黄土高原平凉地区中全新世以来的植硅体记录与古气候研究  

Holocene Phytolith Record and Paleoclimate Research in Pingliang of the Loess Plateau

作　　者：刘林敬[1] 杨振京[1] 赵华[1] 叶浩[1] 毕志伟[1] 杨庆华[1] 赵红梅[1] 赵永杰[2] 

机构地区：[1]中国地质科学院水文地质环境地质研究所,河北石家庄050061 [2]河北师范大学汇华学院,河北石家庄050091

出　　处：《地理与地理信息科学》2012年第2期104-107,共4页Geography and Geo-Information Science

基　　金：中国地质科学院水文地质环境地质研究所基本科研业务费项目(SK201001);中国地质调查局地质调查项目(1212010911048);国家自然科学基金项目(40972212)

摘　　要：通过黄土高原西部平凉剖面的植硅体分析,对黄土高原西部全新世中晚期气候进行研究,将研究时期的气候分为5个阶段:8.43～7.78KaB.P.,气候凉湿;7.78～7.17KaB.P.,气候暖湿;7.17～6.27KaB.P.,气候总体仍为暖湿,但较上带有变冷趋势;6.27～5.55KaB.P.,气候特征为凉湿;5.55～0KaB.P.,气候特征仍为凉湿,但具有偏凉干趋势。明显的气候波动与全新世中晚期全球变化可以对比,与相邻区域的孢粉、粒度、磁化率等研究工作结果较为一致。Through the phytolith analysis of Pingliang profiles in the western Loess Plateau,the Holocene Paleoclimate of the western Loess Plateau was studied.The climate period can be divided into five stages：8.43~7.78 KaB.P.,cool and wet climate;7.78~7.17 KaB.P.,warm and humid climate;7.17~6.27 KaB.P.,still warm and humid climate in general,but with a cooling trend compared with the previous;6.27~5.55 KaB.P.,the climate was characterized by cool and wet;5.55~0 KaB.P.,still cool and wet climate characteristics,but with a slightly cool and dry trend.Significant climate fluctuations and global change in the late Holocene compared with the adjacent region of pollen,grain size,magnetic susceptibility and other research results were more consistent.

关 键 词：植硅体 古气候 中全新世 平凉剖面 黄土高原 

分 类 号：P532[天文地球—古生物学与地层学]