Enhanced Marine VOC Emissions Driven by Terrestrial Nutrient Inputs and Their Impact on Urban Air Quality in Coastal Regions
Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 18, 2025
Global
ocean
significantly
contributes
to
atmospheric
volatile
organic
compounds
(VOCs),
yet
the
characteristics,
drivers,
and
impacts
of
marine
VOC
emissions
on
coastal
air
quality
remain
poorly
understood
due
limited
marine-terrestrial
data
integration.
Therefore,
we
conducted
a
study
in
East
China
Sea─a
region
with
high
emission
potential─and
nearby
city
Yangtze
River
Delta─a
background
receptor
site.
Seawater
showed
marked
spatial
variability,
alkenes
forming
an
important
component.
Terrestrial
inorganic
nutrient
inputs
boosted
primary
productivity,
elevating
concentrations
emissions.
Interestingly,
city,
severe
photochemical
pollution
occurred
when
masses
originated
predominantly
from
sea.
Although
maritime
contained
fewer
VOCs,
high-productivity
seawater
shipping
increased
reactive
alkene
levels.
Additionally,
higher
temperatures,
stronger
solar
radiation,
reduced
NO
titration
effects
over
sea
facilitated
ozone
formation.
By
integrating
observations,
this
underscores
impact
pollutant
seas
quality,
particularly
through
secondary
formation
during
long-range
transport.
The
link
between
eutrophication
emphasizes
need
for
coordinated
water
control
cities.
These
findings
may
apply
other
similar
environments
worldwide.
Язык: Английский
Occurrence, migration and environmental effects of neglected BTEX in the coastal multiple environments
浩 高橋,
Jian Wang,
Wen-Zhu Qiao
и другие.
Journal of Hazardous Materials,
Год журнала:
2025,
Номер
unknown, С. 138555 - 138555
Опубликована: Май 1, 2025
Язык: Английский
IPB-MSA&SO4: a daily 0.25° resolution dataset of in situ-produced biogenic methanesulfonic acid and sulfate over the North Atlantic during 1998–2022 based on machine learning
Earth system science data,
Год журнала:
2024,
Номер
16(6), С. 2717 - 2740
Опубликована: Июнь 12, 2024
Abstract.
Accurate
long-term
marine-derived
biogenic
sulfur
aerosol
concentrations
at
high
spatial
and
temporal
resolutions
are
critical
for
a
wide
range
of
studies,
including
climatology,
trend
analysis,
model
evaluation;
this
information
is
also
imperative
the
accurate
investigation
contribution
to
burden,
elucidation
their
radiative
impacts,
provide
boundary
conditions
regional
models.
By
applying
machine
learning
algorithms,
we
constructed
first
publicly
available
daily
gridded
dataset
in
situ-produced
methanesulfonic
acid
(MSA)
non-sea-salt
sulfate
(nss-SO4=)
covering
North
Atlantic.
The
resolution
(0.25°
×
0.25°)
spans
25
years
(1998–2022),
far
exceeding
what
observations
alone
could
achieve
both
spatially
temporally.
models
were
generated
by
combining
situ
data
from
Mace
Head
Atmospheric
Research
Station,
located
on
west
coast
Ireland,
Atlantic
Aerosols
Marine
Ecosystems
Study
(NAAMES)
cruises
northwestern
with
sea-to-air
dimethylsulfide
flux
(FDMS)
ECMWF
ERA5
reanalysis
datasets.
To
determine
optimal
method
regression,
employed
five
types:
support
vector
machines,
decision
tree,
regression
ensemble,
Gaussian
process
artificial
neural
networks.
A
comparison
mean
absolute
error
(MAE),
root-mean-square
(RMSE),
coefficient
determination
(R2)
revealed
that
(GPR)
was
most
effective
algorithm,
outperforming
other
respect
simulating
MSA
nss-SO4=
concentrations.
For
predicting
(nss-SO4=),
GPR
displayed
highest
R2
value
0.86
(0.72)
lowest
MAE
0.014
(0.10)
µg
m−3.
partial
dependence
analysis
suggests
relationships
between
predictors
complex
rather
than
linear.
Using
produced
high-resolution
sea-level
over
Atlantic,
which
named
“In-situ
Produced
Biogenic
Methanesulfonic
Acid
Sulfate
Atlantic”
(IPB-MSA&SO4).
obtained
IPB-MSA&SO4
allowed
us
analyze
spatiotemporal
patterns
as
well
ratio
them
(MSA:nss-SO4=).
existing
Copernicus
Atmosphere
Monitoring
Service
Composition
Reanalysis
4
(CAMS-EAC4)
suggested
our
reproduces
concentration
accuracy
has
consistency
independent
measurements
Ocean.
https://doi.org/10.17632/j8bzd5dvpx.1
(Mansour
et
al.,
2023b).
Язык: Английский
Factors Controlling DMS Emission and Atmospheric Sulfate Aerosols in the Western Pacific Continental Sea
Journal of Geophysical Research Oceans,
Год журнала:
2024,
Номер
129(7)
Опубликована: Июль 1, 2024
Abstract
The
western
Pacific
continental
sea
significantly
influences
the
regulation
of
climate‐active
gases
budget
and
burden
sulfate
aerosols.
An
underway
shipboard
measurement
device
was
used
to
determine
dimethyl
sulfide
(DMS)
in
surface
seawater
overlying
atmosphere
East
China
Continental
Sea.
average
concentration
DMS
122.8
±
86.2pptv
6.47
3.58
nmol
L
−1
,
respectively.
variation
trend
water
influenced
by
abundance
composition
phytoplankton
under
different
ocean
current
systems,
with
a
significant
impact
from
eddies
on
production
South
By
eliminating
influence
terrestrial
sources
limiting
air
mass
transport
within
marine
boundary
layer,
strong
correlations
were
established
between
atmospheric
exposure
chlorophyll
(E
chl
),
as
well
aerosol
methanesulfonic
acid
(MSA)
E
.
During
sampling
period,
levels
(1,057
371
ng/m
3
)
higher
than
MSA
(46.3
59.8
Sea,
where
conversion
not
affected
changes
concentration.
sea‐to‐air
fluxes
varied
over
wide
range,
0.02
156.0
μmol
m
−2
d
an
14.35
18.58
Marine
emissions
play
critical
role
formation
sulfur
aerosols
shelf,
accounting
for
24.6
7.6%
(14.8%–37.8%)
total
Язык: Английский