Journal of Geophysical Research Earth Surface,
Journal Year:
2024,
Volume and Issue:
129(11)
Published: Nov. 1, 2024
Abstract
Waves,
rivers,
and
tides
shape
delta
morphology.
Recent
studies
have
enabled
predictions
of
their
relative
influence
on
deltas
globally,
but
methods
associated
uncertainties
remain
poorly
known.
Here,
we
address
that
gap
show
how
to
quantify
morphology
within
the
Galloway
ternary
diagram
river,
wave,
tidal
sediment
fluxes.
We
assess
compared
observations
for
31
globally
find
a
median
error
4%
(standard
deviation
11%)
in
tide,
or
wave‐driven
Relative
are
greatest
mixed‐process
(e.g.,
Sinu,
49%)
tend
decrease
end‐member
morphologies
where
either
river
fluxes
dominate
Fly,
0.2%).
Prediction
morphologic
metrics
more
considerable:
shoreline
protrusion
angles
set
by
wave
45%,
channel
widening
from
25%,
number
distributary
channels
86%.
Larger
sources
prediction
uncertainty
(a)
data,
example,
slopes
modulate
fluxes,
(b)
data
flux
distribution
between
individual
outlets,
(c)
theoretical
basis
behind
fluvial
dominance.
Broadly,
these
will
help
improve
natural
anthropogenic
forces
affect
change.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: June 6, 2024
Abstract
Monitoring
sandy
shoreline
evolution
from
years
to
decades
is
critical
understand
the
past
and
predict
future
of
our
coasts.
Optical
satellite
imagery
can
now
infer
such
datasets
globally,
but
sometimes
with
large
uncertainties,
poor
spatial
resolution,
thus
debatable
outcomes.
Here
we
validate
analyse
satellite-derived-shoreline
positions
(1984–2021)
along
Atlantic
coast
Europe
using
a
moving-averaged
approach
based
on
coastline
characteristics,
indicating
conservative
uncertainties
long-term
trends
around
0.4
m/year
potential
bias
towards
accretion.
We
show
that
west-facing
open
coasts
are
more
prone
erosion,
whereas
relatively
closed
favor
accretion,
although
most
computed
fall
within
range
uncertainty.
Interannual
variability
influenced
by
regionally
dominant
atmospheric
climate
indices.
Quasi-straight
coastlines
typically
strongest
alongshore-uniform
links,
while
embayed
coastlines,
especially
those
not
exposed
wave
climate,
weaker
variable
correlation
Our
results
provide
continuum
between
previous
local-scale
studies,
emphasizing
necessity
further
reduce
satellite-derived
trend
uncertainties.
They
also
call
for
applications
relevant
averaging
inclusion
coastal
setting
parameters
unravel
forcing-response
spectrum
shorelines
globally.
Geophysical Research Letters,
Journal Year:
2023,
Volume and Issue:
50(22)
Published: Nov. 20, 2023
Abstract
Beaches
are
highly
variable
environments
and
respond
to
changes
in
wave
forcing,
themselves
modulated
by
climate
variability.
Here,
we
analyze
three
high‐quality
beach
profile
data
sets
robustly
investigate,
for
the
first
time,
link
between
shoreline
change,
forcing
variability
along
Atlantic
coast
of
Europe.
Winter
conditions
strongly
associated
with
North
Oscillation
(NAO)
Western
Europe
Pressure
Anomaly
(WEPA),
WEPA
explaining
50%–80%
winter
power
Shoreline
during
is
also
linked
NAO
WEPA,
25%
both
unrelated
El
Nino
Southern
Oscillation.
In
addition
atmospherically‐forced
morphological
response,
change
depends
on
antecedent
morphology
as
evidenced
significant
correlations
summer/winter
response
position
at
start
each
season.
AMBIO,
Journal Year:
2024,
Volume and Issue:
53(7), P. 1015 - 1036
Published: April 13, 2024
Abstract
The
sustainability
of
social–ecological
systems
within
river
deltas
globally
is
in
question
as
rapid
development
and
environmental
change
trigger
“negative”
or
“positive”
tipping
points
depending
on
actors’
perspectives,
e.g.
regime
shift
from
abundant
sediment
deposition
to
shortage,
agricultural
collapse
rural
urban
land
use.
Using
a
systematic
review
the
literature,
we
show
how
cascading
effects
across
anthropogenic,
ecological,
geophysical
processes
have
triggered
numerous
governance,
hydrological,
land-use
management
world’s
deltas.
Crossing
had
both
positive
negative
that
generally
enhanced
economic
detriment
environment.
Assessment
featured
prominently
revealed
outcomes
can
inform
long-term
trajectory
towards
collapse.
Management
key
drivers
at
delta
scale
place
pathway
sustainable
development.
