| 末次盛冰期南京降水记录中ENSO的演化 |
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| 引用本文： | 夏志锋,汪永进,吴江滢.末次盛冰期南京降水记录中ENSO的演化[J].南京师大学报,2006,29(1):106-110. |
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| 作者姓名： | 夏志锋 汪永进 吴江滢 |
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| 作者单位： | 南京师范大学地理科学学院,江苏,南京,210097;南京师范大学地理科学学院,江苏,南京,210097;南京师范大学地理科学学院,江苏,南京,210097 |
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| 基金项目： | 国家杰出青年科学基金;全国高等学校优秀博士学位论文作者专项基金 |
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| 摘 要： | 基于南京葫芦洞一支石笋TIMS-U系测年和纹层计数的交叉定年。获得丁末次盛冰期在24170～21222aBP时段石笋年纹层厚度的时间序列,主要反映了夏季风降水变率．小波分析揭示末次盛冰期连续3ka夏季风降水记录中厄尔尼诺一南方涛动（ENSO）周期和强度随时间的演化特征,该记录表明ENSO在末次盛冰期并非一直存在,有着高发期和平缓期。其爆发的频率和强度逐渐减弱。支持ENSO演化的“冰期阻尼效应”假说．
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| 关 键 词： | 末次盛冰期 石笋年纹层厚度 ENSO演化 小波分析 |
| 文章编号： | 1001-4616（2006）01-0106-05 |
| 收稿时间： | 2005-09-28 |
| 修稿时间： | 2005年9月28日 |
The Evolution of ENSO During LGM from Precipitation Record in Nanjing |
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| Xia Zhifeng,Wang Yongjin,Wu Jiangying.The Evolution of ENSO During LGM from Precipitation Record in Nanjing[J].Journal of Nanjing Normal University(Natural Science Edition),2006,29(1):106-110. |
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| Authors: | Xia Zhifeng Wang Yongjin Wu Jiangying |
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| Institution: | School of Geographical Science, Nanjing Normal University, Nanjing 210097, China |
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| Abstract: | A glacial stalagmite chronology from Nanjing has been established by the TIMS-U series dating and annual band counting methods.The annually layering sequence spanning 3000a from 24170 to 21222 calendar years before present(aBP) was analyzed for evidence of Asian summer monsoon precipitation variability during Last Glacial Maximum(LGM).Wavelet analysis reveals the variations in the frequency of occurrence and amplitude of El Nio-Southern Oscillation(ENSO) during LGM.We found 5 ENSO blasting times with statistical significance.Decreasing frequency of occurrence and amplitude of ENSO probable support "glacial dampening",hypothesis of ENSO's evolvement. |
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| Keywords: | last glacial maximum stalagmite annually lamina thickness ENSO variability wavelet analysis |
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