Abstract.
Assessing
long-range
transport
(LRT)
of
pollutants
recognizes
that
multiple
sources
varying
scale
and
location
can
impact
air
quality.
In
the
Aburrá
Valley,
Colombia,
other
cities
in
Northern
South
America,
biomass
burning
(BB),
dust,
volcanic
degassing
have
been
identified
as
LRT
aerosols.
However,
these
on
quality
their
characterization
yet
to
be
thoroughly
studied.
This
work
investigates
influence
chemical
composition
PM2.5
during
annual
intra-annual
high-load
aerosol
events.
We
identified,
tracked,
meteorologically
characterized
events
evaluated
concentration
composition.
ran
a
Positive
Matrix
Factorization
(PMF)
for
each
kind
event,
identifying
high
contribution
organic
carbon
(OC1,
OC2),
F-
secondary
aerosols
trace
SO42-
NO3-
BB
events,
crustal
mineral
along
with
Ti
Ca
dust
SO42-,
Na,
Al
The
increasing
some
ions
toxic
heavy
metals
(Cr,
Mn,
Cd,
Ni)
were
also
related
influence.
During
fraction
dominates
by
frequency
amount,
averaging
11.14
μg
/
m3
(38
%).
On
average,
contribute
6.77
m3
(34
%)
6.46
μg
/
(30
concentrations.
Of
three,
showed
fewer
affected
days.
study
highlighted
hotspot
zones
such
Orinoco
Middle
Magdalena
Valley
aerosols,
Caribbean
Nevado
del
Ruíz
volcano
gives
insights
future
modeling
studies
region
supports
strategies
manage
internal
external
pollution
effects
region.
Journal of Environmental Management,
Год журнала:
2024,
Номер
367, С. 122093 - 122093
Опубликована: Авг. 5, 2024
Wildfire
intensity
and
severity
have
been
increasing
in
the
Iberian
Peninsula
recent
years,
particularly
Galicia
region,
due
to
rising
temperatures
accumulating
drier
combustible
vegetation
unmanaged
lands.
This
leads
substantial
emissions
of
air
pollutants,
notably
fine
particles
(PM2.5),
posing
a
risk
public
health.
study
aims
assess
impact
local
regional
wildfires
on
PM2.5
levels
Galicia's
main
cities
their
implications
for
quality
Over
decade
(2013–2022),
data
during
wildfire
seasons
were
analyzed
using
statistical
methods
Lagrangian
tracking
monitor
smoke
plume
evolution.
The
results
reveal
notable
increase
concentration
season
(June–November)
Galicia,
surpassing
health
guidelines
extreme
events
significant
population.
Regional
analyses
indicate
that
plumes
from
Northern
Portugal
contribute
pollution
Galician
cities,
influencing
seasonality
heightened
levels.
During
extensive
wildfires,
elevated
values
persisted
several
days,
potentially
exacerbating
concerns
Galicia.
These
findings
underscore
urgency
implementing
prevention
management
measures
including
developing
effective
alerts
large-scale
improved
strategies
mitigate
cities.
Abstract.
Assessing
long-range
transport
(LRT)
of
pollutants
recognizes
that
multiple
sources
varying
scale
and
location
can
impact
air
quality.
In
the
Aburrá
Valley,
Colombia,
other
cities
in
Northern
South
America,
biomass
burning
(BB),
dust,
volcanic
degassing
have
been
identified
as
LRT
aerosols.
However,
these
on
quality
their
characterization
yet
to
be
thoroughly
studied.
This
work
investigates
influence
chemical
composition
PM2.5
during
annual
intra-annual
high-load
aerosol
events.
We
identified,
tracked,
meteorologically
characterized
events
evaluated
concentration
composition.
ran
a
Positive
Matrix
Factorization
(PMF)
for
each
kind
event,
identifying
high
contribution
organic
carbon
(OC1,
OC2),
F-
secondary
aerosols
trace
SO42-
NO3-
BB
events,
crustal
mineral
along
with
Ti
Ca
dust
SO42-,
Na,
Al
The
increasing
some
ions
toxic
heavy
metals
(Cr,
Mn,
Cd,
Ni)
were
also
related
influence.
During
fraction
dominates
by
frequency
amount,
averaging
11.14
μg
/
m3
(38
%).
On
average,
contribute
6.77
(34
%)
6.46
(30
concentrations.
Of
three,
showed
fewer
affected
days.
study
highlighted
hotspot
zones
such
Orinoco
Middle
Magdalena
Valley
aerosols,
Caribbean
Nevado
del
Ruíz
volcano
gives
insights
future
modeling
studies
region
supports
strategies
manage
internal
external
pollution
effects
region.
Abstract.
Assessing
long-range
transport
(LRT)
of
pollutants
recognizes
that
multiple
sources
varying
scale
and
location
can
impact
air
quality.
In
the
Aburrá
Valley,
Colombia,
other
cities
in
Northern
South
America,
biomass
burning
(BB),
dust,
volcanic
degassing
have
been
identified
as
LRT
aerosols.
However,
these
on
quality
their
characterization
yet
to
be
thoroughly
studied.
This
work
investigates
influence
chemical
composition
PM2.5
during
annual
intra-annual
high-load
aerosol
events.
We
identified,
tracked,
meteorologically
characterized
events
evaluated
concentration
composition.
ran
a
Positive
Matrix
Factorization
(PMF)
for
each
kind
event,
identifying
high
contribution
organic
carbon
(OC1,
OC2),
F-
secondary
aerosols
trace
SO42-
NO3-
BB
events,
crustal
mineral
along
with
Ti
Ca
dust
SO42-,
Na,
Al
The
increasing
some
ions
toxic
heavy
metals
(Cr,
Mn,
Cd,
Ni)
were
also
related
influence.
During
fraction
dominates
by
frequency
amount,
averaging
11.14
μg
/
m3
(38
%).
On
average,
contribute
6.77
m3
(34
%)
6.46
μg
/
(30
concentrations.
Of
three,
showed
fewer
affected
days.
study
highlighted
hotspot
zones
such
Orinoco
Middle
Magdalena
Valley
aerosols,
Caribbean
Nevado
del
Ruíz
volcano
gives
insights
future
modeling
studies
region
supports
strategies
manage
internal
external
pollution
effects
region.
