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Growth–climate response and drought reconstruction from tree-ring of mongolian pine in Hulunbuir,Northeast China

Journal of Plant Ecology 2016年第1期9卷 51-60页

作者： Zhongjie Shi Lihong Xu Linshui Dong Jixi Gao Xiaohui Yang Shihai Lü Chaoyang Feng Aiyun Song Hao Guo Xiao Zhang Institute of Desertification Studies Chinese Academy of Forestry10 Huaishuju RoadBeijing 100091China Institute of Forest Ecology Environment and ProtectionChinese Academy of Forestry1 DongxiaofuXiangshan RoadBeijing 100091China Key Laboratory of Eco-environmental Science for Yellow River Delta of Shandong Province Binzhou University391 Huanghewu RoadBinzhou 256603China Nanjing Institute of Environmental Sciences Ministry of Environmental Protection8 Jiangwangmiao StreetNanjing 2100422China Chinese Research Academy of Environmental Sciences 8 DayangfangBeiyuan RoadBeijing 100012China

Aims Drought affected by atmosphere–ocean cycle is a dominant factor influencing tree radial growth of sandy mongolian pine(Pinus sylvestris ***)and regional vegetation dynamics in Hulunbuir,***,historical droughts and its correlations with tree radial growth and atmosphere–ocean cycle in this area have been little *** We developed tree-ring chronologies of mongolian pine from Hulunbuir,Inner Mongolia,China and analyzed the correlations between tree-ring width index,the normalized difference vegetation index and Palmer drought severity index(PDSI),then developed a linear model to reconstruct the drought variability from 1829 to ***-term trends and its linkages with atmosphere–ocean cycle were performed by the power spectral,wavelet and teleconnection *** Findings The local moisture variations affected largely the regional vegetation dynamics and tree-ring growth of Mongolia pine in the forest–grassland *** tree-ring width chronology of mongolian pine,the reconstruction explains 49.2%of PDSI variance during their common data period(1951–2005).The reconstruction gives a broad-scale regional representation of PDSI in the Hulunbuir area,with drought occurrences in the 1850s,1900s,1920s,mid-1930s and at the turn of the 21st *** with other treering drought reconstructions and historical records reveal some common drought periods and drying trends in recent decades at the northern margin zones of the East Asian summer monsoon(EASM).The drying trends in these zones occurred earlier than weakening of the EASM.A REDFIT spectral analysis shows significant peaks at 7.2,3.9,2.7–2.8,2.4 and 2.2 years with a 0.05 significance level,and 36.9,18.1 and 5.0 years with 0.1 significance *** analysis also shows similar *** variations in the study area significantly correlated with sea surface temperatures in the western tropical Pacific Ocean and middle and northern Indian Ocean,and the

关键词： tree-rings dendroclimatology mongolian pine drought PDSI SSTs East Asian summer monsoon(EASM) Hulunbuir China

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