Atmospheric Environment,
Год журнала:
2024,
Номер
331, С. 120603 - 120603
Опубликована: Май 23, 2024
High-resolution
multi-component
estimates
of
ground-level
air
pollutants
are
necessary
for
assessing
their
impacts
to
human
health,
agriculture,
and
ecosystems.
We
demonstrate
a
high-resolution
fusion
downscaling
approach
over
South
Korea
May
2016
2021.
Daily
1
km
fine
particulate
matter
(PM2.5),
ozone
(O3),
nitrogen
dioxide
(NO2)
concentrations
calculated
at
ground
level
using
random
forest
machine
learning
(ML)
algorithm,
with
predictors
including
reanalysis
meteorology,
satellite
aerosol
optical
depth
(AOD),
gridded
surface
fields
from
chemical
transport
models
(CTM).
The
ML
model
is
tested
2016,
coinciding
the
Korea-United
States
Air
Quality
Study
(KORUS-AQ)
intensive
field
campaign,
2021,
allow
incorporation
observations
Geostationary
Environment
Monitoring
Spectrometer
(GEMS).
In
tests
correlation
coefficients
(R)
root
mean
squared
errors
(RMSE)
relative
withheld
daily-averaged
in
10-fold
cross-validation
promising:
0.93
(5.5
μg/m3),
0.90
ppbv),
0.95
(4.7
ppbv)
PM2.5,
O3,
NO2,
respectively.
Relative
performance
assessed
alternate
choices
predictors:
(a)
80-km
global
Copernicus
Atmosphere
Service
(CAMS)
vs.
4-km
regional
Weather
Research
Forecasting
coupled
Chemistry
(WRF-Chem);
(b)
AOD
polar-orbiting
Moderate
Resolution
Image
Spectroradiometer
(MODIS)
Multi-Angle
Implementation
Atmospheric
Correction
(MAIAC)
geostationary
GEMS;
(c)
variations
observation
density.
This
study
among
very
first
incorporate
both
CTM
GEMS
building
high
resolution
multiple
pollution
predictions
Korea.
Atmospheric chemistry and physics,
Год журнала:
2023,
Номер
23(2), С. 1511 - 1532
Опубликована: Янв. 26, 2023
Abstract.
Gaseous
pollutants
at
the
ground
level
seriously
threaten
urban
air
quality
environment
and
public
health.
There
are
few
estimates
of
gaseous
that
spatially
temporally
resolved
continuous
across
China.
This
study
takes
advantage
big
data
artificial-intelligence
technologies
to
generate
seamless
daily
maps
three
major
ambient
pollutant
gases,
i.e.,
NO2,
SO2,
CO,
China
from
2013
2020
a
uniform
spatial
resolution
10
km.
Cross-validation
between
our
observations
illustrated
high
on
basis
for
surface
CO
concentrations,
with
mean
coefficients
determination
(root-mean-square
errors)
0.84
(7.99
µg
m−3),
(10.7
0.80
(0.29
mg
respectively.
We
found
COVID-19
lockdown
had
sustained
impacts
pollutants,
where
recovered
its
normal
in
around
34th
day
after
Lunar
New
Year,
while
SO2
NO2
rebounded
more
than
2
times
slower
due
emissions
residents'
increased
indoor
cooking
atmospheric
oxidation
capacity.
Surface
reached
their
peak
annual
concentrations
21.3
±
8.8
m−3,
23.1
13.3
1.01
0.29
m−3
2013,
then
continuously
declined
over
time
by
12
%,
55
17
respectively,
until
2020.
The
declining
rates
were
prominent
2017
sharper
reductions
anthropogenic
but
have
slowed
down
recent
years.
Nevertheless,
people
still
suffer
high-frequency
risk
exposure
eastern
China,
almost
World
Health
Organization
(WHO)
recommended
short-term
guidelines
(AQG)
since
2018,
benefiting
implemented
stricter
“ultra-low”
emission
standards.
reconstructed
dataset
will
benefit
future
(especially
short-term)
pollution
environmental
health-related
studies.
