Scientific Reports,
Journal Year:
2021,
Volume and Issue:
11(1)
Published: Feb. 19, 2021
Abstract
On
January
30,
2020,
India
recorded
its
first
COVID-19
positive
case
in
Kerala,
which
was
followed
by
a
nationwide
lockdown
extended
four
different
phases
from
25th
March
to
31st
May,
and
an
unlock
period
thereafter.
The
has
led
colossal
economic
loss
India;
however,
it
come
as
respite
the
environment.
Utilizing
air
quality
index
(AQI)
data
during
this
adverse
time,
present
study
is
undertaken
assess
impact
of
on
Ankleshwar
Vapi,
Gujarat,
India.
AQI
obtained
Central
Pollution
Control
Board
assessed
for
phases.
We
compared
phase
with
coinciding
2019
determine
changes
pollutant
concentrations
lockdown,
analyzing
daily
six
pollutants
(PM
10
,
PM
2.5
CO,
NO
2
O
3
SO
).
A
meta-analysis
continuous
performed
mean
standard
deviation
each
phase,
their
differences
were
computed
percentage
comparison
2019;
along
linear
correlation
analysis
regression
relationship
among
trend
days.
results
revealed
patterns
gradual
rapid
reduction
most
2.5,
),
increment
ozone
concentration
observed
due
drastic
80.18%.
Later,
increases
other
also
restrictions
eased
phase-4
1.
between
two
cities
found
that
factors
like
distance
Arabian
coast
industrial
setups
played
vital
role
emission
trends.
Sensors International,
Journal Year:
2020,
Volume and Issue:
1, P. 100021 - 100021
Published: Jan. 1, 2020
India,
which
has
the
second-largest
population
in
world
is
suffering
severely
from
COVID-19
disease.
By
May
18th,
India
investigated
∼1
lakh
(0.1million)
infected
cases
COVID-19,
and
as
of
11th
July
equalled
8
lakhs.
Social
distancing
lockdown
rules
were
employed
however
had
an
additional
impact
on
economy,
human
living,
environment.
Where
a
negative
was
observed
for
economy
life,
environment
got
positive
one.
How
dealt
can
potentially
deal
with
these
three
factors
during
post
situation
been
discussed
here.
Aerosol and Air Quality Research,
Journal Year:
2020,
Volume and Issue:
20(8), P. 1793 - 1804
Published: Jan. 1, 2020
The
first
novel
coronavirus
case
was
confirmed
in
Iran
mid-February
2020.
This
followed
by
the
enforcement
of
lockdown
to
tackle
this
contagious
disease.
study
aims
examine
potential
effects
COVID-19
on
air
quality
Iran.
From
21st
March
April
2019
and
2020,
Data
were
gathered
from
12
stations
analyse
six
criteria
pollutants,
namely
O3,
NO2,
SO2,
CO,
PM10,
PM2.5.
Due
lack
ground-level
measurements,
using
satellite
data
equipped
us
assess
changes
during
Iranian
megacities,
especially
Tehran,
i.e.,
capital
In
city,
concentrations
primary
pollutants
(SO2
5–28%,
NO2
1–33%,
CO
5–41%,
PM10
1.4–30%)
decreased
with
spatial
variations.
Although,
still
exceeded
WHO
daily
limit
levels
for
31
days,
four
respectively.
Conversely,
O3
PM2.5
increased
0.5–103%
2–50%.
terms
national
quality,
SO2
while
AOD
lockdown.
Unfavourable
meteorological
conditions
hindered
pollutant
dispersion.
Moreover,
reductions
height
planetary
boundary
layer
rainfall
observed
period.
Despite
adverse
weather
conditions,
a
decrease
levels,
confirms
possible
improvements
Scientific Reports,
Journal Year:
2020,
Volume and Issue:
10(1)
Published: Oct. 6, 2020
In
this
study,
we
characterize
the
impacts
of
COVID-19
on
air
pollution
using
NO2
and
Aerosol
Optical
Depth
(AOD)
from
TROPOMI
MODIS
satellite
datasets
for
41
cities
in
India.
Specifically,
our
results
suggested
a
13%
reduction
during
lockdown
(March
25-May
3rd,
2020)
compared
to
pre-lockdown
(January
1st-March
24th,
period.
Also,
19%
was
observed
2020-lockdown
as
same
period
2019.
The
top
where
occurred
were
New
Delhi
(61.74%),
(60.37%),
Bangalore
(48.25%),
Ahmedabad
(46.20%),
Nagpur
(46.13%),
Gandhinagar
(45.64)
Mumbai
(43.08%)
with
less
coastal
cities.
temporal
analysis
revealed
progressive
decrease
all
seven
2020
Results
also
spatial
differences,
i.e.,
distance
city
center
increased,
levels
decreased
exponentially.
contrast,
most
cities,
an
increase
Northeast
India
attribute
it
vegetation
fires.
patterns
matched
AOD
signal;
however,
correlations
poor.
Overall,
highlight
NO2,
can
inform
mitigation
efforts
across
different
