Aerosol and Air Quality Research,
Journal Year:
2014,
Volume and Issue:
15(1), P. 99 - 116
Published: Oct. 7, 2014
The
reduction
in
vehicle
exhaust
emissions
achieved
the
last
two
decades
is
offset
by
growth
traffic,
as
well
changes
composition
of
emitted
pollutants.
present
investigation
illustrates
eight
in-use
gasoline
and
diesel
passenger
cars
using
official
European
driving
cycle
ARTEMIS
real-world
cycles.
Measurements
comprised
gaseous
regulated
pollutants
(CO,
CO2,
NOx
hydrocarbons),
particulate
matter
its
carbonaceous
content
(organic
elemental
carbon,
OC
EC),
about
20
different
volatile
organic
compounds
(VOCs)
C6–C11
range.
It
was
observed
that
some
vehicles
do
not
comply
with
corresponding
regulations.
Significant
differences
were
registered
between
Not
all
showed
a
tendency
to
decrease
from
Euro
3
5.
carbon
emission
factors
significantly
lower
under
Road
compared
Urban
cold
start.
In
general,
start-up
conditions
produced
highest
factors.
A
decline
5
observed,
whilst
this
trend
for
petrol-powered
cars.
fraction
total
composed
EC
much
particles
petrol
(<
10%)
than
engines
(50–95%).
However,
more
modern
equipped
filter
(DPF)
almost
negligible.
Among
VOCs,
benzene,
toluene
xylenes
generally
dominant
species.
significant
4
observed.
VOC
unclear
when
are
considered.
During
DPF
regeneration
cycles,
pollutant
several
times
larger
those
during
normal
engine
operation.
Environment International,
Journal Year:
2020,
Volume and Issue:
139, P. 105558 - 105558
Published: April 8, 2020
Air
pollution
over
China
has
attracted
wide
interest
from
public
and
academic
community.
PM2.5
is
the
primary
air
pollutant
across
China.
Quantifying
interactions
between
meteorological
conditions
concentrations
are
essential
to
understand
variability
of
seek
methods
control
PM2.5.
Since
2013,
measurement
been
widely
made
at
1436
stations
country
more
than
300
papers
focusing
on
PM2.5-meteorology
have
published.
This
article
a
comprehensive
review
impact
concentrations.
We
start
with
an
introduction
general
China,
then
seasonal
spatial
variations
influences
Next,
major
used
quantify
checked
compared.
find
that
causality
analysis
suitable
for
extracting
influence
individual
factors
whilst
statistical
models
good
quantifying
overall
effect
multiple
Chemical
Transport
Models
(CTMs)
potential
provide
dynamic
estimation
by
considering
anthropogenic
emissions
transport
evolution
pollutants.
comprehensively
examine
mechanisms
how
may
concentrations,
including
dispersion,
growth,
chemical
production,
photolysis,
deposition
The
feedback
effects
also
carefully
examined.
Based
this
review,
suggestions
future
research
approaches
mitigating
finally.
Proceedings of the National Academy of Sciences,
Journal Year:
2017,
Volume and Issue:
114(7)
Published: Jan. 30, 2017
Significance
A
successful
mitigation
strategy
for
climate
warming
agents
such
as
black
carbon
(BC)
requires
reliable
source
information
from
bottom-up
emission
inventory
data,
which
can
only
be
verified
by
observation.
We
measured
BC
in
one
of
the
fastest-warming
and,
at
same
time,
substantially
understudied
regions
on
our
planet,
northeastern
Siberian
Arctic.
Our
observations,
compared
with
an
atmospheric
transport
model,
imply
that
quantification
and
spatial
allocation
emissions
high
latitudes,
specifically
Russian
Arctic,
need
improvement
reallocating
significantly
shifting
contributions
transport,
domestic,
power
plant,
gas
flaring
sectors.
This
strong
shift
reported
has
potentially
considerable
implications
modeling
efforts.
Environmental Science & Technology,
Journal Year:
2016,
Volume and Issue:
50(21), P. 11511 - 11520
Published: Oct. 6, 2016
Sea
spray
aerosol
(SSA)
is
a
globally
important
source
of
particulate
matter.
A
mesocosm
study
was
performed
to
determine
the
relative
enrichment
saccharides
and
inorganic
ions
in
nascent
fine
(PM2.5)
coarse
(PM10-2.5)
SSA
sea
surface
microlayer
(SSML)
bulk
seawater.
Saccharides
comprise
significant
fraction
organic
matter
(11
27%,
respectively).
Relative
sodium,
individual
were
enriched
14-1314-fold
SSA,
3-138-fold
but
only
up
1.0-16.2-fold
SSML.
Enrichments
SSML
attributed
rising
bubbles
that
scavenge
surface-active
species
from
seawater,
while
further
likely
derives
bubble
films.
Mean
factors
for
major
demonstrated
potassium
(1.3),
magnesium
(1.4),
calcium
(1.7),
because
their
interactions
with
Consequently,
develops
salt
profile
significantly
different
Maximal
enrichments
coincided
second
two
phytoplankton
blooms,
signifying
influence
ocean
biology
on
selective
mass
transfer
across
ocean-air
interface.