Environmental Science & Technology,
Год журнала:
2023,
Номер
57(46), С. 18282 - 18295
Опубликована: Апрель 28, 2023
Fine
particulate
matter
(PM2.5)
chemical
composition
has
strong
and
diverse
impacts
on
the
planetary
environment,
climate,
health.
These
effects
are
still
not
well
understood
due
to
limited
surface
observations
uncertainties
in
model
simulations.
We
developed
a
four-dimensional
spatiotemporal
deep
forest
(4D-STDF)
estimate
daily
PM2.5
at
spatial
resolution
of
1
km
China
since
2000
by
integrating
measurements
species
from
high-density
observation
network,
satellite
retrievals,
atmospheric
reanalyses,
Cross-validation
results
illustrate
reliability
sulfate
(SO42-),
nitrate
(NO3-),
ammonium
(NH4+),
chloride
(Cl-)
estimates,
with
high
coefficients
determination
(CV-R2)
ground-based
0.74,
0.75,
0.71,
0.66,
average
root-mean-square
errors
(RMSE)
6.0,
6.6,
4.3,
2.3
μg/m3,
respectively.
The
three
components
secondary
inorganic
aerosols
(SIAs)
account
for
21%
20%
14%
(NH4+)
total
mass
eastern
China;
we
observed
significant
reductions
40-43%
between
2013
2020,
slowing
down
2018.
Comparatively,
ratio
SIA
increased
7%
across
except
Beijing
nearby
areas,
accelerating
recent
years.
SO42-
been
dominant
component
China,
although
it
was
surpassed
NO3-
some
e.g.,
Beijing-Tianjin-Hebei
region
2016.
SIA,
accounting
nearly
half
(∼46%)
mass,
drove
explosive
formation
winter
haze
episodes
North
Plain.
A
sharp
decline
concentrations
an
increase
SIA-to-PM2.5
ratios
during
COVID-19
lockdown
were
also
revealed,
reflecting
enhanced
oxidation
capacity
particles.
Circulation,
Год журнала:
2023,
Номер
148(4), С. 312 - 323
Опубликована: Июль 24, 2023
Extreme
temperature
events
(ETEs),
including
heat
wave
and
cold
spell,
have
been
linked
to
myocardial
infarction
(MI)
morbidity;
however,
their
effects
on
MI
mortality
are
less
clear.
Although
ambient
fine
particulate
matter
(PM
The Lancet Planetary Health,
Год журнала:
2023,
Номер
7(12), С. e963 - e975
Опубликована: Дек. 1, 2023
Long-term
improvements
in
air
quality
and
public
health
the
continental
USA
were
disrupted
over
past
decade
by
increased
fire
emissions
that
potentially
offset
decrease
anthropogenic
emissions.
This
study
aims
to
estimate
trends
black
carbon
PM
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Дек. 15, 2023
Abstract
Here
we
retrieve
global
daily
1
km
gapless
PM
2.5
concentrations
via
machine
learning
and
big
data,
revealing
its
spatiotemporal
variability
at
an
exceptionally
detailed
level
everywhere
every
day
from
2017
to
2022,
valuable
for
air
quality
monitoring,
climate
change,
public
health
studies.
We
find
that
96%,
82%,
53%
of
Earth’s
populated
areas
are
exposed
unhealthy
least
one
day,
week,
month
in
respectively.
Strong
disparities
exposure
risks
duration
exhibited
between
developed
developing
countries,
urban
rural
areas,
different
parts
cities.
Wave-like
dramatic
changes
clearly
seen
around
the
world
before,
during,
after
COVID-19
lockdowns,
as
is
mortality
burden
linked
fluctuating
pollution
events.
Encouragingly,
only
approximately
one-third
all
countries
return
pre-pandemic
levels.
Many
nature-induced
episodes
also
revealed,
such
biomass
burning.
