DOI: 10.1016/j.atmosenv.2017.06.002
Scopus记录号: 2-s2.0-85020280544
论文题名: 8-Year ground-based observational analysis about the seasonal variation of the aerosol-cloud droplet effective radius relationship at SGP site
作者: Qiu Y ; , Zhao C ; , Guo J ; , Li J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 164 起始页码: 139
结束页码: 146
语种: 英语
英文关键词: Aerosol-cloud interaction
; Low clouds
; Precipitable water vapor
; SGP site
Scopus关键词: Drops
; Water vapor
; Wind
; Aerosol-cloud interaction
; Limited observations
; Meteorological condition
; Observational analysis
; Precipitable water vapor
; Seasonal variation
; SGP site
; Southern great plains
; Aerosols
; black carbon
; organic matter
; sodium chloride
; sulfate
; aerosol
; aerosol property
; cloud
; cloud droplet
; diameter
; ground-based measurement
; optical depth
; precipitable water
; seasonal variation
; site investigation
; aerosol
; Article
; chemical composition
; cloud
; dust
; meteorology
; observational study
; priority journal
; seasonal variation
; spring
; summer
; troposphere
; water supply
; water vapor
; wind
; winter
; Great Plains
; Oklahoma [United States]
; United States
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Previous studies have shown the negative or positive relationship between cloud droplet effective radius (re) and aerosol amount based on limited observations, indicative of the uncertainties of this relationship caused by many factors. Using 8-year ground-based cloud and aerosol observations at Southern Great Plain (SGP) site in Oklahoma, US, we here analyze the seasonal variation of aerosol effect on low liquid cloud re. It shows positive instead of negative AOD- re relationship in all seasons except summer. Potential contribution to AOD- re relationship from the precipitable water vapor (PWV) has been analyzed. Results show that the AOD- re relationship is indeed negative in low PWV condition regardless of seasonality, but it turns positive in high PWV condition for all seasons other than summer. The most likely explanation for the positive AOD-re relationship in high PWV condition for spring, fall and winter is that high PWV could promote the growth of cloud droplets by providing sufficient water vapor. The different performance of AOD- re relationship in summer could be related to the much heavier aerosol loading, which makes the PWV not sufficient any more so that the droplets compete water with each other. By limiting the variation of other meteorological conditions such as low tropospheric stability and wind speed near cloud bases, further analysis shows that higher PWVs not only help change AOD- re relationship from negative to positive, but also make cloud depth and cloud top height higher. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82829
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing, China; Joint Center for Global Change Studies, Beijing Normal University, Beijing, China; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmosphere Sciences, Lanzhou University, Lanzhou, China
Recommended Citation:
Qiu Y,, Zhao C,, Guo J,et al. 8-Year ground-based observational analysis about the seasonal variation of the aerosol-cloud droplet effective radius relationship at SGP site[J]. Atmospheric Environment,2017-01-01,164