| 格陵兰冰芯氧同位素显示近千年气候变化的多尺度分析 |
| |
| 引用本文： | 俞鸣同,林振山,杜建丽,张真真.格陵兰冰芯氧同位素显示近千年气候变化的多尺度分析[J].冰川冻土,2009,31(6). |
| |
| 作者姓名： | 俞鸣同 林振山 杜建丽 张真真 |
| |
| 作者单位： | 1. 南京师范大学,地理科学学院,江苏,南京,210046;福建师范大学,地理科学学院,福建,福州,350007
2. 南京师范大学,地理科学学院,江苏,南京,210046 |
| |
| 基金项目： | 教育部高等学校博士学科点专项科研基金 |
| |
| 摘 要： | 用经验模态分解(EMD)方法对格陵兰冰盖GISP2冰芯古气候代用指标δ~ (18) O 序列进行分解, 结果表明: 格陵兰近10 ka来气候变化总趋势出现历时约490 a的中世纪暖期和历时约570 a的小冰期, 其间还存在次级的冷暖期变化;气候波动具有3 a、 6.5 a、 12 a、 24 a、 49 a、 96 a、 213 a、 468 a准周期, 既有NESO的因素, 也受制于太阳活动周期的影响. 第7, 第8内在模函数(IMF7, IMF8)波动振幅以及总体趋势分量res在1350A.D.出现明显的转型, 表明1350A.D.为中世纪暖期和小冰期的分界.
|
| 关 键 词： | 经验模态分解 中世纪暖期和小冰期 波动周期 |
Multi-Scale Analysis of the Last Millennium Climate Variations in Greenland Derived from Ice Core Oxygen Isotope |
| |
| YU Ming-tong,LIN Zhen-shan,DU Jian-li,ZHANG Zhen-zhen.Multi-Scale Analysis of the Last Millennium Climate Variations in Greenland Derived from Ice Core Oxygen Isotope[J].Journal of Glaciology and Geocryology,2009,31(6). |
| |
| Authors: | YU Ming-tong LIN Zhen-shan DU Jian-li ZHANG Zhen-zhen |
| |
| Institution: | YU Ming-tong1,2,LIN Zhen-shan1,DU Jian-li1,ZHANG Zhen-zhen1 (1. College of Geography Science,Nanjing Normal University,Nanjing Jiangsu 210046,China,2. College of Geography Sciences,Fujiang Normal University,Fuzhou Fujian 350007,China) |
| |
| Abstract: | The Empirical Mode Decomposition is used for analyzing the paleoclimate proxy δ~(18) O from Greenland GISP2 ice core. The results show that the trend of millennium climate change in Greenland emerges a Medieval Warm Period (WMP) lasting for about 490 years and a Little Ice Age (LIA) of about 570 years, during which there are also sub cooling-warming changes. Its multi-scale oscillations changed with quasi-periods of 3 a, 6.5 a, 12 a, 24 a, 49 a, 96 a, 213 a and 468 a, not only affected by ENSO but also by solar activities. The oscillation of intrinsic mode function IMF7, IMF8 and their tendency appear an obviously transforming in 1350 AD, which indicate that 1350 AD can be considered as the boundary between WMP and LIA. The results give more detailed changes and phases of millennium climate change in the high latitude areas of the Northern Hemisphere. |
| |
| Keywords: | Empirical Mode Decomposition medieval warm period and little ice age quasi-period of millennium climate oscillation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
