气候变化领域集成服务门户(CCPortal): Cloud condensation nuclei properties of South Asian outflow over the northern Indian Ocean during winter

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DOI	10.5194/acp-20-3135-2020
	Cloud condensation nuclei properties of South Asian outflow over the northern Indian Ocean during winter
	Nair V.S.; Nair Jayachandran V.; Kumar Kompalli S.; Gogoi M.; Suresh Babu S.
发表日期	2020
ISSN	16807316
起始页码	3135
结束页码	3149
卷号	20 期号:5
英文摘要	Extensive measurements of cloud condensation nuclei (CCN) and condensation nuclei (CN) concentrations in the South Asian outflow to the northern Indian Ocean were carried out on board an instrumented research vessel, as part of the Integrated Campaign for Aerosols, gases and Radiation Budget (ICARB) during the winter season (January- February 2018). Measurements include a north-south transect across the South Asian plume over the northern Indian Ocean and an east-west transect over the equatorial Indian Ocean ( 2 S), which is far away from the continental sources. South Asian outflow over the northern Indian Ocean is characterized by the high values of CCN number concentration ( 5000 cm-3), low CCN activation efficiency ( 25 %) and a steep increase in CCN concentration with the increase in supersaturation. In contrast, low CCN oncentration ( 1000 cm-3) with flat supersaturation spectra was found over the equatorial Indian Ocean. The CCN properties exhibited significant dependence on the geometric mean diameter (GMD) of the aerosol number size distribution, and CCN activation efficiency decreased to low values <20 %) at the time of new-particle formation events over near-coastal and remote oceanic regions. The analysis of the activation efficiencies for the similar aerosol size distributions over the northern Indian Ocean indicated the primary role of aerosol number size distribution on CCN activation efficiency. The dependence of CCN properties and activation efficiency on size-segregated aerosol number concentration, especially during the ultrafine (< 100 nm) particle events, is investigated in detail for the first time over the region. © 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
关键词	aerosol cloud condensation nucleus concentration (composition)efficiency measurement outflow radiation budget size distribution supersaturation winter Indian Ocean Indian Ocean (Equatorial)Indian Ocean (North)South Asia
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132166
推荐引用方式 GB/T 7714	Nair V.S.,Nair Jayachandran V.,Kumar Kompalli S.,et al. Cloud condensation nuclei properties of South Asian outflow over the northern Indian Ocean during winter[J]. Atmospheric Chemistry and Physics,2020,20(5).
APA	Nair V.S.,Nair Jayachandran V.,Kumar Kompalli S.,Gogoi M.,&Suresh Babu S..(2020).Cloud condensation nuclei properties of South Asian outflow over the northern Indian Ocean during winter.,20(5).
MLA	Nair V.S.,et al."Cloud condensation nuclei properties of South Asian outflow over the northern Indian Ocean during winter".20.5(2020).