Remote Sensing,
Journal Year:
2024,
Volume and Issue:
16(10), P. 1781 - 1781
Published: May 17, 2024
Using
CloudSat/CALIPSO
satellite
data
and
ERA5
reanalysis
from
2006
to
2010,
the
effects
of
aerosols
on
ice-
mixed-phase,
single-layer,
non-precipitating
clouds
over
Tibetan
Plateau
during
nighttime
in
MAM
(March
May),
JJA
(June
August),
SON
(September
November),
DJF
(December
February)
seasons
were
examined.
The
results
indicated
following:
(1)
macrophysical
microphysical
characteristics
mixed-phase
exhibit
a
nonlinear
trend
with
increasing
aerosol
optical
depth
(AOD).
When
logarithm
AOD
(lnAOD)
was
≤−4.0,
nights,
cloud
thickness
ice
particle
effective
radius
ice-phase
clouds,
water
path
number
concentration
liquid
fraction
all
decreased;
top
height,
droplet
concentration,
decreased.
lnAOD
>−4.0,
base
fraction,
increased;
increased.
(2)
Under
condition
excluding
meteorological
factors,
including
U-component
wind,
V-component
pressure
vertical
velocity,
temperature,
relative
humidity
at
atmospheric
heights
near
average
within
cloud,
as
well
precipitable
vapor,
convective
available
potential
energy,
surface
pressure.
During
nights.
an
increase
may
have
led
decrease
layers,
reduction
values.
In
contrast,
when
contribute
elevated
for
clouds.
changes
various
be
influenced
by
both
factors.
Journal of Geophysical Research Atmospheres,
Journal Year:
2023,
Volume and Issue:
128(23)
Published: Dec. 4, 2023
Abstract
During
6–7
May
2017,
a
record‐breaking
nocturnal
rainfall
event
occurred
in
Guangzhou,
China,
and
it
was
typical
warm‐sector
heavy
under
weak
synoptic
forcing.
A
prior
observational
study
by
the
authors
revealed
that
warm‐rain
microphysical
processes
were
dominant
responsible
for
precipitation.
In
this
study,
double‐moment
Morrison,
Thompson
NSSL
microphysics
schemes
WRF
are
evaluated
against
polarimetric
radar
observations
their
ability
of
reproducing
observed
characteristics.
The
scheme
shows
greatest
fidelity
to
raindrop
size
distribution
(RSD)
median
value,
corresponding
most
amount
precipitation
forecast.
While
Morrison
simulations
overestimate
(underestimate)
(number
concentration),
exhibiting
continental‐type
convective
three
experiments
slightly
differential
reflectivity
(
Z
DR
),
but
significantly
underestimate
specific
phase
K
DP
)
liquid
water
content
about
30%–50%,
implying
undervaluation
number
medium‐sized
raindrops.
Examinations
occurrence
frequencies
,
mass‐weighted
diameter,
logarithmic
normalized
intercept
parameter
rain
suggest
all
fail
reproduce
full
variability
RSD
extreme
rainfall.
vertical
variations
parameters
Kumjian‐Ryzhkov
space
collision–coalescence
is
process
simulated
too
weak.
This
may
be
attributed
misrepresented
near
melting
layer,
where
raindrops
with
lower
concentration
larger
sizes
cannot
grow
through
as
actively.
Environmental Science Atmospheres,
Journal Year:
2024,
Volume and Issue:
4(3), P. 387 - 407
Published: Jan. 1, 2024
Entrainment-mixing
processes
of
fog
with
the
surrounding
ambient
air
are
extremely
intricate
and
impose
significant
effects
on
microphysical
radiative
properties
fog.
Environmental Research Letters,
Journal Year:
2024,
Volume and Issue:
19(4), P. 044047 - 044047
Published: March 19, 2024
Abstract
Terrestrial
evapotranspiration
plays
a
critical
role
in
drought
monitoring
and
water
resource
management.
Changes
are
significantly
influenced
by
cloud-related
precipitation
radiation
effects.
However,
the
impact
of
cloud
amount
(CA)
on
through
its
influence
remains
uncertain,
especially
transition
zone
affected
East
Asian
summer
monsoon
(EASM),
which
limits
understanding
cycle.
