A European aerosol phenomenology – 9: Light absorption properties of carbonaceous aerosol particles across surface Europe
Environment International,
Год журнала:
2024,
Номер
195, С. 109185 - 109185
Опубликована: Дек. 9, 2024
Carbonaceous
aerosols
(CA),
composed
of
black
carbon
(BC)
and
organic
matter
(OM),
significantly
impact
the
climate.
Light
absorption
properties
CA,
particularly
BC
brown
(BrC),
are
crucial
due
to
their
contribution
global
regional
warming.
We
present
(b
Язык: Английский
Influence of ship emitted sulfur and carbonaceous aerosols on East Asian climate in summer
Atmospheric Environment,
Год журнала:
2025,
Номер
344, С. 121035 - 121035
Опубликована: Янв. 10, 2025
Язык: Английский
Global distribution and warming effect of brown carbon from shipping emissions
Carbon Research,
Год журнала:
2025,
Номер
4(1)
Опубликована: Май 20, 2025
Abstract
Emissions
of
shipping
have
great
influences
on
atmospheric
environment
and
global
climate
with
the
growth
maritime
trade.
Previous
studies
identified
that
black
carbon
(BC)
constitutes
main
aerosol
component
responsible
for
light
absorption,
while
organic
(OC)
was
generally
considered
non-absorbing.
Recent
indicated
components
derived
from
emissions
exhibit
absorption
at
short
wavelengths
(brown
carbon,
BrC).
However,
there
is
a
lack
quantification
regarding
effects
BrC.
This
study
investigates
radiative
effect
(RAE)
BrC,
updating
models
measured
BrC
ability.
Surface
concentrations
contribute
~
40%
to
fossil
fuel
OC.
The
annual
average
RAE
+0.15
+0.36
mW
m⁻
2
,
peaking
in
boreal
summer.
warming
8%–19%
relative
BC.
With
low-sulfur
standard,
increases
+0.52
which
close
BC
(+0.52
)
could
offset
direct
cooling
sulfate.
For
aerosols,
an
important
part,
whose
contribution
greater
upgrade
ship
fuels.
Graphical
Язык: Английский
Light Absorption and Chromophore Characteristics of Brown Carbon in PM Emitted From Agricultural Machinery in China
Journal of Geophysical Research Atmospheres,
Год журнала:
2025,
Номер
130(11)
Опубликована: Май 28, 2025
Abstract
The
extensive
utilization
of
agricultural
machinery
in
China
has
made
it
a
prominent
contributor
to
particulate
matter
(PM).
However,
there
still
exist
significant
knowledge
gaps
understanding
optical
characteristics
and
molecular
composition
chromophores
brown
carbon
(BrC)
PM
emitted
from
machinery.
Therefore,
BrC
six
typical
machines
were
measured
investigate
the
light
absorption,
chromophore
characteristics,
influencing
factors.
Results
showed
that
average
emission
factors
methanol‐soluble
organic
(MSOC)
water‐soluble
(WSOC)
0.96
0.21
g
(kg
fuel)
−1
,
respectively,
exhibiting
clear
decreasing
trends
with
increasing
engine
power
improving
standards.
Despite
absorption
coefficient
methanol‐extracted
(Abs
365,M
)
being
approximately
2.2
times
higher
than
water
365,W
),
mass
efficiency
water‐extracted
(MAE
exhibited
significantly
greater
values
MAE
.
Among
detected
chromophores,
nitro‐aromatic
compounds
(NACs)
highest
contribution
was
about
14.5
more
total
compared
their
contributions
MSOC
(0.04%),
followed
by
polycyclic
aromatic
hydrocarbons
(PAHs)
oxygenated
PAHs
(OPAHs).
Besides,
integrated
simple
forcing
estimated
be
1.5
W
for
3.7
WSOC,
indicating
radiative
findings
this
study
not
only
provide
fundamental
data
climate
impact
estimation
but
also
propose
effective
strategies
mitigate
emissions,
such
as
enhancing
standards
promoting
adoption
high‐power
Язык: Английский