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DOI	10.1016/j.atmosenv.2021.118457
	Vertical distributions and columnar properties of the aerosols during different seasons over Kattankulathur (12.82oN, 80.04oE): A semi-urban tropical coastal station
	Ananthavel A.; Mehta S.K.; Reddy T.V.R.; Ali S.; Rao D.N.
发表日期	2021
ISSN	1352-2310
卷号	256
英文摘要	Seasonal characteristics of the aerosols over Kattankulathur (12.83° N, 80.04° E) is studied using Micro Pulse Lidar observations during 2016–2018 and Cloud Aerosol Lidar and Infrared Pathfinder Satellite Observation, Moderate Resolution Imaging Spectroradiometer and Ozone Monitoring Instrument datasets during 2006–2018. The vertical distribution of the aerosols is characterized as the steep decrease with altitude nearly exponentially up to 2–3 km during the northeast (NE) monsoon and winter seasons mainly dominated by clear marine and polluted continental aerosols. While it gradually decreases with altitude up to 4–5 km during pre-monsoon and southwest monsoon (SW) seasons mainly dominated by dust aerosols. The mean aerosol loadings near the surface are ~0.38 km−1 during NE monsoon and winter, ~0.30 km−1 pre-monsoon, and 0.22 km−1 during SW monsoon seasons. Such difference in the seasonal distribution of aerosol loading is mainly attributed to the difference in surface insolation, convection, long-range transport, and the atmospheric boundary layer (ABL) structure and dynamics. The ABL contributes 61%, 46%, 38%, and 63% of the overall aerosol optical depth (AOD) during the winter, pre-monsoon, SW monsoon, and NE monsoon seasons, respectively. The AOD shows a substantial seasonal variation with two local maxima during May and October and minima during January and July. The maximum and minimum AOD is found to be ~0.59 ± 0.16 and 0.4 ± 0.05, respectively. The Angstrom exponent (AE) (fine mode fraction (FMF)) shows a marked seasonal variation with a maximum value of 0.84 (0.60), indicating the dominance of finer particles during winter and minimum value of 0.54 (0.27), indicating dominance coarse particles during SW monsoon. The AE and UV aerosol index values suggest that Kattankulathur is mainly characterized by large-sized absorbing aerosols (30%) such as dust mixture and sea salt particles. Small-sized non-absorbing aerosols such as biogenic aerosols are rarely (<1%) observed. © 2021 Elsevier Ltd
关键词	Aerosols Lidar North-east monsoon region Pollution
语种	英语
scopus关键词	Air pollution; Atmospheric aerosols; Atmospheric boundary layer; Dust; Optical radar; Radiometers; Tropics; Aerosol loading; Aerosol optical depths; Angstrom exponent; Monsoon season; North-east monsoon region; Northeast monsoon; Pre-monsoon; Seasonal variation; Southwest monsoon; Vertical distributions; Atmospheric thermodynamics; ozone; sodium chloride; aerosol; boundary layer; data set; instrumentation; lidar; MODIS; optical depth; sea salt; seasonal variation; tropical environment; vertical distribution; aerosol; Article; boundary layer; India; infrared radiation; optical depth; priority journal; rainy season; seashore; seasonal variation; suburban area; sunlight; thermodynamics; winter
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248400
作者单位	Research Institute, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India; SRM University, Amaravati, Andhra Pradesh 522502, India
推荐引用方式 GB/T 7714	Ananthavel A.,Mehta S.K.,Reddy T.V.R.,et al. Vertical distributions and columnar properties of the aerosols during different seasons over Kattankulathur (12.82oN, 80.04oE): A semi-urban tropical coastal station[J],2021,256.
APA	Ananthavel A.,Mehta S.K.,Reddy T.V.R.,Ali S.,&Rao D.N..(2021).Vertical distributions and columnar properties of the aerosols during different seasons over Kattankulathur (12.82oN, 80.04oE): A semi-urban tropical coastal station.ATMOSPHERIC ENVIRONMENT,256.
MLA	Ananthavel A.,et al."Vertical distributions and columnar properties of the aerosols during different seasons over Kattankulathur (12.82oN, 80.04oE): A semi-urban tropical coastal station".ATMOSPHERIC ENVIRONMENT 256(2021).