GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Reduction of CO 2 -to-Graphite Conversion Time of Organic Materials for 14 C AMS
    Cambridge University Press (CUP) ; 1992
    In:  Radiocarbon Vol. 34, No. 3 ( 1992), p. 330-334
    Details
    In: Radiocarbon, Cambridge University Press (CUP), Vol. 34, No. 3 ( 1992), p. 330-334
    Abstract: Graphite is the most common type of target for 14 C accelerator mass spectrometry (AMS). It is readily produced by catalytic reduction of CO 2 , but the presence of a small amount of impurities ( e.g., sulfur compounds) may retard the reaction. We have tested some techniques to find a method that reduces the impurity content of CO 2 produced by combustion of organic material. We found that using water during combustion reduces the average time for graphite conversion of CO 2 from organic matter from 〉 3 h to ca. 2 h. This is the time for graphite production from CO 2 obtained by acid hydrolysis of calcite. Measurements of known-age and background samples show that this combustion method neither changes the isotopic ratios nor introduces any additional background.
    Type of Medium: Online Resource
    ISSN: 0033-8222 , 1945-5755
    URL: Article
    DOI: 10.1017/S0033822200063505
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1992
    detail.hit.zdb_id: 2028560-7
    SSG: 11
    SSG: 13
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Report of the TIRI Workshop, Saturday 13 August 1994
    Cambridge University Press (CUP) ; 1995
    In:  Radiocarbon Vol. 37, No. 2 ( 1995), p. 820-821
    Details
    In: Radiocarbon, Cambridge University Press (CUP), Vol. 37, No. 2 ( 1995), p. 820-821
    Type of Medium: Online Resource
    ISSN: 0033-8222 , 1945-5755
    URL: Article
    DOI: 10.1017/S0033822200031404
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1995
    detail.hit.zdb_id: 2028560-7
    SSG: 11
    SSG: 13
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Trondheim Natural Radiocarbon Measurements VII
    Cambridge University Press (CUP) ; 1975
    In:  Radiocarbon Vol. 17, No. 3 ( 1975), p. 364-395
    Details
    In: Radiocarbon, Cambridge University Press (CUP), Vol. 17, No. 3 ( 1975), p. 364-395
    Abstract: Most dates in this list were obtained in the period 1970 to 1972. Treatment of samples and counting equipment have remained essentially the same as described previously (R, 1972, v 14, p 418–419).
    Type of Medium: Online Resource
    ISSN: 0033-8222 , 1945-5755
    URL: Article
    DOI: 10.1017/S0033822200059865
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1975
    detail.hit.zdb_id: 2028560-7
    SSG: 11
    SSG: 13
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Late Weichselian Marine 14 C Reservoir Ages at the Western Coast of Norway
    Cambridge University Press (CUP) ; 1999
    In:  Quaternary Research Vol. 52, No. 1 ( 1999-07), p. 104-114
    Details
    In: Quaternary Research, Cambridge University Press (CUP), Vol. 52, No. 1 ( 1999-07), p. 104-114
    Abstract: A shallow marine Late Weichselian deposit on the outer coast of western Norway contains both terrestrial plant material and articulated marine shells. We have 14 C dated both types of material from eight different stratigraphic levels covering the time interval 12,300 to 11,100 14 C yr B.P. The difference between 14 C-dated terrestrial plant material and marine shell material (the marine reservoir age) ranges from 200 to 525 yr, with a weighted average of 380 ± 32 yr. This is almost identical to the present reservoir age of 379 ± 20 yr for southern Norway. In the mid-Younger Dryas (YD) interval the reservoir age in the North Atlantic (55°N–65°N) was 700–800 yr, considerably greater than the present reservoir age and the age we have measured for the Bølling–Allerød interval. The reason for this increase during the YD is probably a combination of reduced inflow of surface waters to the North Atlantic and more extensive sea-ice cover. Evidence from marine cores show that the southeastern Norwegian Sea experienced rapid fluctuations in the inflow of warm Atlantic surface water during the period 12,300 to 11,000 yr B.P. However, the reservoir age apparently did not increase during these colder periods (Older Dryas I and II). The reason is probably that, in contrast to the YD, these colder periods did not last long enough and/or were of too limited extent to alter the reservoir age of the ocean. A comparison of the obtained 14 C dates with the varve 14 C chronology from Lake Suigetsu indicates an age of 12,770 cal yr B.P. for the AL/YD boundary.
