粘粒含量——夏季风的良好替代指标  

A Good Proxy of East Asian Monsoon-Fine Grain Size

作　　者：管清玉[1] 2潘保田 高红山[1] 王勇 王均平[1] 苏怀[1] 

机构地区：[1]兰州大学地理科学系

出　　处：《干旱区资源与环境》2004年第S2期17-19,共3页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金 ( 4 0 1710 10 )资助

摘　　要：通过对位于东亚季风区尾闾部位的沙沟剖面、东部半湿润区王官剖面、东部湿润区扣马剖面的气候代用指标的分析发现 ,黄土地层中 <5 μm的粘粒含量指标对各剖面中黄土-古土壤序列指示得比较清晰 ,可以较好地反映东亚夏季风的变化。对黄土地层中粘粒含量的测试及其环境意义分析以及与经典的东亚夏季风的替代指标———磁化率、红度指标 (a )的对比分析发现 ,粘粒含量指标的意义比较明确 ,适应范围更广 ,灵敏性也较高 ,是一比较可靠的、新的东亚夏季风的良好替代指标。The analysis of climate proxy of Shagou, Wangguan and Kouma, which located at end-region of East Asian Monsoon, semi-humid region and humid region respectively indicated that the percentage of fine grain size in loess stragraphy could reveal the variation of East Asian summer Monsoon. Comparison of fine grain size with classic East Asian summer Monsoon proxies-magnetic susceptibility,the color reflectance suggested the percentage of fine grain size was more sensitive, widely-used and clear environment significance.

关 键 词：粘粒含量 红度 磁化率 

分 类 号：S152[农业科学—土壤学]