Atmospheric chemistry and physics,
Journal Year:
2021,
Volume and Issue:
21(9), P. 7253 - 7269
Published: May 12, 2021
Abstract.
Ground-level
ozone
(O3)
pollution
has
been
steadily
getting
worse
in
most
parts
of
eastern
China
during
the
past
5
years.
The
non-linearity
O3
formation
with
its
precursors
like
nitrogen
oxides
(NOx=
NO
+
NO2)
and
volatile
organic
compounds
(VOCs)
are
complicating
effective
abatement
plans.
diagnosis
from
space-based
observations,
i.e.
ratio
formaldehyde
(HCHO)
columns
to
tropospheric
NO2
(HCHO
/
NO2),
previously
proved
be
highly
consistent
our
current
understanding
surface
chemistry.
HCHO
thresholds
distinguishing
sensitivity
depend
on
regions
chemistry
interactions
aerosol.
To
shed
more
light
over
China,
we
have
derived
by
directly
connecting
satellite-based
observations
ground-based
measurements
major
Chinese
cities
this
study.
We
find
that
a
VOC-limited
regime
occurs
for
<
2.3,
NOx-limited
>
4.2.
between
2.3
4.2
reflects
transition
two
regimes.
Our
method
shows
tends
urban
areas
rural
remote
China.
there
is
shift
some
transitional
associated
rapid
drop
anthropogenic
NOx
emissions,
owing
widely
applied
rigorous
emission
control
strategies
2016
2019.
This
detected
spatial
expansion
supported
rising
concentrations.
enhanced
concentrations
COVID-19
lockdown
indicate
protocol
simultaneous
emissions
VOC
controls
essential
The Science of The Total Environment,
Journal Year:
2020,
Volume and Issue:
750, P. 141521 - 141521
Published: Aug. 4, 2020
In
order
to
control
the
spread
of
COVID-19,
social
distancing
measures
were
implemented
in
many
countries.
This
study
investigated
changes
air
pollution
during
after
COVID-19
outbreak
Korea.
Ambient
PM
Environmental Challenges,
Journal Year:
2021,
Volume and Issue:
2, P. 100027 - 100027
Published: Jan. 1, 2021
South
Asia
is
one
of
the
most
densely
populated
regions
in
world.
With
5%
global
agricultural
land,
Asian
farmers
have
to
feed
over
20%
population.
also
poorest
word
with
about
one-third
world's
poor
living
this
region.
Climate
change
has
become
a
pressing
issue
south
ravaging
agriculture
and
threatening
food
security.
affecting
fundamental
basis
through
changes
temperature,
rainfall
weather,
by
intensifying
occurrences
floods,
droughts
heat
stress.
Like
climate
change,
pandemic
risk.
The
novel
Corona
virus
(COVID-19)
further
disrupted
many
activities
supply
chains
Asia,
compounding
challenges
nutrition
security
sustaining
livelihoods.
are
now
facing
double
addressing
impacts
changing
managing
disruption
arising
from
Covid-19
pandemic.
unprecedented
challenge
posed
COVID-19
requires
very
urgent
decisive
actions
ensure
save
people's
lives
Regional
cooperation
necessary
address
ripple
effects
change.
countries
must
act
collectively
share
experiences
improve
chain.
Strategies
approaches
needed
both
coronavirus
crises.
Currently,
there
unique
opportunity
use
disruptive
forces
associated
recovery
policies
accelerate
transition
more
sustainable
resilient
systems.
Some
short-term
support
can
be
linked
long-term
production
investing
natural
capital
productivity
resilience.
Aerosol and Air Quality Research,
Journal Year:
2020,
Volume and Issue:
20(7), P. 1530 - 1540
Published: Jan. 1, 2020
The
COVID-19
(Coronavirus
Disease
2019)
broke
out
in
the
late
of
2019.
On
January
23
Wuhan,
and
later
all
other
cities
country,
there
were
taken
measures
to
control
spread
virus
through
quarantine
measures.
This
article
focused
on
East
China
attempted
assess
comprehensively
environmental
impact
outbreak.
study
analyzed
satellite
observational
data
sulfur
dioxide
(SO2),
nitrogen
(NO2),
carbon
monoxide
(CO)
aerosol
optical
depth
(AOD)
period
before
outbreak
epidemic
during
implementation
preventive
COVID-19,
as
well
compared
it
with
obtained
same
results
analysis
showed
that
lockdown
improved
air
quality
short
term,
but
soon
coal
consumption
at
power
plants
refineries
returned
normal
levels
due
resumption
their
work,
pollution
previous
level.
CO
NO2
most
significant
decrease
(20
30%),
since
they
mainly
associated
a
economic
growth
transport
restrictions
led
change
energy
reduction
emissions.
can
complement
scientific
community
protection
policy
makers,
not
only
quality,
also
for
its
effectiveness
simple
alternative
program
action
improve
quality.
Atmospheric chemistry and physics,
Journal Year:
2021,
Volume and Issue:
21(9), P. 7253 - 7269
Published: May 12, 2021
Abstract.
Ground-level
ozone
(O3)
pollution
has
been
steadily
getting
worse
in
most
parts
of
eastern
China
during
the
past
5
years.
The
non-linearity
O3
formation
with
its
precursors
like
nitrogen
oxides
(NOx=
NO
+
NO2)
and
volatile
organic
compounds
(VOCs)
are
complicating
effective
abatement
plans.
diagnosis
from
space-based
observations,
i.e.
ratio
formaldehyde
(HCHO)
columns
to
tropospheric
NO2
(HCHO
/
NO2),
previously
proved
be
highly
consistent
our
current
understanding
surface
chemistry.
HCHO
thresholds
distinguishing
sensitivity
depend
on
regions
chemistry
interactions
aerosol.
To
shed
more
light
over
China,
we
have
derived
by
directly
connecting
satellite-based
observations
ground-based
measurements
major
Chinese
cities
this
study.
We
find
that
a
VOC-limited
regime
occurs
for
<
2.3,
NOx-limited
>
4.2.
between
2.3
4.2
reflects
transition
two
regimes.
Our
method
shows
tends
urban
areas
rural
remote
China.
there
is
shift
some
transitional
associated
rapid
drop
anthropogenic
NOx
emissions,
owing
widely
applied
rigorous
emission
control
strategies
2016
2019.
This
detected
spatial
expansion
supported
rising
concentrations.
enhanced
concentrations
COVID-19
lockdown
indicate
protocol
simultaneous
emissions
VOC
controls
essential