    Type of Medium: Online Resource
    ISSN: 0033-5894 , 1096-0287
    URL: Article
    DOI: 10.1006/qres.1999.2048
    RVK:
    RA 1000
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1999
    detail.hit.zdb_id: 1471589-2
    detail.hit.zdb_id: 205711-6
    SSG: 13
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    New Radiocarbon Dates for the Vedde Ash and the Saksunarvatn Ash from Western Norway
    Cambridge University Press (CUP) ; 1996
    In:  Quaternary Research Vol. 45, No. 2 ( 1996-03), p. 119-127
    Details
    In: Quaternary Research, Cambridge University Press (CUP), Vol. 45, No. 2 ( 1996-03), p. 119-127
    Abstract: The Vedde Ash Bed (mid-Younger Dryas) and the Saksunarvatn Ash (early Holocene) are important regional stratigraphic event markers in the North Atlantic, the Norwegian Sea, and the adjacent land area. It is thus essential to date them as precisely as possible. The occurrence of the Saksunarvatn Ash is reported for the first time from western Norway, and both tephras are dated precisely by AMS analyses of terrestrial plant material and lake sediment at Kråkenes. The Vedde Ash has been previously dated at sites in western Norway to about 10,600 yr B.P. It is obvious in the Younger Dryas sediments at Kråkenes, and its identity is confirmed geochemically. The mean of four AMS dates of samples of Salix herbacea leaves adjacent to the tephra is 10,310 ± 50 yr B.P. The Saksunarvatn Ash is not visible in the early Holocene lake sediment at Kråkenes. After removal of organic material and diatoms, the identity of the tephra particles was confirmed geochemically, and their stratigraphic concentration was estimated. From curve matching of a series of seven AMS dates of terrestrial plant macrofossils and whole sediment, the radiocarbon age of the ash is 8930–9060 yr B.P., corresponding to an age of 9930–10,010 cal yr B.P. (7980–8060 cal yr B.C.).
    Type of Medium: Online Resource
    ISSN: 0033-5894 , 1096-0287
    URL: Article
    DOI: 10.1006/qres.1996.0014
    RVK:
    RA 1000
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1996
    detail.hit.zdb_id: 1471589-2
    detail.hit.zdb_id: 205711-6
    SSG: 13
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Paleomagnetic correlations between Scandinavian Ice-Sheet fluctuations and Greenland Dansgaard–Oeschger events, 45,000–25,000 yr B.P.
    Cambridge University Press (CUP) ; 2003
    In:  Quaternary Research Vol. 59, No. 2 ( 2003-03), p. 213-222
    Details
    In: Quaternary Research, Cambridge University Press (CUP), Vol. 59, No. 2 ( 2003-03), p. 213-222
    Abstract: Two paleomagnetic excursions, the Skjong correlated with the Laschamp (about 41,000 GISP2 yr B.P.) and the Valderhaug correlated with the Mono Lake (about 34,000 GISP2 yr B.P.), have been identified in stratigraphic superposition in laminated clay deposited in ice-dammed lakes in three large caves in western Norway. During both periods the margin of the Scandinavian Ice Sheet advanced and reached the continental shelf beyond the outermost coastline. The mild, 4000-yr-long Ålesund interstade, when the coast and probably much of the hinterland were ice-free, separated the two glacial advances. The two paleomagnetic excursions have also been indirectly identified as increased fluxes of 36 Cl and 10 Be in the GRIP ice core, Greenland. This article presents a correlation between ice-margin fluctuations of the Scandinavian Ice Sheet and the stratigraphy of GRIP/GISP cores, using the paleomagnetic excursions and the 36 Cl and 10 Be peaks and thus circumventing the application of different dates or time scales. Some of the fluctuations of the Scandinavian Ice Sheet were of the “Allerød/Younger Dryas type” in the sense that its margin retreated during mild interstades on Greenland and readvanced during cold stades. However, some fluctuations were apparently not in phase with the Greenland climate.
