千山油松年轮宽度年表的建立及其与气候的关系

以千山油松为样本,建立了年轮宽度标准化年表、差值年表和自回归年表.结果表明,油松年轮宽度与5—7和9—11月温度指标的相关性较高,且与低温呈正相关,其中与7月的极端最低温、9月的平均最低温显著相关.3种年表与上年12月和当年1月的极端最低温、1月的平均最低温呈显著相关,且其与全年、上年12月、当年5月的降水量显著相关,与4月的降水量极显著相关.油松与水汽压、相对湿度的月和年指标均有较强的相关性.蒸发的年指标和绝大部分月指标对油松生长具有负效应,其中4—7月最明显.油松年表的窄化突变佐证了1800年以来的30次主要的旱灾年历史记录.千山油松的生长受全球或半球尺度气候变化的影响.年表与太阳活动存在显著的11、23和50年左右的公共周期,与地磁指标在10、20和45年左右存在共同的周期变化.

Chinese pine tree ring width chronology and its relations to climatic conditions in Qianshan Mountains

Taking Chinese pine in Qianshan Mountains as a sample,the tree ring width chronology including standard,residual,and Arstan chronologies was established.The results showed that the tree ring width of Chinese pine had a higher correlation with the temperature in May-July and in September-November,and significant positive correlations were observed between the tree ring width and the extreme minimum temperature in July and mean minimum temperature in September.The chronology had significant or very significant correlations with the extreme minimum temperature in December and next January,mean minimum temperature in January,annual precipitation,and the precipitation in April,May and last December.Chinese pine had stronger responses to the monthly/yearly water vapor pressure and relative humidity.The yearly and most monthly evaporation had negative effects on the growth,being most significant for the evaporation in April-July.The narrowed tree rings recorded by the chronology demonstrated the 30 times of extreme drought since 1 800.The growth of Chinese pine in Qianshan Mountains was also affected by the climate changes on global and hemisphere scales.There existed 11-,23-and 50-year-common periodicity between the chronology and solar activity,and 10-,20-and 45-year-common periodicity between the chronology and geomagnetic activity.