中文摘要：

根据采自青海南部高原杂多地区树木年轮样本,建立了该地717年树木年轮年表序列。依据响应函数、相关与偏相关方法,分析了该年表与树木生长时温度和湿度的关系。结果表明：该年表对杂多5～6月的气温、蒸发、降水量、相对湿度和干燥度指数反映敏感,由其重建了高原春末夏初的干燥度指数序列,并应用交叉检验方法对校准方程进行了检验,证明重建方程稳定,所重建的旱涝变化比较可靠,具有一定的区域代表性。通过对重建序列的进一步分析得出,重建序列在一定程度上反映了青海南部高原春末夏初干燥度指数大小的历史变化。1360年以来在年代际尺度上,持续时间较长的干旱时段有4个,即1441—1450年、1691—1700年、1741—1750年和1871—1880年;持续时间较长的湿润时段有5个,即1361—1370年、1561—1570年、1761—1770年、1831—1850年和1891—1910年。

英文摘要：

The tree rings standardized chronology （TRSC） series of 717 years was established based on the tree-ring-width data of Sabina Tibetica in Zaduo of Qinghai Province. The correlations between the TRSC and simultaneously temperature and humidity were analyzed using the response function, linear correlation and partial correlation methods. It is found that the TRSC responses to surface air temperature, evaporation, precipitation, relative humidity and drought index in the time of May to June is sensitive, so a drought index series （DIS） during the late spring and early summer （May～June） in Zaduo area were reconstructed, and the confidence and area representative of function was tested by cross check method. Furthermore, it indicated the DIS closely corresponds to long term nature change of drought index during the late spring and early summer in the south of Qinghai Province. There are 4 long dry periods of duration on the interdecadal scales since 1360, 1441-1450, 1691-1700, 1741-1750 and 1871-1880 years and the wet are in 1361-1370, 1561-1570, 1761-1770, 1831-1850 and 1891-1910 years, respectively.