Early-summer temperature variations over the past 563 yr inferred from tree rings in the Shaluli Mountains,southeastern Tibet Plateau |
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| Institution: | 1. MOE Key Laboratory of Western China’s Environmental Systems, Collaborative Innovation Centre for Arid Environments and Climate Change, Lanzhou University, Lanzhou 73000, China;2. State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;1. Department of Vegetation Ecology, Institute of Botany, Academy of Sciences of the Czech Republic, Lidická 25/27, CZ-602 00 Brno, Czech Republic;2. Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlá?ská 2, CZ-61137 Brno, Czech Republic;1. The Fredy and Nadine Herrmann Institute of Earth Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus Givat Ram, Jerusalem 91904, Israel;2. CEREGE, UMR 6635 CNRS-Aix-Marseille University, BP 80, 13 545 Aix en Provence Cedex 4, France;3. Geological Survey of Israel, 30 Malkhe Israel St., Jerusalem 95501, Israel;4. Department of Geography, The Hebrew University of Jerusalem, Mt. Scopus, Jerusalem 91905, Israel;5. Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, CA 94511, USA;1. Paleoecological Environmental Assessment and Research Laboratory (PEARL), Department of Biology, Queen''s University, Kingston, Ontario K7L3N6, Canada;2. Department of Biology, University of Regina, Laboratory Building, Saskatchewan S4S0A2, Canada;1. Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR), Avenida de las Palmeras 4, 18100 Armilla, Granada, Spain;2. Departamento de Mineralogia y Petrologia (UGR), Facultad de Ciencias, Campus Fuentenueva, 18002 Granada, Spain;3. NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Organic Biogeochemistry, PO Box 59, AB Den Burg, 1790 Texel, The Netherlands;4. MARUM—Center for Marine Environmental Sciences, University of Bremen, P.O. Box 330440, 28334 Bremen, Germany |
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| Abstract: | We developed a tree-ring chronology (AD 1446–2008) based on 75 cores from 37 Abies squamata Mast. trees from the Shaluli Mountains, southeastern Tibet Plateau, China, using signal-free methods, which are ideally suited to remove or reduce the distortion introduced during traditional standardization. This chronology correlates best with regional temperatures in June–July, which allowed us to develop a June–July temperature reconstruction that explained 51.2% of the variance in the instrumental record. The reconstruction showed seven cold periods and five warm periods. Cold periods were identified from AD 1472 to 1524, 1599 to 1653, 1661 to 1715, 1732 to 1828, 1837 to 1847, 1865 to 1876 and 1907 to 1926. Warm intervals occurred from AD 1446 to 1471, 1525 to 1598, 1716 to 1731, 1848 to 1864, 1877 to 1906 and 1927 to present. The reconstruction agrees well with nearby tree-ring-based temperature reconstructions. Spatial correlation analyses suggest that our reconstructions provide information on June–July temperature variability for the southeastern Tibetan Plateau and its vicinity. Spectral analyses revealed significant peaks at 2–6, 10.7, 51.2, 102.2 and 204.8 yr. The temperature variability in this area may be affected by ENSO, the Pacific Decadal Oscillation and solar activity. |
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