Weather and Climate Extremes,
Journal Year:
2024,
Volume and Issue:
44, P. 100667 - 100667
Published: March 28, 2024
Flash
droughts
threaten
ecosystems
substantially
because
of
the
fast
onset
and
low
predictability.
Soil
atmospheric
water
stress
are
two
main
factors
reducing
ecosystem
productivity
during
flash
droughts.
However,
long-term
trends
in
soil
on
vegetation
unclear.
By
conducting
land
surface
model
simulations,
this
study
investigated
impact
gross
primary
(GPP)
hot
periods
droughts,
as
well
changes
from
1961
to
2022
over
China.
The
areas
dominated
by
were
65.2%
19.9%
respectively.
During
raised
39.4%,
reduced
48.7%.
1961–2022,
frequency,
intensity,
duration
all
showed
significant
upward
(p
<
0.05)
Meanwhile,
GPP
decreased
significantly
0.05),
but
increased
0.05).
Correspondingly,
at
0.8%/decade,
while
rose
1.6%/decade
With
sensitivity
we
found
that
was
weakened
North
China
plain
under
irrigated
conditions,
trend
consistent
with
non-irrigated
conditions
Our
indicated
importance
moisture
climate
warming.
Environmental Research Letters,
Journal Year:
2024,
Volume and Issue:
19(5), P. 054043 - 054043
Published: April 22, 2024
Abstract
Ongoing
shifts
in
climate,
especially
extreme
drought,
is
posing
considerable
threats
to
the
forest
carbon
uptake
worldwide.
In
China,
summer
2022
was
warmest
and
driest
since
beginning
of
meteorological
measurements.
This
study
synthesized
tower-based
fluxes
climate
data
from
two
subtropical
evergreen
deciduous
ecosystems
investigate
effects
such
drought.
Interestingly,
net
ecosystem
production
(NEP
=
−NEE)
only
exhibited
a
slight
decrease
at
while
it
even
enhanced
during
Further
analysis
revealed
that
although
reductions
gross
primary
productivity
(GPP)
respiration
(
R
e
)
were
found
both
sites,
larger
than
GPP
led
stronger
NEP
compared
previous
year.
However,
sharply
reduced
following
2023,
which
can
be
ascribed
legacy
The
results
multiple
linear
regression
soil
water
content
(SWC)
recognized
as
driver
,
downwelling
shortwave
radiation
g
regulated
variability
2022.
Across
these
including
GPP,
NEP,
resistance,
whereas
showed
resilience.
All
analyses
emphasized
diverse
adaptive
strategies
among
vegetation
types,
acted
an
important
role
assessing
sequestration
face
future
change.
Remote Sensing,
Journal Year:
2024,
Volume and Issue:
16(16), P. 2889 - 2889
Published: Aug. 7, 2024
In
2022,
a
severe
drought
and
heatwave
occurred
in
the
middle
lower
reaches
of
Yangtze
River
Basin.
Previous
studies
have
highlighted
severity
this
event,
yet
relevance
soil
moisture
(SM),
as
well
vapor
pressure
deficit
(VPD)
vegetation
damage,
remained
unclear.
Here,
we
utilized
solar-induced
chlorophyll
fluorescence
(SIF)
various
flux
data
to
monitor
impact
on
analyze
influence
different
environmental
factors.
The
results
indicated
situation
Basin
2022
that
significantly
affected
growth
ecosystem
carbon
balance.
SIF
NDVI
respective
advantages
reflecting
damage
under
conditions;
is
more
capable
capturing
weakening
photosynthesis,
while
can
rapidly
indicate
damage.
Additionally,
correlation
SM
are
comparable
VPD
SIF.
By
contrast,
differentiation
among
types
evident;
cropland
vulnerable
compared
forest
ecosystems
severely
by
heatwave.
These
findings
provided
important
insights
for
assessing
compound
events
growth.
