作者简介:汪亮亮,硕士研究生通讯作者:叶茂,教授,博士;E-mail:yemao1111@163.com
本文借鉴树木年轮学方法,运用 LINTABTM6树木年轮测定仪读取胡杨样芯径向生长量,研究阿克苏河流域内胡杨年轮生长特点和周期性及径流变化关系。结果 表明:( 1)阿克苏河胡杨径向生长 1993年以前较为平稳,之后呈波动上升,胡杨的年轮指数变化与径向生长量的变化在时间尺度上具有一致性。( 2)胡杨年轮指数周期性震荡变化特征明显,在第一周期 19 a特征的时间尺度上,胡杨年轮指数变化平均周期为 12年左右,大约 2.5个周期胡杨年轮指数的升降变化;在第二周期 12 a时间特征尺度上,大约经历了 3.5个周期胡杨年轮指数的升降变化平均周期为 8 a左右;在第三周期 5 a年时间特征尺度上,大约经历了 3个周期胡杨年轮指数的升降变化。( 3)阿克苏河胡杨年轮生长与当年 3月时段径流量显著相关,该时段径流影响沿岸胡杨年轮生长,该要素对过去径流重建具有重要指导意义。
Tree-ring method, this paper, using LINTABTM6 tree-ring meter reads euphrates poplar sample core radial growth, Euphrates poplar growth rings in the Aksu river basin characteristics and periodicity and runoff change relations. Results show that:(1) The Aksu river Euphrates poplar radial growth relatively stable before 1993, after a rise by volatility, rings index change with the change of radial growth consistent on time scales; (2) Because the periodic oscillation rings index variation characteristics, in the first cycle 19 a characteristic time scales, populus euphratica tree ring index change average period of 12 years or so, approximately 2.5 cycles of P. euphratica tree-ring index changes; 12 a time in the second cycle characteristic scales, about 3.5 experienced a period of tree-ring index changes in average period of 8 years; 5 a year in the third cycle characteristic scale, roughly experienced three cycles of tree-ring index changes; (3) The Aksu river Euphrates poplar growth rings with 3 month period was significantly associated with runoff, runoff affect the growth of rings along the time, the key elements of runoff has important guiding significance to the reconstruction of past.