摘要
戈壁是中国西北干旱区的重要地表类型之一,被认为是我国乃至于中亚的沙尘暴源区。受戈壁特殊下垫面影响,沙尘释放过程与机理明显不同于沙漠等其他地表类型。系统分析了影响沙尘释放过程的风动力系统、地貌格局和下垫面特征;从摩阻起动风速和地表粗糙度的角度探讨了戈壁沙尘释放的机理。最后在总结前人工作基础上,结合区域和全球沙尘释放模型的需要,提出加强戈壁地表性质参数化过程、戈壁区沙源甄别和沙尘释放机理是戈壁沙尘释放研究的重中之重。
Gobi is one of the most important landscapes in northwest China,and it is also one of the dust sources in north China and even in central Asia. Based on the different land surface characteristics on the gobi surface,sand and dust emission process and mechanism are obviously different with other landscapes,such as sandy desert. Dust emission process and mechanism on the gobi surface were analyzed in this paper. Wind power system,geomorphology pattern and underlying characteristics were considered for their effect on the sand and dust emission process. Then,the mechanism of land surface characteristics on threshold wind velocity was analyzed. Finally,based on the previous studies on dust emission and mechanism,and in combination with the regional and global requirement, we suggested that the land surface characteristics parameterization,identification of the dust sources and sediment emission mechanism should be the main issues in the future gobi sand and dust research.
作者
张正偲
潘凯佳
梁爱民
董治宝
李兴财
Zhang Zhengcai;Pan Kaijia;Liang Aimin;Dong Zhibao;Li Xingcai(Key Laboratory of Desert and Desertification,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Geography and Tourism,Shaanxi Normal University,Xi’an 710119,China;School of Physics&Electronic-Electrical Engineering,Ningxia Key Laboratory of Intelligent Sensing for the Desert Information,Ningxia University,Yinchuan 750021,China)
出处
《地球科学进展》
CAS
CSCD
北大核心
2019年第9期891-900,共10页
Advances in Earth Science
基金
国家自然科学基金项目“阿拉善高原西居延海地区冲积—洪积砂砾戈壁粉尘释放机理与模型研究”（编号：41971014）
宁夏回族自治区重点研发计划项目“荒漠化地区光伏电站电能高效预测的若干关键技术研究”（编号：2018BFH03004）资助~~
关键词
戈壁
沙尘
过程与机理
Gobi
Sand and dust
Process and mechanism
