Growing-season precipitation since 1872 in the coastal area of subtropical southeast China reconstructed from tree rings and its relationship with the East Asian summer monsoon system |
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| Institution: | 1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710061, China;2. Joint Center for Global Change Studies (JCGCS), Beijing 100875, China;3. School of Human Settlements and Civil Engineering, Xi''an Jiaotong University, Xi''an 710049, China;4. Research Institute of Humanity and Nature, 457-4 Motoyama, Kamigamo, Kita-ku, Kyoto 603-8047, Japan;5. Department of Geography, University of Wales Swansea, Swansea, SA2 8PP, UK;6. Environmental Science and Engineering Collage, Chang''an University, Xi''an 710054, China;7. Nature Reserve Administration of Xinglong Mountain, Lanzhou 730100, China;1. The State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710061, China;2. The University of the Chinese Academy of Science, Beijing 100049, China;3. Department of Environmental Science and Technology, School of Human Settlements and Civil Engineering, Xi''an Jiaotong University, Xi''an 710049, China;4. Joint Center for Global Change Studies (JCGCS), Beijing Normal University, Beijing 100875, China;1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710075, China;2. Department of Environmental Science and Technology, School of Human Settlements and Civil Engineering, Xi''an Jiaotong University, Xi''an 710049, China;3. University of Chinese Academy of Sciences, Beijing, China;1. School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China;2. Jiangsu Collaborative Innovation Center for Climate Change, Nanjing 210023, China;3. Department of Geography, University of Hong Kong, Pokfulam Road, Hong Kong, China;4. Department of Geology, University of Dayton, Dayton, OH, USA |
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| Abstract: | Tree rings from temperate zones of the world have provided abundant palaeo- ecological and paleo-hydroclimatic information. However, tree rings from subtropical to tropical regions remain relatively scarce, which greatly limit our fully understanding about the climate change issues. In the present work, tree-ring-width (TRW) measurements of Masson pine from Fujian province, the coastal area of subtropical southeast China were successfully crossdated and a TRW STD chronology was developed from 1854 to 2012. Significantly positive correlation was identified between the tree rings and April–November total precipitation (r = 0.71, p < 0.01). The reconstructed April–November precipitation exhibited two comparatively wet (1876–1886 and 1957–1962) and one comparatively dry (1986–2004) periods. An evident drying trend since 1959 was seen and it was mitigated after 1993. Most of the extreme low-precipitation years in the reconstruction were supported by the historical records. As revealed by the spatial correlation patterns, our precipitation reconstruction was also consistent with other hydroclimatic records along the coastal areas of southeast China, proving its ability to capture the large-scale hydrological signal in southeast China (mainly refers to the south of the middle-lower reaches of Yangtze River). The reconstructed precipitation showed significant correlation with the East Asian summer Monsoon (EASM) index. Moreover, it also indicated simultaneous variation with the monsoon precipitation in North China on a decadal scale, implying that growing season precipitation variations in both regions were influenced by the EASM strength. This work highlights the potential of using tree-ring width to reconstruct precipitation in subtropical southeast China, while the relevant issues about precipitation variation in this region is far from resolved. |
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| Keywords: | Subtropical southeast China Tree ring Growing season Precipitation reconstruction Spatial hydrological signal East Asian summer monsoon |
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