Toxics,
Journal Year:
2024,
Volume and Issue:
12(11), P. 787 - 787
Published: Oct. 29, 2024
Volatile
organic
compounds
(VOCs)
are
ubiquitous
in
the
atmosphere,
posing
significant
adverse
impacts
on
air
quality
and
human
health.
However,
current
research
atmospheric
VOCs
mainly
focuses
specific
regions
or
industries,
without
comprehensive
national-level
analysis.
In
this
study,
a
total
of
99
articles
China
published
from
2015
to
2024
were
screened,
data
their
concentrations,
source
apportionment,
health
risks
extracted
summarized.
The
results
revealed
that
annual
average
concentrations
TVOCs
groups
generally
increased
then
decreased
between
2011
2022,
peaking
2018-2019.
A
distinct
seasonal
pattern
was
observed,
with
highest
occurring
winter,
followed
by
autumn,
spring,
summer.
TVOC
emissions
highly
concentrated
northern
eastern
China,
contributed
alkanes
alkenes.
Source
apportionment
indicated
vehicle
sources
(32.9%
±
14.3%),
industrial
(18.0%
12.8%),
other
combustion
(13.0%
13.0%)
primary
China.
There
positive
correlation
(
Remote Sensing,
Journal Year:
2024,
Volume and Issue:
16(7), P. 1298 - 1298
Published: April 7, 2024
Air
pollution
has
been
standing
as
one
of
the
most
pressing
global
challenges.
The
changing
patterns
air
pollutants
at
different
spatial
and
temporal
scales
have
substantially
studied
all
over
world,
which,
however,
were
intricately
disturbed
by
COVID-19
subsequent
containment
measures.
Understanding
fine-scale
stages
epidemic’s
course
is
necessary
for
better
identifying
region-specific
drivers
preparing
environmental
decision
making
during
future
epidemics.
Taking
China
an
example,
this
study
developed
a
multi-output
LightGBM
approach
to
estimate
monthly
concentrations
six
major
(i.e.,
PM2.5,
PM10,
NO2,
SO2,
O3,
CO)
in
revealed
distinct
spatiotemporal
each
pollutant
course.
5-year
period
2019–2023
was
selected
observe
changes
from
pre-COVID-19
era
lifting
performance
our
model,
assessed
cross-validation
R2,
demonstrated
high
accuracy
with
values
0.92
0.95
0.90
0.79
0.82
CO.
Notably,
there
improvement
particulate
matter,
particularly
although
PM10
exhibited
rebound
northern
regions.
SO2
CO
consistently
declined
across
country
(p
<
0.001
p
0.05,
respectively),
while
O3
southern
regions
experienced
notable
increase.
Concentrations
Beijing–Tianjin–Hebei
region
effectively
controlled
mitigated.
findings
provide
critical
insights
into
trends
quality
public
health
emergencies,
help
guide
development
targeted
interventions,
inform
policy
aimed
reducing
disease
burdens
associated
pollution.
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(36), P. 15938 - 15948
Published: Aug. 28, 2024
Accurately
mapping
ground-level
ozone
concentrations
at
high
spatiotemporal
resolution
(daily,
1
km)
is
essential
for
evaluating
human
exposure
and
conducting
public
health
assessments.
This
requires
identifying
understanding
a
proxy
that
well-correlated
with
variation
available
high-resolution
data.
study
introduces
modeling
method
utilizing
the
XGBoost
algorithm
satellite-derived
land
surface
temperature
(LST)
as
primary
predictor.
Focusing
on
China
in
2019,
our
model
achieved
cross-validation
