scholarly journals Air Quality Status in Wuhan City during and One Year after the COVID-19 Lockdown

2022 ◽  
Vol 22 ◽  
pp. 210282
Author(s):  
Crystal Jane Ethan ◽  
Kingsley Katleho Mokoena ◽  
Yan Yu
Keyword(s):  
Air Quality ◽  
Wuhan City ◽  
One Year ◽  
Quality Status

scholarly journals COVID-19 national lockdown in Morocco: impacts on air quality and public health

2020 ◽  
Author(s):  
Kenza Khomsi ◽  
Houda Najmi ◽  
Hassan Amghar ◽  
Youssef Chelhaoui ◽  
Zineb Souhaili
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Anthropogenic Activities ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Pollution Reduction ◽  
Industrial Activities ◽  
Large Cities ◽  
Almost All ◽  
Quality Status

AbstractOn the 20th April 2020, the end date of the first strict lockdown period in Morocco, 2 403 410 cases of the corona Virus were confirmed globally. The number of Morocco confirmed cases attended 2990, while 12 746 were suspected and 143 deaths were recorded. Due to the pandemic of coronavirus disease 2019 worldwide and in Morocco, almost all avoidable activities in the country were prohibited since the kingdom announced activities reduction on March 16, 2020 and then general lockdown with reduced industrial activities on March 20, 2020.This study aims at comparing the air quality status in Casablanca and Marrakech, two large cities from Morocco, before the pandemic and during the lockdown situation to show whether COVID-19 compelled-anthropogenic activities lockdown may have saved lives by restraining ambient air pollution than by preventing infection.We found that, during the quarantine, NO2 dropped by -12 μg/m3 in Casablanca and -7 μg/m3 in Marrakech. PM2·5 dropped by -18 μg/m3 in Casablanca and -14 μg/m3 in Marrakech. CO dropped by -0.04 mg/m3 in Casablanca and -0.12 mg/m3 in Marrakech. This air pollution reduction had created human health benefits and had reduced mortality and saved lives mainly from cardiovascular diseases.

scholarly journals Influences of boundary layer phenomena and meteorology on ambient air quality status of an urban area in eastern India

Atmósfera ◽  
2018 ◽  
Vol 31 (1) ◽  
pp. 69-86 ◽  
Author(s):  
Sharadia Dey ◽  
◽  
Srimanta Gupta ◽  
Arun Chakraborty ◽  
Precious Sibanda ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Air Quality ◽  
Urban Area ◽  
Ambient Air ◽  
Eastern India ◽  
Ambient Air Quality ◽  
Quality Status

scholarly journals Low-Cost Air Quality Sensors: One-Year Field Comparative Measurement of Different Gas Sensors and Particle Counters with Reference Monitors at Tušimice Observatory

Atmosphere ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 492 ◽  
Author(s):  
Petra Bauerová ◽  
Adriana Šindelářová ◽  
Štěpán Rychlík ◽  
Zbyněk Novák ◽  
Josef Keder
Keyword(s):  
Air Quality ◽  
Gas Sensors ◽  
Low Cost ◽  
Monitoring Network ◽  
Field Testing ◽  
Ambient Air ◽  
Monitoring Networks ◽  
Comparative Measurement ◽  
One Year ◽  
Pm2.5 And Pm10

With attention increasing regarding the level of air pollution in different metropolitan and industrial areas worldwide, interest in expanding the monitoring networks by low-cost air quality sensors is also increasing. Although the role of these small and affordable sensors is rather supplementary, determination of the measurement uncertainty is one of the main questions of their applicability because there is no certificate for quality assurance of these non-reference technologies. This paper presents the results of almost one-year field testing measurements, when the data from different low-cost sensors (for SO2, NO2, O3, and CO: Cairclip, Envea, FR; for PM1, PM2.5, and PM10: PMS7003, Plantower, CHN, and OPC-N2, Alphasense, UK) were compared with co-located reference monitors used within the Czech national ambient air quality monitoring network. The results showed that in addition to the given reduced measurement accuracy of the sensors, the data quality depends on the early detection of defective units and changes caused by the effect of meteorological conditions (effect of air temperature and humidity on gas sensors and effect of air humidity with condensation conditions on particle counters), or by the interference of different pollutants (especially in gas sensors). Comparative measurement is necessary prior to each sensor’s field applications.

