Fractal and Fractional,
Journal Year:
2024,
Volume and Issue:
8(2), P. 102 - 102
Published: Feb. 7, 2024
Gaining
insights
into
the
space–time
variations
in
long-range
dependence
of
sea
surface
chlorophyll
is
crucial
for
early
detection
environmental
issues
oceans.
To
this
end,
12
locations
were
selected
along
Yangtze
River
and
Pearl
estuaries,
varying
distances
from
Chinese
coastline.
Daily
satellite-observed
concentration
data
at
these
collected
Copernicus
Marine
Service
website,
spanning
December
1997
to
November
2023.
The
main
objective
current
study
introduce
a
multi-fractional
generalized
Cauchy
model
calculating
values
Hurst
exponents
quantitatively
assessing
strength
different
spatial
time
instants
during
period.
Furthermore,
ANOVA
was
utilized
detect
differences
calculated
exponent
among
various
months
seasons.
From
perspective,
findings
reveal
significantly
stronger
offshore
regions
compared
nearshore
areas,
with
>
0.5
versus
<0.5.
It
noteworthy
that
each
location
exhibit
significant
seasons,
temporal
perspective.
Specifically,
summer
region
weaker
than
other
whereas
concludes
inversely
related
distance
coastline,
anthropogenic
activity
plays
dominant
role
shaping
coastal
China.
Journal of Geophysical Research Oceans,
Journal Year:
2023,
Volume and Issue:
128(4)
Published: April 1, 2023
Abstract
Evaluating
the
contribution
of
rivers
to
coastal
seas
in
Earth
system
and
accurately
predicting
marine
environmental
responses
climate
change
are
crucial
for
mitigating
addressing
future
natural
disasters,
especially
those
related
extreme
hydrological
events,
such
as
fluvial
floods.
The
Changjiang
(Yangtze)
River
Estuary
(CRE)
East
China
Sea
continuum,
known
high
stress,
complex
dynamic
processes,
frequent
flood
were
selected
determine
compound
impacts
a
severe
that
persisted
whole
July
2017.
We
conducted
three
cruise
surveys
before
after
this
event.
Our
revealed
phosphate
concentration
channel
CRE
declined
from
2
<1
μM
during
flood,
while
nitrate
remained
stable.
applied
coupled
physical‐biogeochemical
model
spatio‐temporal
influence
floodwater
(freshwater
upstream
events).
During
initial
rising
discharge
stage,
surface
phytoplankton
blooms
triggered
by
enhanced
stratification
consumed
significantly
increased
N:P
ratio
sea.
was
restored
diminished,
but
elevated
due
lower
northeastward
area
within
low‐salinity
river
plume.
Model
experiments
also
showed
biomass
plume
region
sensitive
riverine
inputs
Fractal and Fractional,
Journal Year:
2024,
Volume and Issue:
8(2), P. 102 - 102
Published: Feb. 7, 2024
Gaining
insights
into
the
space–time
variations
in
long-range
dependence
of
sea
surface
chlorophyll
is
crucial
for
early
detection
environmental
issues
oceans.
To
this
end,
12
locations
were
selected
along
Yangtze
River
and
Pearl
estuaries,
varying
distances
from
Chinese
coastline.
Daily
satellite-observed
concentration
data
at
these
collected
Copernicus
Marine
Service
website,
spanning
December
1997
to
November
2023.
The
main
objective
current
study
introduce
a
multi-fractional
generalized
Cauchy
model
calculating
values
Hurst
exponents
quantitatively
assessing
strength
different
spatial
time
instants
during
period.
Furthermore,
ANOVA
was
utilized
detect
differences
calculated
exponent
among
various
months
seasons.
From
perspective,
findings
reveal
significantly
stronger
offshore
regions
compared
nearshore
areas,
with
>
0.5
versus
<0.5.
It
noteworthy
that
each
location
exhibit
significant
seasons,
temporal
perspective.
Specifically,
summer
region
weaker
than
other
whereas
concludes
inversely
related
distance
coastline,
anthropogenic
activity
plays
dominant
role
shaping
coastal
China.
