DOI: 10.1002/jgrd.50251
论文题名: Long-term measurement of daytime atmospheric mixing layer height over Hong Kong
作者: Yang D. ; Li C. ; Lau A.K.-H. ; Li Y.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 5 起始页码: 2422
结束页码: 2433
语种: 英语
英文关键词: aerosol lidar
; mixing layer height
Scopus关键词: Aerosols
; Air quality
; Compressed air
; Mixing
; Optical radar
; Aerosol layer structure
; Aerosol lidars
; Atmospheric mixing
; Atmospheric phenomena
; Interannual variation
; Long-term measurements
; Mixing layer height
; Temporal and spatial
; Atmospheric humidity
; air quality
; algorithm
; atmospheric pollution
; data set
; height determination
; humidity
; lidar
; mixed layer
; mixing
; radiosonde
; resolution
; China
; Hong Kong
; New Territories
; Yuen Long San Hui
英文摘要: Lidar has unique advantages in temporal and spatial resolution to measure the atmospheric mixing layer height (MLH), which is important for analyzing atmospheric phenomena. However, long-term MLH information over several years, which has important significance in air quality and climate studies, is seldom obtained from lidar data due to the scarcity of long-running lidar observations. In this paper, we retrieve and analyze daytime MLH from a data set of a lidar that operated continuously over 6.5 years at Yuen Long, Hong Kong. A new algorithm has been developed for consistently retrieving MLH from this large data set, handling all possible weather conditions and aerosol layer structures. We analyze the diurnal, seasonal and inter-annual variation of MLH over Hong Kong and find a unique phenomenon that the afternoon MLH is higher in autumn than in summer, which is verified by radiosonde results and explained by thermal stability and humidity effect. Moreover, we find a slightly decreasing trend of the daily maximum of MLH, which implies a continually compressed air volume into which pollutants and their precursors are emitted, which is one of the possible factors leading to deteriorated air quality over Hong Kong region. © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63886
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China; Institute for the Environment, Hong Kong University of Science and Technology, Kowloon, Hong Kong
Recommended Citation:
Yang D.,Li C.,Lau A.K.-H.,et al. Long-term measurement of daytime atmospheric mixing layer height over Hong Kong[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(5)