东天山庙尔沟冰芯δ^(18)O序列中ENSO信号的初步分析  

PRELIMINARY STUDY ON THE ENSO SIGNAL RECORDED BY THE δ^(18)O SERIES OF ICE CORE FROM MIAOERGOU FLAT-TOPPED GLACIER,EASTERN TIENSHAN

作　　者：张彦成[1] 侯书贵[1,2] 刘亚平[1] 庞洪喜[2] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室,兰州730000 [2]南京大学地理与海洋科学学院海岸与海岛开发教育部重点实验室,南京210093

出　　处：《第四纪研究》2012年第1期59-66,共8页Quaternary Sciences

基　　金：国家自然科学基金项目(批准号:40825017和41171052)资助

摘　　要：基于东天山庙尔沟冰芯1953～2004年的δ^(18)O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δ^(18)O序列与ENSO事件之间的关系。研究表明,庙尔沟冰芯δ^(18)O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δ^(18)O序列的影响与其对达索普冰芯及Sajama冰芯δ^(18)O序列的影响明显不同,说明ENSO事件对不同气候区冰芯δ^(18)O序列的影响机制可能存在差异。The upper 16. 83m section of a 57.5m ice core from the Miaoergou Glacier（43°03′N,94°19′E;4518m a. s. 1. ）, eastern Tienshan, provides a high-resolution δ^18O record during the period 1953 - 2004A. D. A possible linkage between this δ^18O series and ENSO is approached by making use of the instrumental observations of the meteorological stations nearby the ice core drilling site and the NCEP/NCAR reanalysis data. The annually δ^18O record of Miaoergou ice core is significantly negatively correlated with the sea surface temperature （SST） over the eastern tropical Pacific Ocean（ 170° -80°W）, and 500mb zonal wind of Westerlies over Asia from October of the same year to March of the next year, as well as the ENSO index from July to Deeember of the same year. It turns to be a warmer/cooler condition over the surrounding area of our ice core drilling site when El Nino/La Nina occurs. Moreover,a considerable disparity exists between the influence of ENSO on the δ^18O records of the Guliya, Malan and Miaoergou ice cores,and on the δ^18O records of the Dasuopu and Sajama ice cores.

关 键 词：东天山庙尔沟冰川 冰芯δ^18O序列 ENSO影响 统计相关 

分 类 号：P467[天文地球—大气科学及气象学] P532