Journal of Geophysical Research Biogeosciences,
Journal Year:
2023,
Volume and Issue:
128(2)
Published: Feb. 1, 2023
Abstract
Net
ecosystem
production
(NEP)
by
submerged
aquatic
vegetation
plays
a
substantial
role
in
capturing
atmospheric
carbon
dioxide
into
ecosystems.
In
lakes
and
estuaries,
the
net
uptake
of
is
mediated
stratification
water
column
which
suppresses
vertical
flux
between
upper
lower
layers.
The
presence
can
also
affect
strength
such
that
interactions
vegetation,
stratification,
NEP
moderate
emissions.
Since
occur
there
need
for
new
numerical
approach
able
to
consider
effect
on
NEP,
dioxide.
This
study
aims
develop
model
investigate
how
density
flexibility,
affects
partial
pressure
(
p
CO
2
)
dissolved
inorganic
(DIC).
After
initial
parameterization
coefficients
based
experimental
work,
horizontal
variations
DIC
were
successfully
modeled
spatially
(horizontally)
integrated
(SiDIC)
model,
was
validated
with
field
observations
from
an
estuarine
freshwater
lake
case
study.
SiDIC
reproduce
changes
daytime
nighttime
throughout
column.
Sensitivity
tests
showed
fluctuation
controlled
suppression
due
vegetation.
results
highlight
importance
resolving
vegetation‐induced
when
modeling
budget
within
coastal
environments.
Physics of Fluids,
Journal Year:
2025,
Volume and Issue:
37(3)
Published: March 1, 2025
In
1974,
Csanady
and
Scott
developed
theoretical
solutions
for
the
flow
fields
displacements
of
a
density
interface
in
rectangular
basin
with
two-layer
stratification
when
constant
wind
stress
was
suddenly
imposed.
However,
their
do
not
satisfy
all
boundary
conditions.
present
study,
we
have
corrected
these
analyzed
validity
by
comparing
them
numerical
simulations.
We
found
that
high
upwelling
does
occur
nonlinear
effects,
vertical
circulation,
layer
effects
are
small.
addition,
Wedderburn
number
WN
is
more
significant
applicability
than
Burger
Si.
Furthermore,
highly
applicable
to
actual
phenomena
WN≥
1.98.
The Science of The Total Environment,
Journal Year:
2021,
Volume and Issue:
803, P. 150044 - 150044
Published: Sept. 3, 2021
A
typhoon
is
extreme
weather
that
flushes
terrestrial
carbon
(C)
loads
and
temporally
mixes
the
entire
water
columns
of
lakes
in
subtropical
regions.
C
flux
varies
based
on
trophic
level
associated
with
ecological
cycle
related
to
hydraulic
retention
time
(residence
time).
Herein,
we
sought
clarify
how
disturbance
from
a
affect
regimes
two
mountain
humid
region
Taiwan
different
levels—oligotrophic
mesotrophic.
We
investigated
meteorological
data
vertical
profiles
temperature,
dissolved
inorganic
(DIC),
organic
(DOC),
chlorophyll
(Chl.
a)
during
pre-typhoon
period
(April–July),
(August–November),
post-typhoon
(December–March)
for
five
years
(2009–2010
2015–2017).
applied
three-dimensional
environmental
model
(Fantom)
investigate
effect
net
ecosystem
production
(NEP)
using
residence
stratified
lakes.
The
results
demonstrate
typhoon-induced
mixing
plays
one
critical
roles
controlling
NEP
shallow
Physics of Fluids,
Journal Year:
2021,
Volume and Issue:
33(4)
Published: April 1, 2021
The
propagation
of
elevation
internal
solitary
waves
(ISWs)
over
a
large
triangular
ridge
was
investigated
experimentally
in
stratified
fluid
flume.
characteristics
the
ISWs
were
measured
by
using
real-time
wave
measuring
instrument
and
particle
image
velocimetry,
respectively.
At
front
slope
ridge,
obvious
accumulation
appeared,
waveform
distorted
broadened,
ISW
amplitude
increased
slightly,
phase
velocity
decreased
suddenly,
lower
layer
flow
significantly.
In
region
top,
counterclockwise
vortex
bright
spots
which
signified
occurrence
breaking,
shape
incident
transferred
to
table-top
wave.
back
fission
became
symmetric
gradually
restored
normal,
significantly,
slightly.
energy
consistently
during
whole
loss
about
30%–35%
Due
breaking
fission,
occurred
near
top
largest
almost
same
at
symmetrical
positions
on
slopes.
