【作者】 靳建辉； 李志忠； 凌智永；

【Author】 JIN Jianhui 1,2, LI Zhizhong1,2,3, LING Zhiyong3 (1. School of Geography Science, Fujian Normal University, Fuzhou 350007, China; 2. Key Laboratory of Humid Subtropical Ecosystem and Geography, Ministry of Education, Fuzhou 350007, China; 3. School of Geography and Tourism, Xinjiang Normal University, Urumqi 830054, China)

【机构】 福建师范大学地理科学学院； 湿润亚热带生态-地理过程教育部重点实验室； 新疆师范大学地理科学与旅游学院；

【摘要】 在新疆伊犁河谷塔克尔莫乎尔沙漠腹地,选择可克达拉剖面(TKP)进行光释光(OSL)年代测定和主元素含量分析,根据主元素组合及其比值变化重建研究区3.71kaBP以来的气候环境变化序列。结果表明,近4kaBP以来研究区气候环境演变大体经历5个阶段的变化:3.71-3.06kaBP,冷湿,3.06-2.78kaBP,暖干;2.78-2.10kaBP,凉湿;2.10-0.50kaBP,冷湿;0.50kaBP以来为凉干气候为主,最近100a趋于暖干。研究区晚全新世以来的气候变化阶段与我国东部季风区以及北半球气候变化阶段有很好的可比性,但各气候变化阶段的水热组合又具有典型的西风带气候模式特征,并与中高纬度北大西洋区域的气候变化具有很好的遥相关,因此TKP剖面的古气候记录可能反映了全球气候变化响应的区域差异性。更多还原

【Abstract】 Takelmukul Desert is a fixed and semi-fixed desert,which interlaces with mobile dunes, lakes and rivers.The deposits in Holocene stratum of the study region belong to Aeolian facies.The Kekedala geologic section is selected and sampled for analyzing major elements and dating the forming age.The distributing characters and the integrated parameters of chemical elements corporately indicated that the regional climate had aridization tendency and have experienced several cycles between cold-humid(cool-humid) and warm-arid since 4 ka BP.On the whole,the climatic changes could be divided into 5 stages:3.71-3.06ka BP,cold and humid;3.06-2.78ka BP,warm and arid; 2.78-2.10ka BP,cool and humid;2.10-0.50 ka BP,cold and humid;0.50ka BP to present,cool and arid;It fends to warm and arid in recent 100a. The climatic stages have fairly good comparability among the study region ,eastern monsoon areas and northern hemisphere. The hydro-thermal characteristic of each stage has typical characteristics of westerly climatic zone in the study region and has fairly good teleconnection between study region and mid-high latitude north Atlantic region. The paleoclimatical record of TKP section may reflects regional difference of global climate change. There must be mentioned that all of the climatic changes are based on precondition of aridity.更多还原