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Datasets of project "Climate in Historical Times"

Mostrando recursos 1 - 20 de 112

  1. Coral oxygen isotope and Sr/Ca data from the Northern Gulf of Aqaba (Red Sea)

    Felis, Thomas; Lohmann, Gerrit; Kuhnert, Henning; Lorenz, Stefan J; Scholz, Denis; Pätzold, Jürgen; Al-Rousan, Saber; Al-Moghrabi, Salim M
    The last interglacial period (about 125,000 years ago) is thought to have been at least as warm as the present climate (Kukla et al., 2002, doi:10.1006/qres.2001.2316). Owing to changes in the Earth's orbit around the Sun, it is thought that insolation in the Northern Hemisphere varied more strongly than today on seasonal timescales (Berger, 1987, doi:10.1175/1520-0469(1978)035<2362:LTVODI>2.0.CO;2), which would have led to corresponding changes in the seasonal temperature cycle (Montoya et al., 2000, doi:10.1175/1520-0442(2000)013<1057:CSFKBW>2.0.CO;2). Here we present seasonally resolved proxy records using corals from the northernmost Red Sea, which record climate during the last interglacial period, the late Holocene epoch and...

  2. Age determination of lake Holzmar sediments

    Zolitschka, Bernd; Brauer, Achim; Stockhausen, Hagen; Lang, Andreas; Negendank, Jörg F W
    A record extending back to 23 220 calendar yr B.P. was obtained from varved sediments from Lake Holzmaar, Germany, by applying multiple dating methods and interlake comparison with Meerfelder Maar. Variations in the Weichselian inorganic carbon content resulting from intensified eolian activities coincide with proxy parameters of dust accumulation in Greenland. The timing for the end of the last glacial maximum at Holzmaar agrees with the Greenland Ice Sheet Project (GISP2) data but suggests dating discrepancies with the Greenland Ice Core Project data (GRIP). Assuming that periods of maximum dust deposition in the Eifel and Greenland coincide with ice advances...

  3. Sulfate and nitrate firn concentrations on the Greenland ice sheet

    Fischer, Hubertus; Wagenbach, Dietmar; Kipfstuhl, Sepp
    Intercomparison of three new chemical ice core records from northern Greenland (covering the time span from approximately 1500 A.D. to present) with previously published records for southern and central Greenland reveals a uniform timing of anthropogenic changes in sulfate and nitrate firn concentrations over the entire ice sheet. The anthropogenic sulfate increase started around 1890, was interrupted by a transient decrease in the 1930s, and has resumed a major increase since 1950. Since the late 1970s though, a significant 30% decline in Greenland sulfate firn levels can be documented. The maximum anthropogenic increase in northern Greenland sulfate firn concentrations (up...

  4. Sulfate and nitrate firn concentrations on the Greenland ice sheet

    Fischer, Hubertus; Wagenbach, Dietmar; Kipfstuhl, Sepp
    Intercomparison of three new chemical ice core records from northern Greenland (covering the time span from approximately 1500 A.D. to present) with previously published records for southern and central Greenland reveals a uniform timing of anthropogenic changes in sulfate and nitrate firn concentrations over the entire ice sheet. The anthropogenic sulfate increase started around 1890, was interrupted by a transient decrease in the 1930s, and has resumed a major increase since 1950. Since the late 1970s though, a significant 30% decline in Greenland sulfate firn levels can be documented. The maximum anthropogenic increase in northern Greenland sulfate firn concentrations (up...

  5. Accumulation rate and stable oxygen isotope ratios of ice core ngt03C93.2 from the North Greenland Traverse

    Miller, Heinz; Schwager, Matthias

  6. Coral oxygen isotope and Sr/Ca data from the Northern Gulf of Aqaba (modern), sample EILAT-15B

    Felis, Thomas; Lohmann, Gerrit; Kuhnert, Henning; Lorenz, Stefan J; Scholz, Denis; Pätzold, Jürgen; Al-Rousan, Saber; Al-Moghrabi, Salim M

  7. Coral oxygen isotope and Sr/Ca data from the Northern Gulf of Aqaba (last interglacial), sample AQB-3-A

    Felis, Thomas; Lohmann, Gerrit; Kuhnert, Henning; Lorenz, Stefan J; Scholz, Denis; Pätzold, Jürgen; Al-Rousan, Saber; Al-Moghrabi, Salim M

  8. Coral oxygen isotope and Sr/Ca data from the Northern Gulf of Aqaba (late Holocene), sample AQB-10-B

    Felis, Thomas; Lohmann, Gerrit; Kuhnert, Henning; Lorenz, Stefan J; Scholz, Denis; Pätzold, Jürgen; Al-Rousan, Saber; Al-Moghrabi, Salim M

  9. Coral oxygen isotope and Sr/Ca data from the Northern Gulf of Aqaba (modern), sample EILAT-1

    Felis, Thomas; Lohmann, Gerrit; Kuhnert, Henning; Lorenz, Stefan J; Scholz, Denis; Pätzold, Jürgen; Al-Rousan, Saber; Al-Moghrabi, Salim M

  10. Coral oxygen isotope and Sr/Ca data from the Northern Gulf of Aqaba (modern), sample AQ2

    Felis, Thomas; Lohmann, Gerrit; Kuhnert, Henning; Lorenz, Stefan J; Scholz, Denis; Pätzold, Jürgen; Al-Rousan, Saber; Al-Moghrabi, Salim M

  11. Stable oxygen isotopes on snow pit ngt18C93 from the North Greenland Traverse

    Fischer, Hubertus

  12. Stable oxygen isotopes on snow pit ngt18C93 from the North Greenland Traverse

    Fischer, Hubertus

  13. Stable oxygen isotopes on snow pit ngt12C93 from the North Greenland Traverse

    Fischer, Hubertus

  14. Stable oxygen isotopes on snow pit ngt12C93 from the North Greenland Traverse

    Fischer, Hubertus

  15. Stable oxygen isotopes on snow pit ngt05C93 from the North Greenland Traverse

    Fischer, Hubertus

  16. Stable oxygen isotopes on snow pit ngt05C93 from the North Greenland Traverse

    Fischer, Hubertus

  17. Stable oxygen isotopes on snow pit ngt01C93 from the North Greenland Traverse

    Fischer, Hubertus

  18. Stable oxygen isotopes on snow pit ngt01C93 from the North Greenland Traverse

    Fischer, Hubertus

  19. Chemistry on snow pit ngt12C93 from the North Greenland Traverse

    Fischer, Hubertus

  20. Chemistry on snow pit ngt12C93 from the North Greenland Traverse

    Fischer, Hubertus

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