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.
Progress in Physical Geography Earth and Environment,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 3, 2025
The
contemporary
renaissance
of
the
ancient
Silk
Road
through
China’s
Belt
and
Initiative
has
brought
Xinjiang—a
pivotal
hub
along
this
historic
trade
corridor—worldwide
attention.
This
resurgence
highlights
a
critical
academic
lacuna:
despite
profound
significance
past
social
development
in
Xinjiang
comprehensively
understanding
Chinese
history,
key
factors
governing
its
long-term
evolution
remain
unclear.
Such
limitation
is
probably
constrained
by
fragmented
frontier
historical
records
lack
comprehensive
quantitative
analyses
integrating
socio-natural
systems.
study
innovatively
employs
multi-proxy
from
200
BCE
to
1912
CE,
particular
systematically
categorized
warfare
data,
using
Pearson’s
correlation,
multivariate
regression
modeling,
Granger
causality
at
annual
resolution.
Our
findings
reveal
that
region
fundamentally
driven
favorable
geopolitical
situation
rather
than
pleasant
climate,
especially
during
unified
administrations
Han,
Sui-Tang,
Qing
dynasties.
Specifically,
while
climatic
exhibit
limited
correlation
almost
no
causation
with
(geo-)political
socio-demographic
dynamics,
three
distinct
causal
chains
are
identified
different
war
types:
(1)
central
government-initiated
military
campaigns
(primary
focus
study),
(2)
local
rebellions,
(3)
external/nomadic
invasions.
Regression
models
indicate
garrison
reclamation
most
influential
predictor,
1-unit
increase
corresponding
around
0.8-unit
growth
agricultural
immigration
(
β
=
0.8),
substantially
exceeding
impacts
government-waged
0.16),
institutional
establishment
0.52),
agriculturalist
0.38)
when
serves
as
dependent
variable.
These
results
establish
coherent
framework
explaining
dynamics
over
two
millennia,
offer
an
empirically-grounded
case
for
sustainable
current
under
climate
change
well
valuable
supplements
new
insights
into
simplistic
perspective
climatic-environmental
determinism.
Climate Dynamics,
Год журнала:
2022,
Номер
61(1-2), С. 543 - 557
Опубликована: Ноя. 24, 2022
Abstract
Arid
regions
have
deficient
precipitation,
understanding
the
sources
and
transportation
of
moisture
for
precipitation
are
crucial.
This
study
examined
major
contributions
global
six
arid
regions,
which
classified
as
inland
region
(China-Mongolia)
coastal
(North
Africa,
West
Asia,
United
States,
South
Africa
Australia).
Results
indicated
that,
in
originates
mostly
from
ocean,
is
influenced
by
general
circulation,
particularly
sinking
branch
Hadley
cell.
For
(China–Mongolia),
surrounding
mountains
supply
more
than
150
mm
wet
months
due
to
ablation
glacial
snow
melting.
In
contributed
advection
large-scale
while
contribution
local
recycling
secondary.
The
available
dry
depends
on
circulation.
Moisture
10
times
that
months,
differ
greatly
months.
both
external
transported
into
has
significantly
decreasing
trend
during
period
1990–2019.
ratio
greater
globe.
decreased
suggest
a
potential
drying
trend.
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.
