Proceedings of the National Academy of Sciences,
Год журнала:
2024,
Номер
121(4)
Опубликована: Янв. 16, 2024
We
demonstrate
an
indirect,
rather
than
direct,
role
of
quasi-resonant
amplification
planetary
waves
in
a
summer
weather
extreme.
find
that
there
was
interplay
between
persistent,
amplified
large-scale
atmospheric
circulation
state
and
soil
moisture
feedbacks
as
precursor
for
the
June
2021
Pacific
Northwest
“Heat
Dome”
event.
An
extended
resonant
wave
configuration
prior
to
event
created
antecedent
deficit
lower
warming
through
strong
nonlinear
feedbacks,
favoring
this
unprecedented
heat
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Фев. 9, 2023
In
late
June
2021
a
heatwave
of
unprecedented
magnitude
impacted
the
Pacific
Northwest
region
Canada
and
United
States.
Many
locations
broke
all-time
maximum
temperature
records
by
more
than
5
°C,
Canadian
national
record
was
broken
4.6
with
new
49.6
°C.
Here,
we
provide
comprehensive
summary
this
event
its
impacts.
Upstream
diabatic
heating
played
key
role
in
anomaly.
Weather
forecasts
provided
advanced
notice
event,
while
sub-seasonal
showed
an
increased
likelihood
heat
extreme
lead
times
10-20
days.
The
impacts
were
catastrophic,
including
hundreds
attributable
deaths
across
Northwest,
mass-mortalities
marine
life,
reduced
crop
fruit
yields,
river
flooding
from
rapid
snow
glacier
melt,
substantial
increase
wildfires-the
latter
contributing
to
landslides
months
following.
These
examples
can
learn
vivid
depiction
how
climate
change
be
so
devastating.
Reviews of Geophysics,
Год журнала:
2023,
Номер
61(2)
Опубликована: Апрель 26, 2023
Abstract
Heat
waves
(HWs)
can
cause
large
socioeconomic
and
environmental
impacts.
The
observed
increases
in
their
frequency,
intensity
duration
are
projected
to
continue
with
global
warming.
This
review
synthesizes
the
state
of
knowledge
scientific
challenges.
It
discusses
different
aspects
related
definition,
triggering
mechanisms,
changes
future
projections
HWs,
as
well
emerging
research
lines
on
subseasonal
forecasts
specific
types
HWs.
We
also
identify
gaps
that
limit
progress
delineate
priorities
for
research.
Overall,
physical
drivers
HWs
not
understood,
partly
due
difficulties
quantification
interactions
responses
climate
change.
Influential
factors
convey
processes
at
spatio‐temporal
scales,
from
warming
large‐scale
atmospheric
circulation
regional
local
affected
area
upwind
regions.
Although
some
thermodynamic
have
been
identified,
there
is
a
lack
understanding
dynamical
aspects,
forcings
feedbacks,
changes.
hampers
attribution
trends
individual
events,
reduces
ability
provide
accurate
projections.
Sustained
observational
networks,
models
diverse
complexity,
narrative‐based
methodological
approaches
artificial
intelligence
offer
new
opportunities
toward
process‐based
interdisciplinary
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Апрель 25, 2023
Abstract
Heatwaves
are
becoming
more
frequent
under
climate
change
and
can
lead
to
thousands
of
excess
deaths.
Adaptation
extreme
weather
events
often
occurs
in
response
an
event,
with
communities
learning
fast
following
unexpectedly
impactful
events.
Using
value
statistics,
here
we
show
where
regional
temperature
records
statistically
likely
be
exceeded,
therefore
might
at-risk.
In
31%
regions
examined,
the
observed
daily
maximum
record
is
exceptional.
Climate
models
suggest
that
similar
behaviour
occur
any
region.
some
regions,
such
as
Afghanistan
parts
Central
America,
this
a
particular
problem
-
not
only
have
they
potential
for
far
heatwaves
than
experienced,
but
their
population
growing
increasingly
exposed
because
limited
healthcare
energy
resources.
We
urge
policy
makers
vulnerable
consider
if
heat
action
plans
sufficient
what
come.
Environmental Research Letters,
Год журнала:
2023,
Номер
18(4), С. 044025 - 044025
Опубликована: Март 21, 2023
Abstract
Eastern
China
experienced
persistent
regional
extreme
heatwaves
in
the
summer
of
2022,
with
disparate
spatial
features
and
formation
mechanisms
different
months.
