 
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The 2191 m long ice core recovered at Byrd Station Antarctica in 1968 (BS68) was measured continuously by an electrical conductivity method (ECM). The ECM curve inferes the acidity of seasonal ice layers and major peaks, which identify clearly intermediate and prominent past volcanic activity over the last 50,000 years. We here also present recent data for a suite of the most striking volcanic events that occurred around 17.5 ka ± 0.5 BP. These events emitted enormous amounts of HCl and HF into the atmosphere.
    Type of Medium: Electronic Resource
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