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利用采自乌鲁木齐河源上树线跃进桥东采样点的雪岭云杉树轮样本,分析了其年表特征和气候响应特点.结果表明:采样点树轮早材密度标准化年表与和大西沟气象站7月份平均最高温度具有很好的正相关关系.用跃进桥东采样点的早材密度标准化年表序列,可较好地重建乌鲁木齐河源1623—2006年的7月平均最高温度,1959—2006年48a重建值对实测值的解释方差达42.4%,交叉检验表明重建结果是稳定可靠的.近384a来乌鲁木齐河源7月平均最高温度距平平均值为0.37℃.乌鲁木齐河源近384a的7月平均最高温度经历了5个偏暖阶段和4个偏冷阶段,与乌鲁木齐河源1号冰川的进退有一定的响应关系.近384a乌鲁木齐河源7月平均最高温度具有192a(99%)、29.3a(99%)6.8a(90%)、4.3a(90%)、4a(90%)、3.7a(90%)、2.3a(90%)、2.1a(95%)的周期变化.滑动T检验表明,乌鲁木齐河源近384a的7月平均最高温度在1645年,1665年,1726年,1807年,1833年,1855年,1878年,1929年和1954年发生了突变.
The characteristics of climatic features and climatic responses of snowy spruce tree were analyzed by using the sample of snowy spruce tree collected from the East Jinjiang River sampling point on the upper reaches of the Urumqi River source.The results show that: The average maximum temperature of July in the weather station has a good positive correlation.Using the normalized chronological sequence of early wood densities at the east sampling point of Yuejin Bridge can well reconstruct the July average maximum temperature in 1626-2006 in the Urumqi River source, The interpretation variance of 48a reconstruction value to the measured value in 2006 was 42.4%, and the cross-test showed that the reconstruction result was stable and reliable.The mean maximum temperature anomaly of July in Urumqi River source in the past 384 years was 0.37 ℃, July of the Urumqi River source nearly 384a The average maximum temperature experienced five warm-up periods and four cool-down periods, which had certain response to the advance and retreat of glaciers in the source bank of the Urumqi River source 1. The average July July maximum temperature of the Urumqi Heyuan source area was 192a (99%), 29.3a (90%), 2.3a (90%), 2.1a (95%) of 6.8a (90%), 4.3a (90%), 4a (90%), 3.7a It shows that the average July July maximum temperature of the Heyuan source of Urumqi during the recent 384 years was between 1645 and 1665, 1726, 1807, 1833, 1855, 1878, 1929 and 1954.