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题名: Taklimakan Desert nocturnal low-level jet: climatology and dust activity
作者: Ge, JM; Liu, HY; Huang, JP(黄建平); Fu, Q
收录类别: SCIE
出版日期: 2016
刊名: ATMOSPHERIC CHEMISTRY AND PHYSICS
卷号: 16, 期号:12, 页码:7773-7783
出版者: COPERNICUS GESELLSCHAFT MBH
出版地: GOTTINGEN
英文摘要: While nocturnal low-level jets (NLLJs) occur frequently in many parts of the world, the occurrence and other detailed characteristics of NLLJs over the Taklimakan Desert (TD) are not well known. This paper presents a climatology of NLLJs and coincident dust over the TD by analyzing multi-year ERA-Interim reanalysis and satellite observations. It is found that the ERA-Interim dataset can capture the NLLJs' features well by comparison with radiosonde data from two surface sites. The NLLJs occur in more than 60aEuro-% of nights, which are primarily easterly to east-northeasterly. They typically appear at 100 to 400aEuro-m above the surface with a speed of 4 to 10aEuro-maEuro-s(-1). Most NLLJs are located above the nocturnal inversion during the warm season, while they are embedded in the inversion layer during the cold season. NLLJs above the inversion have a strong annual cycle with a maximum frequency in August. We also quantify the convective boundary layer (CBL) height and construct an index to measure the magnitude of the momentum in the CBL. We find that the magnitude of momentum in the lower atmosphere from the top of the surface layer to the top of mixed layer is larger for NLLJ cases than for non-NLLJ cases, and in the warm season the downward momentum transfer process is more intense and rapid. The winds below the NLLJ core to the desert surface gain strength in summer and autumn, and these summer and autumn winds are coincident with an enhancement of aerosol optical depth. This indicates that the NLLJ is an important mechanism for dust activity and transport during the warm season over the Taklimakan.
作者部门: [Ge, Jin Ming ; Liu, Huayue ; Huang, Jianping ; Fu, Qiang] Lanzhou Univ, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou 730000, Peoples R China ; [Ge, Jin Ming ; Liu, Huayue ; Huang, Jianping ; Fu, Qiang] Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Peoples R China ; [Liu, Huayue] Hebei Prov Meteorol Serv Ctr, Shijiazhuang 005021, Peoples R China ; [Fu, Qiang] Univ Washington, Dept Atmospher Sci, Seattle, WA 98105 USA
通讯作者: Huang, JP (reprint author), Lanzhou Univ, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou 730000, Peoples R China. ; Huang, JP (reprint author), Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Peoples R China.
学科分类: Meteorology & Atmospheric Sciences
文章类型: Article
所属项目编号: National Science Foundation of China [41275070, 41521004, 41575016] ; China 111 project [B 13045] ; Fundamental Research Funds for the Central University [lzujbky-2015-K02]
所属项目名称: 国家自然科学基金项目 ; 高等学校学科创新引智计划(111计划) ; 中央高校基本科研业务费专项资金
项目资助者: NSFC ; MOE ; SAFEA ; LZU
语种: 英语
DOI: 10.5194/acp-16-7773-2016
ISSN号: 1680-7316
WOS记录号: WOS:000379417300018
IR记录号: WOS:000379417300018
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/182598
Appears in Collections:大气科学学院_期刊论文

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Recommended Citation:
Ge, JM,Liu, HY,Huang, JP,et al. Taklimakan Desert nocturnal low-level jet: climatology and dust activity[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2016,16(12):7773-7783.
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