GEOTRACES: Ironing Out the Details of the Oceanic Iron Sources?
Oceanography,
Год журнала:
2024,
Номер
37(2)
Опубликована: Янв. 1, 2024
Dissolved
iron
(dFe)
is
an
essential
micronutrient
for
phytoplankton,
with
vanishingly
low
oceanic
dissolved
concentrations
(pico-
to
nanomoles
per
kg)
known
limit
growth—and
thus
influence
primary
productivity
and
carbon
cycling—over
much
of
the
surface
ocean.
However,
because
considerable
challenges
associated
contamination-free
sample
collection
accurate
analysis
such
dFe
concentrations,
first
reliable
measurements
came
only
in
1980s.
Further,
by
2003,
despite
several
decades
research,
there
were
~25
full-depth
profiles
worldwide,
dust
considered
be
main
source.
Since
2008,
facilitated
extensive
field
campaign
rigorous
intercalibration
international
GEOTRACES
program,
has
been
“explosion”
availability
data,
hundreds
now
available.
Concurrently,
a
paradigm
shift
view
marine
Fe
cycle
where
multiple
sources
contribute,
some
forms
can
transported
great
distances
through
intermediate
deep
Here,
we
showcase
datasets
across
different
ocean
basins,
synthesize
our
current
multi-source
cycle,
spotlight
sediments
as
important
source,
look
future
directions
constraining
boundary
exchange.
Язык: Английский
Introduction to the special issue on twenty years of GEOTRACES: An international study of the marine biogeochemical cycles of trace elements and isotopes
Oceanography,
Год журнала:
2024,
Номер
37(2)
Опубликована: Янв. 1, 2024
This
special
issue
of
Oceanography
celebrates
the
transformational
findings
international
GEOTRACES
program
in
chemical
oceanography,
20
years
after
drafting
Science
Plan
2004
(GEOTRACES
Planning
Group,
2006).
With
section
cruise
phase
ending
soon,
and
a
planned
pivot
toward
smaller-scale
process
studies,
this
is
an
opportune
time
to
look
back
at
achievements
during
last
two
decades
highlight
some
advances
our
understanding
processes
that
determine
oceanic
distributions
trace
elements
isotopes
(TEIs).
Язык: Английский