Environmental Engineering Research,
Journal Year:
2023,
Volume and Issue:
29(4), P. 230475 - 0
Published: Nov. 8, 2023
The
air
pollution
process
and
impact
mechanism
of
megacities
located
in
complex
terrain
are
particularly
complex.
As
a
typical
megacity
China,
Chengdu
has
unique
topographical
meteorological
conditions,
its
control
is
difficult.
This
study
systematically
elucidated
the
variation
characteristics
six
criteria
pollutants
between
2014
2020.
Besides,
PM<sub>2.5</sub>/PM<sub>10</sub>
NO<sub>2</sub>/SO<sub>2</sub>
ratios
were
discussed.
Furthermore,
detailed
analysis
correlation
was
carried
out.
Finally,
collaborative
path
carbon
reduction
results
indicated
that
SO<sub>2</sub>,
PM<sub>2.5</sub>,
PM<sub>10</sub>
CO
significantly
decreased
by
62.9%,
50.8%,
45.5%,
36.7%,
respectively.
PM<sub>2.5</sub>
O<sub>3</sub>
compliance
rates
very
low,
increases
with
fluctuations.
NO<sub>2</sub>,
CO,
PM
showed
“U-shaped”
seasonal
variation,
there
“seesaw”
phenomenon
PM<sub>2.5</sub>.
continuous
changing
trends
also
found
NO<sub>2</sub>/SO<sub>2</sub>.
highlight
importance
coordinated
emissions
Chengdu.
research
can
improve
prediction
accuracy
areas
under
global
warming,
understanding
formation
special
terrains
around
world.
Aerosol and Air Quality Research,
Journal Year:
2024,
Volume and Issue:
24(5), P. 230274 - 230274
Published: Jan. 1, 2024
Air
pollution
affects
sustainable
development
of
the
natural
environment
and
social
economy.
In
this
article,
changes
in
air
quality
index
(AQI)
six
pollutants
Hohhot
during
2014–2022
are
analyzed.
The
results
imply
that
annual
average
concentrations
five
(SO2,
PM10,
PM2.5,
NO2,
CO)
AQI
values
declined
year
by
over
2014–2022.
Compared
with
2014,
fell
22.5%
2022.
However,
O3
increased
year.
PM2.5
PM10
were
major
factors
influencing
AQI.
Among
types
atmospheric
pollutants,
relationship
between
NO2
is
strongest,
implying
plays
a
significant
influence
formation
PM2.5.
Meteorological
socio-economic
have
impact
on
quality.
wind
speed
(AWS),
pressure
(AP),
sulfur
dioxide
emissions
(SOE),
nitrogen
oxide
(NOE),
particulate
matter
(PME)
positive
effect
provide
information
great
importance
for
management
City.
Toxics,
Journal Year:
2023,
Volume and Issue:
11(3), P. 210 - 210
Published: Feb. 24, 2023
Air
pollution
affects
climate
change,
food
production,
traffic
safety,
and
human
health.
In
this
paper,
we
analyze
the
changes
in
air
quality
index
(AQI)
concentrations
of
six
pollutants
Jinan
during
2014–2021.
The
results
indicate
that
annual
average
PM10,
PM2.5,
NO2,
SO2,
CO,
O3
AQI
values
all
declined
year
after
Compared
with
2014,
City
fell
by
27.3%
2021.
four
seasons
2021
was
obviously
better
than
2014.
PM2.5
concentration
highest
winter
lowest
summer,
while
it
opposite
for
concentration.
COVID
epoch
2020
remarkably
lower
compared
same
Nevertheless,
post-COVID
conspicuously
deteriorated
Socioeconomic
elements
were
main
reasons
quality.
majorly
influenced
energy
consumption
per
10,000-yuan
GDP
(ECPGDP),
SO2
emissions
(SDE),
NOx
(NOE),
particulate
(PE),
PM10.
Clean
policies
played
a
key
role
improving
Unfavorable
meteorological
conditions
led
to
heavy
weather
winter.
These
could
provide
scientific
reference
control
City.
The Science of The Total Environment,
Journal Year:
2024,
Volume and Issue:
918, P. 170550 - 170550
Published: Feb. 4, 2024
Detailed
spatial
models
of
monthly
air
pollution
levels
at
a
very
fine
resolution
(25
m)
can
help
facilitate
studies
to
explore
critical
time-windows
exposure
intermediate
term.
Seasonal
changes
in
may
affect
both
and
patterns
across
Europe.
We
built
Europe-wide
land-use
regression
(LUR)
estimate
concentrations
regulated
pollutants
(NO