We
quantitatively
assessed
relative
contributions
three
oceans,
i.e.
tropical
Indian
Ocean
Pacific
North
Atlantic,
local
soil
moisture–temperature
feedback
using
linear
regression.
The
results
showed
that
monthly
mean
atmospheric
circulation
anomalies
failed
to
explain
heatwave
June
2022.
combined
contribution
Indo-Pacific
Atlantic
sea
surface
temperature
(SSTAs),
together
feedback,
explaining
approximately
10%
anomalies.
In
July,
SSTAs
promoted
anomalous
heat
via
meridional
originating
Maritime
Continent,
accounting
for
anomalies,
contributing
same
percentage
by
a
mid-latitude
steady
Rossby
wave.
Local
accounted
42%
produced
strong
western
anticyclone
August,
but
their
direct
was
negligible.
contributed
9%
total
66%,
suggesting
July
drought
exerted
significant
impact
on
subsequent
August
heatwave.
Global
warming
has
greatly
facilitated
heatwaves,
about
30%–40%
these
events
These
also
suggest
climatic
effects
are
evident
month-to-month
variation
summer.
Our
thus
contribute
understanding
prediction
China.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Март 27, 2023
During
summer
2021,
Western
North
America
(WNA)
experienced
an
unprecedented
heatwave
with
record-breaking
high
temperatures
associated
a
strong
anomalous
high-pressure
system,
i.e.,
heat
dome.
Here,
we
use
flow
analog
method
and
find
that
the
dome
over
WNA
can
explain
half
of
magnitude
temperature.
The
intensities
hot
extremes
similar
dome-like
atmospheric
circulations
increase
faster
than
background
global
warming
in
both
historical
change
future
projection.
Such
relationship
between
mean
temperature
be
partly
explained
by
soil
moisture-atmosphere
feedback.
probability
2021-like
is
projected
to
due
warming,
enhanced
feedback
weak
but
still
significantly
increased
circulation.
population
exposure
such
will
also
increase.
Limiting
1.5
°C
instead
2
(3
°C)
would
lead
avoided
impact
53%
(89%)
under
RCP8.5-SSP5
scenario.
Communications Earth & Environment,
Год журнала:
2023,
Номер
4(1)
Опубликована: Сен. 5, 2023
Abstract
In
the
province
of
British
Columbia,
Canada,
four
most
severe
wildfire
seasons
last
century
occurred
in
past
7
years:
2017,
2018,
2021,
and
2023.
To
investigate
trends
activity
fire-conducive
climate,
we
conducted
an
analysis
mapped
perimeters
annual
climate
data
for
period
1919–2021.
Results
show
that
after
a
century-long
decline,
fire
increased
from
2005
onwards,
coinciding
with
sharp
reversal
wetting
trend
20th
century.
Even
as
precipitation
levels
remain
high,
moisture
deficits
have
due
to
rapid
warming
evaporative
demand.
Bottom-up
factors
further
influence
activity,
legacy
wildfires,
insect
outbreaks,
land-use
practices
continually
regimes.
The
compound
effects
climate-induced
changes
altered
fuels
now
force
Columbians
confront
harsh
reality
more
frequent
years
intense
prolonged
activity.
npj Climate and Atmospheric Science,
Год журнала:
2023,
Номер
6(1)
Опубликована: Фев. 17, 2023
Abstract
Extreme
summer
temperatures
are
increasingly
common
across
the
Northern
Hemisphere
and
inflict
severe
socioeconomic
biological
consequences.
In
2021,
Pacific
Northwest
region
of
North
America
(PNW)
experienced
a
2-week-long
extreme
heatwave,
which
contributed
to
record-breaking
temperatures.
Here,
we
use
tree-ring
records
show
that
in
as
well
rate
summertime
warming
during
last
several
decades,
unprecedented
within
context
millennium
for
PNW.
absence
committed
efforts
curtail
anthropogenic
emissions
below
intermediate
levels
(SSP2–4.5),
climate
model
projections
indicate
rapidly
increasing
risk
PNW
regularly
experiencing
2021-like
temperatures,
with
50%
chance
yearly
occurrence
by
2050.
The
2021
provide
benchmark
impetus
communities
historically
temperate
climates
account
heat-related
impacts
change
adaptation
strategies.
