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  • Cambridge University Press  (20)
  • 2000-2004  (12)
  • 1980-1984  (5)
  • 1970-1974  (2)
  • 1945-1949
  • 1930-1934  (1)
  • 1
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    Radiocarbon Beyond this World (2000)
    Cambridge University Press
    Details
    Publication Date: 2000-01-01
    Description: In this paper, we review the production of radiocarbon and other radionuclides in extraterrestrial materials. This radioactivity can be produced by the effects of solar and galactic cosmic rays on solid material in space. In addition, direct implantation at the lunar surface of 14C and other radionuclides can occur. The level of 14C and other radionuclides in a meteorite can be used to determine its residence time on the Earth's surface, or “terrestrial age”. 14C provides the best tool for estimating terrestrial ages of meteorites collected in desert environments. Age control allows us to understand the time constraints on processes by which meteorites are weathered, as well as mean storage times. Third, we discuss the use of the difference in 14C/12C ratio of organic material and carbonates produced on other planetary objects and terrestrial material. These differences can be used to assess the importance of distinguishing primary material formed on the parent body from secondary alteration of meteoritic material after it lands on the earth.
    Print ISSN: 0033-8222
    Electronic ISSN: 1945-5755
    Topics: Archaeology , Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Published by Cambridge University Press
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  • 2
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    Can We Use Cosmogenic Isotopes to Date Stone Artifacts? (2001)
    Cambridge University Press
    Details
    Publication Date: 2001-01-01
    Description: Two chert artifacts from the region near Luxor, Egypt have yielded concentrations of cosmogenic 10Be that allow calculation of nominal exposure ages of 326,000 and 304,000 years. Both artifacts are flakes that were collected atop limestone benches of the Eocene Thebes Formation which form cliffs along the west side of the Nile. The site is at elevation 240 m and is about 15 km from the Nile. Tools associated with these artifacts can be attributed to the Late Acheulean or early Middle Paleolithic (the transition has been suggested to have been on the order of 250,000–300,000 years ago). This area, where abundant chert nodules have weathered out, has been a collection, extraction, and fabrication site since the Early Paleolithic (since at least 400,000 years ago). Surface exposure dating records all periods of exposure. That means these ages represent composite ages, comprised of exposures both before and after working. But what fraction of the 10Be concentration we have measured was acquired before the flakes were produced? Here we propose several approaches to deconvolute the different exposure periods and better approximate the real age of the artifacts. As there is no a priori reason that the two ages should agree with the typological ages of the artifacts, nor for the two independent ages to agree, these first results are especially exciting and intriguing.
    Print ISSN: 0033-8222
    Electronic ISSN: 1945-5755
    Topics: Archaeology , Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Published by Cambridge University Press
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  • 3
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    Preliminary Report of the First Workshop of the Intcal04 Radiocarbon Calibration/Comparison Working Group (2002)
    Cambridge University Press
    Details
    Publication Date: 2002-01-01
    Description: The first meeting of the IntCal04 working group took place at Queen's University Belfast from April 15 to 17, 2002. The participants are listed as co-authors of this report. The meeting considered criteria for the acceptance of data into the next official calibration dataset, the importance of including reliable estimates of uncertainty in both the radiocarbon ages and the cal ages, and potential methods for combining datasets. This preliminary report summarizes the criteria that were discussed, but does not yet give specific recommendations for inclusion or exclusion of individual datasets.
    Print ISSN: 0033-8222
    Electronic ISSN: 1945-5755
    Topics: Archaeology , Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Published by Cambridge University Press
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  • 4
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    Rice University Radiocarbon Dates I (1973)
    Cambridge University Press
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    Publication Date: 1973-01-01
    Description: The radiocarbon dating laboratory at Rice University first became operative in the fall of 1970. A workable technique has been developed although operations are still in a state of flux. The benzene liquid scintillation counting method is used, the benzene being prepared as outlined by Noakes, Kim, and Akers (1967) with the following modifications. The CO2 is further purified prior to storage and measuring by passing it through 3 gas bubblers containing potassium permanganate solution, silver nitrate solution, and a sulfuric acid-sodium dichromate solution (S. Valastro, pers. commun., 1970). Since no C12 C13 analyses are available at present, to insure a complete reaction, both the CO2 generation and the C2H2 generation are continued for ½ hr after all visible signs of reaction have disappeared.
    Print ISSN: 0033-8222
    Electronic ISSN: 1945-5755
    Topics: Archaeology , Energy, Environment Protection, Nuclear Power Engineering , Geosciences
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  • 5
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    Twenty years on: the UN and the ‘Question of Antarctica,’ 1983–2003 (2004)
    Cambridge University Press
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    Publication Date: 2004-07-01
    Description: The United Nations (UN) has now been involved with the ‘Question of Antarctica’ for 20 years. Divisions within the international community about the most appropriate form of management for Antarctica, which was presented to the UN as a region of global importance, have never completely disappeared, even if the restoration of a consensus approach during the mid-1990s was based upon a broader appreciation of the merits of the Antarctic Treaty System. Both Antarctic Treaty Consultative Parties and non-Consultative Parties, pointing to the regime's enduring intrinsic qualities, have adopted an unyielding attitude towards Treaty outsiders advocating a more democratic, accountable, and transparent regime. Even so, the critical lobby, led by Dr Mahathir's Malaysian government, has never gone away. Initially, the ‘Question of Antarctica’ was discussed at the UN on an annual basis, but since 1996 it has been placed on a triennial reference. Following the most recent session in late 2002, the topic is scheduled to be placed on the UN's agenda again in 2005. This article reviews critically the key themes characterising the UN's involvement in the ‘Question of Antarctica’ since 1983, while using successive Polar Record articles on individual UN sessions to provide a framework of reference and an informed basis for further research on the topic.
