http://hdl.handle.net/10150/635053 Tue, 12 May 2026 19:12:39 GMT 2026-05-12T19:12:39Z http://hdl.handle.net/10150/654974 The Marine Radiocarbon Bomb Pulse across the Temperate North Atlantic: A Compilation of Δ14C Time Histories from Arctica islandica Growth Increments Scourse, James D.; Wanamaker, Alan D., Jr.; Weidman, Chris; Heinemeier, Jan; Reimer, Paula J.; Butler, Paul G.; Witbaard, Rob; Richardson, Christopher A. Marine radiocarbon bomb-pulse time histories of annually resolved archives from temperate regions have been underexploited. We present here series of Δ14C excess from known-age annual increments of the long-lived bivalve mollusk Arctica islandica from 4 sites across the coastal North Atlantic (German Bight, North Sea; Tromsø, north Norway; Siglufjordur, north Icelandic shelf; Grimsey, north Icelandic shelf) combined with published series from Georges Bank and Sable Bank (NW Atlantic) and the Oyster Ground (North Sea). The atmospheric bomb pulse is shown to be a step-function whose response in the marine environment is immediate but of smaller amplitude and which has a longer decay time as a result of the much larger marine carbon reservoir. Attenuation is determined by the regional hydrographic setting of the sites, vertical mixing, processes controlling the isotopic exchange of 14C at the air-sea boundary, 14C content of the freshwater flux, primary productivity, and the residence time of organic matter in the sediment mixed layer. The inventories form a sequence from high magnitude-early peak (German Bight) to low magnitude-late peak (Grimsey). All series show a rapid response to the increase in atmospheric Δ14C excess but a slow response to the subsequent decline resulting from the succession of rapid isotopic air-sea exchange followed by the more gradual isotopic equilibration in the mixed layer due to the variable marine carbon reservoir and incorporation of organic carbon from the sediment mixed layer. The data constitute calibration series for the use of the bomb pulse as a high-resolution dating tool in the marine environment and as a tracer of coastal ocean water masses. Fri, 17 Aug 2012 00:00:00 GMT http://hdl.handle.net/10150/654974 2012-08-17T00:00:00Z http://hdl.handle.net/10150/654971 The Dolmen Kolikho, Western Caucasus: Isotopic Investigation of Funeral Practice and Human Mobility Trifonov, V. A.; Zaitseva, G. I.; Van der Plicht, J.; Burova, N. D.; Bogomolov, E. S.; Sementsov, A. A.; Lokhova, O. V. We investigated the dolmen known as Kolikho (Black Sea coast, Russia), discovered accidentally in 2008. It is a unique, undisturbed megalithic structure. The burial chamber contains disarticulated human remains from about 70 individuals. Radiocarbon dating shows that the dolmen was in use between roughly the 19th to 13th centuries BC. Strontium isotopes are used to investigate the origin and last residence location of the people buried in the structure. Mon, 15 Oct 2012 00:00:00 GMT http://hdl.handle.net/10150/654971 2012-10-15T00:00:00Z http://hdl.handle.net/10150/654967 The Chronology of Tell el-Daba: A Crucial Meeting Point of 14C Dating, Archaeology, and Egyptology in the 2nd Millennium BC Kutschera, Walter; Bietak, Manfred; Wild, Eva Maria; Bronk Ramsey, Christopher; Dee, Michael; Golser, Robin; Kopetzky, Karin; Stadler, Peter; Steier, Peter; Thanheiser, Ursula; Weninger, Franz Radiocarbon dating at the Tell el-Daba site in the Nile Delta has created an enigma for many years. Despite great efforts, the difference of about 120 yr between the chronology based on 14C dates and the one based on archaeological evidence linked to the Egyptian historical chronology has not been solved. In order to foster open discussions on this discrepancy, we present here the results of 40 14C accelerator mass spectrometry (AMS) measurements on short-lived plant material assigned to 14 different phases of the Tell el-Daba excavation, spanning 600 yr (about 2000–1400 BC). On the one hand, the recently established agreement between 14C dates and dynastic Egypt (Bronk Ramsey et al. 2010) makes it unlikely that the problem lies in the 14C dates and/or the Egyptian historical chronology. On the other hand, the extensive archaeological evidence from Tell el-Daba linked to many different cultures in the eastern Mediterranean and to the Egyptian historical chronology provides strong evidence for an absolute chronology shifted by about 120 yr with respect to the 14C dates. Mon, 15 Oct 2012 00:00:00 GMT http://hdl.handle.net/10150/654967 2012-10-15T00:00:00Z http://hdl.handle.net/10150/654970 The Date of the Minoan Santorini Eruption: Quantifying the “Offset” Höflmayer, Felix Despite many recent attempts to settle the dispute concerning the absolute date of the Minoan Santorini eruption, there are still differences between some archaeologists and scientists on the absolute dates and the reliability of radiocarbon dating. The recent publication of over 200 new 14C dates for dynastic Egypt rules out a major flaw in the historical chronology of Egypt and proves the reliability of 14C dating in the Nile Valley. Therefore, the student of Aegean archaeology and eastern Mediterranean interconnections is still confronted with an archaeologically based conventional, or “low,” chronology and a 14C-backed “high” chronology. New 14C determinations from different sites of the Aegean support the high chronology for the Late Minoan (LM) IA, while recent re-evaluation of LM IB determinations are slightly higher but more or less in agreement with archaeological estimations. The present contribution reviews archaeological and scientific data for the LM IA period and argues that a reduced (~30 to 50 yr) offset between archaeological and 14C dates for the Minoan Santorini eruption may be possible, thus offering new perspectives for potential solutions for this problem. Mon, 15 Oct 2012 00:00:00 GMT http://hdl.handle.net/10150/654970 2012-10-15T00:00:00Z