Atmospheric C variations derived from tree rings during the early Younger Dryas |
| |
| Authors: | Quan Hua Mike Barbetti David Fink Klaus Felix Kaiser Michael Friedrich Bernd Kromer Vladimir A. Levchenko Ugo Zoppi Andrew M. Smith Fiona Bertuch |
| |
| Affiliation: | 1. Australian Nuclear Science and Technology Organisation, PMB1, Menai, NSW 2234, Australia;2. Radiogenic Isotope Laboratory, University of Queensland, Brisbane, QLD 4072, Australia;3. Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Z?rcherstrasse 111, 8903 Birmensdorf, Switzerland;4. Department of Geography, University of Z?rich-Irchel, Winterthurerstr. 190, 8057 Z?rich, Switzerland;5. Hohenheim University, Institute of Botany, Garbenstrasse 30, D-70593 Stuttgart, Germany;6. Heidelberger Akademie der Wissenschaften, Institut f?r Umweltphysik, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany;7. Accium BioSciences, Inc., 550 17th Avenue, Suite 550, Seattle, WA 98122, USA;1. U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, 600 Fourth Street South, Saint Petersburg, FL 33701, USA;2. Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, USA;3. Institute of Global and Environmental Change, Xi''an Jiaotong University, Xi''an 310049, China;4. Department of Statistics and Biostatistics, Rutgers University, 110 Frelinghuysen Rd., Piscataway, NJ 08854, USA;1. Department of Geography, Johannes Gutenberg University, 55099 Mainz, Germany;2. Department of Physical Geography, Stockholm University, 10691 Stockholm, Sweden;3. Navarino Environmental Observatory, Messinia, Greece;4. Department of History, Stockholm University, 10691 Stockholm, Sweden;5. Bolin Centre for Climate Research, Stockholm University, 10691 Stockholm, Sweden;6. Department of Geography, Justus-Liebig University, 35390 Giessen, Germany;7. Centre for International Development and Environmental Research, Justus Liebig University Giessen, 35390 Giessen, Germany;8. Università degli Studi di Padova, Dipartimento Territorio e Sistemi AgroForestali, 35020 Legnaro, Italy;9. Tree Ring Laboratory, Lamont-Doherty Earth Observatory, Palisades, NY 10964, USA;10. Department of Environmental Science, William Paterson University, Wayne, NJ 07470, USA;11. Institute of Forest SB RAS, Akademgorodok, Krasnoyarsk, 660036, Russia;12. Laboratory of Ecosystem Biogeochemistry, Siberian Federal University, Krasnoyarsk, 660041, Russia;13. Institute for the Humanities, Siberian Federal University, Krasnoyarsk, 660041, Russia;14. Natural Resources Institute Finland (Luke), Rovaniemi Unit, Rovaniemi, Finland;15. Swiss Federal Research Institute WSL, 8903 Birmensdorf, Switzerland;p. Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ 85721, USA;q. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, CONICET-Mendoza, 5500 Mendoza, Argentina;r. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;1. Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8564, Japan;2. Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;3. Faculty of International Resource Science, Akita University, 1-1 Tegata-Gakuenmachi, Akita-shi, Akita 010-8502, Japan;4. The University Museum, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;5. Institute of Geosciences, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan;6. Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan;7. Center for Advanced Marine Core Research, Kochi University, B200 Monobe, Nankoku, Kochi 783-8502, Japan;8. Research and Development Center for Global Change, Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan;9. Centre for Energy Geoscience, School of Earth and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia |
| |
| Abstract: | Atmospheric radiocarbon variations over the Younger Dryas interval, from  13,000 to 11,600 cal yr BP, are of immense scientific interest because they reveal crucial information about the linkages between climate, ocean circulation and the carbon cycle. However, no direct and reliable atmospheric 14C records based on tree rings for the entire Younger Dryas have been available. In this paper, we present (1) high-precision 14C measurements on the extension of absolute tree-ring chronology from 12,400 to 12,560 cal yr BP and (2) high-precision, high-resolution atmospheric 14C record derived from a 617-yr-long tree-ring chronology of Huon pine from Tasmania, Australia, spanning the early Younger Dryas. The new tree-ring 14C records bridge the current gap in European tree-ring radiocarbon chronologies during the early Younger Dryas, linking the floating Lateglacial Pine record to the absolute tree-ring timescale. A continuous and reliable atmospheric 14C record for the past 14,000 cal yr BP including the Younger Dryas is now available. The new records indicate that the abrupt rise in atmospheric Δ14C associated with the Younger Dryas onset occurs at 12,760 cal yr BP, 240 yrs later than that recorded in Cariaco varves, with a smaller magnitude of 40‰ followed by several centennial Δ14C variations of 20–25‰. Comparing the tree-ring Δ14C to marine-derived Δ14C and modelled Δ14C based on ice-core 10Be fluxes, we conclude that changes in ocean circulation were mainly responsible for the Younger Dryas onset, while a combination of changes in ocean circulation and 14C production rate were responsible for atmospheric Δ14C variations for the remainder of the Younger Dryas. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
