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DOI	10.5194/acp-22-4491-2022
	Observations of particle number size distributions and new particle formation in six Indian locations
	Sebastian, Mathew; Kompalli, Sobhan Kumar; Kumar, Vasudevan Anil; Jose, Sandhya; Babu, S. Suresh; Pandithurai, Govindan; Singh, Sachchidanand; Hooda, Rakesh K.; Soni, Vijay K.; Pierce, Jeffrey R.; Vakkari, Ville; Asmi, Eija; Westervelt, Daniel M.; Hyvarinen, Antti-Pekka; Kanawade, Vijay P.
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	4491
结束页码	4508
卷号	22 期号:7 页码:18
英文摘要	Atmospheric new particle formation (NPF) is a crucial process driving aerosol number concentrations in the atmosphere; it can significantly impact the evolution of atmospheric aerosol and cloud processes. This study analyses at least 1 year of asynchronous particle number size distributions from six different locations in India. We also analyze the frequency of NPF and its contribution to cloud condensation nuclei (CCN) concentrations. We found that the NPF frequency has a considerable seasonal variability. At the measurement sites analyzed in this study, NPF frequently occurs in March-May (pre-monsoon, about 21 % of the days) and is the least common in October-November (post-monsoon, about 7 % of the days). Considering the NPF events in all locations, the particle formation rate (J(SDS)) varied by more than 2 orders of magnitude (0.001-0.6 cm(-3) s(-1)) and the growth rate between the smallest detectable size and 25 nm (GR(SDS-25 nm)) by about 3 orders of magnitude (0.2-17.2 nm h(-1)). We found that J(SDS) was higher by nearly 1 order of magnitude during NPF events in urban areas than mountain sites. GR(SDS) did not show a systematic difference. Our results showed that NPF events could significantly modulate the shape of particle number size distributions and CCN concentrations in India. The contribution of a given NPF event to CCN concentrations was the highest in urban locations (4.3 x 10(3) cm(-3) per event and 1.2 x 10(3) cm(-3) per event for 50 and 100 nm, respectively) as compared to mountain background sites (2.7 x 10(3) cm(-3) per event and 1.0 x 10(3) cm(-3) per event, respectively). We emphasize that the physical and chemical pathways responsible for NPF and factors that control its contribution to CCN production require in situ field observations using recent advances in aerosol and its precursor gaseous measurement techniques.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000778882200001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273827
作者单位	University of Hyderabad; Department of Space (DoS), Government of India; Indian Space Research Organisation (ISRO); Vikram Sarabhai Space Center (VSSC); Ministry of Earth Sciences (MoES) - India; Indian Institute of Tropical Meteorology (IITM); Council of Scientific & Industrial Research (CSIR) - India; CSIR - National Physical Laboratory (NPL); Academy of Scientific & Innovative Research (AcSIR); Finnish Meteorological Institute; Ministry of Earth Sciences (MoES) - India; India Meteorological Department (IMD); Colorado State University; North West University - South Africa; Columbia University; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center
推荐引用方式 GB/T 7714	Sebastian, Mathew,Kompalli, Sobhan Kumar,Kumar, Vasudevan Anil,et al. Observations of particle number size distributions and new particle formation in six Indian locations[J],2022,22(7):18.
APA	Sebastian, Mathew.,Kompalli, Sobhan Kumar.,Kumar, Vasudevan Anil.,Jose, Sandhya.,Babu, S. Suresh.,...&Kanawade, Vijay P..(2022).Observations of particle number size distributions and new particle formation in six Indian locations.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(7),18.
MLA	Sebastian, Mathew,et al."Observations of particle number size distributions and new particle formation in six Indian locations".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.7(2022):18.