呼图壁河流域树轮年表的建立及其特征分析

通过对呼图壁河流域地区6个标准化树轮年表统计参数的分析，发现喀音萨依树轮年表较其它年表可能包含了更多的气候信息，质量较好，而冰沟年表与其他年表的相关性最好，代表性强。在0．05的显著性水平上，冰沟年表树轮指数变化具有明显的具有63．3a，53．3a，31．8a，28．9a，3．7—3．0a和2．03—2．1a的变化准周期。以希勒木布尔克为代表的高海拔采点的年表的高频信息含量较高，而其低频信息含量则是以喀音萨依为代表的低海拔采点的信息含量较高。对年轮指数的观察发现20世纪以来指数在高水平上下波动，从一定程度上佐证了新疆天山山区近40a，特别是近10多年来向湿润发展的大趋势。

Development of the Tree-ring Chronology and Its Characteristic Analysis in Hutubi River Basin

This paper analyzed some parameters of the six standardized chronologies of Hutubi River Basin, the results indicated that Kayinsayi chronology contained more climatic information than the others and had better quality; and the correlation of Binggou standardized chronology with the other chronologies was best, and its representativeness was fine. In α=0.05 significant level, the tree-ring width index of Binggou standardized chronology existed the quasi-periodic changes of 63.3a, 53.3a, 31.8a, 28.9a, 3.7-3.0a and 2.03-2.1a obviously. The Xilemubuerke chronology from the high- altitude sampling point as the representative contained more high-frequency information, and The Kayinsayi chronology from the low-altitude sampling point as the representative contained more low-frequency information. We found that the tree-ring width index was changed on high level since the 20th century. It was confirmed, in a certain extent, the general trend to be humidifying in Tianshan Mountain area in Xinjiang for the recent 40 years, especially in the last 10 years.