| 埋藏古木的树轮碳同位素作为古气候变化代用指标的可能性 |
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| 关键词:buried ancient timber tree-ring α-cellulose δ 13C climate change |
| 基金项目:国家自然科学基金项目(编号:40071082) |
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| 摘要: |
| The Possibility of Using the δ 13C Sequence of α-Cellulose of the annual ring Buried Ancient Timbers as Substituting Indices for Paleo-climate Change Research |
| The tree-ring α-cellulose △δ 13C sequences of various sorts of buried ancient timber belonging to different epochs and different tree species in Guangdong Province were respectively measured. The analyses show that the δ 13C of ancient Cinnamomum camphora trees and ancient Idesia polycarpa trees which grew in a relatively warm and humid environment was more positive than the δ 13C of the trees which grew in a relatively cool and dry environment. Here are some conclusions: (1) the ancient Idesia polycarpa trees reflect the cool climate after the ice age;(2) the ancient Cinnamomum camphora trees reflect humid climate in tropical region during the mid- Holocene; and (3) the death of ancient Glyptostrobus pensilis trees in large quantities reflect several cold events during the late-Holocene and some other historic periods. These conclusions indicate the possibility of using the tree-ringδ 13C α-cellulose sequence of the buried ancient timber as the substituting index for paleo-climate change research in the tropical zone. The contrast between ancient times and modern ages has enriched the contents of dendro-climatology. |
| SUN Yan-rong,CUI Hai-ting,LIU Hong-yan,LI Ping-ri,TAN Hui-zhong.2006.The Possibility of Using the δ 13C Sequence of α-Cellulose of the annual ring Buried Ancient Timbers as Substituting Indices for Paleo-climate Change Research[J].Acta Geoscientica Sinica,27(6):577-582. |
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