A 2917-year tree-ring-based reconstruction of precipitation for the Buerhanbuda Mts., Southeastern Qaidam Basin,China |
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| Institution: | 1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China;2. University of Chinese Academy of Sciences, Beijing, China;1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710075, China;2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China;1. Friedrich-Alexander-University Erlangen-Nürnberg, Institute of Geography, Wetterkreuz 15, D-91058 Erlangen, Germany;2. GFZ German Research Centre for Geoscience, Section 5.2 Climate Dynamics and Landscape Evolution, Telegrafenberg, D-14773 Potsdam, Germany;3. FZJ Research Centre Jülich, Institute of Bio- and Geosciences IBG-3, Wilhelm-Johnen-Straße, D-52428 Jülich, Germany;1. Key Laboratory of Ecohydrology in Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu Province, 730000, China;2. Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu Province, 730000, China;1. Department of Geology, University of Illinois at Urbana-Champaign, Champaign, IL, United States;2. Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States;3. USGS Global Environmental Change Science Center, Lakewood, CO, United States;4. Department of Geosciences, The University of Arizona, Tucson, AZ, United States;5. Department of Atmospheric Sciences, The University of Arizona, Tucson, AZ, United States;6. Institute of the Environment, The University of Arizona, Tucson, AZ, United States;7. Department of Oceanography and Coastal Sciences, Louisiana State University, Baton Rouge, LA, United States;8. Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;1. The State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China;2. Interdisciplinary Research Center of Earth Science Frontier (IRCESF) and Joint Center for Global Change Studies (JCGCS), Beijing Normal University, Beijing 100875, China;3. Open Studio for Oceanic-Continental Climate and Environment Changes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China |
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| Abstract: | In this study, we developed the tree-ring width chronology for the period of 1404 BCE to 2015 CE using Qilian juniper (Sabina przewalskii Kom.) trees collected from the Buerhanbuda Mts. in the southeastern Qaidam Basin (QB) near Nuomuhong Village, Qinghai Province. This is the first and longest chronology to date in this region. Based on the relationships between the tree-ring width chronology and climate data, the annual precipitation from previous July to current June (July-June) was reconstructed for the past 2917 years from 902 BCE to 2015 CE. This reconstruction accounted for 47.9% of the total variance in the actual July-June precipitation in the calibration period (1957–2015). The full reconstruction captured distinct wet and dry variability, and contained evidence of some low-frequency climate signals. We identified 13 wet and 12 dry periods, of which 1443–1503 CE and 1789–1836 CE were the two longest dry periods. General agreements in the low-frequency variations between the July-June precipitation and other moisture-sensitive records for the northeastern Tibetan Plateau (TP) suggested that the reconstruction in this study represented a regional signal. Spatial correlations with gridded precipitation data also indicated that the reconstructed July-June precipitation could adequately represent climate fluctuations over a large area of the northeastern TP. The new tree-ring width chronology and precipitation reconstruction are important for understanding natural climate change in the southeastern QB. |
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| Keywords: | Tree-ring Qaidam Basin Millennium Chronology Annual precipitation Climate change |
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