摘要
夏季亚洲-太平洋涛动指数(I APO)能够很好地指示中国东部季风区夏季降水变化。利用树轮宽度指数作为代用资料,结合气象资料分析表明油松径向生长与春、夏两季的气温和降水呈现明显的相关关系。在此基础上,利用树轮指数序列重建了近百年(1914—2006年)夏季I APO序列。重建结果表明,重建序列在低频信息1914—2006年间存在3个正位相阶段和4个负位相阶段,其中,1914—1948年间I APO整体趋势一直处在负位相;1948—1965年间I APO整体趋势一直处在正位相;60年代中期以来I APO基本处在负位相,仅在70年代中期、90年代左右出现短暂的正位相。对比分析表明,重建的夏季I APO序列与另一夏季I APO重建序列具有良好的同步性。
Summer Asian-Pacific Oscillation Index (IAPO) is a good indicator of summer monsoon precipitation variations in east China.With the tree-ring width index as proxy data,significant correlation is found between the radial growth of Pinus tabulaeformis and the meteorological data (temperature and precipitation) in spring and summer.On this basis,the summer IAPO sequence in the past hundred years (1914-2006) is reconstructed by using tree-ring index sequence.The results show that there are three positive phase stages and four negative phase stages in the low-frequency information of reconstruction sequence.Except for transitory positive phase in mid-1970s and around 1990s,the overall trend of IAPO is negative phase from 1914 to 1948,positive phase from 1948 to 1965,and generally negative phase since the mid-1960s.Comparative analysis shows that the reconstructed summer IAPO sequence is well synchronic with another summerIAPO reconstruction sequence.
出处
《长江科学院院报》
CSCD
北大核心
2013年第11期11-15,19,共6页
Journal of Changjiang River Scientific Research Institute
基金
国家重点基础研究发展计划(973)资助项目(2010CB951102)
科技部科技基础性工作专项资助项目(2009FY220200)