Gümüşhane Üniversitesi Fen Bilimleri Enstitüsü Dergisi,
Journal Year:
2023,
Volume and Issue:
unknown
Published: Oct. 30, 2023
Hava
kirliliği,
sanayileşmenin
yaygınlaşması,
artan
araç
sayısı,
tarımsal
faaliyetler
ve
şehirleşme
gibi
faktörler
neticesinde
dünya
genelinde
ciddi
bir
sorun
teşkil
etmektedir.
kalitesinin
bozulmasına
sebep
olan
temel
faktör
ise
hava
kirletici
konsantrasyon
değerlerindeki
artıştır.
Meteorolojik
hadiselerden
biri
sis
fenomeni,
kararlı
atmosferik
koşullarda
meydana
gelen
belirli
bölgede
emisyonlarının
hapsolmasına
sebebiyet
vererek
bunların
konsantrasyonlarının
artmasına
neden
önemli
faktörlerden
biridir.
Bu
çalışmada,
Tekirdağ
ili
için
2018-2022
yılları
arası
sisli
olmayan
günlerdeki
konsantrasyonları
analiz
edilerek
aralarındaki
ilişki
ortaya
konulmaya
çalışılmıştır.
Çorlu
Havalimanı
tarafından
yayımlanan
havacılık
rasatları
kullanılarak
günlerin
tespiti
yapılmıştır.
Ayrıca,
havalimanı
rasatlarından
temin
edilen
bazı
meteorolojik
parametrelerin
(sıcaklık,
çiy
noktası
sıcaklığı,
rüzgar
şiddeti/yönü
bağıl
nem)
analizleri
gerçekleştirilmiştir.
Sisli
tüm
kalitesi
değerlerine
erişim
T.C.
Çevre,
Şehircilik
İklim
Değişikliği
Bakanlığı
ücretsiz
olarak
halka
sunulan
veri
bankası
kullanılmıştır.
günler
aylık
yıllık
bazda
analizler
gerçekleştirilmiş,
bu
periyotlardaki
değişimleri
incelenmiş
parametrelerinden
partikül
madde
(PM10)
değişimler
irdelenmiştir.
Yapılan
sonucunda,
diğer
günlere
oranla
PM10
değerlerinin
günlerde
daha
çok
olduğu
gözlenmiş,
sonbahar
kış
mevsimlerinde
gün
sayılarındaki
artışa
paralel
yoğunluğunun
arttığı
tespit
edilmiştir.
Atmospheric chemistry and physics,
Journal Year:
2025,
Volume and Issue:
25(5), P. 3253 - 3267
Published: March 17, 2025
Abstract.
Enhancing
the
understanding
of
fog
microphysical
processes
is
essential
for
reducing
uncertainty
in
forecasts,
particularly
predicting
visibility
and
duration.
To
investigate
complex
interactions
between
aerosols
microphysics
their
impacts
on
degradation,
simultaneous
measurements
aerosol
characteristics
were
conducted
from
April
to
May
2023
at
a
mountain
site
(1483
m
a.s.l.)
Yangtze
River
Delta
(YRD)
region,
China.
In
this
study,
eight
events
investigated
during
campaign,
revealing
significantly
higher
droplet
number
concentrations
(Nd)
compared
those
observed
clean
areas.
A
strong
correlation
was
found
pre-fog
concentration
(Na)
peak
Nd
each
event,
indicating
substantial
influence
pre-existing
levels
microphysics.
Water
vapor
supersaturation
ratio
(SS)
within
fogs
estimated
0.07
%
±
0.02
%,
slightly
than
previous
estimates
urban
suburban
The
broadening
size
distribution
(DSD)
formation,
development,
mature
stages
dominantly
driven
by
activation,
condensation,
collision–coalescence
mechanisms,
respectively.
This
evolution
process
often
led
DSD
shift
unimodal
trimodal
distribution,
with
peaks
around
6,
12,
23
µm.
For
occurring
under
high
Na
background,
notable
decrease
temperature
stage
promoted
secondary
activation-dominated
process,
resulting
formation
numerous
small
droplets
reduction
large
size.
can
(VIS)
fogs.