    Type of Medium: Online Resource
    ISSN: 0033-5894 , 1096-0287
    URL: Article
    DOI: 10.1016/S0033-5894(03)00010-3
    RVK:
    RA 1000
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2003
    detail.hit.zdb_id: 1471589-2
    detail.hit.zdb_id: 205711-6
    SSG: 13
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Apparent Radiocarbon Ages of recent marine shells from Norway, Spitsbergen, and Arctic Canada
    Cambridge University Press (CUP) ; 1975
    In:  Quaternary Research Vol. 5, No. 2 ( 1975-06), p. 263-273
    Details
    In: Quaternary Research, Cambridge University Press (CUP), Vol. 5, No. 2 ( 1975-06), p. 263-273
    Abstract: The mean apparent radiocarbon ages of marine shells, colleted alive before the initiation of atomic bomb testing, and also before the main input of dead carbon derived from fossil fuels, are found to be 440 yr for the coast of Norway, 510 yr for Spitsbergen, and 750 yr for Ellesmere Island, Arctic Canada. The relationship between these apparent ages and the oceanic circulation pattern, is discussed. Also possible variations of the apparent ages back in time are discussed.
    Type of Medium: Online Resource
    ISSN: 0033-5894 , 1096-0287
    URL: Article
    DOI: 10.1016/0033-5894(75)90028-9
    RVK:
    RA 1000
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1975
    detail.hit.zdb_id: 1471589-2
    detail.hit.zdb_id: 205711-6
    SSG: 13
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Isotopic Fractionation of Norwegian Materials for Radiocarbon Dating
    Cambridge University Press (CUP) ; 1980
    In:  Radiocarbon Vol. 22, No. 3 ( 1980), p. 980-986
    Details
    In: Radiocarbon, Cambridge University Press (CUP), Vol. 22, No. 3 ( 1980), p. 980-986
    Abstract: To improve reporting of radiocarbon dates, Stuiver and Polach (1977) recommend that reported standard errors should include the error in the applied δ 13 C value, and suggest estimated mean values for δ 13 C to be applied when not measured. Based on δ 13 C data for ca 250 samples measured during 1975-1979, mean values for different materials dated by the Trondheim radiocarbon laboratory have been compiled. All material is from Norway and Svalbard (marine bone collagen). For peat, gyttja, and terrestrial bone material, δ 13 C should be measured to obtain optimal precision in the dates. For shell, wood, charcoal, and marine bones, the standard error in an estimated δ 13 C value will only increase uncertainty of a date from ±50 years to ca ±55 years.
    Type of Medium: Online Resource
    ISSN: 0033-8222 , 1945-5755
    URL: Article
    DOI: 10.1017/S0033822200010407
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1980
    detail.hit.zdb_id: 2028560-7
    SSG: 11
    SSG: 13
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    δ 13 C and Diet: Analysis of Norwegian Human Skeletons
    Cambridge University Press (CUP) ; 1986
    In:  Radiocarbon Vol. 28, No. 2A ( 1986), p. 754-761
    Details
    In: Radiocarbon, Cambridge University Press (CUP), Vol. 28, No. 2A ( 1986), p. 754-761
    Abstract: The relationship between 13 C content of human bone and the marine fraction in the individual diet is well established. In the present investigation human skeletons from inland and coastal areas in Norway were analyzed. Both regional and chronologic differences are revealed, and larger variability than expected at specific sites indicate more complex cultural adaptations than earlier recognized. Extremely high δ 13 C values, comparable with those obtained from Eskimo sites, are found for material from Early Stone Age fishing/hunting communities.
    Type of Medium: Online Resource
    ISSN: 0033-8222 , 1945-5755
    URL: Article
    DOI: 10.1017/S0033822200007992
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1986
    detail.hit.zdb_id: 2028560-7
    SSG: 11
    SSG: 13
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    Trondheim Natural Radiocarbon Measurements VI
    Cambridge University Press (CUP) ; 1972
    In:  Radiocarbon Vol. 14, No. 2 ( 1972), p. 418-451
    Details
    In: Radiocarbon, Cambridge University Press (CUP), Vol. 14, No. 2 ( 1972), p. 418-451
    Abstract: This date list covers most of the datings made during 1968 to 1970. Each sample is measured in one of the two counters described previously (R., 1970, v. 12, p. 205-237).
    Type of Medium: Online Resource
    ISSN: 0033-8222 , 1945-5755
    URL: Article
    DOI: 10.1017/S0033822200059476
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1972
    detail.hit.zdb_id: 2028560-7
    SSG: 11
    SSG: 13
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...