关中地区全新世黄土磁化率与气候要素关系研究  

Research on relationship between holocene soil magnetic susceptibility and climatic elements in Guanzhong plain

作　　者：顾静[1] 庞奖励[1] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2006年第2期100-104,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(40471119)

摘　　要：通过测定和对比关中黄土剖面的磁化率数据,依据磁化率与温度、降水量回归方程,对该区全新世气候要素进行了计算.结果表明,关中地区全新世中期年平均温度约为13.00℃.计算得出的关中地区古温度值比其他资料估算值普遍偏低,古降水量值与其他资料估算值接近.因此,在计算全新世温湿期温度时,应加上校正值1.50℃才与实际值相符.古降水量可以作为当时的降水量考虑.计算全新世气候要素应以磁化率高值段的平均值为依据.由于该区黏土物质迁移等影响,古土壤磁化率高值段一般不能代表该层段的气候要素,而是表征上层段最温湿阶段的气候要素.Through measuring and comparing the magnetic susceptibility dates of loess profile in Guanzhong plain, and according to regression equation the temperature, precipitation, the climate elements in this area were calculated. The results show that the average temperature in the middle Holocene is around 13.00℃. The temperature is generally lower than estimated by other information. The precipitation is close to estimated by other information. Therefore, it should be added 1.50℃ to the calculations in middle Holocene. The precipitation can basically represent the fossil precipitation; the calculations in the climate elements Holocene should be based on the average high of magnetic susceptibility the result of representativeness is weak when they are based on maximum, minimum and average of magnetic susceptibility. Since the influence of clay materials here, the high calculations of magnetic susceptibility in fossil soil do not represent the climate elements of this layer, but represent the most warm and humid climate elements- of the upper layer.

关 键 词：全新世 磁化率 温度 降水量 代表值 

分 类 号：P534.632[天文地球—第四纪地质学]