Global Biogeochemical Cycles,
Journal Year:
2023,
Volume and Issue:
37(2)
Published: Jan. 28, 2023
Abstract
Over
the
past
century,
increased
atmospheric
CO
2
concentrations
have
enhanced
photosynthesis
through
fertilization
across
globe.
However,
growth
has
also
led
to
greater
respiration
rates—both
from
vegetation
(autotrophic
respiration)
and
breakdown
of
plant
litter
soil
organic
matter
(heterotrophic
respiration).
The
resulting
change
in
carbon
flux—and
its
spatial
distribution—that
can
be
attributed
increasing
climate
remains
unknown.
We
used
Carbon
Data
Model
Framework,
a
model‐data
fusion
system
that
assimilates
global
observations
satellites
other
sources
create
an
ensemble
observationally
constrained
cycle
representations,
determine
fluxes
associated
1920
2015.
Across
globe,
response
dominates
their
alone.
regional
distribution
sink
attributable
is
strongly
influenced
by
'loss
ratio
gained'—the
fraction
lost
respiration.
While
wet
tropics'
flux
1.4
times
larger
than
temperate
region,
net
uptake
actually
1.25
due
heterotrophic
growth.
At
scale,
loss
gained
83
±
0.6%.
Our
results
highlight
importance
responses
regulating
land
sink.
Revista Brasileira de Ciência do Solo,
Journal Year:
2024,
Volume and Issue:
48
Published: Jan. 1, 2024
ABSTRACT
Carbon
flows
into
and
out
of
the
soil
are
important
processes
that
contribute
to
controlling
global
climate.
The
relationship
between
organisms
climate
is
interdependent
since
carbon
greenhouse
gas
fluxes
simultaneously
affected
by
change
management.
Temperature,
moisture,
pH,
nutrient
level,
redox
potential
organic
matter
quality
key
elements
affecting
microorganisms
involved
in
soil.
Climate,
topography
(slope
position
landscape),
texture,
mineralogy
land-use
regulate
those
and,
thus,
C
pedosphere.
Soil
microbes
can
increase
influx
storage
promoting
plant
growth,
mycorrhizal
establishment,
particle
aggregation.
Conversely,
efflux
from
via
methanogenesis,
rhizospheric
activity,
mineralization.
Nevertheless,
strategies
management
practices
could
be
used
balance
emissions
atmosphere.
For
example,
stimulated
growth
microorganisms,
greater
diversity
crop
rotation
cover
crops,
cultivating
mycotrophic
plants,
avoiding
or
reducing
use
fungicides
adopting
farming,
no-tillage
systems
conservative
strategies.
Therefore,
this
review
aimed
shed
light
on
how
influxes
soil,
its
significance
for
change.
Then,
we
also
seek
gather
practical
actions
proposed
scientific
literature
improve
sequestration
In
summary,
provides
a
comprehensive
basis
as
helpers
lessen
increasing
fixation
agroecosystems
stimulation
application
beneficial
microorganisms.
Global Change Biology,
Journal Year:
2024,
Volume and Issue:
30(8)
Published: Aug. 1, 2024
Terrestrial
gross
primary
productivity
(GPP)
is
the
largest
carbon
flux
in
global
cycle
and
plays
a
crucial
role
terrestrial
sequestration.
However,
historical
future
GPP
estimates
still
vary
markedly.
In
this
study,
we
reduced
uncertainties
by
employing
an
innovative
emergent
constraint
method
on
remote
sensing-based
datasets
(RS-GPP),
using
ground-based
of
from
towers
as
observational
constraint.
Using
approach,
2001-2014
was
estimated
to
be
126.8
±
6.4
PgC
year
Global Change Biology,
Journal Year:
2022,
Volume and Issue:
29(3), P. 731 - 746
Published: Oct. 25, 2022
The
spatial
dispersion
of
photoelements
within
a
vegetation
canopy,
quantified
by
the
clumping
index
(CI),
directly
regulates
within-canopy
light
environment
and
photosynthesis
rate,
but
is
not
commonly
implemented
in
terrestrial
biosphere
models
to
estimate
ecosystem
carbon
cycle.
