| DOI: | 10.1016/j.atmosenv.2013.12.016
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| Scopus记录号: | 2-s2.0-84891904750
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| 论文题名: | Inter-seasonal variability in size-resolved CCN properties at Kanpur, India |
| 作者: | Bhattu D; , Tripathi S; N
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| 刊名: | Atmospheric Environment
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| ISSN: | 0168-2563
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| EISSN: | 1573-515X
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| 出版年: | 2014
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| 卷: | 85 | | 起始页码: | 161
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| 结束页码: | 168
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| 语种: | 英语
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| 英文关键词: | Accumulation mode
; Activation
; Aitken mode
; Cloud condensation nuclei
; Hygroscopicity
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| Scopus关键词: | Accumulation modes
; Activation fraction
; Aitken mode
; Chemical compositions
; Cloud condensation nuclei
; Hygroscopicity
; Indo-Gangetic basin
; Photochemical activity
; Chemical activation
; Condensation
; Atmospheric thermodynamics
; activation energy
; Aitken nucleus
; chemical composition
; cloud condensation nucleus
; hygroscopicity
; photochemistry
; seasonal variation
; size distribution
; supersaturation
; aerosol
; article
; chemical composition
; cloud
; cloud condensation nuclei
; dissolution
; India
; measurement
; meteorological phenomena
; meteorology
; particle size
; photochemistry
; prediction
; priority journal
; season
; seasonal variation
; secondary organic aerosol
; species
; spring
; summer
; wettability
; Gangetic Plain
; India
; Kanpur
; Uttar Pradesh
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| Scopus学科分类: | Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
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| 英文摘要: | We present properties of size-resolved cloud condensation nuclei (CCN) over the central Indo-Gangetic Basin (IGB) station, Kanpur, India. The measurements were done during three different seasons: spring, summer and monsoon in 2012. Size-resolved CCN efficiency spectra (20-280nm), measured at 0.2-1% supersaturation (SS), resulted in an average activation diameter (Da) of 148-45nm. The activation diameter was found to be maximum in spring followed by monsoon and summer at all SS except at SS=1%. The size-averaged hygroscopicity (κ) of CCN-active particles for all SS was found to be 0.11±0.03, 0.24±0.13 and 0.14±0.06 in spring, summer, and monsoon, respectively. κ increased with increasing particle diameter, suggesting change in chemical composition with size which further leads to change in CCN activity. In comparison to summer and monsoon, despite the presence of lower κ in spring, the higher activation fraction in Aitken mode is observed due to the shift of CN size distribution towards larger diameter. κ is observed to be lower in first half of the day (0900-1400h) for SS=0.2-0.5% due to relatively less photochemical activity compared to second half of the day. Size-and-time averaged κ value over all three seasons (0.16±0.08) suggests dominance of organic species, as reported in previous studies. © 2013 Elsevier Ltd. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/80771
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Department of Civil Engineering, Indian Institute of Technology Kanpur, Uttar Pradesh 208016, India
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| Recommended Citation: | |
Bhattu D,, Tripathi S,N. Inter-seasonal variability in size-resolved CCN properties at Kanpur, India[J]. Atmospheric Environment,2014-01-01,85
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