| 重建古气温的环境证据-方法差异性分析 |
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| 关键词:reconstruction ancient temperature circumstantial evidence method |
| 基金项目:青海师范大学科技创新项目(编号: 10YJCZH041) |
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| 摘要: |
| The Sensitivity Analysis of Reconstructing Ancient Temperatures by Different Circumstantial Evidence and Methods |
| The reconstruction of ancient temperatures is one of the focuses to which PAGES pays close attention. Due to the difference between the type of circumstantial evidence and the method for reconstructing ancient temperatures, there exists certain differences between the records of reconstructing ancient temperatures. The temperatures from such types of circumstantial evidence as spore and pollen, phytolith, comprehensive evidence, oxygen isotope and glacier-periglacial decrease in turn at the same time and spot. The temperatures indicated by spore and pollen and phytolith are closest to each other, and those indicated by comprehensive evidence and oxygen isotope are relatively close to each other. These data suggest that the temperature numerical value reconstructed by spore and pollen is relatively high, and that of the evidence of glacier-periglacial is relatively low, which might mainly indicate the temperature of growing season of plants and that of half year of winter (cold period) respectively; by contrast, the comprehensive evidence and oxygen isotope temperature may be close to the actual temperature. According to the reconstruction method, the Holocene temperature record reconstructed by transfer function analysis is generally higher than that by the natural geographical factor indication method, while the variation range of the temperature record reconstructed by the natural geographical factor indication method is wider (especially the cold events), suggesting that the temperature record reconstructed by the factor indication method is more sensitive to the extreme event at the scale of one hundred years. |
| HOU Guang-liang,E Chong-yi,XIAO Jing-yi,HE Qing-mei.2011.The Sensitivity Analysis of Reconstructing Ancient Temperatures by Different Circumstantial Evidence and Methods[J].Acta Geoscientica Sinica,32(4):455-462. |
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