A
few
global
CI
products
have
been
developed
recently
with
remote
sensing
measurements,
making
it
possible
examine
impacts
CI.
This
study
deployed
radiative
transfer
scheme
Community
Land
Model
version
5
(CLM5)
used
revised
CLM5
quantitatively
evaluate
extent
which
can
affect
canopy
absorbed
radiation
gross
primary
production
(GPP),
for
first
time,
considering
uncertainty
seasonal
variation
multiple
products.
Compared
results
without
impact,
estimated
that
sunlit
up
9%-15%
23%-34%
less
direct
diffuse
radiation,
respectively,
while
shaded
3%-18%
more
across
different
biome
types.
on
conditions
included
changes
absorption,
sunlit-shaded
leaf
area
fraction
related
nitrogen
distribution
thus
maximum
rate
Rubisco
carboxylase
activity
(Vcmax
),
together
decreased
5.9-7.2
PgC
year-1
enhanced
6.9-8.2
canopy.
With
higher
use
efficiency
leaves,
increased
compensated
exceeded
lost
resulting
1.0
±
0.12
net
increase
GPP.
GPP
due
input
datasets
was
much
larger
than
caused
variations,
50%
magnitude
interannual
variations
tropical
regions.
highlights
necessity
its
models.
Environments,
Journal Year:
2022,
Volume and Issue:
9(9), P. 112 - 112
Published: Sept. 1, 2022
The
Paris
Climate
Agreement
(PA)
provides
an
overall
target
which
limits
global
warming
to
“well
below
2
°C
above
pre-industrial
levels”
and
“pursuing
efforts
limit
the
temperature
increase
1.5
(Art.
para.
1
PA).
This
article
assesses
extent
new
insights
can
be
derived
from
recent
IPCC
reports
for
interpretation
of
Art.
PA
a
legal
perspective.
To
this
end,
analyses
contributions
Working
Groups
I
III
sixth
assessment
report.
Methodologically,
we
compare
findings
with
previously
published
reports,
namely
report
fifth
A
core
concepts
human
rights
follows.
Several
empirical
indications
show
that
current
greenhouse
gas
budget
calculations
are
quite
generous.
We
provide
five
arguments
clearly
point
in
direction.
These
arguments,
combined
demonstrate
budgets
must
smaller
than
those
estimated
by
IPCC.
based
on
Agreement,
as
well
precautionary
principle.
norms
contain
obligation
minimise
risk
significant
damage,
i.e.,
take
rapid
drastic
climate
protection
measures.
implies:
is
legally
binding
target;
adherence
requires
very
high
probability
achieving
overshoot
geoengineering
tend
prohibited,
sceptical
factual
assumptions.
have
also
been
confirmed
rulings
supreme
courts,
such
ground-breaking
decision
German
Federal
Constitutional
Court.
underline
IPCC—even
compared
83
percent
scenario
latest
assessment.
Thus,
policy
will
raise
its
ambitions
towards
zero
fossil
fuels
reduction
livestock
farming
times
Ukraine
war.
New Phytologist,
Journal Year:
2023,
Volume and Issue:
240(2), P. 565 - 576
Published: Aug. 7, 2023
Summary
Below
and
aboveground
vegetation
dynamics
are
crucial
in
understanding
how
climate
warming
may
affect
terrestrial
ecosystem
carbon
cycling.
In
contrast
to
biomass,
the
response
of
belowground
biomass
long‐term
has
been
poorly
studied.
Here,
we
characterized
impacts
decadal
geothermal
at
two
levels
(on
average
+3.3°C
+7.9°C)
on
below
plant
stocks
production
a
subarctic
grassland.
Soil
did
not
change
standing
root
even
decreased
fine
reduced
production.
Decadal
soil
also
significantly
alter
root–shoot
ratio.
The
linear
stepwise
regression
model
suggested
that
following
10
yr
warming,
temperature
was
no
longer
direct
driver
these
responses,
but
losses
N
were.
losses,
due
warming‐induced
decreases
organic
matter
water
retention
capacity,
were
identified
as
key
above
reduction
accompanied
by
thinner
roots
with
increased
specific
area.
These
results
indicate
after
decade
productivity
studied
grassland
affected
mainly
N.
