Reducing Long‐Standing Surface Ozone Overestimation in Earth System Modeling by High‐Resolution Simulation and Dry Deposition Improvement
Yang Gao,
Wenbin Kou,
Wenxuan Cheng
и другие.
Journal of Advances in Modeling Earth Systems,
Год журнала:
2025,
Номер
17(3)
Опубликована: Март 1, 2025
Abstract
The
overestimation
of
surface
ozone
concentration
in
low‐resolution
global
atmospheric
chemistry
and
climate
models
has
been
a
long‐standing
issue.
We
first
update
the
dry
deposition
scheme
both
high‐
(0.25°)
(1°)
Community
Earth
System
Model
(CESM)
version
1.3
runs,
by
adding
effects
leaf
area
index
correcting
sunlit
shaded
fractions
stomatal
resistances.
With
this
update,
5‐year‐long
summer
simulations
(2015–2019)
using
CESM
still
exhibit
substantial
(by
6.0–16.2
ppbv)
over
U.S.,
Europe,
eastern
China,
pollution
hotspots.
is
further
improved
adjusting
cuticle
conductance,
reducing
mean
bias
19%,
increasing
model
resolution
reduces
43%.
elucidate
mechanism
which
grid
spacing
influences
simulated
ozone,
revealing
distinctive
pathways
urban
versus
rural
areas.
In
areas,
mainly
affects
daytime
levels,
where
additional
NO
x
emissions
from
nearby
areas
result
an
boost
simulations.
contrast,
follows
similar
due
to
influence
volatile
organic
compounds
surrounding
However,
nighttime
closely
linked
weakened
titration
owing
redistribution
Additionally,
stratosphere‐troposphere
exchange
may
also
contribute
high‐resolution
simulations,
warranting
investigation.
This
optimized
enhance
understanding
formation
mechanisms,
sources,
changes
warming
climate.
Язык: Английский
Advancing high-resolution modeling to unravel the interplay between extreme weather events and air pollution under global warming
Frontiers of Environmental Science & Engineering,
Год журнала:
2025,
Номер
19(7)
Опубликована: Май 19, 2025
Язык: Английский
Enhanced understanding of atmospheric blocking modulation on ozone dynamics within a high-resolution Earth system model
Atmospheric chemistry and physics,
Год журнала:
2025,
Номер
25(5), С. 3029 - 3048
Опубликована: Март 14, 2025
Abstract.
High
surface
ozone
concentrations
pose
substantial
health
risks,
yet
understanding
the
factors
influencing
levels,
especially
role
of
large-scale
circulations,
remains
incomplete.
A
key
challenge
is
accurately
modeling
both
circulations
and
concentrations.
Using
a
high-resolution
Earth
system
model
(25
km
atmospheric
resolution),
we
explore
how
local
meteorology
affect
levels.
Our
results
show
that
heat
waves
can
trigger
increases
in
by
stimulating
biogenic
volatile
organic
compound
(BVOC)
emissions
during
summers
2015–2019.
For
example,
maximum
daily
8
h
(MDA8)
increase
12.0
ppbv
southeastern
US,
9.7
Europe,
17.6
North
China,
9.0
central
eastern
China
compared
to
non-heat-wave
periods.
In
addition
effects,
blocking
strongly
influences
downstream
meteorological
conditions
formation.
Focusing
on
pollution
identify
three
major
pathways
Rossby
wave
propagation
based
locations:
Euro-Atlantic
sector,
northern
Russia,
Pacific.
These
lead
increased
air
temperature
intensify
downward
solar
radiation
downstream.
The
impact
most
pronounced
where
MDA8
5.9
10.7
non-blocking
periods,
followed
(2.1
4.9
ppbv).
Blocking
also
stimulates
BVOC
emissions,
enhancing
10.6
15.9
these
regions.
findings
highlight
critical
circulation
shaping
regional
quality,
under
warming
climate.
Язык: Английский