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| 柴达木盆地尕海湖区冰消期晚期以来的气候环境演变 | |
| 引用本文： | 陈忠,马海州,曹广超,张西营,周笃珺,姚远,谭红兵,高章洪.柴达木盆地尕海湖区冰消期晚期以来的气候环境演变[J].地球化学,2007,36(6):578-584. |
| 作者姓名： | 陈忠 马海州 曹广超 张西营 周笃珺 姚远 谭红兵 高章洪 |
| 作者单位： | 1. 昆明理工大学,国土资源工程学院,云南,昆明,650093;中国科学院,青海盐湖研究所,青海,西宁,810008 2. 中国科学院,青海盐湖研究所,青海,西宁,810008 3. 中国科学院,青海盐湖研究所,青海,西宁,810008;中国科学院,研究生院,北京,100049;青海师范大学,生命与地理科学学院,青海,西宁,810008 4. 中国科学院,研究生院,北京,100049;中国科学院,南京地理与湖泊研究所,江苏,南京,210008 |
| 基金项目： | 中国科学院知识创新工程重要方向项目(KZCX2-SW-118) |
| 摘 要： | 通过对柴达木盆地东部尕海湖沉积物碳酸盐含量、自生碳酸盐碳氧同位素等指标的综合分析,建立了尕海湖地区自冰消期晚期以来的气候环境演变特征。结果表明,冰消期(12710～11360aB.P.)气候环境变化较大;进入全新世(自11360aB.P.开始)后,早全新世(11360～8370aB.P.)气候波动明显,整体较为干旱,温度有所回升;中全新世(8370～3200aB.P.),早期为湿润气候环境,是全新世气候环境最稳定的阶段,晚期气候环境仍较湿润,但环境条件变差;在晚全新世(3200aB.P.以来),早期湖泊水体仍然较淡,但气候环境明显趋向干旱,后期气候变得干旱,气候环境存在波动变化。约1500aB.P.存在一次湿润事件。 |
| 关 键 词： | 冰消期晚期 全新世 气候演化 碳酸盐含量 碳氧同位素 尕海湖 |
| 文章编号： | 0379-1726（2007）06-0578-07 |
| 修稿时间： | 2007-01-24 |
Climatic-environmental evolution in Gahai Lake area of Qaidam Basin since Late Last Deglacial Period |
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| CHEN Zhong,MA Hai-zhou,CAO Guang-chao,ZHANG Xi-ying,ZHOU Du-jun,YAO Yuan,TAN Hong-bing,GAO Zhang-hong.Climatic-environmental evolution in Gahai Lake area of Qaidam Basin since Late Last Deglacial Period[J].Geochimica,2007,36(6):578-584. | |
| Authors: | CHEN Zhong MA Hai-zhou CAO Guang-chao ZHANG Xi-ying ZHOU Du-jun YAO Yuan TAN Hong-bing GAO Zhang-hong |
| Institution: | 1. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 4. School of Life and Geography Science, Qinghai Normal University, Xining 810008, China;5. Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China |
| Abstract: | Gahai Lake in Qaidam Basin is a closed lake,and is therefore a good site to study paleoclimate.Based on the analyses of carbonate content,oxygen and carbon stable isotope compositions of authicarbonate in Core DG03,which is about 35 m in depth and drilled from Gahai Lake,a climatic-environmental evolution since the late Last Deglacial Period is constructed.The results show that the change in climate and environment was large during the late Last Deglacial Period.During the early Holocene(11360-8370 a B.P.),it was arid and became warm,but with a distinct fluctuation of climate.The mid-Holocene was wet,with stable climatic environment in the early period(8370-5390 a B.P.),and then cool but humid in the late period(5390-3200 a B.P.).The late Holocene was dry on the whole,rather humid with dry trend in the early period(3200-1950 a B.P.) and then very arid in the late period.There was a wet event at about 1500 a B.P.during the late Holocene. |
| Keywords: | late Last Deglacial Period Holocene climate evolution carbonate content oxygen and carbon isotope Gahai Lake |
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