Therefore,
this
study
deeply
explores
CA
potential
physical
mechanisms
Northwest
China.
The
results
show
that
correlation
between
31-year
average
is
negative
only
semi-arid
region
positive
other
climatic
regions
This
unique
related
to
change
pattern
caused
weak
EASM.
Smaller
monsoons
more
short-wave
reaching
surface,
larger
sensible
heat,
weaker
convective
inhibition.
Consequently,
proportion
clouds
(CCs)
increases
from
these
CCs
enhances
evapotranspiration.
Less
potentially
exacerbates
aridity
These
emphasize
type
It
well
known
global
warming
can
with
CCs.
sheds
new
light
under
warming.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: May 4, 2024
Abstract
This
paper
provides
the
first
observational
analysis
of
how
droplet
separation
is
impacted
by
flinging
action
microscale
vortices
in
turbulent
clouds
over
a
select
radii
range
and
they
vary
cloud
cores
along
peripheral
edges.
It
premised
that
this
mechanism
initiates
within
volume
soon
after
condensational
growth,
largely
core,
operates
until
exceed
20–30
µm
when
effect
fades
rapidly.
New
observations
are
presented
showing
also
impact
settling
rates
droplets
critical
size
(6–18
µm)
causing
them
to
sediment
faster
than
still
air
affecting
swept
volumes
thereby
impacting
rain
initiation
formation.
Large-scale
atmospheric
models
ignore
these
effects
linked
rapid
growth
during
early
stages
conversion.
Previous
studies
on
spatial
organization
edges
inside
deep
core
have
shown
homogeneous
Poisson
statistics,
indicative
presence
vigorous
in-cloud
mixing
process
at
small
scales
obtained,
contrast
an
inhomogeneous
distribution
In
paper,
it
established
marked
region,
homogeneity
can
be
vortical
activity
which
flings
6–18
outward.
The
typical
radius
trajectories
or
flung
around
correlates
with
interparticle
distance
strongly.
correlation
starts
diminish
as
one
proceeds
from
central
fringes
because
added
entrainment
cloud-free
air.
These
results
imply
augmented
small-scale
interaction
prior
other
more
large-scale
processes
involving
mixing.
study,
combining
amplified
velocities
included
Weather
Research
Forecasting-
LES
case
study.
Not
only
significant
differences
observed
morphology
compared
baseline
case,
but
‘enhanced’
shows
commencement
rainfall
intense
precipitation
‘standard’
case.
modelled
equilibrium
raindrop
spectrum
agrees
better
enhanced
sedimentation
mediated
calculations
where
still-air
terminal
used.
Remote Sensing,
Journal Year:
2024,
Volume and Issue:
16(10), P. 1781 - 1781
Published: May 17, 2024
Using
CloudSat/CALIPSO
satellite
data
and
ERA5
reanalysis
from
2006
to
2010,
the
effects
of
aerosols
on
ice-
mixed-phase,
single-layer,
non-precipitating
clouds
over
Tibetan
Plateau
during
nighttime
in
MAM
(March
May),
JJA
(June
August),
SON
(September
November),
DJF
(December
February)
seasons
were
examined.
The
results
indicated
following:
(1)
macrophysical
microphysical
characteristics
mixed-phase
exhibit
a
nonlinear
trend
with
increasing
aerosol
optical
depth
(AOD).
When
logarithm
AOD
(lnAOD)
was
≤−4.0,
nights,
cloud
thickness
ice
particle
effective
radius
ice-phase
clouds,
water
path
number
concentration
liquid
fraction
all
decreased;
top
height,
droplet
concentration,
decreased.
lnAOD
>−4.0,
base
fraction,
increased;
increased.
(2)
Under
condition
excluding
meteorological
factors,
including
U-component
wind,
V-component
pressure
vertical
velocity,
temperature,
relative
humidity
at
atmospheric
heights
near
average
within
cloud,
as
well
precipitable
vapor,
convective
available
potential
energy,
surface
pressure.
During
nights.
an
increase
may
have
led
decrease
layers,
reduction
values.
In
contrast,
when
contribute
elevated
for
clouds.
changes
various
be
influenced
by
both
factors.
