| 浅析末次间冰期以来柴达木盆地东南部古气候环境演化 |
| |
| 引用本文： | 陈宗颜,李义民.浅析末次间冰期以来柴达木盆地东南部古气候环境演化[J].地质灾害与环境保护,2009,20(2):127-131. |
| |
| 作者姓名： | 陈宗颜 李义民 |
| |
| 作者单位： | 1. 青海师范大学生命与地理科学学院,西宁,810008;青藏高原环境与资源教育部重点实验室,西宁,810008
2. 青海省地质基础施工总公司,西宁,810008 |
| |
| 基金项目： | 柴达木盆地地下水资源及其环境问题调查评价 |
| |
| 摘 要： | 在前人研究的基础上，以柴达木盆地察尔汗地区ZK2钻孔沉积物为研究对象。选取古气候替代指标——色度，分析了察尔汗地区近130kaB．P．以来气候的变化．揭示了该区对全球气候变化的响应模式以及古气候变化在色度指标上的表现。结果表明：末次间冰期以来，察尔汗地区环境由温暖湿润冷暖频繁波动干热环境变化，色度L＊，a＊，b＊具体表现为在不同水平的波动。其中b＊较L＊，a＊能更敏感地反映古环境的变化，在温暖湿润的间冰期，b＊值趋向于高值区间；而在寒冷干燥的冰期，b＊值趋向于低值区间波动。这种整体波动的趋势与氧同位素的5个阶段基本吻合。
|
| 关 键 词： | 柴达木盆地 色度 古气候变化 |
PALEOCLIMATE EVOLUTION IN SOUTHEAST OF QAIDAM BASIN SINCE THE LAST INTERGLACIAL |
| |
| CHEN Zong-yan,LI Yi-min.PALEOCLIMATE EVOLUTION IN SOUTHEAST OF QAIDAM BASIN SINCE THE LAST INTERGLACIAL[J].Journal of Geological Hazards and Environment Preservation,2009,20(2):127-131. |
| |
| Authors: | CHEN Zong-yan LI Yi-min |
| |
| Institution: | CHEN Zong-yan,LI Yi-min (1. Biology＆Geography college of Qinghai normal University,Xining 810008,China; 2. Key Laboratory of Qingzang Plateau Environment and Resources(Ministry of Education) ,Xining 810008,China; 3. Total Company of Basic Geological Engineering ,Xining 810008,China) |
| |
| Abstract: | Based on some former researches, the paper analysed the pleaclimate change since the last interglacial. The samples for the study are from ZK2 core in the Charhan region, Qaidam Basin. The discover shows that the patter of the paleoclimate evolution of the study region is a response to the global change during that time. The Eenvironment of the Chaerhan region was frequently changing from warm and humid to dry. The chroma（a＊ ,b＊ ,L＊ ） changes on different scales, and b＊ is more sensitive than a＊ and L＊ for response to paleoclimate change, b＊ is high when environment is warm and humid, while b＊ is low when environment is cold. The variation of b＊ could be compared with the oxygen isotopic stages in deep sea. |
| |
| Keywords: | Qaidam Basin chroma Chroma Paleoclimate Evolution |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
