Seasonality of pCO2 and air-sea CO2 fluxes in the Central Labrador Sea
Frontiers in Marine Science,
Journal Year:
2024,
Volume and Issue:
11
Published: Oct. 25, 2024
The
Labrador
Sea
in
the
subpolar
North
Atlantic
is
known
for
its
large
air-to-sea
CO
2
fluxes,
which
can
be
around
40%
higher
than
other
regions
of
intense
ocean
uptake
like
Eastern
Pacific
and
within
Northwest
Atlantic.
This
region
also
a
hot-spot
storage
anthropogenic
.
Deep
water
formed
here,
so
that
dissolved
gas
by
surface
directly
connects
to
deeper
waters,
helping
determine
how
much
atmospheric
may
sequestered
(or
released)
deep
ocean.
Currently,
Central
acts
as
year-round
sink
,
with
intensification
driven
biological
production
spring
lasting
through
summer
fall.
Observational
estimates
air-sea
fluxes
rely
upon
very
limited,
scattered
data
distinct
lack
wintertime
observations.
Here,
we
compile
observations
p
from
moorings
underway
measurements,
including
previously
unreported
data,
between
2000
2020,
create
baseline
seasonal
climatology
Sea.
used
reference
compare
against
observational-based
statistical
regional
collection
global
products.
comparison
reveals
systematic
differences
representation
cycle
uncertainties
magnitude
fluxes.
analysis
paramount
importance
long-term,
seasonally-resolved
coverage
this
order
accurately
quantify
size
present
sensitivity
climate
perturbations.
Language: Английский
Enhanced Net Community Production With Sea Ice Loss in the Western Arctic Ocean Uncovered by Machine‐Learning‐Based Mapping
Geophysical Research Letters,
Journal Year:
2024,
Volume and Issue:
51(22)
Published: Nov. 23, 2024
Abstract
In
the
Arctic
Ocean
(AO),
net
community
production
()
has
displayed
spatially
heterogeneous
responses
to
sea
ice
reduction
and
associated
environmental
changes.
Using
a
random
forest
machine
learning
model
trained
with
>42,000
in
situ
measurements
concurrent,
collocated
predictors,
we
reconstructed
19
years
of
8‐day,
6‐km
maps.
During
2015–2021,
integrated
between
late‐May
early‐September
over
western
AO
was
per
year,
interannual
variations
positively
tracking
open
water
area.
While
relationship
area
quasi‐linear
at
high
latitudes,
strong
nonlinearity
detected
on
inflow
shelf.
The
highlights
that
increase
resulted
from
gain
could
be
compounded
by
sea‐ice
loss
induced
ecosystem
adjustments.
Additional
retrospective
analysis
for
2003–2014
suggests
potential
long‐term
export
efficiency
loss.
Language: Английский