| A METHOD TO ESTIMATE PALEOTEMPERATURE FROM ENVIRONMENTAL PROXIES IN LAKE SEDIMENTS——A STUDY ON ZOIGE BASIN IN EASTERN TIBETAN PLATEAU, CHINA |
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| 摘 要： |
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| 关 键 词： | 评价 海洋古温度 环境 盆地 |
| 收稿时间： | 20 October 1999 |
| 修稿时间： | 10 October 2000 |
A method to estimate paleotemperature from environmental proxies in lake sediments— A study on Zoige Basin in Eastern Tibetan Plateau, China |
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| Authors: | Jing-lu Wu A Luecke Wei-lan Xia Shi-jie Li G H Schleser Su-min Wang |
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| Institution: | (1) Nanjing Institute of Geog. & Limn. CAS, 210008 Nanjing, China;(2) Forschungszentrum Juelich, ICG-4, D-52A25 Juelich, Germany |
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| Abstract: | Seeking for an effective method to probe further the relation among Tibetan Plateau, climatic events, and natural environmental
changes in the Zoige Basin, we proposed a physical model for the reconstruction of climate and environment and a preliminary
application was conducted on the 45 m (about 200 ka BP), upper part of Core RM (310 m long) drilled in the Zoige Basin (33°57’N,
102°21’E), on the eastern Tibetan Plateau. The results showed that: a) in the Zoige region, the maximum temperature in the
period equivalent to Stage 7 in the deep-sea stable oxygen record was 2.7°C higher than that at present; b) Stage 6 temperature
was 4.3°C lower than that at present; c) Stage 5 peak temperature was 5.2°C higher that that at present; d) Stage 4 average
temperature should have been 2–3°C lower than that at present; and e) Stage 3 temperature differences within the period were
more than 4°C. It was found that during Stage 6 (140–160 ka BP) the environment in the Zoige Basin was extraordinary, representing
a transition period from warm-dry and cold-wet to warm-wet and cold-dry environmental conditions due to the uplift that occurred
on the Tibetan Plateau at this period.
Project 49803001 supported by NSFC and also funded by National and CAS Tibet Research Project (G1998040800). |
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| Keywords: | Zoige Basin stable isotope paleotemperature physical model |
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