Geophysical Research Letters,
Год журнала:
2024,
Номер
51(2)
Опубликована: Янв. 20, 2024
Abstract
The
impact
of
mid‐Pliocene
boundary
conditions
on
Afro‐Asian
summer
monsoon
(AfroASM)
rainfall
is
examined
using
the
fully
coupled
Earth
System
Model
EC‐Earth3‐LR.
Our
focus
lies
effects
varying
CO
2
concentration,
diminished
ice
sheets
and
vegetation
dynamics.
We
find
that
enhanced
AfroASM
predominantly
caused
by
“warmer‐gets‐wetter”
mechanism
due
to
elevated
levels.
Additionally,
sheet,
similar
in
size
era,
creates
several
indirect
effects.
These
include
sea
ice‐albedo
feedback
inter‐hemispheric
atmosphere
energy
transport.
Such
influences
result
southward
shift
Hadley
circulation
formation
Pacific‐Japan
pattern,
leading
reduced
North
African
South
Asian
regions
but
increased
East
region.
Interestingly,
while
dynamic
has
a
minimal
direct
effect
rainfall,
it
significantly
mid‐high
latitudes
Hemisphere
enhancing
water
vapor
feedback.
International Journal of Applied Earth Observation and Geoinformation,
Год журнала:
2024,
Номер
127, С. 103664 - 103664
Опубликована: Янв. 21, 2024
Recently,
the
warm–wet
tendency
in
northwestern
China
has
become
a
hot
research
topic.
How
does
vegetation
change
under
this
tendency,
and
what
are
impacts
of
climate
on
vegetation?
To
address
these
questions,
dynamic
variations
their
relationships
with
five
factors
(i.e.,
Pre:
precipitation,
Tmp:
temperature,
SM:
root
zone
soil
moisture,
Vap:
vapor
pressure,
Pet:
potential
evapotranspiration)
across
Xinjiang
comprehensively
analyzed
during
period
1982–2021.
The
spatiotemporal
using
normalized
difference
index
(NDVI)
leaf
area
(LAI),
employing
Mann–Kendall
(M−K)
empirical
orthogonal
function
(EOF)
approaches.
key
findings
indicate
that
significant
greening
trend
is
observed,
value
0.00226
m2m-2year−1
according
to
annual
LAI.
For
seasonal
variations,
had
largest
increasing
summer
(JJA:
June,
July,
August)
compared
other
seasons,
values
0.000876
year−1
0.00382
for
NDVI
LAI,
respectively
(p
<
0.05).
spring
(MAM:
March,
April,
May)
growing
season
(GS)
also
have
trends
based
Spatially,
approximately
40
%
areas
an
trend,
indicating
which
mainly
distributed
mountainous
Xinjiang.
EOF
results
suggest
trend.
significantly
positively
correlated
factors,
illustrates
positive
influence
vegetation.
Our
study
helps
better
understand
long-term
provides
important
scientific
basis
net
primary
production
(NPP)
carbon
cycle
Global Environmental Change,
Год журнала:
2024,
Номер
86, С. 102826 - 102826
Опубликована: Март 11, 2024
A
recent
"warming-and-wetting"
trend
over
China's
drylands
has
raised
widespread
attention
in
the
scientific
community.
Based
on
observations
and
model
projections
of
temperature
precipitation,
this
study
shows
that
warming
regional
wetting
is
becoming
stronger.
Over
past
60
years,
increased
at
a
rate
0.34
°C/10a,
much
higher
than
China
(0.29
°C/10a)
globally
(0.22
°C/10a).
The
been
primarily
apparent
western
part
since
1980s,
particularly
mountainous
areas.
In
northeast
edge
Qinghai-Tibet
Plateau,
exceeded
30
mm/10a.
possible
cause
increase
precipitation
may
be
convective
also
concentrating
Model
show
weak
strong
future
under
RCP2.6
RCP8.5
scenarios,
respectively.
Precipitation
will
slightly
mid-21st
century
then
decrease
slowly
until
end
21st
scenario.
comparison,
scenario,
it
by
15–25%
century.
Atmosphere,
Год журнала:
2023,
Номер
14(7), С. 1188 - 1188
Опубликована: Июль 23, 2023
Drought
has
a
direct
impact
on
regional
agricultural
production,
ecological
environment,
and
economic
development.
The
northwest
region
of
China
is
an
important
production
area,
but
it
also
one
the
most
serious
areas
water
shortage
due
to
drought
little
rain.
It
great
significance
make
full
use
resources
clarify
temporal
spatial
distribution
characteristics
regime
in
Northwest
China.
Based
Standardized
Precipitation
Evapotranspiration
Index
(SPEI),
this
paper
used
methods
Mann–Kendall
non-parameter
trend,
mutation
test,
Morlet
wavelet
analysis
explore
from
1961
2017.
results
showed
that
SPEI
annual
seasonal
scales
differed
slightly
different
regions,
southeast,
was
generally
wetter
drier.
intensity
(Sij)
had
step-like
with
range
1.14–1.98.
Sij
analysis,
frequency
moderate,
followed
by
extreme
drought,
severe
light
drought.
inter-annual
station
proportion
(Pj)
ranged
7.4%
84.1%.
A
total
25,
18,
7,
5
years
pan-regional
partial
local
occurred,
respectively,
based
Pj
analysis.
Moreover,
whole
study
period,
changes
tended
cause
humidification
degrees.
there
were
multiple
time
33–52,
11–19,
4–7
entire
domain,
dry
wet
trends
occurred.
present
research
can
provide
reference
for
efficient
utilization
resources,
monitoring
early
warning,
prevention,
relief
Frontiers in Plant Science,
Год журнала:
2024,
Номер
15
Опубликована: Апрель 16, 2024
Amidst
the
backdrop
of
global
climate
change,
it
is
imperative
to
comprehend
intricate
connections
among
surface
water,
vegetation,
and
climatic
shifts
within
watersheds,
especially
in
fragile,
arid
ecosystems.
However,
these
relationships
across
various
timescales
remain
unclear.
We
employed
Ensemble
Empirical
Mode
Decomposition
(EEMD)
method
analyze
multifaceted
dynamics
water
vegetation
Bosten
Lake
Watershed
multiple
temporal
scales.
This
analysis
has
shed
light
on
how
elements
interact
with
revealing
significant
insights.
From
March
October,
approximately
14.9–16.8%
areas
permanent
were
susceptible
receding
drying
up.
Both
annual
monthly
values
Lake’s
level
area
exhibited
a
trend
initial
decline
followed
by
an
increase,
reaching
their
lowest
point
2013
(1,045.0
m
906.6
km2,
respectively).
Approximately
7.7%
vegetated
showed
increase
Normalized
Difference
Vegetation
Index
(NDVI).
NDVI
volatility
was
observed
23.4%
areas,
primarily
concentrated
southern
part
study
near
Bosten.
Regarding
components
(6
<
T
24
months),
temperature,
3-month
cumulative
NDVI,
3-month-leading
precipitation
strongest
correlation
changes
area.
For
interannual
(T≥
precipitation,
temperature
displayed
most
robust
alterations
In
both
components,
had
negative
impact
area,
while
exerted
positive
effects.
Through
comparative
analysis,
this
reveals
importance
periodicity
developing
adaptive
strategies
for
achieving
Sustainable
Development
Goals
dryland
watersheds.
introduces
methodology
dissecting
trends
scale
lake
links
variations
different
The
inherent
correlations
uncovered
research
can
serve
as
valuable
guidance
future
investigations
into
regions.
