Impact of lockdown due to COVID-19 outbreak on O3 and its precursor gases, PM and BC over northeast India

Binita Pathak; Pradip Kumar Bhuyan; Arshini Saikia; Kalyan Bhuyan; P. Ajay; Sankar Jyoti Nath; Shyam Lochan Bora

doi:10.18520/cs/v120/i2/322-331

Impact of lockdown due to COVID-19 outbreak on O3 and its precursor gases, PM and BC over northeast India

Binita Pathak, Pradip Kumar Bhuyan, Arshini Saikia, Kalyan Bhuyan, P. Ajay, Sankar Jyoti Nath, Shyam Lochan Bora

ACOM Modeling

Dibrugarh University

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Copernicus Atmosphere Monitoring Service (CAMS) data are used to evaluate the impact of the lockdown (24 March–3 May 2020) on the concentrations of surface O₃, NO_x, CO, SO₂, PM and BC compared to those measured during the same period in 2015–2019 over northeast India and adjoining areas. Measurements made at Dibrugarh complements the CAMS observations. The NO_x, NO₂, CO, SO₂, BC and PM concentrations dipped appreciably over northeast India and nearby countries. Similar decrement is observed in Dibrugarh in 2020 over their reference levels. Reduction of precursor gases triggered an increase in O3 concentration across northeast India and adjoining South Asia and at Dibrugarh. The air quality over the region improved from moderate to satisfactory levels due to the lockdown.

Original language	English
Pages (from-to)	322-331
Number of pages	10
Journal	Current Science
Volume	120
Issue number	2
DOIs	https://doi.org/10.18520/cs/v120/i2/322-331
State	Published - Jan 2021

Keywords

Aerosols
air quality
COVID-19
lockdown
northeast India
particulate matter
trace gases

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10.18520/cs/v120/i2/322-331

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title = "Impact of lockdown due to COVID-19 outbreak on O3 and its precursor gases, PM and BC over northeast India",

abstract = "Copernicus Atmosphere Monitoring Service (CAMS) data are used to evaluate the impact of the lockdown (24 March–3 May 2020) on the concentrations of surface O3, NOx, CO, SO2, PM and BC compared to those measured during the same period in 2015–2019 over northeast India and adjoining areas. Measurements made at Dibrugarh complements the CAMS observations. The NOx, NO2, CO, SO2, BC and PM concentrations dipped appreciably over northeast India and nearby countries. Similar decrement is observed in Dibrugarh in 2020 over their reference levels. Reduction of precursor gases triggered an increase in O3 concentration across northeast India and adjoining South Asia and at Dibrugarh. The air quality over the region improved from moderate to satisfactory levels due to the lockdown.",

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author = "Binita Pathak and Bhuyan, \{Pradip Kumar\} and Arshini Saikia and Kalyan Bhuyan and P. Ajay and Nath, \{Sankar Jyoti\} and Bora, \{Shyam Lochan\}",

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doi = "10.18520/cs/v120/i2/322-331",

language = "English",

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pages = "322--331",

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T1 - Impact of lockdown due to COVID-19 outbreak on O3 and its precursor gases, PM and BC over northeast India

AU - Pathak, Binita

AU - Bhuyan, Pradip Kumar

AU - Saikia, Arshini

AU - Bhuyan, Kalyan

AU - Ajay, P.

AU - Nath, Sankar Jyoti

AU - Bora, Shyam Lochan

PY - 2021/1

Y1 - 2021/1

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AB - Copernicus Atmosphere Monitoring Service (CAMS) data are used to evaluate the impact of the lockdown (24 March–3 May 2020) on the concentrations of surface O3, NOx, CO, SO2, PM and BC compared to those measured during the same period in 2015–2019 over northeast India and adjoining areas. Measurements made at Dibrugarh complements the CAMS observations. The NOx, NO2, CO, SO2, BC and PM concentrations dipped appreciably over northeast India and nearby countries. Similar decrement is observed in Dibrugarh in 2020 over their reference levels. Reduction of precursor gases triggered an increase in O3 concentration across northeast India and adjoining South Asia and at Dibrugarh. The air quality over the region improved from moderate to satisfactory levels due to the lockdown.

KW - Aerosols

KW - air quality

KW - COVID-19

KW - lockdown

KW - northeast India

KW - particulate matter

KW - trace gases

UR - https://www.scopus.com/pages/publications/85102113799

U2 - 10.18520/cs/v120/i2/322-331

DO - 10.18520/cs/v120/i2/322-331

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SN - 0011-3891

VL - 120

SP - 322

EP - 331

JO - Current Science

JF - Current Science

IS - 2

ER -

Impact of lockdown due to COVID-19 outbreak on O3 and its precursor gases, PM and BC over northeast India

Abstract

Keywords

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