Abstract
Independent
evidence
from
Europe
and
Asia
shows
that
tree‐ring
stable
isotopes
can
reveal
persistent
long‐term
hydroclimate
trends
are
generally
not
captured
by
more
traditional
dendroclimatic
studies
using
width
or
density.
Since
the
recently
observed
discrepancy
between
flatter
“growth‐dependent”
varying
“growth‐independent”
climate
proxy
data
is
unrelated
to
possible
biases
of
statistical
age‐trend
removal,
I
call
for
a
conceptual
rethinking
predictive
power
different
parameters
reconstructing
variability
on
interannual
multimillennial
timescales.
describe
why
wood
density
measurements
usually
lack
abiotic
signals
ultra‐long
timescales,
whereas
carbon
oxygen
isotopic
ratios
cellulose
capture
environmental
variation
well
beyond
segment
length
individual
samples.
Caution
therefore
advised
when
information
diverse
combined
in
multiproxy
reconstructions
Holocene
aim
reflect
full
range
variability.
This
Perspective
only
emphasizes
paleoclimatic
value
be
obtained
living
relict
wood.
It
also
stresses
need
developing
new
high‐resolution
datasets
species
regions
both
hemispheres
supplement
existing
record.
article
categorized
under:
Paleoclimates
Current
Trends
>
Paleoclimate
Land,
Journal Year:
2025,
Volume and Issue:
14(2), P. 234 - 234
Published: Jan. 23, 2025
During
the
Middle-to-Late
Neolithic
period
(7000–3800
BP),
Shaanxi
Province
served
as
a
critical
juncture
in
transmission
of
crops.
Foxtail
millet
(Setaria
italica),
broomcorn
(Panicum
miliaceum),
and
rice
(Oryza
sativa)
spread
westwards
into
Gansu–Qinghai
region
southwards
Sichuan
basin,
whilst
wheat
(Triticum
aestivum)
barley
(Hordeum
vulgare)
were
transmitted
through
to
middle
lower
Yellow
River
regions.
settlements
are
found
all
three
main
geomorphic
settings
Shaanxi:
Loess
Plateau,
plains,
mountainous
areas.
While
extent
which
crop
diffusion
distribution
influenced
by
environmental
changes
has
previously
been
highlighted,
strategies
utilization
different
contexts
have
not
specified.
Based
on
crop-remains
data
from
33
archaeological
sites
Shaanxi,
this
study
uses
statistical
modeling
ArcGIS-based
spatial
analysis
investigate
prehistoric
during
its
determinants.
Our
results
indicate
following:
(1)
The
dominant
crops
foxtail
millet,
with
proportion
increasing
over
time.
(2)
Guanzhong
Plain
was
earliest
adopt
(~7000–3800
BP).
Subsequently,
had
Qinba
Mountains
~5000
BP
at
latest.
By
~3800
BP,
affected
entire
northern
only
Shimao
site
around
4000
BP.
Finally,
In
addition,
rice,
wheat,
mainly
enhanced
agricultural
diversity
but
limited
impact
Northern
where
cattle
sheep
enriched
subsistence
since
about
4500
(3)
Environmental
factors
extents—elevation
river
proximity
minimal
effects
significantly
presence
barley.
These
led
pattern
dominated
while
developed
mixed
farming
systems
incorporating
four
seed
types.
This
provides
new
insights
mechanisms
influencing
human
adaptation
Shaanxi.
Nature Communications,
Journal Year:
2025,
Volume and Issue:
16(1)
Published: Feb. 3, 2025
Abstract
Given
growing
concerns
about
global
climate
change,
it
is
critical
to
understand
both
historical
and
current
shifts
in
the
hydroclimate,
particularly
regions
critically
entwined
with
circulation.
The
Tibetan
Plateau,
Earth’s
largest
highest
plateau,
a
nexus
for
atmospheric
processes,
significantly
influencing
East
Asian
hydroclimate
dynamics
through
synergy
of
Monsoon
Westerlies.
Yet,
understanding
recent
fluctuations
their
wide-ranging
ecological
societal
consequences
remains
challenging
due
short
instrumental
observations
partly
ambiguous
proxy
reconstructions.
Here,
we
present
precisely-dated
3476-year
precipitation
reconstruction
derived
from
tree-ring
δ
18
O
data
on
representing
one
few
multi-millennia-long
annually-resolved
terrestrial
records
date.
Our
findings
reveal
that
20
th
century
drought
extremes
are
severe
within
past
three
millennia,
likely
linked
weakening
Westerlies
anthropogenic
aerosol
emissions.
Additionally,
our
analyses
identified
distinct
stages
(110
BC–AD
280,
AD
330–770
950–1300)
characterized
by
toward
arid
conditions,
corresponding
significant
social
unrest
dynasty
collapses,
which
underscores
potential
impacts
hydroclimatic
shifts.
Earth system science data,
Journal Year:
2022,
Volume and Issue:
14(10), P. 4777 - 4791
Published: Oct. 28, 2022
Abstract.
Millet
agriculture,
i.e.,
broomcorn
millet
(Panicum
miliaceum)
and
foxtail
(Setaria
italica),
initially
originated
in
northern
China
provided
the
basis
for
emergence
of
first
state
Central
Plains.
However,
owing
to
lack
a
comprehensive
archaeobotanical
dataset,
when,
where,
how
these
two
types
evolved
across
different
regions
periods
remains
unclear.
Here,
we
presented
dataset
macroremains
(n=538)
spanning
Neolithic
Bronze
ages
suggested
significant
spatiotemporal
divergence
agriculture
subhumid
mid-lower
Yellow
River
(MLY)
semiarid
agro-pastoral
ecotone
(APE).
The
key
timing
diffusion
transition
occurred
around
6000
cal.
BP,
coinciding
with
Holocene
Optimum
(8000–6000
BP)
Miaodigou
Age
(6200–5500
BP).
It
spread
westward
northward
from
MLY
APE
underwent
dramatic
low-yield
high-yield
millet.
combined
influence
warm-wet
climate,
population
pressure,
field
management
may
have
promoted
intensification,
diffusion,
BP.
Thereafter,
cropping
patterns
were
predominated
by
(∼
80
%),
while
those
focused
on
both
60
%)
under
persistent
drying
trend
since
mid-Holocene.
This
study
quantitative
during
China,
which
can
be
used
evaluating
prehistoric
human
subsistence,
discussing
past
human–environment
interaction,
providing
valuable
perspective
agricultural
sustainability
future.
is
publicly
available
at
https://doi.org/10.5281/zenodo.6669730
(He
et
al.,
2022).
