干旱区生态环境知识资源中心(Arid): Impact of aerosols on surface ozone during COVID-19 pandemic in southern India: A multi-instrumental approach from ground and satellite observations, and model simulations

Arid

DOI	10.1016/j.jastp.2020.105491
	Impact of aerosols on surface ozone during COVID-19 pandemic in southern India: A multi-instrumental approach from ground and satellite observations, and model simulations
	Kalluri, Raja Obul Reddy; Gugamsetty, Balakrishnaiah; Tandule, Chakradhar Rao; Kotalo, Rama Gopal; Thotli, Lokeswara Reddy; Rajuru, Ramakrishna Reddy; Palle, Surya Nagi Reddy
通讯作者	Kotalo, RG (corresponding author), Sri Krishnadevaraya Univ, Dept Phys, Aerosol & Atmospher Res Lab, Anantapur 515003, Andhra Pradesh, India.
来源期刊	JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
ISSN	1364-6826
EISSN	1879-1824
出版年	2021
卷号	212
英文摘要	The World Health Organization (WHO) declared the coronavirus disease of 2019 (COVID-19) as a pandemic due to its widespread global infection. This has resulted in lockdown under different phases in many nations, including India, around the globe. In the present study, we report the impact of aerosols on surface ozone in the context of pre-lockdown (01st - 24th March 2020 (PLD)), lockdown phasel (25th March to 14th April 2020 (LDP1)), and lockdown phase 2 (15th April to O-3 rd May 2020 (LDP2)) on clear days at a semi-arid site, Anantapur in southern India using both in situ observations and model simulations. Collocated measurements of surface ozone (O-3), aerosol optical depth (AOD), black carbon mass concentration (BC), total columnar ozone (TCO), solar radiation (SR), and ultraviolet radiation (UV-A) data were collected using an Ozone analyzer, MICROTOPS sunphotometer, Ozonometer, Aethalometer, and net radiometer during the study period. The diurnal variations of O-3 and BC exhibited an opposite trend during three phases. The concentrations of ozone were -10.7% higher during LDP1 (44.8 +/- 5.2 ppbv) than the PLD (40.5 +/- 6.0 ppbv), which mainly due to an unprecedented reduction in NOx emissions leading to a lower O-3 titration by NO. The prominent increase in the surface zone during LDP1 is reasonably consistent with the observed photolysis frequencies (j ((OD)-D-1)) through Tropospheric Ultraviolet and Visible (TUV) model. The results show that a pronounced spectral and temporal variability in the AOD during three lockdown phases is mainly due to distinct aerosol sources. The increase in AOD during LDP2 due to longrange transport can bring large amounts of mineral dust and smoke aerosols from the west Asian region and central India, and which is reasonably consistent with the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) air mass back trajectories and Moderate Resolution Imaging Spectroradiometer (MODIS) fire counts analysis over the measurement location. Overall, a drastic reduction in BC concentration (similar to 8.4%) and AOD (10.8%) were observed in the semi-arid area during LDP1 with correspondence to PLD. The columnar aerosol size distributions retrieved from the spectral AODs followed power-law plus unimodal during three phases. The absorption angstrom exponent (AAE) analysis reveals a predominant contribution to the BC from biomass burning activities during the lockdown period over the measurement location.
英文关键词	Surface ozone Aerosol optical depth HYSPLIT Semi-arid
类型	Article
语种	英语
开放获取类型	Bronze, Green Published
收录类别	SCI-E
WOS记录号	WOS:000609029900007
WOS关键词	OPTICAL-PROPERTIES ; SEMIARID REGION ; BLACK CARBON ; ATMOSPHERIC AEROSOLS ; TROPICAL URBAN ; AIR-QUALITY ; IN-SITU ; ABSORPTION ; ANANTAPUR ; AETHALOMETER
WOS类目	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS研究方向	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347983
作者单位	[Kalluri, Raja Obul Reddy; Gugamsetty, Balakrishnaiah; Tandule, Chakradhar Rao; Kotalo, Rama Gopal; Thotli, Lokeswara Reddy; Rajuru, Ramakrishna Reddy; Palle, Surya Nagi Reddy] Sri Krishnadevaraya Univ, Dept Phys, Aerosol & Atmospher Res Lab, Anantapur 515003, Andhra Pradesh, India
推荐引用方式 GB/T 7714	Kalluri, Raja Obul Reddy,Gugamsetty, Balakrishnaiah,Tandule, Chakradhar Rao,et al. Impact of aerosols on surface ozone during COVID-19 pandemic in southern India: A multi-instrumental approach from ground and satellite observations, and model simulations[J],2021,212.
APA	Kalluri, Raja Obul Reddy.,Gugamsetty, Balakrishnaiah.,Tandule, Chakradhar Rao.,Kotalo, Rama Gopal.,Thotli, Lokeswara Reddy.,...&Palle, Surya Nagi Reddy.(2021).Impact of aerosols on surface ozone during COVID-19 pandemic in southern India: A multi-instrumental approach from ground and satellite observations, and model simulations.JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS,212.
MLA	Kalluri, Raja Obul Reddy,et al."Impact of aerosols on surface ozone during COVID-19 pandemic in southern India: A multi-instrumental approach from ground and satellite observations, and model simulations".JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS 212(2021).