В
данной
работе
приведены
результаты
непрерывных
измерений
аэрозольной
оптической
толщи
(АОТ)
в
летний
период
с
2019
по
2023
гг.
атмосфере
юго-восточного
побережья
оз.
Байкал
(ст.
«Боярский»)
помощью
наземных
и
спутниковых
наблюдений
их
анализ.
Максимальная
замутненность
атмосферы
наблюдалась
2021
гг.,
АОТ
на
длине
волны
0,5
мкм
варьировал
от
0,23
до
0,27
крупномасштабных
лесных
пожаров
бореальных
лесах
Сибири
Якутии.
Несмотря
то,
что
2022-2023
количество
площадь
уменьшились,
отдельные
дни
отмечено
увеличение
из-за
переноса
дымового
аэрозоля,
подтверждается
данными
MODIS
(MAIAC)
траекторным
анализом
движения
воздушных
масс
HYSPLIT.
По
результатам
отбора
проб
проведен
химический
анализ
состава
аэрозолей,
доминирующими
ионами
аэрозолей
являются
Cl-,
K+,
SO4^2-,
Ca^2+,
Na+.
Данные
ионы
имеют
хорошую
взаимосвязь
K+
(r=0.8),
который
является
ключевым
показателем
выбросов
сжигания
биомассы.
This
work
presents
the
results
of
continuous
measurements
aerosol
optical
depth
(AOD)
during
summer
period
from
to
in
atmosphere
southeastern
coast
Lake
Baikal
(station
"Boyarsky")
using
ground-based
and
satellite
observations
their
analysis.
The
maximum
atmospheric
turbidity
was
observed
2021,
with
AOD
at
a
wavelength
0.5
µm
varying
0.23
0.27
large-scale
wildfires
boreal
forests
Siberia
Yakutia.
Although
number
area
decreased
2022-2023,
an
increase
noted
on
certain
days
due
transport
smoke
aerosol,
as
confirmed
by
data
HYSPLIT
trajectory
analysis
air
mass
movement.
Chemical
composition
conducted
based
collected
samples,
dominant
ions
being
show
good
correlation
which
is
key
indicator
biomass
burning
emissions.
Frontiers in Environmental Science,
Год журнала:
2024,
Номер
12
Опубликована: Фев. 14, 2024
Brown
carbon
(BrC)
is
an
important
light-absorbing
component
of
organic
(OC),
causing
large
uncertainty
in
aerosol
radiative
forcing
evaluation
and
being
related
to
health
issues
as
well.
Knowledge
BrC
atmospheric
background
station
beneficial
understand
its
role
a
changing
climate.
A
year-long
sampling
campaign
was
conducted
at
Nanling
get
comprehensive
knowledge
WS-BrC,
total
seventy-two
PM
2.5
samples
throughout
year
were
used.
Light
absorption
fluorescence
spectra
WSOC
analyzed
synchronously
using
spectrophotometer.
The
low
levels
,
OC,
elemental
(EC)
conferred
site.
optical
properties
WS-BrC
characterized
excitation-emission
matrix
(EEM)
spectroscopy.
made
significant
contribution
(365
nm,
18%
±
10%)
carbonaceous
absorption.
mass
efficiency
(MAE)
0.81
0.34
m
2
gC
–1
varies
among
seasons
due
the
different
sources
or
processing.
Three
EEM
fluorescent
components
identified
by
parallel
factor
(PAFAFAC)
analysis,
including
two
humic-like
substances
(HULIS,
C1,
C2),
one
phenolic-like
component.
HULIS
accounted
for
approximately
70%
intensities.
Primary
combustion
emissions
showed
enhanced
activity
during
winter
spring
seasons,
but
there
no
influences
on
spring.
Secondary
contributed
significantly
winter,
summer,
autumn
(all
exceeding
50%),
except
Photooxidation
process
formation
secondary
autumn,
may
be
another
pathway
i.e.,
ammonia
pathway.
This
study
contributes
our
understanding
atmosphere.
