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东天山庙尔沟冰芯δ18O序列中ENSO信号的初步分析

Keywords: 东天山庙尔沟冰川,冰芯,δ18O序列,ENSO,影响,统计相关

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Abstract:

基于东天山庙尔沟冰芯1953~2004年的δ18O序列,利用冰芯钻取点附近的气象站观测资料、NCEP/NCAR再分析数据等资料,初步分析了庙尔沟冰芯δ18O序列与ENSO事件之间的关系。研究表明,庙尔沟冰芯δ18O年序列与当年10月至次年3月间的热带太平洋东部地区(约170°~80°W)海表温度、亚洲西风气流500mb纬向风速及当年7~12月的ENSO指数之间均存在显著负相关。另外,ENSO事件对古里雅冰芯、马兰冰芯及庙尔沟冰芯δ18O序列的影响与其对达索普冰芯及Sajama冰芯δ18O序列的影响明显不同,说明ENSO事件对不同气候区冰芯δ18O序列的影响机制可能存在差异。

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