| 阿拉善高原频发沙尘暴因素分析 |
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| 引用本文： | 姚正毅,王涛,杨经培,朱开文,周俐.阿拉善高原频发沙尘暴因素分析[J].干旱区资源与环境,2008,22(9). |
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| 作者姓名： | 姚正毅 王涛 杨经培 朱开文 周俐 |
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| 作者单位： | 1. 中国科学院寒区早区环境与工程研究所沙漠与沙漠化重点实验室,兰州,730000
2. 内蒙古自治区阿拉善盟气象局,阿拉善左旗,750300 |
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| 摘 要： | 阿拉善高原是几条强冷空气的主要交汇处,冷空气活动频繁,干旱荒漠区风的作用十分强烈,年大风日数西北部多达50~100d,东南部较少,也达15~30d。阿拉善高原上的尘源物质丰富,有流动沙丘79928km2,半固定沙丘13113km2,粉粒含量在1.18%-2.00%。阿拉善高原有11个干旱湖盆,总面积达10581.3km2。粉粒平均含量达到63.08%。人类活动对沙尘暴加强作用主要表现在三个方面:不合理用水导致湖泊萎缩,形成干旱湖盆;破坏地表植被及土体结构;采矿业增加工业粉尘。
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| 关 键 词： | 阿拉善高原 频发 沙尘暴 尘源物质 |
Analysis on Frequently Occurrence of Dust Storm in the Alxa Plateau |
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| YAO Zheng-yi,WANG Yao,YANG Jing-pei,ZHU Kai-wen,ZHOU Li.Analysis on Frequently Occurrence of Dust Storm in the Alxa Plateau[J].Journal of Arid Land Resources and Environment,2008,22(9). |
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| Authors: | YAO Zheng-yi WANG Yao YANG Jing-pei ZHU Kai-wen ZHOU Li |
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| Abstract: | Based on meteorological data and silt content of surface soil,the reasons for frequent occurrence of dust storm in the Alxa Plateau were analyzed.The results showed that the Alxa Plateau stands at the junction of three winter monsoon paths and has strong wind in winter and spring.The windy days is 50～100d in the northwest and 15～30d in the southeast of the Alxa Plateau.The Alxa Plateau is in rich of dust source-silt.There are 79928 km2 migrating dunes and 13113km2 semi-migrating dunes in the Alxa Plateau,and their silt content is between 1.18% and 2.00%.There are 11 dried lake basins in the Alxa Plateau and total area is 10581.3km2.The average silt content of these dried lake basins is 63.08%.The strengthen action of human activities are mainly exhibited in three aspects: lake shrinkage and forming dried lake basins resulting from irrationality using water at upper and middle basin;destroy of surface vegetation and soil structure;increase of industry powder by growth of mining. |
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| Keywords: | Alxa Plateau frequent occurrence dust storm dust source |
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