Remote Sensing,
Journal Year:
2023,
Volume and Issue:
15(7), P. 1847 - 1847
Published: March 30, 2023
The
accurate
mapping
of
soil
organic
carbon
(SOC)
distribution
is
important
for
sequestration
and
land
management
strategies,
contributing
to
mitigating
climate
change
ensuring
agricultural
productivity.
Heihe
River
Basin
in
China
an
region
that
has
immense
potential
SOC
storage.
Phenological
variables
are
effective
indicators
vegetation
growth,
hence
closely
related
SOC.
However,
few
studies
have
incorporated
phenological
prediction,
especially
alpine
areas
such
as
the
Basin.
This
study
used
random
forest
(RF)
extreme
gradient
boosting
(XGBoost)
effects
(e.g.,
Greenup,
Dormancy,
etc.)
obtained
from
MODIS
(i.e.,
Moderate
Resolution
Imaging
Spectroradiometer)
product
(MCD12Q2)
on
content
prediction
middle
upper
reaches
current
also
identified
dominating
compared
model
performance
using
a
cross
validation
procedure.
results
indicate
that:
(1)
when
were
considered,
R2
(coefficient
determination)
RF
XGBoost
0.68
0.56,
respectively,
consistently
outperforms
various
experiments;
(2)
environmental
MAT,
MAP,
DEM
NDVI
play
most
roles
prediction;
(3)
can
account
32–39%
spatial
variability
both
models,
factor
among
five
categories
predictive
variables.
proved
introduction
significantly
improve
prediction.
They
should
be
indispensable
accurately
modeling
studies.
Remote Sensing,
Journal Year:
2023,
Volume and Issue:
15(4), P. 1066 - 1066
Published: Feb. 15, 2023
One
reason
for
soil
degradation
is
salinization
in
inland
dryland,
which
poses
a
substantial
threat
to
arable
land
productivity.
Remote-sensing
technology
provides
rapid
and
accurate
assessment
salinity
monitoring,
but
there
lack
of
high-resolution
remote-sensing
spatial
estimations.
The
PlanetScope
satellite
array
high-precision
mapping
surface
monitoring
through
its
3-m
resolution
near-daily
revisiting
frequency.
This
study’s
use
the
new
attempt
estimate
drylands.
We
hypothesized
that
field
observations,
data,
spectral
indices
derived
from
data
using
partial
least-squares
regression
(PLSR)
method
would
produce
reasonably
regional
maps
based
on
84
ground-truth
various
parameters,
like
band
reflectance,
published
indices.
results
showed
newly
constructed
red-edge
yellow
indices,
we
were
able
develop
several
inversion
models
maps.
Different
algorithms,
including
Boruta
feature
preference,
Random
Forest
algorithm
(RF),
Extreme
Gradient
Boosting
(XGBoost),
applied
variable
selection.
(YRNDSI
YRNDVI)
had
best
Pearson
correlations
0.78
−0.78.
also
found
proportions
bands
accounted
large
proportion
essential
strategies
three
with
preference
at
80%,
RF
XGBoost
60%,
indicating
these
two
contributed
more
estimation
results.
PLSR
model
different
XGBoost-PLSR
coefficient
determination
(R2),
root
mean
square
error
(RMSE),
ratio
performance
deviation
(RPD)
values
0.832,
12.050,
2.442,
respectively.
These
suggest
has
potential
significantly
advance
research
by
providing
wealth
fine-scale
information.
Remote Sensing,
Journal Year:
2023,
Volume and Issue:
15(22), P. 5294 - 5294
Published: Nov. 9, 2023
Rapid
and
accurate
measurement
of
the
soil
organic
carbon
(SOC)
content
is
a
pre-condition
for
sustainable
grain
production
land
development,
contributes
to
neutrality
in
agricultural
industry.
To
provide
technical
support
development
utilization
resources,
SOC
can
be
estimated
using
Vis-NIR
diffuse
reflectance
spectroscopy.
However,
spectral
redundancy
co-linearity
issues
spectra
pose
extreme
challenges
analysis
model
construction.
