Frontiers in Plant Science,
Год журнала:
2024,
Номер
15
Опубликована: Дек. 2, 2024
Global
warming
has
significantly
altered
plant
phenology
by
advancing
the
timing
of
leaf
emergence,
impacting
vegetation
productivity
and
adaptability.
Winter
spring
temperatures
have
commonly
been
used
to
explain
shifts,
but
we
still
lack
a
solid
understanding
effects
interactions
between
conditions
in
different
seasons.
This
study
utilizes
normalized
difference
index
(NDVI)
meteorological
data
examine
changes
winter
precipitation
on
start
growing
season
(SOS)
at
high
latitudes
China
from
1982
2015.
We
found
that
SOS
Northeast
China,
as
whole,
showed
weak
trend
(moving
earlier
year),
with
obvious
regional
differences.
Even
within
same
type,
were
faster
cold
north
(1.9
days/decade)
dry
northwest
(1.6
than
averages
for
deciduous
needleleaf
forests
(DNF;
1.2
grasslands
(0.6
days/decade).
Increases
dominate
forest
advancement,
while
grassland
is
mainly
influenced
precipitation.
Decreases
minimum
temperature
(T
Water Resources Research,
Год журнала:
2025,
Номер
61(1)
Опубликована: Янв. 1, 2025
Abstract
As
the
largest
city
in
northern
China
and
capital
of
China,
rapid
increases
Beijing’s
water
consumption
recent
years
have
made
resources
provision
an
increasing
problem.
To
rationally
allocate
resources,
it
is
important
to
obtain
long‐term
runoff
information
Beijing.
In
this
study
we
develop
a
236‐year
chronology
tree‐ring
widths
based
on
cores
from
Pinus
tabuliformis
four
sampling
sites.
The
resulting
regression
model
reconstructs
December–July
Yongding
River
Beijing,
with
49.5%
variance
explained,
back
1786
CE.
Among
last
236
years,
1868,
1956,
1991,
1998,
2018,
2021
were
extremely
high
years;
1900,
1906,
1999,
2000
low
years.
Comparison
reconstruction
results
climate
grid
data
demonstrated
large
magnitude
change
North
during
period.
Linkage
analysis
between
reconstructed
large‐scale
vapor
indicated
that
occurred
negative
phases
Pacific
Decadal
Oscillation,
which
may
be
influenced
by
East
Asian
Summer
Monsoon.
Projections
indicate
flow
will
increase
future.
Supported
policies
such
as
Ecological
Water
Supply
South‐to‐North
Diversion,
regional
vegetation
productivity
increased
substantially
since
2000.
Vegetation
growth
interacts
volume.
It
unclear
how
long
these
continue.
Abstract
Central
Asia
(CA),
a
typical
arid
and
semiarid
region,
has
experienced
worsening
droughts,
adversely
impacting
agricultural
production
socioeconomic
development.
However,
the
evolution
of
hydrological
droughts
in
CA
remains
unclear.
Here,
we
used
instrumental
streamflow
reanalysis
to
demonstrate
decline
surface
runoff
since
1990s,
with
44.6%
33.2%
area
dominated
by
reductions
snowmelt
precipitation,
respectively.
We
found
that
global
warming
contributes
long‐term
decrease
runoff,
while
short‐term
fluctuations
are
caused
El
Niño‐Southern
Oscillation,
such
as
southern
drying
induced
decreasing
precipitation
during
La
Niña.
project
future
drought
characteristics
based
on
state‐of‐the‐art
simulations
increasing
duration
severity
CA,
especially
Amu
Darya
basin,
Caspian
Sea
East
Coast
basin.
These
exacerbated
higher
anthropogenic
emissions,
posing
high‐level
risks
39.01%
land
35.9%
human
population
under
an
extremely
high
emissions
scenario.
findings
highlight
need
for
improved
water
conservation
technologies
concerted
development
strategies
should
be
considered
national
policy
makers
this
water‐scarce
climatically
sensitive
region.
npj Climate and Atmospheric Science,
Год журнала:
2024,
Номер
7(1)
Опубликована: Июнь 29, 2024
Abstract
Over
the
past
two
decades,
more
frequent
and
intense
climate
events
have
seriously
threatened
operation
of
water
transfer
projects
in
Pacific
Rim
region.
However,
role
climatic
change
driving
runoff
variations
source
areas
these
is
unclear.
We
used
tree-ring
data
to
reconstruct
changes
Hanjiang
River
since
1580
CE
representing
an
important
area
for
China’s
south-north
project.
Comparisons
with
hydroclimatic
reconstructions
southwestern
United
States
central
Chile
indicated
that
region
has
experienced
multiple
coinciding
droughts
related
ENSO
activity.
Climate
simulations
indicate
increased
likelihood
drought
occurrence
coming
decades.
The
combination
warming-induced
stresses
dynamic
El
Niño
(warming
ENSO)
patterns
a
thread
urban
agglomerations
agricultural
regions
rely
on
along
Rim.
Communications Earth & Environment,
Год журнала:
2024,
Номер
5(1)
Опубликована: Авг. 17, 2024
Historians
and
paleoclimatologists
have
long
studied
the
connection
between
ecoclimatic
changes
empire
growth,
transformation,
decline,
but
striking
cases
remain
rare.
Here,
we
introduce
a
tree-ring
chronology
from
southern
China
to
reconstruct
in
April-to-November
water
balance
of
middle
reaches
Yangtze
River
over
last
464
years.
The
reconstruction
supports
quantitative
assessment
spatiotemporal
structure
late
Ming
megadrought
potential
effects
on
subsequent
dynastic
transitions.
Our
results
indicate
that
1625
–
1644
CE
occurred
both
northern
parts
East
Asian
monsoon
region
China.
However,
variations
onset,
duration,
magnitude
this
event
differ
regions.
combination
factors
such
as
Pacific
sea
surface
temperature
anomalies,
weakened
solar
activity,
large-scale
volcanic
eruptions
may
contributed
occurrence
megadrought.
These
are
also
identified
key
drivers
interannual
decadal
fluctuations
drought
River.
provides
an
historical
context
for
development
adaptive
measures
mitigate
future
impacts
region.
across
north-to-south
China,
lasting
1625-1644
CE,
was
influenced
by
eruptions,
according
River's
using
chronology.
Journal of Hydrology Regional Studies,
Год журнала:
2024,
Номер
53, С. 101824 - 101824
Опубликована: Май 22, 2024
Study
Region:
The
Jialing
River,
distinguished
as
the
largest
tributary
of
Yangtze
River
by
watershed
area
Focus:
In
context
a
major
drought
in
Basin
2022,
this
study
examines
extent
low
discharge
its
tributary,
that
year
from
long-term
perspective
tree-ring,
then
explores
possible
relationships
between
changes
and
large-scale
ocean-atmosphere
circulation,
finally
identifies
future
trends
risk
extreme
high
or
based
on
CMIP6
multi-model
mean
data.
New
Hydrological
Insights
for
Over
past
301
years,
value
2022
exceeded
range
normal
runoff
fluctuations.
Simultaneously,
average
values
recent
2019–2022,
reached
historical
lows.
These
variations
are
primarily
influenced
Tropical
Pacific
Index
North
Atlantic
Oscillation.
Climate
model
projections
indicate
upper
reaches
regularly
experiencing
(similar
to
2022)
is
trending
downward,
with
probability
∼15%
per
2100,
while
upward,
∼28%
2100.
