| 近2ka古里雅冰芯记录的温湿配置多尺度特征 |
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| 引用本文： | 戴新刚,尤莉,汪萍,封国林. 近2ka古里雅冰芯记录的温湿配置多尺度特征[J]. 气候变化研究进展, 2007, 3(3): 167-171 |
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| 作者姓名： | 戴新刚 尤莉 汪萍 封国林 |
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| 作者单位： | 中国科学院,大气物理研究所,东亚区域气候-环境重点实验室,北京,100029;中国气象局,国家气候中心,中国气象局气候研究开放实验室,北京,100081;内蒙古气象局,呼和浩特,010051;中国科学院,大气物理研究所,东亚区域气候-环境重点实验室,北京,100029;中国气象局,国家气候中心,中国气象局气候研究开放实验室,北京,100081 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);中国科学院知识创新工程项目;中国气象局气候变化专项基金 |
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| 摘 要： | 采用正交小波分解研究了近2 ka来青藏高原古里雅冰芯记录的气温和冰川积累量演变多尺度特征，得到了与构成序列中主要气候事件对应的尺度分量。用130 a尺度以上分量几乎可以重建冰芯记录中的主要冷暖或干湿气候事件。平均而言，温度和冰川积累量配置在大多数时间尺度上都呈正相关，即暖湿/冷干配置，但在130 a尺度上是负相关，即冷湿/暖干配置。20世纪以来的快速增暖增湿发生在260 a尺度上。线性增暖趋势和千年尺度分量都是暖湿/冷干配置并占有较大的方差，它们在很大程度上左右着百年尺度上的温湿配置。二者的结合直接导致千年尺度上温湿配置在8世纪出现由冷湿/暖干向暖湿/冷干气候型的转变。
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| 关 键 词： | 古里雅冰芯 正交小波分解 温度和冰川积累量 配置 多时间尺度 非平稳性 |
| 文章编号： | 1673-1719（2007）03-0167-05 |
| 收稿时间： | 2006-08-28 |
| 修稿时间： | 2006-08-282007-01-05 |
Multi-Scale Characteristics and Unsteadiness of Reconstructed Temperature and Ice Accumulation Records in Guliya Ice Core |
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| Dai Xingang,You Li,Wang Ping,Feng Guolin. Multi-Scale Characteristics and Unsteadiness of Reconstructed Temperature and Ice Accumulation Records in Guliya Ice Core[J]. Progressus Inquisitiones DE, 2007, 3(3): 167-171 |
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| Authors: | Dai Xingang You Li Wang Ping Feng Guolin |
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| Affiliation: | 1. Key Laboratory of Regional Climate-Environment Research for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; 2. Laboratory for Climate Studies, China Meteorological Administration, Beijing 100081, China; 3. Meteorological Bureau of Inner Mongolia, Hohhot 010051, China |
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| Abstract: | The multi-scale characteristics of the reconstructed temperature and glacier ice accumulation from Guliya ice core on the Tibetan Plateau are studied by orthogonal wavelet decomposition.The main characteristics of the two sequences can be almost totally reproduced by the components with the scales longer than 100 years,and the well- known climate events in the records can be fitted well by only one or several decomposed components.In addition, the records also show some unsteady properties of their components,by which a number of transient climate events can be interpreted well.Meanwhile the unsteadiness also exists in their collocation evolution although their correlation coefficients are almost positive except for the one at scale 130 years.Besides,the linear trend of temperature and millennia-scale components of the two sequences dominated their collocation evolution during 301-1990 AD. |
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| Keywords: | Guliya ice core orthogonal wavelets temperature and ice accumulation collocation,multi-scalc characteristics unsteadiness |
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