Earth Surface Processes and Landforms,
Год журнала:
2024,
Номер
49(11), С. 3308 - 3318
Опубликована: Май 22, 2024
Abstract
Temperature
variation
in
the
past
periods
can
provide
valuable
insights
into
characteristics
and
driving
mechanisms
of
current
global
warming
future
changes.
Branched
glycerol
dialkyl
tetraethers
(brGDGTs)
are
commonly
used
to
as
a
temperature
proxy
quantitatively
reconstruct
However,
it
still
remains
unclear
whether
relation
between
brGDGTs
is
influenced
by
other
environmental
factors,
thereby
affecting
accuracy
quantitative
reconstructions.
A
comprehensive
analysis
across
various
climate
regions
greatly
enhance
reconstructing
Here,
we
investigate
distribution
patterns
soil
using
28
new
topsoils
collected
from
altitudes
ranging
2100
4000
m.a.s.l.
Hengduan
Mountains
southeastern
margin
Tibetan
Plateau
(TP),
compiled
previously
published
brGDGT
data
China.
Our
results
reveal
distinct
humid
arid
regions.
Furthermore,
further
investigated
correlation
indices
factors
both
altitudinal
regional
scales.
At
scale,
exhibit
stronger
with
mean
annual
air
(MAAT)
alkaline
soils
(pH
>
7)
than
that
acidic
<
7).
this
higher
well
(mean
precipitation
[MAP]
800
mm)
semi‐humid
semi‐arid
(400
MAP
(MAP
400
mm).
In
addition,
brGDGT‐inferred
more
affected
but
less
soils.
Therefore,
caution
needed
use
suitable
index
for
palaeotemperature
reconstructions
Science Bulletin,
Год журнала:
2024,
Номер
69(15), С. 2420 - 2429
Опубликована: Апрель 7, 2024
The
term
"Holocene
temperature
conundrum"
refers
to
the
inconsistencies
between
proxy-based
reconstructions
and
transient
model
simulations,
it
challenges
our
understanding
of
global
evolution
during
Holocene.
Climate
indicate
a
cooling
trend
following
Holocene
Thermal
Maximum,
while
simulations
consistent
warming
due
ice-sheet
retreat
rising
greenhouse
gas
concentrations.
Various
factors,
such
as
seasonal
biases
overlooked
feedback
processes,
have
been
proposed
potential
causes
for
this
discrepancy.
In
study,
we
examined
impact
vegetation-climate
on
anomaly
patterns
in
East
Asia
mid-Holocene
(∼6
ka).
By
utilizing
fully
coupled
Earth
system
EC-Earth
performing
with
without
dynamic
vegetation,
objective
was
isolate
influence
vegetation
changes
regional
patterns.
Our
findings
reveal
that
contributed
across
most
Asia,
resulting
spatially
diverse
significantly
improved
model-data
agreement.
These
results
highlight
crucial
role
addressing
conundrum
emphasize
its
importance
simulating
accurate
climate
scenarios.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Янв. 27, 2024
This
transition
from
gathering
to
cultivation
is
a
significant
aspect
of
studying
early
agricultural
practices.
Fruit
trees
are
an
essential
component
food
resources
and
have
played
vital
role
in
both
ancient
modern
production
systems.
The
jujube
(Ziziphus
jujuba
Mill.),
with
its
long
history
northern
China,
holds
great
importance
uncovering
the
diet
prehistoric
humans
understanding
origins
Chinese
civilization.
paper
focuses
on
domestication
by
analyzing
morphology
stones
found
three
Neolithic
sites
China's
Qi
River
basin,
Zhujia,
Wangzhuang,
Dalaidian.
measurements
these
kernels
compared
those
other
areas
as
well
that
were
collected.
revealed
length-to-diameter
(L/D)
ratio
sour
ranged
1.36
1.78,
whereas
L/D
cultivated
varied
between
1.96
4.23.
Furthermore,
obtained
Zhujia
Wangzhuang
exhibit
pointed
ends
possess
elongated
oval
or
narrow
shape
overall,
which
indicative
clearly
artificial
traits.
