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| DOI | 10.1016/j.aeolia.2021.100710 |
| Seasonal changes and migration of longitudinal dunes in the northeastern Rub'al Khali Desert | |
| Xiao, Jianhua; Xie, Xiaosong; Zhao, Hui; Chen, Can; Ma, Xixi; Qu, Jianjun; Yao, Zhengyi | |
| 通讯作者 | Yao, ZY (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China. |
| 发表日期 | 2021 |
| ISSN | 1875-9637 |
| EISSN | 2212-1684 |
| 卷号 | 51 |
| 英文摘要 | The morphology of small longitudinal dunes responded clearly to wind fields in the northeastern Rub'al Khali Desert. Based on local meteorological data and high-resolution satellite images, we analyzed the wind regime, drift potential (DP), dune morphology changes, and migration rates. The wind roses revealed that two opposing winds (from the northwest and southeast), both at an oblique angle to the dune crest, dominated the structure of the wind regime, with periodic changes between these directions. The annual DP from 2017 to 2019 ranged from 615 to 688 vector units (VU), and the resultant drift potential (RDP) ranged from 149 to 311 VU, indicating a high-energy wind environment. The most erosive winds (DP > 60 VU) occurred from February to June. Controlled by the wind field, dune morphology remained longitudinal from September to May. However, small longitudinal dunes (height below 5 m) transformed into transverse dunes from June to August, and formed a dune network with the large longitudinal dunes. On flat land, a series of active longitudinal dunes migrated at 7.8 to 15.1 m yr(-1), with a mean of 11.9 m yr(-1). Their dominant migration mode was parallel to the resultant drift direction (RDD), with the dunes extending downwind via accretion at the downwind ends. These dunes also migrate laterally by 0.4 to 0.8 m yr(-1) while maintaining a symmetrical longitudinal dune morphology. These results expand our knowledge of dune migration and evolution, and provide guidance for protecting areas such as oases threatened by migrating dunes. |
| 关键词 | AL-KHALIMORPHOLOGICAL VARIABILITYSIMPSON-DESERTWIND REGIMESSEIF DUNESSAND DUNESWESTERNTITANFIELDEDGE |
| 英文关键词 | Longitudinal dunes; Dune morphology; Dune migration; Rub'al Khali Desert |
| 语种 | 英语 |
| WOS研究方向 | Physical Geography |
| WOS类目 | Geography, Physical |
| WOS记录号 | WOS:000662685200005 |
| 来源期刊 | AEOLIAN RESEARCH
 |
| 来源机构 | 中国科学院西北生态环境资源研究院 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/253736 |
| 作者单位 | [Xiao, Jianhua; Ma, Xixi; Qu, Jianjun; Yao, Zhengyi] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Xie, Xiaosong; Zhao, Hui; Chen, Can] Shanghai Elect Power Generat Engn Co, Shanghai 201612, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiao, Jianhua,Xie, Xiaosong,Zhao, Hui,et al. Seasonal changes and migration of longitudinal dunes in the northeastern Rub'al Khali Desert[J]. 中国科学院西北生态环境资源研究院,2021,51. |
| APA | Xiao, Jianhua.,Xie, Xiaosong.,Zhao, Hui.,Chen, Can.,Ma, Xixi.,...&Yao, Zhengyi.(2021).Seasonal changes and migration of longitudinal dunes in the northeastern Rub'al Khali Desert.AEOLIAN RESEARCH,51. |
| MLA | Xiao, Jianhua,et al."Seasonal changes and migration of longitudinal dunes in the northeastern Rub'al Khali Desert".AEOLIAN RESEARCH 51(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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