| 长安四府村32～10 ka BP期间沙尘暴活动的记录 |
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| 引用本文： | 蔡小薇,赵景波. 长安四府村32～10 ka BP期间沙尘暴活动的记录[J]. 中国沙漠, 2005, 25(3): 409-411 |
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| 作者姓名： | 蔡小薇 赵景波 |
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| 作者单位： | 1. 陕西师范大学,旅游与环境学院,陕西,西安,710062
2. 陕西师范大学,旅游与环境学院,陕西,西安,710062;中国科学院,地球环境研究所黄土与第四纪地质国家重点实验室,陕西,西安,710075 |
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| 基金项目： | 陕西师范大学历史地理国家重点学科项目(SNNUHG04007)，中国科学院黄土与第四纪地质国家重点实验室项目(SKLLQG0411)共同资助 |
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| 摘 要： | 通过对长安区四府村剖面晚更新世后期黄土样品的粒度分析测定,探讨了沙尘暴活动与土壤颗粒组成的关系及32～10kaBP以来的沙尘暴的活动趋势。结果表明,黄土古土壤序列中粗粉砂含量高和粘粒含量低,反映当时沙尘暴活动强烈,反之,沙尘暴活动弱。冰期沙尘暴活动强主要是冰期降水量少造成的,温度低是次要的。古土壤层S10中的粘粒既包含风尘堆积的原始组分,也包含风化成壤过程中对先前发育的黄土L21改造后的次生组分。32～10kaBP以来,沙尘暴活动具有由弱到强的变化趋势,其中23～10kaBP间活动最强。
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| 关 键 词： | 长安四府村 晚更新世后期 黄土记录 颗粒成分 沙尘暴 |
| 文章编号： | 1000-694X(2005)03-0409-03 |
| 修稿时间： | 2004-01-20 |
Loess Record of Sand-Dust Storm Activity during 32～10 ka BP in Sifu Village, Chang''''an, Shaanxi Province |
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| CAI Xiao-wei,ZHAO Jing-bo. Loess Record of Sand-Dust Storm Activity during 32～10 ka BP in Sifu Village, Chang''''an, Shaanxi Province[J]. ournal of Desert Research, 2005, 25(3): 409-411 |
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| Authors: | CAI Xiao-wei ZHAO Jing-bo |
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| Affiliation: | CAI Xiao-wei 1,ZHAO Jing-bo 1,2 |
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| Abstract: | According to the grain-size analysis of Loess sample developed in late Pleistocene, we discuss the relationship between the activity of sand-dust storm and grain-size of Loess profile, and know the trend of sand-dust storm activity from 32 ka BP to 10 ka BP. As the result, the content of thick grain reflected the strong period of sand-dust storm activity; on the country, the content of thin grain reflected the sand-dust storm was weak. The sand-dust storm activity was strong during ice age mainly because of the less precipitation but not the low temperature. The form of palaeosol S1 0 is caused by later change of Loess L2 1. The sand-dust storm activity had changing trend from weak to strong from 32 ka BP to 10 ka BP. |
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