Earth s Future,
Journal Year:
2024,
Volume and Issue:
12(7)
Published: July 1, 2024
Abstract
Urbanization
alters
the
thermal
and
dynamic
environment
of
local
climate
system,
resulting
in
significant
impacts
on
precipitation
both
urban
adjacent
areas.
Nevertheless,
there
remains
a
gap
our
understanding
urbanization‐induced
effects
asymmetrical,
symmetrical,
other
patterns
agglomerations
(UAs)
with
divergent
background
climates
geographic
regions
at
different
timescales.
Specifically,
this
asymmetrical
change
pattern
is
characterized
by
an
increase
heavy
(or
light)
rainfall
decrease
light
heavy)
rainfall.
Here,
we
assessed
urbanization
across
18
UAs
situated
diverse
geographical
areas
China
The
results
demonstrate
that
predominantly
located
humid
region.
amplified
changes
Yangtze
River
Delta,
Pearl
Beibu
Gulf,
Middle
River,
Guanzhong,
but
exacerbated
symmetrical
some
such
as
Chengdu‐Chongqing.
Notably,
effect
demonstrates
greater
significance
hourly
scale,
exemplified
where
impact
nearly
twice
pronounced
when
compared
to
daily
scale.
Moreover,
had
either
no
or
has
negative
within
continental
arid
regions.
This
related
intensity
urbanization,
complex
topography.
finding
implies
managers
should
consider
contexts
provide
scientific
guidance
for
planning.
Earth s Future,
Journal Year:
2024,
Volume and Issue:
12(7)
Published: July 1, 2024
Abstract
Heavy
precipitation,
which
is
changing
significantly
as
Earth's
climate
warms,
can
result
in
flooding
that
seriously
damages
societies.
However,
little
known
about
how
heavy
precipitation
of
varying
durations
responds
to
the
diverse
gradients
urban
development
China.
Through
statistical
analyses
spanning
from
1990
2021,
we
have
examined
shorter‐duration
(≤3
days)
and
longer‐duration
(>3
across
a
spectrum
development,
encompassing
long‐term
built‐up
(LTB),
recently
(RTB),
rural
background
catchments
within
each
agglomeration
catchment
(UAC)
We
find
urbanization
primarily
influences
with
more
pronounced
effect
observed
LTB
catchments.
Conversely,
influence
on
appears
be
weakened
RTB
The
intensification
induced
by
humid
regions
larger
UACs,
while
weaker
UACs.
Notably,
attribution
analysis
results
geographical
detector
model
confirm
our
findings.
Anthropogenic‐related
factors
(population
density,
nighttime
light
data,
impervious
surface
percent,
land
temperature)
UACs
than
natural
(distance
coast,
wind
elevation),
dominate
events
Our
highlight
necessity
considering
spatial
difference
between
UAC
center
periphery
for
accurate
projections
effective
prevention
potential
flood
risks
future.
Water Resources Research,
Journal Year:
2022,
Volume and Issue:
58(11)
Published: Oct. 28, 2022
Abstract
Precipitation
intensity–duration–frequency
(IDF)
curves
play
a
crucial
role
in
the
design
and
planning
of
urban
infrastructure
to
reduce
risk
flooding
rainfall‐triggered
landslides.
However,
changing
rainfall
characteristics
warming
climate
render
conventional
IDF
inappropriate
due
statistical
assumption
stationarity.
In
this
study,
we
develop
vine
copula‐based
projections
future
at
sub‐daily
multi‐day
time
scales
with
multi‐model
ensemble
five
regional
simulations
over
China.
Stochastic
spatiotemporal
downscaling
precipitation
is
achieved
generate
extreme
high
spatial
(0.1°)
temporal
(3
hourly)
resolution.
These
downscaled
are
combined
by
copula
improve
reliability
accuracy
climate‐model‐based
relative
historical
observations.
Our
findings
reveal
that
stochastic
reproduces
well
based
on
observations
The
approach
outperforms
Bayesian
model
averaging
generating
more
accurate
reliable
curves.
areas
196
Chinese
cities
projected
experience
an
increase
up
30%
intensity
nearly
two
times
frequency
events
under
emission
scenario
(RCP8.5).
current
than
half
would
thus
be
inadequate
prevent
losses
caused
hazards
if
designed
solely
Compared
curves,
find
nonstationary
covariate
(i.e.,
extrapolating
trends)
likely
underestimate
failures
climate.
This
work
highlights
guidelines
China
should
upgraded
adapt
existing
Journal of Geophysical Research Atmospheres,
Journal Year:
2025,
Volume and Issue:
130(2)
Published: Jan. 16, 2025
Abstract
Heatwave
preconditioned‐heavy
rainfall
(HW_HR),
a
preconditioned
compound
event,
can
cause
more
damage
than
single
heatwave
or
rainstorm.
Both
heatwaves
and
rainstorms
be
exacerbated
by
the
presence
of
cities,
but
response
their
compounding
to
urbanization
remains
unclear
especially
at
hourly
scale.
Here,
we
investigate
spatial
temporal
responses
HW_HR
typical
urban
agglomeration,
Pearl
River
Delta,
using
observations
scenario‐based
numerical
simulations.
Compared
rural
areas,
show
that
in
areas
has
higher
probability
occurrence
mean
intensity,
its
diurnal
cycle
frequency
is
narrower,
peaking
afternoon.
The
intensity
effects
most
significant,
with
urbanization‐induced
increase
being
five
times
non‐heatwave
(noHW_HR).
Our
simulations
support
suggest
changes
are
intense
spatially
heterogeneous
relatively
weak
continuous
noHW_HR.
also
preconditioning
not
only
amplifies
key
variables
alter
atmospheric
conditions
provides
pre‐storm
unstable
environment
for
urban‐induced
warm‐dry
surface
trigger
enhance
convection.
sub‐daily
suggests
preconditioning‐induced
thermodynamic
gradually
decrease,
whereas
dynamic
as
event
approaches.
study
highlights
importance
understanding
on
events,
providing
new
insights
into
role
preconditions
water
cycle.
Environmental Research Letters,
Journal Year:
2025,
Volume and Issue:
20(3), P. 034035 - 034035
Published: Feb. 12, 2025
Abstract
Quantifying
intensification/suppression
of
precipitation
over
urban
areas
relative
to
their
rural
surroundings
can
inform
efforts
reduce
flooding.
Few
studies
have
systematically
addressed
whether
exhibit
a
higher/lower
probability
and/or
annual
total
intensification/weakening
intense
events
nearby
across
range
hydroclimatic
conditions
and
contexts.
Here
we
address
this
literature
gap
using
the
IMERG
V07
data
set
analyses
samples
drawn
from
47
conurbations
North
America.
Specifically,
quantify
whether/how
regimes
grid
cells
differ
those
in
located
100–250
km
city
center
at
similar
elevation.
As
previous
research,
there
is
evidence
that
both
are
typically
higher
cells.
However,
most
lower
upper
percentile
rates
sample
median
above
95th
than
present
Thus,
these
not,
on
average,
intensifying
high-magnitude
Further,
volume
water
accumulated
surface
during
equivalent
duration
not
areas,
20
year
return
period
values
30
min
wettest
pentad
also
areas.
The
nature
modification
strong
function
prevailing
hydroclimate.
For
example,
heaviest
rainfall
periods
enhanced
within
regional
hydroclimates
where
overall
low.
Conversely,
for
suppression
highest
wetter
hydroclimates.
