Radiocarbon, Volume 42, Number 3 (2000) Item Type Journal; text Publisher Department of Geosciences, The University of Arizona Journal Radiocarbon Rights Copyright © by the Arizona Board of Regents on behalf of the University of Arizona. All rights reserved. Download date 09/10/2021 09:46:29 Item License http://rightsstatements.org/vocab/InC/1.0/ Version Final published version Link to Item http://hdl.handle.net/10150/655374 Radiocarbon An International Journal of Cosmogenic Isotope Research VOLUME 42 / NUMBER 3 / 2000 Guest Editor J VAN DER PLICHT Editor A J T JULL Associate Editors J WARREN BECK GEORGE S BURR Managing Editor KIMBERLEY TANNER ELLIOTT Department of Geosciences The University of Arizona 4717 East Fort Lowell Road Tucson, Arizona 85712-1201 USA ISSN: 0033-8222 RADIOCARBON An International Journal of Cosmogenic Isotope Research Editor: A J T JULL Associate Editors: J WARREN BECK and GEORGE S BURR Managing Editor: KIMBERLEY TANNER ELLIOTT Interns: JACKIE LIND and MARGARET BURNETT Published by Department of Geosciences The University of Arizona Published three times a year at The University of Arizona, Tucson, AZ 85712-1201 USA. © 2000 by the Arizona Board of Regents on behalf of the University of Arizona. All rights reserved. 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Vol 42, Nr 3 Radiocarbon 2000 CONTENTS INTRODUCTION Johannes van der Plicht . 313 ARTICLES Varve Chronologies AMS Radiocarbon Measurements from the Swedish Varved Clays Barbara Wohlfarth, Göran Possnert . 323 Radiocarbon Calibration by Means of Varves Versus 14C Ages of Terrestrial Macrofossils from Lake Go ci¹¿ and Lake Perespilno, Poland Tomasz Goslar, Maurice Arnold, Nadine Tisnerat-Laborde, Christine Hatte, Martine Paterne, Magdalena Ralska-Jasiewiczowa . 335 Radiocarbon Dating of Varve Chronologies: Soppensee and Holzmaar after Ten Years Irka Hajdas, Georges Bonani, Bernd Zolitschka . 349 AMS Radiocarbon and Varve Chronology from the Annually Laminated Sediment Record of Lake Meerfelder Maar, Germany Achim Brauer, Christoph Endres, Bernd Zolitschka, Jörg FW Negendank . 355 Atmospheric Radiocarbon Calibration Beyond 11,900 cal BP from Lake Suigetsu Laminated Sediments Hiroyuki Kitagawa, Johannes van der Plicht . 370 Comparison Records Last Ice Age Millennial Scale Climate Changes Recorded in Huon Peninsula Corals Yusuke Yokoyama, Tezer M Esat, Kurt Lambeck, L Keith Fifield . 383 Comparison of U-Series and Radiocarbon Dates of Speleothems Tomasz Goslar, Helena Hercman, Anna Pazdur. 403 Radiocarbon Calibration Beyond the Dendrochronology Range Mordechai Stein, Steven L Goldstein, Alexandra Schramm . 415 Subfossil Tree Deposits in the Middle Durance (Southern Alps, France): Environmental Changes from Allerød to Atlantic C Miramont, O Sivan, T Rosique, JL Edouard, M Jorda . 423 Radiocarbon Levels in the Iceland Sea from 25–53 kyr and their Link to the Earth’s Magnetic Field Intensity Antje H L Voelker, Pieter M Grootes, Marie-Josee Nadeau, Michael Sarnthein . 437 RADIOCARBON UPDATES . 453 LIST OF LABORATORIES . 455 AUTHOR INDEX . 479 SUBJECT INDEX . 481 i EDITORIAL BOARD EDOUARD BARD Aix-en-Provence, France CHRISTOPHER BRONK RAMSEY Oxford, England OWEN K DAVIS Tucson, Arizona, USA ELLEN R M DRUFFEL Irvine, California, USA PIETER GROOTES Kiel, Germany YAROSLAV KUZMIN Vladivostok, Russia STEVEN W LEAVITT Tucson, Arizona, USA TOSHIO NAKAMURA Nagoya, Japan ANN P McNICHOL Woods Hole, Massachusetts, USA PAVEL POVINEC Bratislava, Slovakia Monaco MICHAEL B SCHIFFER Tucson, Arizona, USA E MARIAN SCOTT Glasgow, Scotland RODGER SPARKS Lower Hutt, New Zealand JOHANNES VAN DER PLICHT Groningen, The Netherlands JOHN S VOGEL Livermore, California, USA WEIJIAN ZHOU Xi’an, China ii RADIOCARBON, Vol 42, Nr 3, 2000, p 313–322 © 2000 by the Arizona Board of Regents on behalf of the University of Arizona INTRODUCTION THE 2000 RADIOCARBON VARVE/COMPARISON ISSUE Johannes van der Plicht, guest editor Centre for Isotope Research, Radiocarbon Laboratory, Groningen University, Nijenborgh 4, 9747 AG Groningen, the Netherlands. Email: [email protected]. For radiocarbon calibration, the arrow of time is pointing backwards but the entropy does not necessarily decrease in this direction… At the 16th International Radiocarbon Conference in Groningen, June 1997, it was decided to pub- lish the 3rd calibration issue (Stuiver and van der Plicht, editors 1998). Upon amending and extend- ing previous calibration issues (Stuiver and Kra 1986; Stuiver et al. 1993), a new and recommended calibration curve INTCAL98 has been constructed (Stuiver et al. 1998). Calibration is the conversion of radiocarbon ages (BP) into historical ages (cal BC, cal AD, or cal BP). The 14C content of the atmosphere is not a natural constant throughout the ages, but depends on factors such as geomagnetic field intensity and solar fluctuations (directly influencing the cosmic ray flux and thus the 14C production rate in the atmosphere), and carbon reservoir reorganizations 14 (mainly CO2 exchange ocean/atmosphere) (Bard 1998). Past atmospheric C fluctuations