Abstract.
In
this
study,
an
unmanned
aerial
vehicle
(UAV)
platform
with
sensing
and
sampling
systems
was
developed
for
three-dimensional
(3D)
measurements
of
air
pollutant
concentrations.
The
system
contains
multiple
microsensors
Internet
Things
devices
determining
the
3D
distributions
four
critical
pollutants
two
meteorological
parameters
in
real
time.
Moreover,
comprises
remote-controllable
gas
kits,
each
which
a
Tedlar
bag
1
L
measurement
volatile
organic
compound
concentrations
according
to
TO-15
method
US
Environmental
Protection
Agency.
performance
UAV
verified
experiments
where
it
used
detect
emissions
from
large
industrial
zone
Taiwan
that
included
traditional
park,
precision
machinery
municipal
waste
incineration
plant.
Three
locations
were
selected
as
field
sites
prevailing
local
wind
direction.
vertical
pollutants,
ambient
temperature,
relative
humidity
determined
data
gathered
at
aforementioned
March
May
2023.
A
total
56
72
chemical
species
qualitatively
quantitatively
analyzed
these
periods,
respectively.
experimental
results
feasibility
using
proposed
accurately
evaluating
concentration
distribution
transport
zone.
can
be
part
Method
To-15,
thus
extending
measure
VOCs
area.
serve
useful
tool
management
decision-making
process
pollution
areas.
Atmospheric measurement techniques,
Год журнала:
2025,
Номер
18(8), С. 1841 - 1857
Опубликована: Апрель 24, 2025
Abstract.
The
planetary
boundary
layer
(PBL)
dynamics
play
a
critical
role
in
shaping
urban
atmospheric
processes
by
governing
the
exchange
of
energy,
momentum,
and
mass
within
lower
atmosphere.
This
study
investigates
PBL
Hefei,
city
western
Yangtze
River
Delta
(YRD),
using
3
years
(June
2019
to
June
2022)
Doppler
wind
lidar
data.
Seasonal
diurnal
variations
key
parameters,
including
profiles,
shear
intensity,
turbulent
mixing,
low-level
jets
(LLJs),
mixing
height
(MLH),
are
analyzed.
Results
show
that
horizontal
speeds
accelerate
more
rapidly
above
km
with
predominant
westerly
winds
(270°±15°)
all
seasons.
vertical
depth
high-wind
zone
(>8
m
s−1)
during
day
is
found
be
generally
deeper
than
at
night,
particularly
winter.
In
LLJs
primarily
form
sunset
dissipate
noon,
typically
altitudes
between
0.5
0.6
throughout
year,
except
July.
LLJ
occurrences
most
frequent
spring
(31.7
%),
followed
summer
(24.7
autumn
(22.3
winter
(21.3
%).
Summer
intensified,
extending
up
1.5
km.
larger
gradient
below
significantly
enhances
turbulence
intensity
near
ground
night.
seasonal
average
MLH
peaks
14:00
15:00
UTC+8,
reaching
approximately
1.2
summer.
Cloud
cover
raises
about
100
night
but
decreases
it
200
afternoon
peak.
provides
insights
into
lidar-based
highlights
implications
for
local
standards
concerning
low-altitude
economic
activities.
Atmospheric Environment,
Год журнала:
2023,
Номер
316, С. 120162 - 120162
Опубликована: Окт. 18, 2023
A
network
of
five
low-cost
air
pollution
sensor
(LCS)
nodes
was
deployed
vertically
on
the
exterior
H.
C.
Ørsted
Institute
at
University
Copenhagen,
Denmark,
to
investigate
transport
from
road
below.
All
LCS
measured
PM2.5,
NO2,
and
O3
1-min
time
resolution,
one
them
also
noise.
Traffic
monitored
with
a
webcam,
where
traffic
type
levels
were
derived
using
machine-learning
algorithm.
We
investigated
how
well
traffic-related
pollution,
noise,
real-time
counts
serve
as
proxies
for
another.
The
correlations
between
count
exhibited
relatively
low
values
when
considering
all
data.
However,
these
significantly
increased
under
southwesterly
wind
direction
speed,
reaching
R2
=
0.40
NO2
0.51
volume,
0.70
noise
total
volume.
These
results
indicate
common
source,
namely
traffic,
three
parameters.
spanning
25
m
had
extremely
intervariability
minimum
R2-values
0.99
0.78
0.95
O3.
system
could
not
detect
vertical
gradient
in
levels.
Large-Eddy
Simulation
model
runs
PALM
generally
supported
lack
observed
observations.
Under
slightly
unstable
stratification,
concentration
remained
constant
height
southerly
winds.
Conversely,
winds
north,
west,
northwest
showed
an
increase
height.
For
other
directions,
decreased
by
approximately
40
%–50
%,
which
is
strong
neutral
attributed
enhanced
mixing
stratification.
Based
measurements
modeling,
we
conclude
that
profile
very
sensitive
conditions,
outside
window
fifth-floor
office
almost
same
ground
floor.
Journal of Geophysical Research Atmospheres,
Год журнала:
2024,
Номер
129(11)
Опубликована: Июнь 1, 2024
Abstract
Fungal
aerosols,
as
significant
biocomponents
of
inhalable
particulate
matter,
encompass
a
variety
allergens
and
pathogens.
However,
comprehensive
knowledge
regarding
their
composition,
sources,
opportunistic
pathogens
present
in
severe
air
pollution
remains
limited.
In
this
study,
PM
2.5
samples
were
collected
from
January
to
March
2018
northern
Chinese
city,
during
the
winter
heating
spring
sandstorm
seasons.
The
fungal
community
characteristics
within
three
distinct
haze
haze‐dust
composite
examined.
concentration
aerosols
was
found
be
significantly
higher
dust
samples.
This
evidenced
by
strong
positive
correlation
with
Ca
2+
,
temperature,
wind
speed
(
p
<
0.05).
Human
animal
pathogens,
such
Candida
more
prevalent
Conversely,
plant
like
Alternaria
primary
ecological
function
shifted
being
saprophytic
becoming
human‐animal
pathogenic
or
plant‐animal
pathogenic.
shift
observed
non‐pollution,
haze,
pollution.
dispersion
influenced
factors
events
meteorological
conditions,
including
increased
temperature
speed.
episodes,
dust‐related
pollutants,
soil
10
accounted
for
51.39%
variation
community.
research
explored
dynamics
communities,
potential
influencing
communities
regional
insights
garnered
provide
robust
foundation
subsequent
human
health
exposure
assessments.
