Frontiers in Ecology and Evolution,
Год журнала:
2023,
Номер
11
Опубликована: Апрель 20, 2023
Xinjiang
grasslands
play
a
crucial
role
in
regulating
the
regional
carbon
cycle
and
maintaining
ecosystem
stability,
grassland
net
primary
productivity
(NPP)
is
highly
vulnerable
to
drought.
Drought
events
are
frequent
due
impact
of
global
warming.
However,
there
lack
more
systematic
research
results
on
how
NPP
responds
drought
its
heterogeneity
characterized.
In
this
study,
CASA
(Carnegie
Ames
Stanford
Application)
model
was
used
simulate
1982–2020
Xinjiang,
standardized
Precipitation
Evapotranspiration
Index
(SPEI)
calculated
using
meteorological
station
data
characterize
The
spatial
temporal
variability
from
1982
2020
were
analyzed
by
Sen
trend
method
Mann-Kendall
test,
response
characteristics
investigated
correlation
analysis
method.
showed
that
(1)
overall
increasing,
value
growing
season
>
summer
spring
autumn.
Mild
occurred
most
frequently
autumn,
moderate
spring.
(2)
A
total
64.63%
had
mainly
concurrent
effect
drought,
these
primarily
located
northern
region
Xinjiang.
strongest
plain
weakest
alpine
subalpine
grassland.
(3)
lagged
southern
grasslands,
meadows,
1-month
time
lag
desert
3-month
This
can
contribute
reliable
theoretical
basis
for
sustainable
development.
Geophysical Research Letters,
Год журнала:
2024,
Номер
51(4)
Опубликована: Фев. 13, 2024
Abstract
The
close
relationship
between
the
Indian
Ocean
Basin
mode
(IOBM)
and
summer
precipitation
in
Central
Asia
(CA)
has
been
documented
several
studies.
Nonetheless,
this
weakened
since
1990s
varies
with
Atlantic
Multi‐decadal
Oscillation
(AMO)
phase
transition.
During
cold
of
AMO
(1970–1998),
CA
was
significantly
positively
correlated
IOBM.
Conversely,
during
warm
(1999–2019),
correlation
became
insignificant.
decrease
interannual
variation
IOBM
resulted
weakening
atmospheric
heat
source
over
North
continent
south‐north
movement
subtropical
westerly
jet
(SWJ).
Along
southerly
SWJ,
exhibited
only
a
weak
positive
southern
after
1990s.
This
remarkable
contrast
impact
different
phases
offers
intriguing
possibilities
for
improving
climate
prediction
CA.
Forests,
Год журнала:
2024,
Номер
15(3), С. 505 - 505
Опубликована: Март 8, 2024
The
Tarim
Basin
is
located
in
an
arid
inland
area;
the
ecological
environment
fragile,
and
it
extremely
sensitive
to
climate
change.
For
purpose
of
studying
dynamic
changes
vegetation
response
extreme
climate,
this
study
used
Vegetation
Ecological
Quality
Index
(EQI)
as
a
indicator
calculated
12
indices
using
Rclimdex.
Pearson
correlation
analysis
was
explore
relationship
between
EQI
values
various
at
both
inter-annual
intra-annual
scales.
Additionally,
geographic
detector
employed
examine
single
interactive
effects
on
for
different
types.
following
found:
(1)
During
2000–2022,
showed
upward
trend
Basin,
increase
agricultural
fastest.
(2)
Since
2000,
warm
temperature
have
risen,
whereas
cold
declined.
warming
rate
nighttime
temperatures
exceeds
that
daytime,
precipitation
rises
intensively.
Simultaneously,
continuous
dry
days
also
increased.
(3)
On
scale,
primarily
negatively
correlated
with
most
indices,
while
positively
indices.
there
obvious
regional
concentration
diurnal
range
(DTR)
daytimes
(TX10P)
inhibitory
promoting
areas
high
low
EQI,
respectively.
extremum
intensity
effect
inhibiting
EQI.
interaction
has
greater
impact
than
index,
especially
significant
forests
shrubs.
This
provides
reference
early
warning
meteorological
disasters,
ecosystem
protection,
sustainable
management
Basin.
Frontiers in Environmental Science,
Год журнала:
2023,
Номер
10
Опубликована: Янв. 4, 2023
As
one
of
the
most
vulnerable
types
global
ecosystems
and
water
resource
systems,
arid
regions
are
sensitive
to
climate
change.
The
Xinjiang
(XJ)
region
is
an
important
part
in
Central
Asia
representative
regions.
complex
topography
underlying
surface
result
distinct
change
characteristics
XJ.
In
this
study,
XJ
was
divided
into
five
sub-regions:
Irtysh
River
Basin
(IRB),
economic
belt
on
northern
slope
Tianshan
Mountains
(NSTM),
Ili
(ILRB),
Turpan-Hami
(THB),
Tarim
(TRB).
temperature
precipitation
over
its
sub-regions
were
investigated
from
1960
2019
using
Mann-Kendall
method
cross-wavelet
analysis.
Moreover,
multi-timescale
correlations
between
variations
atmospheric
circulation
indices
explored.
results
show
significant
warming
wetting
trends
2019.
rate
0.32°C/10
a
(
p
<
0.01),
with
abrupt
during
mid-1990s.
increasing
9.24
mm/10
middle
late
1990s.
terms
seasonal
variation,
greatest
winter
(0.37°C/10
a),
whereas
increase
concentrated
summer
(3.48
a).
spatial
trend
observed
THB,
IRB,
ILRB,
NSTM,
increased
significantly
western
TRB
southern
Hurst
index
analysis
indicated
that
will
slow
future.