Therefore,
this
study
suggests
was
selected
important
supplement
basin
no
later
than
around
6200
BP.
CATENA,
Год журнала:
2024,
Номер
241, С. 108032 - 108032
Опубликована: Апрель 16, 2024
The
occurrence
of
extreme
weather
events
in
response
to
climate
change
has
become
a
global
concern.
To
prepare
for
the
intensifying
crisis,
it
is
imperative
comprehend
past
fluctuations,
control
factors,
and
triggers.
In
this
study,
we
conducted
pollen-based
quantitative
reconstruction
Northeast
Asia
paleohydroclimate.
We
collected
387
surface
soil
samples
from
89
mountains
South
Korea
produce
modern
pollen
assemblage
dataset.
As
dataset
indicated
that
reflected
regional
vegetation
well,
applied
weighted
analogue
technique
quantitatively
reconstruct
mean
annual
temperature
(Tann),
precipitation
(Pann),
summer
(Psum)
Gwangyang
area.
reconstructed
Tann
increased
by
ca.
4000
cal
BP
gradually
decreased
thereafter.
Long-term
trends
area,
along
East
Asian
continental
Northwestern
Pacific
margins,
appear
have
been
influenced
oceanic
conditions,
particularly
Kuroshio
Current,
whereas
short-term
were
significantly
correlated
with
climate,
winter
monsoon,
Bond
events.
Pann
Psum
during
Holocene,
which
consistent
induction
monsoon
northward
shift
Intertropical
Convergence
Zone.
After
5000
yr
BP,
decrease
slowed
association
strong
typhoon
activity
El
Niño–Southern
Oscillation.
Analysis
hydroclimate
proxy
data
southern
revealed
wet
at
8900,
7800,
5900,
4500,
3200,
1900,
1300
dry
9300,
8200,
6200,
5200,
2800,
2200,
1400
BP.
Notably,
also
confirmed
flooding
event
8900
Land,
Год журнала:
2024,
Номер
13(3), С. 356 - 356
Опубликована: Март 11, 2024
Arid
central
Asia
(ACA)
is
dominated
by
mid-latitude
westerlies
and
characterized
a
climate
optimum
(a
relatively
humid
that
has
supported
the
development
of
human
culture)
in
clear
contrast
with
monsoonal
during
Holocene.
Significantly,
whether
onset
Holocene
Climate
Optimum
(HCO)
had
an
impact
on
cultural
exchanges
along
ancient
Silk
Road
remains
unknown.
In
this
study,
we
compared
HCO
different
parts
vast
ACA
region
referring
to
variety
previously
established
paleo-moisture/precipitation
records.
Intriguingly,
found
significant
differences
between
western
eastern
ACA.
The
part
(i.e.,
west
Tianshan
Mountains)
mainly
occurred
at
~8
ka
BP
(1
=
1000
cal
yr
BP).
contrast,
~6
northern
Xinjiang
even
as
late
~5
southern
Xinjiang;
delay
2–3
thousand
years
These
results
likely
indicate
time-transgressive
manner
ACA,
namely,
‘early
but
east’.
On
other
hand,
may
have
resulted
inception
wheat
planting
agricultural
civilization
prompted
southward
migration
Afanasievo
culture
after
ka.
Additionally,
initiation
could
provide
environmental
basis
for
spread
millet
area
~4.5
We
speculate
spatial
are
related
temporal
changes
intensity
position
westerly
jet.
Although
increase
insolation
reduction
global
ice
volume
would
led
water
vapor
feeding
around
8
ka,
(namely,
region)
only
become
6
when
were
intensified
became
positioned
south.
Moreover,
delayed
probably
benefited
from
stronger
winds
appeared
5
which
overcome
influence
tall
topography
Mountains.
Therefore,
addition
external
forcing
insolation),
ocean–atmospheric
teleconnection,
regional
topography,
their
connection
system
important
determining
Our
findings
contribute
understanding
spatio-temporal
characteristics
hydroclimate
regions
complex
eco-environmental
systems
diverse
history
activity.