Air Quality Status of Visakhapatnam (India) – Indices Basis

2004 ◽  
Vol 95 (1-3) ◽  
pp. 1-12 ◽  
Author(s):  
M. K. Reddy ◽  
K. G. Rama Rao ◽  
I. Rammohan Rao
Keyword(s):  
Air Quality ◽  
Quality Status

Air Quality Status During Diwali Festival of India: A Case Study

2012 ◽  
Vol 89 (2) ◽  
pp. 376-379 ◽  
Author(s):  
Padma S. Rao ◽  
D. G. Gajghate ◽  
A. G. Gavane ◽  
P. Suryawanshi ◽  
C. Chauhan ◽  
...  
Keyword(s):  
Air Quality ◽  
Diwali Festival ◽  
Quality Status

Analysis of Ambient Air Quality Status and Trends from 2010 to 2012 in Chengkou County of Chongqing City in China

2013 ◽  
Vol 726-731 ◽  
pp. 1427-1430
Author(s):  
Wen Hua Jiang ◽  
Dao Jin Chen ◽  
Xian Qiong Long
Keyword(s):  
Air Quality ◽  
Southwest China ◽  
Ambient Air ◽  
Quality Monitoring ◽  
Air Quality Monitoring ◽  
Ambient Air Quality ◽  
Monthly Average ◽  
Chongqing City ◽  
Quality Status

The air quality monitoring data from 2010 to 2012 in Chengkou County of Chongqing City in Southwest China was analyzed.The results show that in recent years the air pollutans affecting the air quality in Chengkou County mainly is PM10 and secondly is SO2. The monthly average concentrations of PM10 and SO2 show a U-shape trend with the highest values in January.The average concentrations of PM10 and SO2 are highest in winter and lowest in summer with obvious seasonal changes.The air quality of Chengkou in 2011 and 2011 has been somewhat improved compared with that in 2010.

scholarly journals Nudging technique for scale bridging in air quality/climate atmospheric composition modelling

2011 ◽  
Vol 11 (6) ◽  
pp. 17177-17199 ◽  
Author(s):  
A. Maurizi ◽  
F. Russo ◽  
M. D'Isidoro ◽  
F. Tampieri
Keyword(s):  
Air Quality ◽  
High Resolution ◽  
Hot Spot ◽  
Atmospheric Composition ◽  
Low Resolution ◽  
Po Valley ◽  
Critical Areas ◽  
Model Response ◽  
Wide Range ◽  
One Year

Abstract. The interaction between air quality and climate involves dynamical scales that cover an immensely wide range. Bridging these scales in numerical simulations is fundamental in studies devoted to megacity/hot-spot impacts on climate. The nudging technique is proposed as a bridging method that can couple different models at different scales. Here, nudging is used to force low resolution chemical composition models using a high resolution run on critical areas. A one-year numerical experiment focused on the Po Valley hot spot is performed using the BOLCHEM model to asses the method. The results show that the model response is stable to perturbation induced by the nudging and that, if a high resolution run is taken as a reference, there is an increase in model skills of low resolution run when the technique is applied. This improvement depends on the species and the season. The effect spreads outside the forcing area and remains noticeable over an extension about 9 times larger.

scholarly journals AMBIENT AIR QUALITY STATUS OF DEWAS INDUSTRIAL AREA OF MADHYA PRADESH, INDIA

2020 ◽  
pp. 4-12
Author(s):  
Reeta Kori ◽  
Alok Saxena ◽  
Harish Wankhade ◽  
Asad Baig ◽  
Ankita Kulshreshtha ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Quality Index ◽  
Ambient Air ◽  
Industrial Area ◽  
Madhya Pradesh ◽  
Air Quality Index ◽  
Particulate Phase ◽  
Ambient Air Quality ◽  
Quality Status

A study has been conducted to assess the ambient air quality status of Dewas industrial area of Madhya Pradesh, India. Total nine locations were selected in Dewas industrial area for ambient air quality monitoring. The eleven pollutants mainly particulate matter less than 10 µ size (PM10), particulate matter less than 2.5 µ size (PM2.5), nitrogen dioxide (NO2), sulphur dioxide (SO2), ozone (O3), ammonia (NH3), benzene (C6H6), benzo (a) Pyrene (BaP) – particulate phase, lead (Pb), Arsenic (As) and Nickel (Ni) were monitored during different four quarters from April 2019 to March 2020. The study revealed that average concentration of gaseous pollutants viz, NO2, SO2, O3, NH3, C6H6 in ambient air were well within standard limits at all selected locations, however concentration of particulate matter (PM10, PM2.5) and heavy metals (Pb & Ni) except As level were found exceeding the National Ambient Air Quality Standards (NAAQS) 2009, India at few monitoring locations. Benzo (a) Pyrene (BaP) –particulate phase in ambient air was not detected during this study. Ambient air Quality Index was found to be moderate (115.56-198.36) at six locations and satisfactory (17.60-94.94) at three locations in Dewas industrial area. Overall ambient Air Quality Index of Dewas industrial area was observed, satisfactory to moderate during this study w.r.t. Air Quality Index. KEY WORDS: Industrial Area, Ambient Air, Air Pollutants, Air Quality Index

scholarly journals Real Time Ambient Air Quality Status during Diwali Festival in Central, India

2016 ◽  
Vol 04 (01) ◽  
pp. 162-172 ◽  
Author(s):  
Shivangi Nigam ◽  
Navneet Kumar ◽  
N. K. Mandal ◽  
B. Padma ◽  
S. Rao
Keyword(s):  
Air Quality ◽  
Real Time ◽  
Central India ◽  
Ambient Air ◽  
Ambient Air Quality ◽  
Diwali Festival ◽  
Quality Status
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