Abstract.
Stratospheric
aerosols
are
long-lived
and
play
a
critical
role
in
the
global
radiation
budget.
Over
past
decade,
contributions
to
stratospheric
from
different
sources
have
changed
due
weaker
volcanic
activity
more
frequent
wildfire
events.
However,
long-term
observations
of
monitoring
major
emission
events
remain
insufficient,
particularly
at
middle
low
latitudes.
In
this
study,
we
analyze
vertical
distribution,
optical
properties,
radiative
forcing
using
ground-based
polarization
lidar
Wuhan
(30.5°
N,
114.4°
E)
2010
2021.
The
aerosol
depth
(sAOD)
generally
stabilized
around
0.0023
without
significant
annual
variation.
Several
cases
wildfire-induced
smoke
were
observed.
Volcanic
Nabro
(2011)
Raikoke
(2019)
eruptions
(both
boreal
summer)
increased
sAOD
4.8
times
background
level
during
stratospheric-quiescent
period
(January
2013
August
2017).
Tracers
Canadian
summer
2017
was
observed
twice:
19–21
km
on
14–17
September
20–23
28–31
October,
with
plume-isolated
AOD
0.002–0.010
particle
linear
depolarization
ratio
δp
0.14–0.18,
indicating
dominance
non-aged
particles.
During
these
summertime
events,
injected
captured
by
large-scale
Asian
monsoon
anticyclone
(AMA),
confining
transport
pathway
mid-latitude
Asia.
On
8–9
November
2020,
plumes
originating
California
October
2020
appeared
16–17
km,
0.007
mean
0.13.
Regarding
seasonal
variation,
cold
half-year
(0.0026)
is
24
%
larger
than
warm
(0.0021)
stronger
meridional
tropics
-0.05
W·m-2
-0.28
when
largely
injected.
These
findings
contribute
our
understanding
patterns
over
Asia
serve
as
important
database
for
validation
model
outputs.
International Journal of Climatology,
Год журнала:
2022,
Номер
42(11), С. 6042 - 6054
Опубликована: Март 6, 2022
Abstract
Aerosol
vertical
distribution
generally
determines
their
health
impacts
and
climate
effects.
By
using
long‐term
(2007–2019)
CALIPSO
lidar
measurements,
we
present
a
large‐scale
insight
into
the
climatology
of
aerosol
types
structure
over
East
Asia.
Despite
low
sampling
frequency,
comparison
with
MODIS
optical
depth
(AOD)
shows
that
integrated
CAIPSO
extinction
can
reasonably
reproduce
spatial
patterns
loading.
With
unique
advantage
active
detection,
reveals
an
obvious
enhancement
night‐time
AOD
due
to
worse
diffusion
conditions.
Moreover,
long‐range
transport
different
aerosols
including
dust,
polluted
smoke
has
substantial
contribution
loading
Pure
dust
particles
are
mainly
concentrated
deserts
notable
belts
(dust
>
0.2
at
532
nm)
along
downwind
regions
during
winter
spring.
contrast,
is
prevalent
downstream
eastern
China
much
higher
AODs
throughout
year.
In
particular,
(~0.5)
in
rather
than
spring,
which
consistent
seasonal
occurrences.
Smoke
usually
appear
southern
China.
The
top
heights
around
4–6
km,
having
upstream
regions.
these
provide
significant
constraint
for
associated
studies
air
quality
Remote Sensing,
Год журнала:
2022,
Номер
14(12), С. 2809 - 2809
Опубликована: Июнь 11, 2022
The
monitoring
and
tracking
of
urban
air
pollution
is
a
challenging
environmental
issue.
approach
synchronous
3-D
detection
wind
using
solo
coherent
Doppler
lidar
(CDWL)
developed
demonstrated.
distribution
pollutant
depicted
by
the
backscatter
coefficient
based
on
signal
intensity
CDWL.
Then,
high-resolution
field
derived
to
track
local
source
with
its
diffusion
analyze
transboundary
episodes.
experimentally
implemented
in
chemical
industry
park.
Smoke
plumes
caused
point
pollutions
are
captured
well
plan
position
indicator
(PPI)
scanning
low
elevation.
A
typical
located,
combining
trajectory
smoke
plume
horizontal
vector.
In
addition,
transport
dust
storms
detected
vertical
profile
pattern,
which
consistent
results
national
stations
backward
models.
Our
present
work
provides
significant
sources,
paths,
heights
solo-CDWL
system.
Remote Sensing,
Год журнала:
2022,
Номер
14(6), С. 1416 - 1416
Опубликована: Март 15, 2022
Central
Asia
is
one
of
the
most
important
sources
mineral
saline
dust
worldwide.
A
comprehensive
understanding
Asian
transport
essential
for
evaluating
its
impacts
on
human
health,
ecological
safety,
weather
and
climate.
This
study
first
puts
forward
an
observation-based
climatology
flux
by
using
3-D
detection
Cloud-Aerosol
LiDAR
with
Orthogonal
Polarization
(CALIOP).
The
seasonal
difference
downstream
contribution
are
evaluated
compared
those
Modern-Era
Retrospective
Analysis
Research
Applications,
version
2
(MERRA-2).
can
be
transported
not
only
southward
in
summer
under
effect
South
monsoon,
but
also
eastward
other
seasons
control
westerly
jet.
Additionally,
across
Pamir
Plateau
to
Tibetan
non-negligible,
especially
during
spring
(with
a
rate
150
kg
m−1
day−1).
annual
CALIOP-based
(164.01
Tg)
2.1
times
that
East
(78.36
Tg).
attributed
blocking
higher
terrain
between
Asia.
contributions
from
MERRA-2
0.36
0.84
CALIOP,
respectively.
implies
overestimation
wet
dry
depositions
model,
low
latitude
zone.
quantification
allows
better
cycle,
supports
calibration/validation
aerosol-related
modules
regional
global
climate
models.
