| 广东现代樟树树轮纤维素的碳同位素与厄尔尼诺事件的关系 |
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| 引用本文：孙艳荣,崔海亭,穆治国,刘鸿雁,李平日,刘玉琳,谭惠忠.2003.广东现代樟树树轮纤维素的碳同位素与厄尔尼诺事件的关系[J].地球学报,24(6):505-510. |
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| 基金项目:自然科学基金项目(编号:40071082) |
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| 中文摘要:本文对广东阳春河的樟树树轮纤维素△δ^13C序列研究发现，厄尔尼诺对树轮C同位素的高频变化的影响有一定的滞后性，一般是厄尔尼诺强度高峰期所对应年的下一年树轮△δ^13C值较低。通过谱分析发现，树轮记录的△δ^13C序列变化中2～3a周期与热带气候的“准两年振荡”(QBO)十分一致，这从另一个侧面说明了广东樟树树轮记录了大范围的ENSO信息。其中准4．57a周期可能与影响全球气候异常的厄尔尼诺事件的周期有关，很可能就是厄尔尼诺事件引起的气候变化对树木生长影响的反映。研究表明，广东厄尔尼诺所引起的气候变化，在树轮同位素中有较好的记录。说明在热湿地区，冬季树木仍有同位素分馏，树轮δ^13C依然能记录冬季气温和东亚冬季风强弱的变化。 |
| 中文关键词:树轮 δ13C 厄尔尼诺 广东 樟树 |
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| The δ13C Sequence of Cinnamomum Camphora Tree Ring α-cellulose in Yangchun County, Guangdong Province, and Its Relationship with the El Niño Event |
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| Abstract:The authors measured the tree ring α-cellulose δ 13C time series in Yangchun County, Guangdong Province. By spectrum analysis, the variation of tree-ring δ 13C sequence shows a quasi periodicity of 2～3 a ,which is coincident with “quasi two-year tropic barometric oscillation” (QBO)and demonstrates that the tree ring in Guangdong Province can record large-scale information of ENSO. Quasi periodicity of 4.57 a is correlated with the global standard periodicity of El Nio.The results indicate that the high-frequency oscillation of tree ring δ 13C sequence in this area is related to El Nio, temperature, rainfall and Asiatic monsoon. The climate change resulting from El Nio can be better recorded in isotopes of tree ring. In the warm and humid area the advantage of tree ring isotope lies in the fact that δ 13C can still record the effects of winter temperature and Asiatic monsoon. |
| keywords:tree ring δ13C El Niño Guangdong |
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