Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Янв. 28, 2025
Late
Miocene
climate
evolution
provides
an
opportunity
to
assess
Earth's
sensitivity
carbon
cycle
perturbation
under
warmer-than-modern
conditions.
Despite
its
relevance
for
understanding
the
system,
driving
mechanisms
underlying
profound
and
changes
–
including
enigmatic
cooling
from
7
5.4
million
years
ago
remain
unclear.
Here,
we
present
magnetic
geochemical
paleoceanographic
proxies
a
hydrogenetic
ferromanganese
crust
retrieved
in
northwestern
Pacific
Ocean.
Our
results
indicate
striking
50%
surge
deep
ocean
phosphorus
concentrations
occurred
4
ago,
synchronous
with
enhanced
oxygen
consumption.
Employing
global
biogeochemical
model,
show
that
increased
continental
weathering,
without
concurrent
rise
silicate
contributed
decline
atmospheric
CO2
associated
over
Miocene.
This
suggests
prominent
decoupling
of
weathering
during
major
cycling
event
last
10
years.
West
new
insights
Cooling
weathering.
The
uplift
of
the
Qinghai-Tibet
Plateau
is
one
greatest
geological
events
on
Earth,
pivotally
shaping
biogeographic
patterns
across
continents,
especially
for
migratory
species
that
need
to
overcome
topographical
barriers
fulfil
their
annual
circle.
However,
how
influences
animal
migration
strategies
remains
largely
unclear.
We
compare
current
flyways
50
avian
migrating
plateau
with
those
reconstructed
before
as
a
counterfactual.
find
major
effect
changing
directions
from
latitudinal
longitudinal.
monsoon
system
generated
by
rather
than
high
elevation
per
se
shapes
changes.
These
findings
unveil
mechanism
an
important
global
event
has
influenced
birds,
yielding
testable
hypotheses
observed
distributions
emerge.
The
uplift
of
the
Qinghai-Tibet
Plateau
is
one
greatest
geological
events
on
Earth,
pivotally
shaping
biogeographic
patterns
across
continents,
especially
for
migratory
species
that
need
to
overcome
topographical
barriers
fulfil
their
annual
circle.
However,
how
influences
animal
migration
strategies
remains
largely
unclear.
We
compare
current
flyways
50
avian
migrating
plateau
with
those
reconstructed
before
as
a
counterfactual.
find
major
effect
changing
directions
from
latitudinal
longitudinal.
monsoon
system
generated
by
rather
than
high
elevation
per
se
shapes
changes.
These
findings
unveil
mechanism
an
important
global
event
has
influenced
birds,
yielding
testable
hypotheses
observed
distributions
emerge.
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Янв. 28, 2025
Late
Miocene
climate
evolution
provides
an
opportunity
to
assess
Earth's
sensitivity
carbon
cycle
perturbation
under
warmer-than-modern
conditions.
Despite
its
relevance
for
understanding
the
system,
driving
mechanisms
underlying
profound
and
changes
–
including
enigmatic
cooling
from
7
5.4
million
years
ago
remain
unclear.
Here,
we
present
magnetic
geochemical
paleoceanographic
proxies
a
hydrogenetic
ferromanganese
crust
retrieved
in
northwestern
Pacific
Ocean.
Our
results
indicate
striking
50%
surge
deep
ocean
phosphorus
concentrations
occurred
4
ago,
synchronous
with
enhanced
oxygen
consumption.
Employing
global
biogeochemical
model,
show
that
increased
continental
weathering,
without
concurrent
rise
silicate
contributed
decline
atmospheric
CO2
associated
over
Miocene.
This
suggests
prominent
decoupling
of
weathering
during
major
cycling
event
last
10
years.
West
new
insights
Cooling
weathering.