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
Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 12, 2025
This
study
investigates
the
impacts
of
wildfires
on
nanoparticle
characteristics
and
exposure
disparities
in
Toronto,
integrating
data
from
a
large-scale
mobile
monitoring
campaign
fixed-site
measurements
during
unprecedented
2023
wildfire
season.
Our
results
reveal
changes
particle
days,
with
number
concentrations
decreasing
by
60%
diameter
increasing
30%
compared
to
nonwildfire
days.
Moreover,
median
lung
deposited
surface
area
(LDSA)
levels
rose
31%
events.
We
employed
gradient
boosting
models
estimate
near-road
LDSA
both
The
ratio
(wildfire/nonwildfire)
exceeded
2.0
certain
areas
along
highways
downtown
Toronto.
Furthermore,
our
findings
show
that
marginalized
communities
faced
greater
increases
than
less
ones.
Under
conditions,
difference
between
most
least
groups
was
16%
for
recent
immigrants
visible
minorities
7%
seniors
children,
statistically
significant.
delivers
critical
insights
into
spatiotemporal
variations
periods,
demonstrating
substantial
health
risks
posed
increased
inequitable
distribution
these
among
Toronto's
diverse
population.
Communications Earth & Environment,
Год журнала:
2025,
Номер
6(1)
Опубликована: Апрель 21, 2025
Wildfire
particulate
matter
from
Canadian
forest
fires
significantly
impacted
the
air
quality
in
northeastern
United
States
during
summer
of
2023.
Here,
we
used
real-time
and
time-integrated
instrumentation
to
characterize
physicochemical
properties
radiative
effects
wildfire
reaching
metropolitan
areas
New
Jersey/
York
this
extreme
incident.
The
forcing
-352.4
W/m2
derived
here
based
on
measured
optical
explains,
some
extent,
ground
level
temperature
reduction
about
3
°C
observed
City
Such
negative
densely
populated
megacities
may
limit
natural
ventilation,
increase
residence
time
background
pollutants,
exacerbating
public
health
risks.
This
study
highlights
importance
their
potential
implications
for
climate,
health.
Heliyon,
Год журнала:
2024,
Номер
10(5), С. e26746 - e26746
Опубликована: Март 1, 2024
This
study
examined
the
influence
of
fireworks
on
atmospheric
aerosols
over
Southern
Indian
city
Hyderabad
during
festival
Diwali
using
mass
closure,
stable
carbon
isotopes
and
EPA-PMF
model.
Identification
chemical
species
in
day
night
time
aerosol
samples
for
2019
2020
weeks
showed
increased
concentrations
NH4+,
NO3−,
SO42−,
K+,
organic
(OC),
Ba,
Pb
Li,
which
were
considered
as
tracers
fireworks.
PM10
source
apportionment
was
done
inorganic
(trace
elements,
major
ions)
carbonaceous
(organic
elemental
carbon;
OC
&
EC)
constituents,
along
with
isotopic
compositions
TC
EC.
K+/Na+
∼1
K+nss/OC
>
0.5
indicated
contribution
from
High
Na+,
Cl−
SO42−
suggested
presence
deliquescent
salts
NaCl,
NH4NO3
(NH4)2SO4.
TAE/TCE
>1
H+
exclusion,
indicating
possible
H2SO4
NH4HSO4
aerosols.
Pb,
Sb,
Sr
Fe
by
305
(87),
12
(11),
(3),
3
(2)
(4)
times
nights,
compared
to
pre-Diwali
(2020),
are
metallic
δ13CTC
δ13CEC
closely
resembled
that
diesel
C3
plant
burning
emissions,
meagre
firecrackers
period.
The
relatively
depleted
than
δ13COC.
For
both
years,
δ13COC-EC
(δ13COC
-
δ13CEC)
positive,
suggesting
photochemical
aging
long-range
transport,
while
post-Diwali
2020,
negative
high
OC/EC
ratio,
implying
secondary
formation.
toluene
week
contributed
fresh
SOA
formation,
reacted
precursor
12C,
leading
13C
depletions.
Eight-factored
highest
residue/waste
burning,
followed
marine/dust
soil
fireworks,
least
solid
fuel/coal
combustion.