近200年来安迪尔故城红柳沙包孢粉组合与环境变化  

Pollen assemblages of Tamarix cone and environmental change in Andier ancient city region during the recent 200 years

作　　者：赵灿[1] 郭峰[1] 赵元杰[1] 夏训诚[2] 

机构地区：[1]河北师范大学资源与环境科学学院,河北省环境演变与生态建设重点实验室,石家庄050024 [2]中国科学院新疆生态与地理研究所,乌鲁木齐830011

出　　处：《干旱区资源与环境》2015年第11期158-163,共6页Journal of Arid Land Resources and Environment

基　　金：NSFC-新疆联合基金项目(U1303285);国家自然科学基金项目(41071133);河北省重点学科自然地理学建设项目资助

摘　　要：塔克拉玛干沙漠南缘安迪尔故城红柳沙包剖面孢粉分析结果表明：1792年以来,安迪尔故城地区孢粉组成以草本植物花粉为主,灌木植物花粉次之,乔木植物花粉较少,蕨类孢子和水生植物含量较低,植被演化经历了荒漠灌丛-荒漠草原-荒漠灌丛的演替过程。利用转换函数法进行的古气候定量重建结果显示,相对于研究时段的平均值,研究区气候变化经历了3个阶段：1792-1905年为暖干期,气温逐渐上升,年平均气温为10.6-12.6℃,降水量变化在33.4-70.4mm之间,期间出现若干个小的冷暖交替期;1905-1950年气候冷湿,气温下降明显,年平均气温为9.5-11.7℃,降水明显增多,降水量变化在52.9-95.1mm之间;1950年后为暖湿期,气温逐步回升,平均气温为10.2-12.2℃,降水变化在47.3-81.6mm,仍相对湿润。The study on 44 fossil pollen samples of Tamarix cone sedimentary veins from the Andier ancient city indicated that the pollen assemblages consist of mainly the herb pollen and the shrub pollen,followed by the tree pollen,few of fern spores and aquatic plants. The vegetation in Andier ancient city region had succeeded from the desert- shrub to the desert- grass,then to the desert- shrub vegetation since 1792. Based on the finished pollen samples,we reconstructed the process of climate change quantitatively by using of WAPLS method,which could be divided into 3 stages： from 1792 to 1905,the climate was warm and dry,the annual average temperature had risen gradually from 10. 5℃ to 12. 6℃,the annual precipitation changed between 33. 4 mm and 70.4mm,however,there were several secondary warm and cool cycles during this period. During the period from1905 to 1950,the climate was cold and wet,the annual average temperature had been falling continuously from9. 5℃ to 11. 7℃,the annual average precipitation had increased significantly from 52. 9 mm to 95. 1mm. After1950,the annual average temperature had increased gradually from 10. 2℃ to 12. 2℃,and the annual precipitation that was between 47. 3mm and 81. 6mm decreased but still relatively humid.

关 键 词：古环境重建 红柳沙包 孢粉分析 塔克拉玛干沙漠南缘 

分 类 号：Q914[天文地球—古生物学与地层学]