Atmospheric Research,
Journal Year:
2021,
Volume and Issue:
266, P. 105959 - 105959
Published: Dec. 7, 2021
This
study
highlights
the
occurrence
of
atmospheric
rivers
(ARs)
over
northwest
Africa
towards
Europe,
which
were
accompanied
by
intense
episodes
Saharan
dust
transport
all
way
to
Scandinavia,
in
winter
season.
Using
a
combination
observational
and
reanalysis
data,
we
investigate
two
extreme
dusty
AR
events
February
2021
assess
their
impact
on
snow
melt
Alps.
The
warm,
moist,
air
mass
(spatially-averaged
2-meter
temperature
water
vapour
mixing
ratio
anomalies
up
8
K
3
g
kg−1,
aerosol
optical
depths
loadings
0.85
11
m−2,
respectively)
led
50%
40%
decrease
depth
surface
albedo,
respectively,
less
than
one
month
during
ARs
show
increasing
trends
past
4
decades,
with
78%
associated
severe
Europe.
Nature Communications,
Journal Year:
2020,
Volume and Issue:
11(1)
Published: Nov. 24, 2020
Compound
events
(CEs)
are
weather
and
climate
that
result
from
multiple
hazards
or
drivers
with
the
potential
to
cause
severe
socio-economic
impacts.
Compared
isolated
hazards,
hazards/drivers
associated
CEs
can
lead
higher
economic
losses
death
tolls.
Here,
we
provide
first
analysis
of
multivariate
potentially
causing
high-impact
floods,
droughts,
fires.
Using
observations
reanalysis
data
during
1980-2014,
analyse
27
hazard
pairs
spatial
estimates
their
occurrences
on
global
scale.
We
identify
hotspots
including
many
socio-economically
important
regions
such
as
North
America,
Russia
western
Europe.
relative
importance
different
in
six
continental
highlight
posing
highest
risk.
Our
results
initial
guidance
assess
regional
risk
CE
an
observationally-based
dataset
aid
evaluation
models
for
simulating
CEs.
Journal of Advances in Modeling Earth Systems,
Journal Year:
2020,
Volume and Issue:
12(12)
Published: Nov. 18, 2020
Abstract
We
present
an
unprecedented
set
of
high‐resolution
climate
simulations,
consisting
a
500‐year
pre‐industrial
control
simulation
and
250‐year
historical
future
from
1850
to
2100.
A
configuration
the
Community
Earth
System
Model
version
1.3
(CESM1.3)
is
used
for
simulations
with
nominal
horizontal
resolution
0.25°
atmosphere
land
models
0.1°
ocean
sea‐ice
models.
At
these
resolutions,
model
permits
tropical
cyclones
mesoscale
eddies,
allowing
interactions
between
synoptic
phenomena
large‐scale
circulations.
An
overview
results
provided
focus
on
drift,
mean
climate,
internal
modes
variability,
representation
climates,
extreme
events.
Comparisons
are
made
solutions
identical
using
standard
(nominal
1°)
CESM1.3
available
observations
period
address
some
key
scientific
questions
concerning
impact
benefit
increasing
in
simulations.
emerging
prominent
feature
intermittent
occurrence
polynyas
Weddell
Sea
its
interaction
Interdecadal
Pacific
Oscillation.
Overall,
show
significant
improvements
representing
global
temperature
changes,
seasonal
cycle
sea‐surface
mixed
layer
depth,
events
relationships
modes.
Science Advances,
Journal Year:
2020,
Volume and Issue:
6(29)
Published: July 15, 2020
Precipitation
extremes
will
likely
intensify
under
climate
change.
However,
much
uncertainty
surrounds
intensification
of
high-magnitude
events
that
are
often
inadequately
resolved
by
global
models.
In
this
analysis,
we
develop
a
framework
involving
targeted
dynamical
downscaling
historical
and
future
extreme
precipitation
produced
large
ensemble
model.
This
is
applied
to
"atmospheric
river"
storms
in
California.
We
find
substantial
(10
40%)
increase
total
accumulated
precipitation,
with
the
largest
relative
increases
valleys
mountain
lee-side
areas.
also
report
even
higher
more
spatially
uniform
hourly
maximum
intensity,
which
exceed
Clausius-Clapeyron
expectations.
Up
85%
arises
from
thermodynamically
driven
water
vapor,
smaller
contribution
increased
zonal
wind
strength.
These
findings
imply
challenges
for
flood
management
California,
given
intense
atmospheric
river-induced
extremes.
Geoscientific model development,
Journal Year:
2021,
Volume and Issue:
14(8), P. 5023 - 5048
Published: Aug. 13, 2021
Abstract.
TempestExtremes
(TE)
is
a
multifaceted
framework
for
feature
detection,
tracking,
and
scientific
analysis
of
regional
or
global
Earth
system
datasets
on
either
rectilinear
unstructured/native
grids.
Version
2.1
the
TE
now
provides
extensive
support
examining
both
nodal
(i.e.,
pointwise)
areal
features,
including
tropical
extratropical
cyclones,
monsoonal
lows
depressions,
atmospheric
rivers,
blocking,
precipitation
clusters,
heat
waves.
Available
operations
include
thresholding,
calculations
quantities
related
to
features
such
as
accumulated
cyclone
energy
azimuthal
wind
profiles,
filtering
data
based
characteristics
stereographic
compositing.
This
paper
describes
core
algorithms
(kernels)
that
have
been
added
since
version
1.0,
editing
pointwise
trajectory
files,
composition
fields
around
generation
masks
via
thresholding
tracking
in
time.
Several
examples
are
provided
how
these
kernels
can
be
combined
produce
composite
evaluating
understanding
common
their
underlying
processes.
These
analyzing
fraction
from
compositing
meteorological
calculating
fractional
contribution
poleward
vapor
transport
building
climatology
blocks.