Climate
closely
related
at
multiple
timescales.
subtropical
high,
Northern-Hemisphere
polar
vortex
activities
Tibetan
Plateau
have
impact
annual
mean
positively
correlated
area
intensity
high
North
Africa,
Atlantic,
America,
negatively
vortex.
Tibet
Region
Atlantic
European
vortex,
Northern
Hemisphere
study
can
provide
some
references
for
scientific
assessment
accurate
prediction
PeerJ,
Год журнала:
2023,
Номер
11, С. e15256 - e15256
Опубликована: Май 10, 2023
The
Taklimakan
Desert
(TD)
is
the
largest
desert
in
China
located
Tarim
Basin
(TB)
China’s
arid
region.
This
study
a
review
of
change
precipitation
and
its
extremes
since
1961
high-impact
extreme
events
2012–2021,
particularly
2021,
with
focus
on
TD
along
surrounding
oases
mountainous
regions.The
TB
has
experienced
significantly
warmer
wetter
trends
1961,
rainfall
increased
areas
during
2000s.
In
TB,
year
2021
was
identified
as
4th
warmest
for
1961–2021,
remembered
unprecedented
events.
Three
that
occurred
are
highlighted,
including
heavy
over
Hetian
mid-June.
earliest
event
North
Bazhou
early
spring,
strongest
snowfall
Baicheng
April.
addition,
we
also
discussed
underlying
physical
mechanisms
proposed
novel
perspectives
unresolved
questions
sciences
regions.
Our
results
provide
reference
mechanism,
attribution,
high-resolution
modeling
Environment International,
Год журнала:
2024,
Номер
184, С. 108475 - 108475
Опубликована: Фев. 1, 2024
Climate
change
triggered
more
environmental
extremes.
The
joint
events
of
air
pollution
wave
and
cold
showed
higher
health
risks
than
independent
events,
but
little
evidence
is
available
for
the
spatiotemporal
features
their
co-occurrence.
To
better
understand
forecast
a
method
framework
was
developed
in
this
study.
temporal
trend
spatial
distribution
count
duration
were
measured
at
each
grid
cell
(0.5°×0.5°)
by
integrating
PM2.5
wave.
generalized
linear
mixed
model
used
to
screen
influencing
variables
that
took
into
account
socioeconomic
characteristics,
meteorological
variables,
annual
levels.
During
2000
2018,
average
4.1
±
6.8
days
ranged
from
1.0
9.7
days.
High
heterogeneity
observed
throughout
China,
with
significant
increase
Xinjiang
area
(the
largest
province
China).
most
Henan
(one
populous
provinces),
while
longest
Chongqing
(a
municipality,
one
megacities).
Areas
levels,
prolonged
wave,
durations
would
experience
events.
These
findings
can
assist
China
locating
vulnerable
areas
establishing
effective
local
early
warning
systems.
offers
broader
perspectives
on
mitigating
associated
extreme
other
countries
regions.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Фев. 25, 2024
Abstract
The
intensification
of
heatwaves
dues
to
climate
change
is
a
significant
concern,
with
substantial
impacts
on
ecosystems
and
human
health,
particularly
in
developing
countries.
This
study
utilizes
NASA
Earth
Exchange
Global
Daily
Downscaled
Projections
(NEX-GDDP-CMIP6)
projected
population
data
accounting
for
China’s
policies
project
changes
various
grades
(light,
moderate,
severe)
the
exposure
(PEH)
Xinjiang
under
three
shared
socioeconomic
pathways
(SSP1–2.6,
SSP2-4.5,
SSP5-8.5).
results
show
that
number
days
intensity
are
increase.
Heatwaves
occurring
will
predominantly
be
severe
(SHW)
long-term
SSP5-8.5
scenario,
SHW
increase
by
62
±
18.4
compared
reference
period.
Changes
anticipated
influence
PEH,
estimating
light,
(LPEH,
MPEH,
SPEH)
at
534.6
64
million,
496.2
43.5
1602.4
562.5
million
person-days,
respectively,
scenario.
spatial
distribution
PEH
consistent
period,
high
values
persisting
Urumqi,
Kashgar
Hotan.
primarily
driven
effects,
followed
interactive
while
effects
contribute
least.
Therefore,
mitigating
crucial
reduce
Xinjiang.
Remote Sensing,
Год журнала:
2023,
Номер
15(3), С. 686 - 686
Опубликована: Янв. 24, 2023
The
response
of
vegetation
spring
phenology
to
climate
warming
has
received
extensive
attention.
However,
there
are
few
studies
on
the
extreme
events.
In
this
study,
we
determined
start
growing
season
(SOS)
for
three
types
in
temperate
China
from
1982
2015
using
Global
Inventory
Modeling
and
Mapping
Study’s
third-generation
normalized
difference
index
estimated
25
We
analyzed
temporal
trends
SOS
events
quantified
relationships
between
all-subsets
regression
methods.
found
that
was
significantly
advanced,
with
an
average
rate
0.97
days
per
decade
over
study
period.
Interestingly,
mainly
associated
temperature
extremes
rather
than
precipitation
influenced
by
frost
(FD,
r
=
0.83)
mean
daily
minimum
(TMINMEAN,
0.34)
all
types.
dominant
influencing
factors
were
vegetation-type-specific.
For
mixed
forests,
most
TMINMEAN
(r
0.32),
while
grasslands
barren
or
sparsely
vegetated
land,
FD
>
0.8).
Our
results
show
substantially
affected
but
events,
low
likely
drive
phenology.