This
study
compared
effects
different
pre-processing
methods
feature
variable
algorithms
on
estimation
content.
this
end,
situ
hyperspectral
data
samples
were
collected
from
lakeside
oasis
Bosten
Lake
Xinjiang,
China.
The
results
showed
that
combination
continuous
wavelet
transform
(CWT)-random
frog
could
rapidly
estimate
with
excellent
accuracy
(R2
0.65–0.86).
selection
algorithm
effectively
improved
(average
improvement
(0.30–0.48);
based
their
ability
improve
average,
ranked
as
follows:
particle
swarm
optimization
(PSO)
>
ant
colony
(ACO)
random
Boruta
simulated
annealing
(SA)
successive
projections
(SPA).
CWT-XGBoost
best
results,
R2
=
0.86,
RMSE
2.44,
RPD
2.78.
bands
accounted
only
0.57%
bands,
most
important
sensitive
distributed
at
755–1195
nm,
1602
1673
2213
nm.
These
findings
are
significance
extraction
precise
information
oases
arid
areas,
which
would
aid
achieving
human–land
sustainability.
Remote Sensing,
Journal Year:
2024,
Volume and Issue:
16(17), P. 3268 - 3268
Published: Sept. 3, 2024
The
accurate
prediction
of
soil
organic
carbon
(SOC)
is
important
for
agriculture
and
land
management.
Methods
using
remote
sensing
data
are
helpful
estimating
SOC
in
bare
soils.
To
overcome
the
challenge
predicting
under
vegetation
cover,
this
study
extracted
spectral,
radar,
topographic
variables
from
multi-temporal
optical
satellite
images
(high-resolution
PlanetScope
medium-resolution
Sentinel-2),
synthetic
aperture
radar
(Sentinel-1),
digital
elevation
model,
respectively,
to
estimate
content
arable
soils
Wuling
Mountain
region
Southwest
China.
These
were
modeled
at
four
different
spatial
resolutions
(3
m,
20
30
80
m)
eXtreme
Gradient
Boosting
algorithm.
results
showed
that
modeling
resolution,
combination
multi-source
data,
temporal
phases
all
influenced
performance.
models
generally
yielded
better
a
medium
(20
resolution
than
fine
coarse
(80
resolutions.
PlanetScope,
Sentinel-2,
topography
factors
gave
satisfactory
predictions
dry
(R2
=
0.673,
MAE
0.107%,
RMSE
0.135%).
addition
Sentinel-1
indicators
best
paddy
field
0.699,
0.114%,
0.148%).
values
R2
optimal
improved
by
36.0%
33.4%,
compared
entire
area.
winter
played
dominant
role
both
land.
This
offers
valuable
insights
into
effectively
properties
cover
various
scales
data.
Sensors,
Journal Year:
2025,
Volume and Issue:
25(7), P. 2184 - 2184
Published: March 30, 2025
Despite
extensive
use
of
Sentinel-2
(S-2)
data
for
mapping
soil
organic
carbon
(SOC),
how
to
fully
mine
the
potential
time-series
S-2
still
remains
unclear.
To
fill
this
gap,
study
introduced
an
innovative
approach
mining
data.
Using
200
top
samples
as
example,
we
revealed
temporal
variation
patterns
in
correlation
between
SOC
and
subsequently
identified
optimal
monitoring
time
window
SOC.
The
integration
environmental
covariates
with
multiple
ensemble
models
enabled
precise
arid
region
southern
Xinjiang,
China
(6109
km2).
Our
results
indicated
following:
(a)
exhibited
both
interannual
monthly
variations,
while
July
August
is
SOC;
(b)
adding
properties
texture
information
could
greatly
improve
accuracy
prediction
models.
Soil
contribute
8.85%
61.78%
best
model,
respectively;
(c)
among
different
models,
stacking
model
outperformed
weight
averaging
sample
terms
performance.
Therefore,
our
proved
that
spectral
from
window,
integrated
has
a
high
accurate
mapping.