资源环境科技发展态势分析平台

Northeast China is one of the most vulnerable areas to climate change in high latitude regions of the Northern Hemisphere. The past temperature variations are critical to reveal the driving mechanism of climate change and to reduce the uncertainty in predicting future climates. Pre-instrument climatic variability is poorly understood, because of the scarcity of centuries-long climatic data. Here, we present a 211-year (1803-2013) growing season (May-July) temperature reconstruction based on tree-ring width chronology of Korean pine (Pinus koraiensis) from Zhangguangcai Mountains in Northeast China. The reconstruction accounted for 41.3% of the temperature variance during the calibration period from 1959 to 2013. The temperature reconstruction was similar to other nearby temperature reconstructions and correlated well spatially to gridded land and ocean surface temperature data. We identified four major cold periods (1839-1846, 1884-1901, 1906-1908 and 1941-1958) and three major warm periods (1855-1880, 1918-1932 and 1998-2013) in the past 211 years. The multi-taper method spectral analysis revealed significant cycles at 48.8, 11.5, 8.9, 3.9, 3.5 and 2-3 years, which might be associated with global climate oscillations and land-sea thermal contrasts, such as the sea surface temperatures, El Nino-Southern Oscillation, Atlantic Multidecadal Oscillation and solar activity.