Detailed
comparison
several
calculation
methods
suggests
that
estimating
based
extinction
only
considerable
overprediction
when
100
<VIS≤1000
m.
results
highlight
necessity
incorporating
both
anthropogenically
polluted
regions.
Atmospheric Research,
Journal Year:
2024,
Volume and Issue:
309, P. 107570 - 107570
Published: July 9, 2024
Measurements
of
fog
microphysics
were
conducted
during
the
winter
season
2021
‐2022
at
Barakah
Nuclear
Power
Plant
(BNPP),
located
in
Western
coastal
region
United
Arab
Emirates.
Twelve
events
observed
this
period.
The
primary
objective
study
is
to
detail
microphysical
characteristics
these
and
refine
current
visibility
parameterization
schemes
based
on
in-situ
measurements
properties.
All
are
found
share
a
common
feature
bimodal
distribution
droplet
number
concentration
(Nd),
with
modes
4.5
μm
23.2
μm.
Despite
high
proportion
smaller
droplets
associated
fine
mode,
greatest
contribution
liquid
water
content
(LWC)
comes
essentially
from
medium
large
between
10
35
recalibration
existing
revealed
that
increase
horizontal
increasing
FI
(fog
index)
tends
be
more
gradual
for
studied
cases
compared
standard
schemes.
Additionally,
sedimentation
velocity,
estimated
maximum
1.85
cm
s−1,
occurs
predominantly
LWC
range
100–200
mg
m−3,
corresponding
median
volume
diameter
24.8
Our
findings
shed
new
light
complexity
its
impact
visibility,
underscoring
their
importance
refining
weather
models
accurate
forecasting.
Atmosphere,
Journal Year:
2023,
Volume and Issue:
14(7), P. 1101 - 1101
Published: June 30, 2023
In
the
Yellow
and
Bohai
Seas,
detailed
characteristics
of
visibility
are
analyzed
based
on
automatic
hourly
observation
data
marine
between
2019
2021.
The
results
show
that
annual
average
in
Seas
is
13.346
km.
at
high
latitudes
higher
than
low
Seas.
area
mainly
distributed
southwest
Sea.
There
obvious
seasonal
differences
Visibility
from
September
to
November,
with
maximum
values
October.
lowest
July
when
minimum
high.
spring
overall
relatively
low,
areas
appear
autumn
high,
occur
northern
part
has
significant
intraday
variation.
around
sunset
significantly
sunrise.
4:00
9:00,
most
likely
7:00.
16:00
21:00,
highest
18:00.
Low
occurs
frequently
November
April,
all
March.
often
may
any
time
also
mornings
May
August.
It
less
other
times.
Remote Sensing,
Journal Year:
2023,
Volume and Issue:
15(18), P. 4541 - 4541
Published: Sept. 15, 2023
The
goal
of
this
work
is
to
analyze
how
double
inversion
layers
affect
fog–haze
events
and
boundary
over
Eastern
China
based
on
unmanned
aerial
vehicle
observations.
During
10–12
December
2020,
two
successive
occurred
in
China.
Based
the
(UAV),
wind,
temperature,
relative
humidity
(RH),
aerosol
mass
concentration
were
monitored
simultaneously
Lianyungang,
Several
observations
found
after
analyzing
physical
fields
these
data.
results
show
that
concentrations
air
pollutants
during
fog
negatively
correlated
with
horizontal
visibilities.
particulate
matter
increased
rapidly
(After
08:00
BJT
11)
dissipation
stages
(PM2.5
PM10
from
97
150
μg/m3
213
300
μg/m3,
respectively).
Double
temperature
significantly
affected
events,
where
enhancement
lower-level
(where
layer
top
height
was
between
m)
corresponded
explosive
growth
upper-level
layer.
(The
bottom
350
m
600
This
indicates
end
events.
Fog
thicknesses
are
near-surface
thickening
near
surface
corresponds
an
increase
(after
05:00
11
03:00
12)
height.
event
maintained
when
water
vapor
conditions
favorable
enough
or
there
a
deep
but
maintenance
at
intensity
above
2
°C
(100
m)−1
mainly
contributes
durations
Calculations
through
trajectory
model
reveal
pollutant
source
varied
which
main
reason
for
difference
