Exploring the formation mechanism of cold mineral springs in the potassic basaltic region of Wudalianchi, Northeast China
Chemical Geology,
Год журнала:
2025,
Номер
unknown, С. 122862 - 122862
Опубликована: Май 1, 2025
Язык: Английский
Climate-induced permafrost degradation exerts species-specific impacts on pine and larch growth in the Da Xing’anling Mountains, Northeast China
Agricultural and Forest Meteorology,
Год журнала:
2025,
Номер
372, С. 110665 - 110665
Опубликована: Июнь 2, 2025
Язык: Английский
Satellite Gravimetry in Studies of Permafrost Thawing and Vegetation Productivity in the Cryolithozone
Contemporary Problems of Ecology,
Год журнала:
2024,
Номер
17(6), С. 869 - 880
Опубликована: Дек. 1, 2024
Abstract
Changes
in
the
hydrothermal
regime
of
soils
caused
by
melting
permafrost
layer
are
most
important
ecological
factor
dynamics
vegetation
cryolithozone.
The
impact
soil
thawing
on
growth
index
(GI)
larch
(
Larix
spp.)
and
gross
net
primary
productivity
(GPP
NPP)
Arctic
region
Central
Siberia
(sparse
forests,
tundra,
forest
tundra)
is
investigated.
following
hypotheses
tested:
(1)
gravimetric
data
allow
us
to
assess
water
mass
soils;
(2)
frozen
stimulates
woody
plants
vegetation.
This
work
uses
methods
dendrochronology,
field
data,
satellite
gravimetry
(GRACE
survey),
remote
sensing
GPP
(Terra/MODIS
survey).
An
analysis
has
revealed
a
significant
long-term
trend
decreasing
cryolithozone
R
2
=
0.68).
amount
released
during
estimated
at
6.4
±
2.3
kg/m
–2
per
year.
A
close
relationship
was
established
between
GI
with
moisture
anomalies
r
–0.7
–0.9,
respectively).
increasing
temperature
root
zone
deficit
vapor
also
have
positive
effect
value
as
whole
0.6
0.6–0.9,
It
that
pyrogenic
carbon
losses
significantly
(two
orders
magnitude)
lower
than
NPP
value.
Under
conditions
waterlogged
soils,
which
typical
for
Arctic,
climate
warming
accompanied
an
improvement
plant
cover
contributes
increase
preservation
status
sink
area.
Язык: Английский
Permafrost Degradation and Vegetation Growth Beyond the Polar Circle in Siberia
Forests,
Год журнала:
2024,
Номер
16(1), С. 47 - 47
Опубликована: Дек. 30, 2024
Permafrost
thawing
is
potentially
a
crucial
but
poorly
investigated
factor
that
influences
vegetation
dynamics
in
the
Arctic.
We
studied
permafrost
thaw
rate
beyond
Polar
Circle
Siberia.
analyzed
its
influence
on
larch
(Larix
spp.)
growth
and
Arctic
(sparse
forests,
tundra,
forest–tundra
communities)
productivity
(NPP).
checked
following
hypotheses:
(1)
satellite
gravimetry
valid
for
analysis;
(2)
meltwater
runoff
stimulated
trees’
NPP.
used
(GRACE,
Terra/MODIS)
field
data,
tree
radial
index
measurements.
found
continuous
negative
trend
terrestrial
water
content
(r2
=
0.67)
caused
by
Circle.
Runoff
maximal
West
Mid
Siberia
(9.7
±
2.9
kg/m2/y)
decreases
eastward
direction
with
minimal
values
Chukotka
Peninsula
sector
(−2.9
3.2
kg/m2/y).
increment
of
trees
positively
correlated
(0.5…0.6),
whereas
correlation
soil
was
(−0.55…−0.85).
leads
to
an
increase
productivity.
positive
NPP
throughout
Siberian
0.30).
negatively
(r
−0.55)
(West
Siberia,
r
0.7).
An
VPD
(vapor
pressure
deficit)
air
temperatures
0.5…0.9
0.6…0.9,
respectively).
Generally,
degradation
improved
hydrothermal
conditions
contributes
preservation
as
carbon
sink
despite
burning
rate.
Язык: Английский