DOI: 10.1016/j.atmosenv.2017.06.012
Scopus记录号: 2-s2.0-85020828594
论文题名: CCN characteristics over a tropical coastal station during south-west monsoon: observations and closure studies
作者: Jayachandran V ; , Nair V ; S ; , Babu S ; S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 164 起始页码: 299
结束页码: 308
语种: 英语
英文关键词: Activation ratio
; Aerosol-cloud interaction
; CCN prediction
; Cloud condensation nuclei
Scopus关键词: Atmospheric thermodynamics
; Chemical activation
; Coastal engineering
; Condensation
; Supersaturation
; Aerosol number size distribution
; Aerosol-cloud interaction
; Cloud condensation nuclei
; Coastal environments
; Interannual variation
; Mesoscale circulation
; Number concentration
; Simultaneous measurement
; Aerosols
; ammonium sulfate
; activation energy
; cloud condensation nucleus
; coastal zone
; concentration (composition)
; diurnal variation
; monsoon
; observational method
; saturation
; tropical region
; volcanic cloud
; weather station
; aerosol
; Article
; cloud
; cloud condensation nuclei
; coastal waters
; India
; priority journal
; sea
; summer
; West Asian
; wind
; India
; Kerala
; Thiruvananthapuram
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: Number concentration measurements of cloud condensation nuclei (CCN) at five supersaturation values between 0.2 and 1.0% were made from a coastal site (Thiruvananthapuram) of peninsular India using a single column CCN counter during the summer monsoon period (June–September) of 2013 and 2014. The CCN concentration over this site showed diurnal variations of high values during nighttime and low values during daytime in association with the change in mesoscale circulation patterns. The inter-annual variations of CCN (CCN0.4% = 2,232 ± 672 cm−3 during August 2013 and CCN0.4% = 941 ± 325 cm−3 during August 2014) are mostly associated with the varying intensity of monsoon rainfall. The variation of CCN number concentration with supersaturation is found to be steeper during nighttime (indicating a less CCN active aerosol system) than during daytime (CCN active system). The CCN activation ratio estimated using simultaneous measurements of CCN and aerosol number (CN) concentration clearly depict the role of land-sea breeze circulations with higher values during daytime than the nighttime. The CCN number concentration predicted for different supersaturations, from measured aerosol number size distribution using Kohler theory, indicate the importance of the change in aerosol composition associated with different airmasses in a coastal environment. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82361
Appears in Collections: 气候变化事实与影响
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作者单位: Space Physics Laboratory, Vikram Sarabhai Space Centre, Thiruvananthapuram, India
Recommended Citation:
Jayachandran V,, Nair V,S,et al. CCN characteristics over a tropical coastal station during south-west monsoon: observations and closure studies[J]. Atmospheric Environment,2017-01-01,164