Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2018.07.018 |
CCN activation properties at a tropical hill station in Western Ghats during south-west summer monsoon: Vertical heterogeneity | |
Jayachandran, V; Nair, Vijayakumar S.; Babu, S. Suresh | |
2018-12-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 214页码:36-45 |
文章类型 | Article |
语种 | 英语 |
国家 | India |
英文摘要 | Cloud Condensation Nuclei (CCN) concentrations, aerosol number concentrations larger than about 3 nm (CN), and aerosol scattering and absorption coefficient measurements carried out at a hill station (Ponmudi, 8.8 degrees N, 77.1 degrees E, similar to 960 m amsl) located on Western Ghats and at a nearby coastal location (Thumba, 8.5 degrees N, 76.9 degrees E, similar to 3 m amsl) in the peninsular India during summer monsoon period are used to investigate the vertical heterogeneity in the activation properties and its association with the aerosol optical properties. CCN concentration over the hill station depicted high values during daytime and low values during nighttime, whereas an opposite pattern in CCN is observed over the coastal site. The intrinsic properties like CCN activation fraction and Twomey's empirical fit (k value) show insignificant diurnal variation over the hill station in contrast to the coastal location where the land-sea breeze circulation modify the prevailing airmasses over the sampling site. The percentage of CN acting as CCN at 0.4% supersaturation is about 25% at Ponmudi and is about 46% at Thumba. The higher scattering angstrom exponent observed at Ponmudi indicates the consistent presence of fine mode particles. CCN concentration at both Ponmudi and Thumba show a good linear correlation with scattering aerosol index. The association between CCN number concentrations and BC mass concentrations suggest that carbonaceous combustion sources influence CCN at Ponmudi. Even though marine airmass prevails over both locations due to the onset of the summer monsoon, CCN activation properties are distinct at the mean sea level and at an altitude of 1 km above the coastal region. |
英文关键词 | Cloud condensation nuclei CCN activation fraction Aerosol optical properties Vertical heterogeneity |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445990400004 |
WOS关键词 | CLOUD CONDENSATION NUCLEI ; SIZE DISTRIBUTIONS ; AEROSOL-PARTICLES ; LIGHT-ABSORPTION ; ORGANIC-MATTER ; SOOT PARTICLES ; CARBON ; GROWTH ; BLACK ; WATER |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/38508 |
专题 | 地球科学 |
作者单位 | Vila can Sarabhai Space Ctr, Space Phys Lab, Thiruvananthapuram, Kerala, India |
推荐引用方式 GB/T 7714 | Jayachandran, V,Nair, Vijayakumar S.,Babu, S. Suresh. CCN activation properties at a tropical hill station in Western Ghats during south-west summer monsoon: Vertical heterogeneity[J]. ATMOSPHERIC RESEARCH,2018,214:36-45. |
APA | Jayachandran, V,Nair, Vijayakumar S.,&Babu, S. Suresh.(2018).CCN activation properties at a tropical hill station in Western Ghats during south-west summer monsoon: Vertical heterogeneity.ATMOSPHERIC RESEARCH,214,36-45. |
MLA | Jayachandran, V,et al."CCN activation properties at a tropical hill station in Western Ghats during south-west summer monsoon: Vertical heterogeneity".ATMOSPHERIC RESEARCH 214(2018):36-45. |
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