Atmosphere,
Journal Year:
2024,
Volume and Issue:
15(9), P. 1081 - 1081
Published: Sept. 6, 2024
Surface
albedo
plays
a
pivotal
role
in
the
Earth’s
energy
balance
and
climate.
This
study
conducted
an
analysis
of
spatial
distribution
patterns
temporal
evolution
albedo,
normalized
difference
vegetation
index
(NDVI),
snow
cover
(NSC),
land
surface
temperature
(LST)
within
Qilian
Mountains
(QLMs)
from
2001
to
2022.
evaluated
spatiotemporal
correlations
with
NSC,
NDVI,
LST
at
various
scales.
Additionally,
quantified
driving
forces
relative
contributions
topographic
natural
factors
variation
QLMs
using
geographic
detectors.
The
findings
revealed
following
insights:
(1)
Approximately
22.8%
exhibited
significant
changes
albedo.
annual
average
NSC
minor
decline
rates
−0.00037
−0.05083
(Sen’s
slope),
respectively.
Conversely,
displayed
marginal
increase
rate
0.00564,
while
NDVI
experienced
notable
0.00178.
(2)
seasonal
fluctuations
LST,
collectively
influenced
overall
Mountains.
Notably,
highly
similar
trends
between
whether
intra-annual
monthly
variations,
multi-year
anomalies,
or
regional
mean
trends,
indicate
that
reflected
by
played
major
role.
area
proportion
corresponding
elevation
PSI
(permanent
ice
regions)
slightly
increased,
potentially
suggesting
slow
upward
shift
high
mountain
snowline
QLMs.
(3)
type
(LCT),
Digital
Elevation
Model
(DEM,
which
means
elevation)
key
roles
shaping
pattern
was
most
significantly
interaction
slope
NDVI.
Water,
Journal Year:
2024,
Volume and Issue:
16(3), P. 420 - 420
Published: Jan. 27, 2024
Optimizing
the
land
use
structure
is
one
of
most
effective
means
improving
surface
water
aquatic
environment.
The
relationship
between
patterns
and
quality
complex
due
to
influence
dams
sluices.
To
further
investigate
impact
on
in
different
basins,
we
Shaying
River
as
an
example,
which
a
typical
tributary
Huai
Basin.
Utilizing
2020
data
monitoring
from
two
periods,
this
study
employs
GIS
spatial
analysis,
Random
Forest
Model,
redundancy
Partial
Least-Squares
Regression
quantitatively
explore
how
different-scale
buffer
zone
quality.
key
findings
include:
(1)
notable
seasonal
differences
indicators
within
basin.
Water
Quality
Index
(WQI)
significantly
better
non-flood
season
compared
flood
season,
with
deteriorating
towards
lower
reaches.
Key
affecting
include
dissolved
oxygen
(DO),
ammonia
nitrogen
(NH3-N),
total
phosphorus
(TP),
turbidity
(Tur)
NH3-N,
permanganate
index
(CODMn),
electrical
conductivity
(EC)
season.
(2)
Cultivated
construction
are
main
uses
sub-basin
was
identified
scale
for
River.
(3)
(PLSR)
analysis
revealed
that
cultivated
land,
grass
primary
types
influencing
changes,
PLSR
model
during
lands
show
positive
correlation
indicators,
while
forest
bodies,
grasslands
correlate
positively
DO
negatively
other
indicators.
underscores
rational
planning
crucial
enhancing
The
Qilian
Mountains
function
as
a
vital
ecological
barrier
in
western
China,
and
examining
environmental
contaminants
within
this
region
is
pivotal
for
safeguarding
its
integrity.
However,
there
notable
lack
of
knowledge
regarding
mercury
(Hg)
concentrations
river
waters
the
associated
risks
region.
To
evaluate
magnitude
Hg
pollution,
we
collected
84
water
samples
from
six
basins
Mountain
comprehensive
analysis.
average
total
(THg)
methylmercury
(TMeHg)
were
25.74
±
68.84
ng/L
0.25
0.43
ng/L,
respectively.
Our
findings
reveal
that
THg
TMeHg
primarily
exist
particulate
form
significantly
influenced
by
suspended
(TSP)
matter,
contributing
86%
47%
variance.
When
considering
interactions,
explanatory
power
anthropogenic
activities
combination
with
TSP
MeHg
soars
to
72%.
Ecological
risk
assessments
indicate
Heihe
River
basin
poses
highest
risk,
nearly
half
sites
exhibiting
chronic
medium
risk.
Given
escalating
urban
exposure
may
further
intensify
future.