    Print ISSN: 0032-2474
    Electronic ISSN: 1475-3057
    Topics: Ethnic Sciences , Geography
    Published by Cambridge University Press
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  • 6
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    The United Nations and Antarctica, 2002: ‘constructive engagement’ between the Antarctic Treaty System and the United Nations (2003)
    Cambridge University Press
    Details
    Publication Date: 2003-06-26
    Description: At the close of 2002, the United Nations (UN), acting in accordance with its 1999 resolution A54/45, returned to the ‘Question of Antarctica,’ which is currently being placed upon the agenda of the General Assembly's First Committee (Disarmament and International Security) every three years. In 2002, the First Committee's discussions, informed yet again by a report produced by the UN Secretary-General (UNSG) updating members about recent Antarctic developments, reaffirmed the varying perspectives existing within the international community about the management of Antarctica. Following statements delivered by the Polish delegate on behalf of the Antarctic Treaty Parties (ATPs) and the Malaysian representative, the First Committee adopted another consensus draft resolution. Subsequently, the UN General Assembly, acting by consensus without a vote, formally adopted the First Committee's draft as resolution A57/51, which basically updated the wording of that adopted in 1999. Thus, the UNSG was instructed to produce another report to guide the next UN session on the ‘Question of Antarctica’ scheduled for 2005. Although the UN discussions on the topic in 2002 proved relatively brief and low key, the actions of Malaysia during the past year or so have raised a number of questions about the future course of the ‘Question of Antarctica,’ given its lead role in first raising the topic at the UN in 1983 and then maintaining pressure upon the Antarctic Treaty System.
    Print ISSN: 0032-2474
    Electronic ISSN: 1475-3057
    Topics: Ethnic Sciences , Geography
    Published by Cambridge University Press
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  • 7
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    The United Nations and Antarctica (1984)
    Cambridge University Press
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    Publication Date: 1984-05-01
    Description: The United Nations as a body has hitherto shown little interest or involvement in Antarctica. A recently developed campaign, led by several of the developing nations, now aims to involve the international community more closely in the management of the continent and its resources. Argument that Antarctica should be regarded as part of the common heritage of mankind finds little support among Antarctic Treaty nations, who favour continuing management under the treaty system. A nine-hour discussion in the First Committee of the United Nations General Assembly during November 1983 resulted in a resolution on ‘the question of Antarctica’ which the General Assembly adopted unanimously on 15 December; the Secretary-General has been asked to report on ‘all aspects of Antarctica’ in time for further discussion in September 1984.
    Print ISSN: 0032-2474
    Electronic ISSN: 1475-3057
    Topics: Ethnic Sciences , Geography
    Published by Cambridge University Press
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  • 8
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    Britain's role in the Antarctic: some recent changes in organization (1984)
    Cambridge University Press
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    Publication Date: 1984-01-01
    Print ISSN: 0032-2474
    Electronic ISSN: 1475-3057
    Topics: Ethnic Sciences , Geography
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  • 9
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    British Antarctic Policy in the Early 20th Century (1983)
    Cambridge University Press
    Details
    Publication Date: 1983-05-01
    Description: World War I has often been said to mark the end of the ‘Age of Imperialism’—the close of ‘that final surge of land hunger’ (Landes 1969) from 1880 to 1914 when much of the world's land surface, especially in Africa and the Pacific, was acquired by the major powers. Britain's large share was demonstrated by the predominance of red on pre-1914 maps, though in fact the British Empire achieved its greatest area after 1918; ‘… including India’, reported the 1920 Colonial Office List, ‘the Empire now extends over 11 million of square miles, or 91 times the area of the Mother Country’ (Mercer 1920). This study examines one specific part of British imperial policy in the immediate post-war years—one which, had it been fully implemented, would have increased the area by a further 40 per cent. In the view of L. S. Amery, Under-Secretary of State at the Colonial Office and one of Britain's leading politicians of the time, it was desirable that:… the whole of the Antarctic should ultimately be included within the British Empire, and that, while the time has not yet arrived that a claim to all the continental territories should be put forward publicly, a definite and consistent policy should be followed of extending and asserting British control with the object of ultimately making it complete.
    Print ISSN: 0032-2474
    Electronic ISSN: 1475-3057
    Topics: Ethnic Sciences , Geography
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  • 10
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    The UN and Antarctica, 1999: the continuation of consensus (2000)
    Cambridge University Press
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    Publication Date: 2000-10-01
    Description: In 1999 the United Nations, acting in accordance with the 1996 resolution A51/56, discussed the ‘Question of Antarctica’ again. The UN, having taken up the topic on an annual basis in 1983, is currently placing it upon the First Committee's agenda every three years. The next reference will be in 2002. In 1999 the UN First Committee discussions, guided by a report produced by the UN Secretary-General (UNSG) updating members on recent Antarctic developments, indicated that disagreements still remain about the management of Antarctica. Meanwhile, members adopted another consensus resolution, A54/45, which largely replicated the wording of its 1996 predecessor, most notably in requesting the UNSG to produce another report to guide the next UN discussion scheduled for 2002. Earlier in 1999, the Lima Declaration, adopted by the Antarctic Treaty Parties in May, highlighted the view that the ATS, although linking up increasingly with UN organisations like the United Nations Environment Program, continues to offer the way forward for Antarctica in the twenty-first century.
    Print ISSN: 0032-2474
    Electronic ISSN: 1475-3057
    Topics: Ethnic Sciences , Geography
    Published by Cambridge University Press
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