Enhancing Time Resolution of Ambient VOC Measurement Data by Machine Learning: From One‐Hour to Five Minutes
Journal of Geophysical Research Atmospheres,
Год журнала:
2025,
Номер
130(5)
Опубликована: Фев. 27, 2025
Abstract
Atmospheric
volatile
organic
compounds
(VOCs)
significantly
impact
the
environment
and
public
health,
necessitating
precise,
continuous
online
monitoring.
Currently,
VOCs
monitoring
primarily
uses
Gas
Chromatography‐Mass
Spectrometry
(GC‐MS)
Proton
Transfer
Reaction‐Time
of
Flight
Mass
(PTR‐ToF‐MS).
GC‐MS
is
favored
for
its
accurate
compound
identification
capabilities
but
limited
by
lower
temporal
resolution.
Conversely,
PTR‐ToF‐MS,
while
achieving
minute‐scale
resolution
directly
ionizing
samples,
struggles
to
detect
low‐proton‐affinity
compounds.
Here,
based
on
5
years
long‐term
data,
we
propose
Adaptive
Convolutional
Tree
Ensemble
(ACTE)
model
surpass
current
instruments
limitations
accurately
obtain
high‐resolution
(5‐min)
VOCs.
Our
results
indicate
that
this
consistently
achieves
robust
predictive
accuracy
across
different
major
species
categories,
notably
R
2
values
0.92
0.89
alkanes
alkenes,
respectively,
which
mostly
have
low‐proton‐affinity.
Furthermore,
comparing
simulations
using
resolutions
in
ozone
mechanism
modeling,
found
models
with
higher
more
comprehensively
capture
rapidly
occurring
photochemical
reactions,
whereas
hourly
tend
overlook
many
details,
potentially
leading
inaccuracies
understanding
related
mechanisms.
This
study
underscores
potential
machine
learning
improve
atmospheric
pollutants
enhance
our
chemical
processes.
Язык: Английский
The primary sources of RO radicals in atmosphere: Oxidative capacity and self-purifying effect
Journal of Environmental Sciences,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 1, 2025
Язык: Английский
Evaluating the contribution of residential coal combustion to atmospheric nitrous acid (HONO) in winter
Environmental Pollution,
Год журнала:
2025,
Номер
unknown, С. 126488 - 126488
Опубликована: Май 1, 2025
Язык: Английский
Ozone production sensitivity analysis for the Chengdu Plain Urban Agglomeration based on a multi-site and two-episode observation
The Science of The Total Environment,
Год журнала:
2024,
Номер
950, С. 175068 - 175068
Опубликована: Июль 31, 2024
Язык: Английский
The coupling model of random forest and interpretable method quantifies the response relationship between PM2.5 and influencing factors
Atmospheric Environment,
Год журнала:
2024,
Номер
341, С. 120925 - 120925
Опубликована: Ноя. 9, 2024
Язык: Английский
Heatwave-amplified atmospheric oxidation in a multi-province border area in Xuzhou, China
Frontiers in Environmental Science,
Год журнала:
2024,
Номер
12
Опубликована: Ноя. 13, 2024
Ozone
formation
is
closely
tied
to
emissions
of
precursors,
meteorological
conditions,
and
atmospheric
chemistry.
In
June
2024,
Xuzhou
City,
located
at
the
intersection
Jiangsu,
Shandong,
Henan,
Anhui
provinces
in
East
China,
experienced
a
series
ozone
pollution
events.
The
continuous
episodes
were
characterized
by
consistently
high
levels
ozone,
with
daytime
peaks
reaching
130
ppb.
By
combining
observations
oxidation
use
Observation-Based
Model
model,
it
was
determined
that
result
“heatwave-ozone”
co-occurring
extreme
event
triggered
elevated
temperatures,
low
humidity,
intense
radiation.
heatwave
led
increased
VOCs
from
both
natural
human-related
sources,
more
pronounced
contribution
Bio-alkenes
OVOCs.
This,
turn,
resulted
higher
oxidizing
agents
potential,
exacerbating
co-occurrence
heatwaves
extremes.
Sensitivity
tests
on
enhanced
controls
showed
reducing
NOx
had
significant
adverse
effect
levels,
whereas
positive
benefits,
particularly
for
controlling
alkenes.
Despite
ongoing
reductions
anthropogenic
VOCs,
temperatures
an
increase
emissions.
On
average,
1°C
temperature
decrease
could
reduce
reactivity
ratio
(VOC
R
/NOx
)
0.12,
thereby
enhancing
advantages
emission
reductions.
Therefore,
implementing
measures
alleviate
heatwaves,
such
as
limiting
high-energy
consumption
inducing
artificial
rainfall,
can
simultaneously
intensity
VOC
emissions,
aiding
effective
implementation
control
policies.
Язык: Английский