Hydrology and earth system sciences,
Journal Year:
2025,
Volume and Issue:
29(3), P. 613 - 625
Published: Feb. 4, 2025
Abstract.
Recovery
time,
referring
to
the
duration
that
an
ecosystem
needs
return
its
pre-drought
condition,
is
a
fundamental
indicator
of
ecological
resilience.
Recently,
flash
droughts
–
characterised
by
rapid
onset
and
development
have
gained
increasing
attention.
Nevertheless,
spatiotemporal
patterns
in
gross
primary
productivity
(GPP)
recovery
time
factors
influencing
it
remain
largely
unknown.
In
this
study,
we
investigate
terrestrial
China
based
on
GPP
using
random
forest
regression
model
SHapley
Additive
exPlanations
(SHAP)
method.
A
was
developed
analyse
establish
response
functions
through
partial
correlation
for
typical
drought
periods.
The
dominant
driving
were
determined
SHAP
results
reveal
average
across
approximately
37.5
d,
with
central
southern
regions
experiencing
longest
durations.
Post-flash-drought
radiation
emerges
as
environmental
factor,
followed
aridity
index
post-flash-drought
temperature,
particularly
semi-arid
sub-humid
areas.
Temperature
exhibits
non-monotonic
relationship
where
both
excessively
cold
hot
conditions
lead
longer
Herbaceous
vegetation
recovers
more
rapidly
than
woody
forests,
deciduous
broadleaf
forests
demonstrating
shortest
time.
This
study
provides
valuable
insights
comprehensive
water
resource
management
contributes
large-scale
monitoring
efforts.
