| 新疆伊犁河谷晚全新世风沙沉积粒度旋回与气候变化 |
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| 引用本文： | 李志忠,凌智永,陈秀玲,王少朴,曹相东.新疆伊犁河谷晚全新世风沙沉积粒度旋回与气候变化[J].地理科学,2010,30(4):613-619. |
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| 作者姓名： | 李志忠 凌智永 陈秀玲 王少朴 曹相东 |
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| 作者单位： | 1. 福建师范大学地理科学学院, 福建 福州 350007;2. 福建省亚热带资源与环境重点实验室, 福建 福州 350007;3. 新疆师范大学地理科学与旅游学院, 新疆 乌鲁木齐 830054 |
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| 基金项目： | 国家"十一五"科技支撑计划项目(2007BAC15B07)、新疆维吾尔自治区自然科学基金项目(200821103)资助。 |
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| 摘 要： | 对新疆伊犁河谷可克达拉剖面(TKP)晚全新世沉积粒度参数及其气候意义分析结果表明:总体为植被较好、输沙势较弱的沉积环境。可以划分为5个气候变化阶段:3.71~3.06 ka B.P.风力由强到弱,气候暖由干到凉湿;3.06~2.78 ka B.P.风力很强、气候暖干;2.78~2.10 ka B.P.风力较弱,气候湿润;2.10~0.5 ka B.P.前期风力振荡频繁,气候较湿润;后期风力减弱、气候冷湿、成壤作用较强;0.50 ka B.P.以来,以相对冷湿为主,最近100 a来风力加强、气候趋于暖干。各阶段起止与全球气候变化基本一致,但受西风环流传递北高纬大西洋区域气候变化的影响,各气候期水热组合呈现典型西风带模式特征。
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| 收稿时间： | 2009-09-23 |
| 修稿时间： | 2009-12-24 |
Late Holocene Climate Changes Revealed by Grain-size Cycles in Takemukul Desert in Yili of Xinjiang |
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| LI Zhi-zhong,LING Zhi-yong,CHEN Xiu-ling,WANG Shao-pu,CAO Xiang-dong.Late Holocene Climate Changes Revealed by Grain-size Cycles in Takemukul Desert in Yili of Xinjiang[J].Scientia Geographica Sinica,2010,30(4):613-619. |
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| Authors: | LI Zhi-zhong LING Zhi-yong CHEN Xiu-ling WANG Shao-pu CAO Xiang-dong |
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| Institution: | 1. Geography Science College, Fujian Normal University, Fuzhou, Fujian 350007;2. Provincial Key Lab of Subtropical Resources and Environment of Fujian, Fuzhou, Fujian 350007;3. Geography Science and Tourism College, Xinjiang Normal University, Urumqi, Xinjiang 830054 |
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| Abstract: | This paper discussed the climatic significance of grain-size parameters such as Mz, σ1, SK1, Kg, D/SC, the coarse fraction(>63μm) and the clay fraction (<2μm) of 72 samples, which collected from Kekdala section (TKP) in the heart of Takelmukul desert in Yili Valley, Xinjiang. Based on parameters and OSL date data of TKP, five climate evolution stages can be divided since the late Holocene. First stage, from 3.71 kyr BP to 3.06 kyr BP, wind changed from strong to weak, and climate changed from warm-dry to cool-wet. Second stage, from 3.06 kyr BP to 2.78 kyr BP, the grain-size was very coarse, wind was very strong and the climate was warm and dry. Third stage, from 2.78 kyr BP to 2.10 kyr BP, wind was weak, vague soil formed, the climate was wet and little fluctuation. Fourth stage, from 2.10 kyr BP to 0.5 kyr BP, climate was wet, wind was strong-weak alternation and changed frequently in earlier stage; then the wind became weak and climate was cold-wet, and pedogenesis was strong. Last stage, from 0.50 kyr BP to today, the climate was relatively wet as a whole, but wind became stronger and climate was warm-dry in the latest 100 yr. The climate change agreed well with that of global change. Since the late Holocene, due to climatic change of north Atlantic in high latitude, the climate change model of Takelmukul desert has typical westerly characteristics. |
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