Environmental Research Letters,
Journal Year:
2024,
Volume and Issue:
19(8), P. 084013 - 084013
Published: July 4, 2024
Abstract
The
Northern
Hemisphere
mid-latitudes,
with
large
human
populations
and
terrestrial
carbon
sinks,
have
a
high
demand
for
dependence
on
water
resources.
Despite
the
growing
interest
in
vegetation
responses
to
drought
under
climate
change
this
region,
our
understanding
of
changes
relationship
between
growth
availability
(referred
as
Rvw)
remains
limited.
Here,
we
aim
explore
Rvw
its
drivers
mid-latitudes
1982
2015.
We
used
satellite-derived
normalized
difference
index
(NDVI)
fine-resolution
Palmer
severity
(PDSI)
proxies
availability,
respectively.
trend
analysis
results
showed
that
NDVI
PDSI
were
asynchronous
over
past
three
decades.
Moreover,
analyzed
spatiotemporal
patterns
correlation
coefficient
PDSI.
indicated
was
getting
closer
more
areas
period,
but
there
differences
across
ecosystems.
Specifically,
most
croplands
grasslands
primarily
constrained
by
deficit,
which
stronger;
however,
forests
surplus,
weaker.
Furthermore,
random
forest
regression
models
dominant
driver
NDVI-PDSI
atmospheric
dioxide
(CO
2
)
than
45%
grid
cells.
In
addition,
partial
demonstrated
elevated
CO
concentrations
not
only
boosted
through
fertilizer
effect
also
indirectly
enhanced
improving
use
efficiency.
Overall,
study
highlights
important
role
mediating
change,
implying
potential
link
greening
risk.
Remote Sensing,
Journal Year:
2023,
Volume and Issue:
16(1), P. 160 - 160
Published: Dec. 30, 2023
Understanding
the
effects
of
natural
and
human
disturbance
factors
on
fractional
vegetation
coverage
(FVC)
is
significant
in
promotion
ecological
environmental
protection.
However,
most
relevant
studies
neglect
to
consider
differences
effect
driving
areas
with
different
change
characteristics.
In
this
paper,
we
have
combined
Theil-Sen
median
trend
analysis
Mann-Kendall
testing
identify
degraded
restored
areas.
Differences
impact
various
FVC
terms
degradation,
restoration,
whole
region
were
distinguished
quantitatively
using
geodetector
model.
Additionally,
constraint
line
approach
was
used
detect
influence
thresholds
FVC.
The
results
are
shown
as
below:
(1)
showed
an
overall
improving
trend,
restoration
degradation
accounted
for
69.2%
22.0%,
respectively.
(2)
two
dominant
affecting
Digital
Elevation
Model
(DEM)
temperature
both
regions.
explanatory
power
precipitation
noticeably
between
(3)
Most
had
a
“convex”
FVC,
which
gradually
weakened
increase
variable
below
threshold
vice
versa.
Human
negatively
constrained
increased
activity.
This
study
can
help
decision-makers
optimize
specific
implementation
policies
relating
sustainable
development.
Forests,
Journal Year:
2023,
Volume and Issue:
14(11), P. 2142 - 2142
Published: Oct. 27, 2023
In
the
context
of
global
warming,
strength
and
frequency
drought
events
are
projected
to
grow
in
future,
onset
can
have
dramatic
effects
on
vegetation
growth
terrestrial
ecosystems.
Central
Asia
is
largest
non-territorial
area
world,
response
extremely
sensitive
area.
However,
few
studies
quantified
compared
gross
primary
productivity
(GPP)
lagged
cumulative
drought.
this
research,
solar-induced
chlorophyll
fluorescence
GPP
Standardized
Precipitation
Evaporation
Index
(SPEI)
were
used
analyze
time
space
patterns
SPEI
quantify
compare
various
types.
During
period
from
2000
2018,
general
trends
showed
a
slight
increase
Asia,
with
ratio
variation
being
1.35
g
C
m−2
y−1
spatially
decreasing
distribution
north
south.
trend
then
increasing
over
19
years,
(drying)
rate
change
−0.02
y−1,
overall
spatial
pattern
was
drying
out
13
months,
72.44%
regional
droughts
had
impacts
vegetation.
The
maximum
correlation
coefficients
effectiveness
concentrated
range
0.15–0.35,
high
distributed
southern
northwestern
Kazakhstan,
which
prairie
regions.
Of
regions
75.86%
at
9–12
months.
0.20–0.50,
primarily
situated
south
Kazakhstan
east
Uzbekistan.
Comparing
effect
shows
that
rather
than
cover
found
86.75%
Asia.
This
research
enhances
our
comprehension
influence
ecosystems
arid
has
certain
reference
value
for
helping
region
cope
climate
change.
Advances in Climate Change Research,
Journal Year:
2024,
Volume and Issue:
15(1), P. 9 - 20
Published: Feb. 1, 2024
Despite
experiencing
a
decadal
shift
towards
drought
conditions
at
the
end
of
20th
century,
semiarid
grasslands
in
northeast
Asia
(NEA)
exhibited
an
evident
greening
trend
from
1982
to
2020.
However,
mechanism
behind
this
phenomenon
remains
unclear.
Hence,
we
analysed
interdecadal
changes
vegetation
response
on
basis
standardised
precipitation
evapotranspiration
index
(SPEI)
and
Global
Inventory
Modelling
Mapping
Studies
LAI4g
datasets,
with
emphasis
differences
between
direct
legacy
effects
(as
measured
by
resilience),
explore
persistent
grassland
greening.
Results
revealed
that
during
post-drought
period
(2000‒2020),
sudden
decrease
water
content
intermediate
soil
layer
triggered
intensified
drought.
Specifically,
although
resilience
were
amplified,
they
asymmetric
changes.
Resilience
was
stronger
than
effects,
difference
increased
increasing
(drought
recovery)
levels.
These
combined
may
account
for
against
drying
NEA.
Given
projected
exacerbation
future
droughts,
study
holds
notable
importance
comprehending
long-term
change
dynamics
dryland
ecosystems.
