Abstract
Changes
in
heat
and
moisture
significantly
co-alter
ecosystem
functioning.
However,
knowledge
on
dynamics
of
responses
to
climate
change
is
limited.
Here,
we
quantify
long-term
sensitivity
based
weighted
ratios
vegetation
productivity
variability
multiple
variables
from
satellite
observations,
greater
values
which
indicate
more
yields
per
hydrothermal
condition
change.
Our
results
show
exhibits
large
spatial
increases
with
the
aridity
index.
A
positive
temporal
trend
found
61.28%
study
area
2001
2021,
largely
attributed
declining
vapor
pressure
deficit
constrained
by
solar
radiation.
Moreover,
carbon
dioxide
plays
a
dual
role;
moderation
promotes
fertilization
effects,
whereas
excess
may
suppress
growth
triggering
droughts.
findings
highlight
stress
between
land
atmosphere
one
key
prerequisites
for
stability,
offsetting
part
negative
effects
heat.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: March 1, 2023
When
soil
moisture
(SM)
content
falls
within
a
transitional
regime
between
dry
and
wet
conditions,
it
controls
evaporation,
affecting
atmospheric
heat
humidity.
Accordingly,
different
SM
regimes
correspond
to
gears
of
land-atmosphere
coupling,
climate.
Determining
patterns
their
future
evolution
is
imperative.
Here,
we
examine
global
distributions
from
ten
climate
models.
Under
increasing
CO2,
the
range
extends
into
unprecedented
coupling
in
many
locations.
Solely
areas
decline
globally
by
15.9%,
while
emerge
currently
humid
tropics
high
latitudes.
Many
semiarid
regions
spend
more
days
fewer
regime.
These
imply
that
larger
fraction
world
will
evolve
experience
multiple
with
strongly
coupled
expanding
most.
This
could
amplify
sensitivity
feedbacks
land
management.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: June 6, 2024
Abstract
During
extensive
periods
without
rain,
known
as
dry-downs,
decreasing
soil
moisture
(SM)
induces
plant
water
stress
at
the
point
when
it
limits
evapotranspiration,
defining
a
critical
SM
threshold
(θ
crit
).
Better
quantification
of
θ
is
needed
for
improving
future
projections
climate
and
resources,
food
production,
ecosystem
vulnerability.
Here,
we
combine
systematic
satellite
observations
diurnal
amplitude
land
surface
temperature
(dLST)
during
corroborated
by
in-situ
data
from
flux
towers,
to
generate
observation-based
global
map
.
We
find
an
average
0.19
m
3
/m
,
varying
0.12
in
arid
ecosystems
0.26
humid
ecosystems.
simulated
Earth
System
Models
overestimated
dry
areas
underestimated
wet
areas.
The
observed
pattern
reflects
adaptation
available
atmospheric
demand.
Using
explainable
machine
learning,
show
that
aridity
index,
leaf
area
texture
are
most
influential
drivers.
Moreover,
annual
fraction
days
with
stress,
stays
below
has
increased
past
four
decades.
Our
results
have
important
implications
understanding
inception
models
identifying
tipping
points.
Nature,
Journal Year:
2024,
Volume and Issue:
635(8039), P. 631 - 638
Published: Oct. 23, 2024
Low
soil
moisture
and
high
vapour
pressure
deficit
(VPD)
cause
plant
water
stress
lead
to
a
variety
of
drought
responses,
including
reduction
in
transpiration
photosynthesis
Science Advances,
Journal Year:
2024,
Volume and Issue:
10(4)
Published: Jan. 24, 2024
Across
western
North
America
(WNA),
20th-21st
century
anthropogenic
warming
has
increased
the
prevalence
and
severity
of
concurrent
drought
heat
events,
also
termed
hot
droughts.
However,
lack
independent
spatial
reconstructions
both
soil
moisture
temperature
limits
potential
to
identify
these
events
in
past
place
them
a
long-term
context.
We
develop
Western
American
Temperature
Atlas
(WNATA),
data-independent
0.5°
gridded
reconstruction
summer
maximum
temperatures
back
16th
century.
Our
evaluation
WNATA
with
existing
hydroclimate
reveals
an
increasing
association
between
recent
decades,
relative
five
centuries.
The
synthesis
paleo-reconstructions
indicates
that
amplification
modern
WNA
megadrought
by
frequency
extent
compound
dry
conditions
21st
are
likely
unprecedented
since
at
least
Abstract
Europe
has
experienced
severe
drought
events
in
recent
decades,
posing
challenges
to
understand
vegetation
responses
due
diverse
distribution,
varying
growth
stages,
different
characteristics,
and
concurrent
hydroclimatic
factors.
To
analyze
response
meteorological
drought,
we
employed
multiple
indicators
across
European
biomes.
Our
findings
reveal
that
sensitivity
increases
as
the
canopy
develops
throughout
year,
with
sensitivities
from
−0.01
spring
0.28
autumn
drought-susceptible
areas
18.5
57.8%
Europe.
Soil
water
shortage
exacerbates
vegetation-drought
temporally,
while
its
spatial
impact
is
limited.
Vegetation-drought
strongly
correlates
vapor
pressure
deficit
partially
atmospheric
CO
2
concentration.
These
results
highlight
spatiotemporal
variations
influence
of
The
enhance
our
understanding
factors,
providing
valuable
sub-seasonal
information
for
management
preparedness.
