Earth s Future,
Journal Year:
2025,
Volume and Issue:
13(4)
Published: April 1, 2025
Abstract
Recent
decades
have
seen
substantial
variations
in
the
physicochemical
characteristics
of
atmospheric
aerosols
with
expected
continued
changes
future.
While
sustained
global
emission
controls
yielded
significant
environmental
benefits,
associated
climate
penalty
from
complex
radiative
effects
has
induced
additional
warming,
raising
public
concern.
Our
study
reveals
that
increased
coarse
particles
enhance
fine
particle
coagulation,
contributing
to
higher
levels
and
a
reduction
peak
size,
thereby
scattering
more
solar
radiation
mitigating
warming
reduced
Europe.
From
1999
2021,
offset
24.6%
(26.3%)
cooling
effect
at
top
(ground)
atmosphere
reductions.
findings
highlight
but
role
aerosol
size
influencing
budget,
offering
potential
relief
for
concerns
bolstering
emissions
efforts,
important
European
implications
amid
ongoing
anthropogenic
cuts.
Remote Sensing,
Journal Year:
2022,
Volume and Issue:
14(17), P. 4414 - 4414
Published: Sept. 5, 2022
In
recent
years,
climate
change
and
the
intervention
of
anthropogenic
activities
have
altered
seasonal
features
Asian
dust
storms.
This
may
also
cause
variations
(including
occurrence
frequency
optical/microphysical
properties)
in
aerosols
transported
to
downstream
regions.
The
Jianghan
Plain
is
dramatically
influenced
by
multiple
sources
due
its
geographical
location
central
China.
this
study,
we
focused
on
climatology
over
based
15-year
(2006–2021)
continuous
space-borne
observations
Cloud-Aerosol
Lidar
with
Orthogonal
Polarization
(CALIOP)
as
well
Modern-Era
Retrospective
Analysis
for
Research
Applications
version
2
(MERRA-2)
reanalysis
data.
A
typical
event
that
intrudes
was
studied
detail.
According
statistical
results,
frequently
intrude
into
spring
winter,
frequencies
(under
cloud
free
condition
hereafter)
exceeding
0.70
higher
altitudes
4–6
km.
declined
approximately
0.40
autumn
nearly
zero
summer,
while
plumes
were
generally
located
at
lower
1–3
observed
simultaneously
linked
Taklimakan
Desert
Gobi
mainly
originated
from
winter
autumn.
particles
distributed
below
4-km
altitude,
largest
extinction
coefficients
mass
concentrations
spring.
all
seasons,
particle
depolarization
ratios
are
0.1–0.2
suggesting
a
possible
mix
local
aerosols.
mean
column
showed
an
evident
declining
trend
210
µg
m−2
2006
100
2021
Plain,
attributed
reduced
activity
source
regions
dust.
Remote Sensing,
Journal Year:
2022,
Volume and Issue:
14(2), P. 266 - 266
Published: Jan. 7, 2022
Aerosols
can
affect
vertical
thermal
structure
during
heavily
polluted
episodes
(HPEs).
Here,
we
selected
four
typical
HPEs
in
2018,
which
were
further
subdivided
into
dust
and
haze
events.
The
distribution
of
aerosols
extinction
coefficient
(EC)
variations
columnar
optical
properties
investigated
based
on
sun-photometer
Lidar
observation
at
an
urban
site
Beijing.
characteristics
shortwave
radiative
heating
rate
(HR)
studied
using
NASA/Goddard
transfer
model
along
with
observational
data.
In
the
episode,
EC
layer
is
less
than
1.5
km
shows
strong
scattering,
single-scattering
albedo
(SSA440nm)
~0.97.
effects
are
observed
middle
upper
atmosphere,
slight
found
lower
layer.
mean
HR
within
be
up
to
16.3
K
day−1
1.27
km−1,
whereas
0.5
only
1.3
day−1.
present
absorption
SSA440nm
~0.88,
would
heat
atmosphere
promote
turbulence,
height
2.0–3.5
km.
addition,
produced
cooling
near
surface.
Therefore,
accurate
measurement
great
significance
for
modeling
direct
effects.
Remote Sensing,
Journal Year:
2023,
Volume and Issue:
15(6), P. 1581 - 1581
Published: March 14, 2023
Fires
occur
seasonally
in
Southern
Africa,
from
June
to
November,
increasing
tropospheric
aerosol
loading
and
triggering
harmful
consequences
for
the
environment
human
health.
This
study
aims
examine
13
years
of
optical
characteristics
types
over
Africa
Reunion
Island.
Using
AERONET
sun
photometers
MODIS
observations,
we
found
that
a
high
depth
Angström
exponent
are
associated
with
two
predominant
aerosols
(biomass
burning/urban
industrial
mixed
type)
throughout
spring
season.
According
CALIOP
major
occurrence
frequencies
above
10%
polluted
continental/smoke,
dust,
elevated
smoke,
whereas
clean
continental,
dusty
marine
have
below
1%.
In
comparison
other
seasons,
vertical
profiles
smoke
different
shapes
spring,
seasonal
shift
peak
altitude
(from
3–4
km),
when
fire
activity
is
at
its
maximum.
At
these
altitudes,
northern
regions
presented
32%
on
average,
while
lower
values
were
southern
or
farthest
(<10–20%
average).
The
Lagrangian
HYSPLIT
model
back-trajectories
demonstrated
eastward
transport,
air
masses
South
America
Atlantic
Ocean
recirculate
around
sites.
mainly
derived
active
biomass
burning
areas
near
sites
and,
lesser
extent,
remote
sources
such
as
America.
Abstract.
Although
a
remarkable
reduction
in
the
frequency
of
sand
and
dust
storms
(SDSs)
past
several
decades
has
been
reported
over
northern
China
(NC),
two
unexpected
mega
SDSs
occurred
on
March
15–20,
2021
27–29,
(abbreviated
as
“3.15”
“3.27”
SDS
events),
which
reawakened
widespread
concern.
This
study
characterizes
origins,
transport
processes,
magnitudes
impact,
meteorological
causes
these
events
using
long-term
(2000–2021)
optical
depth
(DOD)
dataset
retrieved
from
MODIS
measurements
comprehensive
set
multiple
satellite
ground-based
observations
combined
with
atmospheric
reanalysis
data.
During
3.15/3.27
event,
invasion
plumes
greatly
degraded
air
quality
large
areas
NC,
reaching
extremely
hazardous
levels,
maximum
daily
mean
PM10
concentration
7058
µg
m−3
(2670
m−3)
recorded
15
(28).
CALIOP
show
that
during
3.15
event
plume
was
lifted
to
an
altitude
4–8
km,
its
range
impact
extended
source
eastern
coast
China.
In
contrast,
lifting
height
3.27
lower
than
also
confirmed
by
Lidar
observations.
The
MODIS-retrieved
DOD
data
registered
massive
most
intense
episode
same
period
history
decades.
These
extreme
were
associated
both
circulation
extremes
local
anomalies
favored
enhanced
emissions
Gobi
Desert
(GD)
across
southern
Mongolia
NC.
Meteorological
analysis
revealed
triggered
exceptionally
strong
Mongolian
cyclone
generated
at
nearly
location
(along
central
plateau
Inner
Mongolia)
conjunction
surface-level
cold
high-pressure
system
rear,
albeit
differences
magnitude
spatial
extent
impact.
GD,
early
melting
spring
snow
caused
near-surface
temperature
regions,
together
negative
soil
moisture
induced
decreased
precipitation,
formed
drier
barer
surfaces,
allowed
for
increased
into
atmosphere
strongly
surface
winds
cyclone.
