全新世黄土-古土壤序列色度特征及气候意义——以关中平原西部梁村剖面为例  

Chroma characteristics and its climatic significance in Holocene loess-paleosol sequence——A case study of the Holocene Liangcun profile in the western Guanzhong basin

作　　者：丁敏[1,2] 庞奖励[1] 黄春长[1] 彭淑贞[2] 杨炯[2] 陈栋栋[2] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062 [2]泰山学院旅游与资源环境学院,山东泰安271021

出　　处：《陕西师范大学学报（自然科学版）》2010年第5期92-97,共6页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(40471119);黄土与第四纪地质国家重点实验室基金资助项目(SKLLQG0604)

摘　　要：利用K-MinoltaCR-400色度仪分别测试研究剖面土壤色度指标(亮度、红度和黄度),并与研究剖面其他常用气候替代指标磁化率、CaCO3和Rb/Sr比等进行对比分析,结果发现:红度和亮度指标对气候响应敏感,能够揭示全新世早中晚三个阶段千年尺度的季风演变和气候变化,对于次级变化即百年尺度的变化也有明显指示;红度指标对气候响应更为敏感,变化幅度大,波动多,有助于揭示气候的转折和弱成壤古土壤的存在,但也具有一定的气候局限性;亮度指标大致可揭示区域降水量的多少;黄度指标在本剖面对气候的响应有限.The chroma index of lightness,redness and yellowness were measured respectively by K-MinoltaCR-400 and compared with the magnetic susceptibility,CaCO3 and Rb / Sr ratio.The results showed that redness and lightness indicators are sensitive to climate,which can reveal millennial scale monsoon holocene climate change,and furthermore sub-century scale changes.Redness is more sensitive to climate change in amplitude,and more helpful to reveal the climate of transition and the weak paleosol of ancient soils,but also has some limitations.Lightness is sensitive to changes and can be broadly reveal how much the regional precipitation.Yellowness index has the limited response to climate at Liangcun profile.

关 键 词：色度 黄土-古土壤 全新世 关中平原 环境演变 

分 类 号：P934[天文地球—自然地理学]