Electronics,
Год журнала:
2025,
Номер
14(4), С. 696 - 696
Опубликована: Фев. 11, 2025
The
integration
of
artificial
intelligence
(AI)
agents
with
the
Internet
Things
(IoT)
has
marked
a
transformative
shift
in
environmental
monitoring
and
management,
enabling
advanced
data
gathering,
in-depth
analysis,
more
effective
decision
making.
This
comprehensive
literature
review
explores
AI
IoT
technologies
within
sciences,
particular
focus
on
applications
related
to
water
quality
climate
data.
methodology
involves
systematic
search
selection
relevant
studies,
followed
by
thematic,
meta-,
comparative
analyses
synthesize
current
research
trends,
benefits,
challenges,
gaps.
highlights
how
enhances
IoT’s
collection
capabilities
through
predictive
modeling,
real-time
analytics,
automated
making,
thereby
improving
accuracy,
timeliness,
efficiency
systems.
Key
benefits
identified
include
enhanced
precision,
cost
efficiency,
scalability,
facilitation
proactive
management.
Nevertheless,
this
encounters
substantial
obstacles,
including
issues
quality,
interoperability,
security,
technical
constraints,
ethical
concerns.
Future
developments
point
toward
enhancements
technologies,
incorporation
innovations
like
blockchain
edge
computing,
potential
formation
global
systems,
greater
public
involvement
citizen
science
initiatives.
Overcoming
these
challenges
embracing
new
technological
trends
could
enable
play
pivotal
role
strengthening
sustainability
resilience.
Environment International,
Год журнала:
2022,
Номер
170, С. 107606 - 107606
Опубликована: Ноя. 3, 2022
Surface
ozone
(O3),
one
of
the
harmful
air
pollutants,
generated
significantly
negative
effects
on
human
health
and
plants.
Existing
O3
datasets
with
coarse
spatiotemporal
resolution
limited
coverage,
uncertainties
influential
factors
seriously
restrain
related
epidemiology
pollution
studies.
To
tackle
above
issues,
we
proposed
a
novel
scheme
to
estimate
daily
concentrations
fine
grid
scale
(1
km
×
1
km)
from
2018
2020
across
China
based
machine
learning
methods
using
hourly
observed
ground-level
pollutant
data,
meteorological
satellite
auxiliary
data
including
digital
elevation
model
(DEM),
land
use
(LUD),
normalized
difference
vegetation
index
(NDVI),
population
(POP),
nighttime
light
images
(NTL),
identify
diverse
urbanization
topography
conditions.
Some
findings
were
achieved.
The
correlation
coefficients
(R2)
between
surface
net
solar
radiation
(SNSR),
boundary
layer
height
(BLH),
2
m
temperature
(T2M),
10
v-component
(MVW),
NDVI
0.80,
0.40,
0.35,
0.30,
0.20,
respectively.
random
forest
(RF)
demonstrated
highest
validation
R2
(0.86)
lowest
RMSE
(13.74
μg/m3)
in
estimating
concentrations,
followed
by
support
vector
(SVM)
(R2
=
0.75,
18.39
μg/m3),
backpropagation
neural
network
(BP)
0.74,
19.26
multiple
linear
regression
(MLR)
0.52,
25.99
μg/m3).
Our
High-Resolution
Dataset
(CHROD)
exhibited
an
acceptable
accuracy
at
different
spatial-temporal
scales.
Additionally,
showed
decreasing
trend
represented
obviously
heterogeneity
2020.
Overall,
was
mainly
affected
activities
higher
regions,
while
controlled
factors,
lower
regions.
this
study
is
useful
valuable
understanding
mechanism
formation
improving
quality
dataset.
The Lancet Regional Health - Western Pacific,
Год журнала:
2023,
Номер
36, С. 100776 - 100776
Опубликована: Май 4, 2023
Evidence
on
the
associations
between
long-term
exposure
to
multiple
air
pollutants
and
cardiopulmonary
mortality
is
limited,
especially
for
developing
regions
with
higher
pollutant
levels.
We
aimed
characterise
individual
joint
(multi-pollutant)
of
mortality,
identify
that
primarily
contributes
risk.