Journal of Geophysical Research Oceans,
Journal Year:
2023,
Volume and Issue:
128(6)
Published: May 27, 2023
Abstract
Recent
efforts
using
microstructure
turbulence
measurements
have
contributed
to
our
understanding
of
the
overall
energy
budget
in
lakes
and
linkages
vertical
fluxes.
A
paucity
lake‐wide
hinders
ability
assess
how
representative
such
budgets
are
at
basin
scale.
Using
an
autonomous
underwater
glider
equipped
with
a
payload,
we
explored
spatial
variability
pelagic
near‐shore
regions
Lake
Geneva.
Dissipation
rates
kinetic
thermal
variance
were
estimated
by
fitting
temperature
gradient
fluctuations
spectra
Batchelor
spectrum.
In
deep
waters,
turbulent
dissipation
surface
thermocline
mild
(∼10
−8
W
kg
−1
)
weakened
toward
hypolimnion
−11
10
−10
).
The
seasonal
exhibited
inhibited
interior
mixing,
extremely
low
values
mixing
efficiency
(
Ri
f
≪
0.1).
contrast,
slope
zone,
band
significantly
enhanced
(∼5
×
extended
well
above
bottom
boundary
layer
was
associated
strong,
efficient
>
0.17).
resulting
contribution
region
basin‐scale
large,
90%
basin‐wide
mixing—and
only
30%
dissipation—occurring
within
4
km
shoreline.
This
will
modify
overturning
circulation
transport
pathways
dissolved
compounds
exchanged
sediments.
dynamics
responsible
for
shift
regime,
which
appears
crucial
lakes,
could
not
be
fully
unraveled
collected
observations.
Additional
model
data
analyses
hint
role
submesoscale
instabilities.
Journal of Geophysical Research Biogeosciences,
Journal Year:
2021,
Volume and Issue:
126(4)
Published: March 18, 2021
Abstract
Thermal
stratification
is
a
critical
physical
process
controlling
carbon
(C)
flux
from
lakes
into
the
atmosphere.
In
general,
vertical
water
temperature
profiles
in
shallow
subtropical
can
vary
significantly
because
typhoons
frequently
induce
mixing
across
entire
lake
due
to
strong
winds
and
rapid
flushing
river
inputs.
Since
C
fluxes
are
driven
by
dissolved
inorganic
(DIC),
it
necessary
understand
stratification's
influence
on
DIC
dynamics
lakes.
Therefore,
we
aimed
clarify
impact
of
Yuan‐Yang
Lake,
typical
mountain
lake,
developing
net
ecosystem
production
(NEP)
model.
We
measured
profile
once
or
twice
month
July
2004
December
2017.
applied
three‐dimensional
hydrological
model
estimate
residence
time
NEP,
which
revealed
that
large
amounts
stored
lower
layer
spring
summer
suppression
stratification.
autumn
winter,
was
well
mixed,
evenly
distributed
column
mixing.
This
confirmed
profiles.
Water Resources Research,
Journal Year:
2022,
Volume and Issue:
58(3)
Published: March 1, 2022
Abstract
Upwelling
can
impact
water
quality
dynamics
in
stratified
bodies.
Conceptual
models
generally
classify
the
upwelling
response
to
winds
lakes
into
either
a
non‐rotational
(2D,
closed‐basin)
model
or
rotational
(coastal
upwelling)
counterpart.
The
is
broadly
applied
rotationally
influenced
lakes.
may
exhibit
elements
of
both
conceptual
models.
Here,
we
present
results
simulations
with
an
accurate
three‐dimensional
numerical
lake
moderate
size
(Lake
Tahoe,
California–Nevada,
USA),
and
focus
our
analyses
on
addressing
influence
Coriolis
force
during
setup
relaxation
phases.
was
observed
at
upwind
boundary
as
well
along
coast
left
mean
wind
direction
due
Ekman‐driven
divergence.
On
downwind
shoreline,
where
downwelling
occurs,
alongshore
currents
appeared
forcing.
Following
wind,
reveal,
for
first
time,
existence
powerful
cyclonic
size,
which
are
found
be
quasi‐geostrophic
balance.
These
followed
characteristics
coastal
jets
often
large
ocean.
Our
work
leads
us
conclude
that
length
scales
≈20
km
Burger
numbers
S
<
1,
exhibits
combination
predicted
by
non‐rotational,
2D,
closed
basin
model,
coastal‐upwelling
model.
