Geophysical Research Letters,
Год журнала:
2023,
Номер
50(12)
Опубликована: Июнь 23, 2023
Abstract
The
amount
of
snow
on
Arctic
sea
ice
impacts
the
mass
budget.
Wind
redistribution
into
open
water
in
leads
is
hypothesized
to
cause
significant
wintertime
loss.
However,
there
are
no
direct
measurements
loss
leads.
We
measured
lost
four
Central
winter
2020.
find,
contrary
expectations,
that
under
typical
conditions,
minimal
was
during
a
cyclone
delivered
warm
air
temperatures,
high
winds,
and
snowfall,
35.0
±
1.1
cm
equivalent
(SWE)
lead
(per
unit
area).
This
corresponded
removal
0.7–1.1
SWE
from
entire
surface—∼6%–10%
this
site's
annual
precipitation.
Warm
which
increase
length
time
remain
unfrozen,
may
be
an
underappreciated
factor
Elementa Science of the Anthropocene,
Год журнала:
2025,
Номер
13(1)
Опубликована: Янв. 1, 2025
The
projected
transition
of
the
central
Arctic
Ocean
(CAO)
into
a
warmer,
seasonally
ice-free
ocean
requires
more
knowledge
this
environment
to
predict
changes
in
structure
and
dynamics
its
ecosystems.
We
aimed
compare
state
underlying
processes
Nansen
Basin
Amundsen
ecosystems
observed
August–September
2021
assess
impacts
Atlantic
Water
inflow
fresher
Transpolar
Drift
waters,
respectively,
on
these
basins
differed
features
sea
ice,
hydrography,
chemical
biological
compositions.
near-slope
open
water
western
showed
clear
fingerprint
warm,
saline
Water,
with
larger
vertical
turbulent
fluxes
facilitating
nutrient
transport
across
pycnocline
supporting
standing
stocks
bacteria,
protists,
zooplankton.
Pelagic
primary
production
microbial
faunal
decreased
northward
Basin,
likely
due
lower
concentrations,
stronger
stratification,
reduced
light
through
continuous
thicker
ice
snow
cover
possibly
also
impacted
by
declining
levels.
signals
included
salinity,
higher
silicate
concentrations
surface
waters.
Similarities
earlier
observations
increase
small-sized
algae
from
overall
low
abundances
CAO,
suggesting
that
overarching
patterns
remained
unchanged
over
past
decades.
Examples
species
range
extensions
notable
taxon
absences
relative
studies,
however,
could
be
borealization
sea-ice
conditions,
respectively.
Higher
density
ecosystem
sampling
consistent
time
series
are
recommended
confirm
such
conclusions.
distinct
basin
differences
call
for
regional
approach
future
management
CAO.
especially
caution
against
using
area
strong
southern
as
representative
entire
basin,
let
alone
or
Geoscience Data Journal,
Год журнала:
2025,
Номер
12(2)
Опубликована: Март 17, 2025
ABSTRACT
Recent
decline
of
sea
ice
in
the
Barents
Sea
represents
a
clear
manifestation
ongoing
Arctic
warming.
This
study
presents
compilation
data
sets
on
physics
acquired
during
2018–2022
Nansen
Legacy—a
Norwegian
multidisciplinary
national
research
programme
that
focused
northern
Sea.
The
were
using
variety
methods
such
as
coring,
thickness
drillings,
snow
pits,
depth
surveys,
drone
flights,
on‐ice
and
helicopter‐borne
electromagnetic
measurements
thickness,
draft
by
bottom‐anchored
moorings.
collected
cover
several
key
physical
parameters
describing
encompass
range
spatial
(local
to
regional)
temporal
(daily
annual)
scales.
These
aid
filling
substantial
knowledge
gap
recent
conditions
rapidly
changing
region.
Elementa Science of the Anthropocene,
Год журнала:
2025,
Номер
13(1)
Опубликована: Янв. 1, 2025
Sea
salt
aerosol
(SSaer)
significantly
impacts
aerosol-radiation
and
aerosol-cloud
interactions,
sublimated
blowing
snow
is
hypothesized
to
be
an
important
SSaer
source
in
polar
regions.
Understanding
other
wind-sourced
aerosols’
climate
relevant
properties
needed,
especially
during
winter
when
Arctic
amplification
greatest.
However,
most
of
our
understanding
comes
from
modeling
studies,
direct
observations
are
sparse.
Additionally,
can
originate
multiple
sources,
making
it
difficult
disentangle
emission
processes.
Here,
we
present
comprehensive
events
the
Multidisciplinary
drifting
Observatory
for
Study
Climate
(MOSAiC)
expedition
central
Arctic.
High
wind
speed
strongly
enhances
total
number,
submicron
sodium
chloride
mass,
cloud
condensation
nuclei
concentrations,
scattering
coefficients.
Generally,
relative
response
enhancement
strongest
fall
concentrations
lowest.
Blowing
showed
similar
environmental
across
events,
apart
occasions
with
high
age
(>6
days
since
last
snowfall).
Coarse-mode
number
(>1
μm)
better
explained
by
variability
averaged
over
12-h
air
mass
back
trajectories
arriving
at
MOSAiC
site
compared
local,
instantaneous
speed,
suggesting
importance
regional
transport
consideration
history
wind-driven
production.
These
provide
new
insights
into
may
help
validate
studies
improve
model
parameterizations
particularly
indirect
radiative
forcing.
Geophysical Research Letters,
Год журнала:
2025,
Номер
52(9)
Опубликована: Май 8, 2025
Abstract
Sea‐ice
melt
ponds
form
in
the
depressions
of
pre‐melt
surface
topography,
a
process
widely
accepted
yet
lacking
larger‐scale
evaluation
through
explicit
comparisons.
During
MOSAiC,
we
collected
multi‐dimensional
aerial
data
to
examine
relationship
between
topography
and
pond
evolution
across
an
entire
Arctic
ice
floe.
Using
hydrological
models,
analyze
correlation
potential
meltwater
accumulation
areas
identified
winter
spring
topographies,
available
meltwater,
observed
coverage.
Our
findings
demonstrate
strong
connection,
revealing
72%
accuracy
matching
low
ponds,
with
98%
basins
deeper
than
0.5
m
transforming
into
ponds.
Incorporating
assumptions
regarding
availability
improve
predictions
fraction
highlight
key
factors
driving
extensive
lateral
runoff
networks
on
No
significant
differences
are
first‐
second‐year
ice.
This
study
provides
valuable
ground
truth
for
future
modeling
measurements
formation.
Geophysical Research Letters,
Год журнала:
2023,
Номер
50(12)
Опубликована: Июнь 23, 2023
Abstract
The
amount
of
snow
on
Arctic
sea
ice
impacts
the
mass
budget.
Wind
redistribution
into
open
water
in
leads
is
hypothesized
to
cause
significant
wintertime
loss.
However,
there
are
no
direct
measurements
loss
leads.
We
measured
lost
four
Central
winter
2020.
find,
contrary
expectations,
that
under
typical
conditions,
minimal
was
during
a
cyclone
delivered
warm
air
temperatures,
high
winds,
and
snowfall,
35.0
±
1.1
cm
equivalent
(SWE)
lead
(per
unit
area).
This
corresponded
removal
0.7–1.1
SWE
from
entire
surface—∼6%–10%
this
site's
annual
precipitation.
Warm
which
increase
length
time
remain
unfrozen,
may
be
an
underappreciated
factor
