Evaluation of the transport of atmospheric Sahara dust on Natal-RN through the LIDAR technique of depolarization
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Data de publicação
2018
Autores IPEN
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INTERNATIONAL WORKSHOP ON SAND/DUSTSTORMS AND ASSOCIATED DUSTFALL, 9th
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Resumo
The
objective
of
this
work
is
describe
some
results
of
the
Natal
LIDAR
system
(DUSTER),
an
integrating
station
of
The
Latin
America
Lidar
Network
(LALINET),
aimed
to
detect
and
evaluate
the
transcontinental
transport
of
Sahara
dust
(SD)
to
the
Brazilian
territory
during
the
aerosol
MOnitoring
campaign
Long-‐range
Transportation
OVer
Natal
I
(MOLOTOV
I)
which
occurred
from
December
2016
to
February
2017.
The
city
of
Natal
is
located
in
northeastern
Brazil
and
is
one
of
the
continental
points
closest
to
the
African
continent,
a
important
fact
to
observe
the
entry
of
SD
in
the
South
American
continent.
The
DUSTER
system
allows
the
detection
of
signals
at
wavelengths
of
355
nm,
532
nm
(parallel),
532
nm
(perpendicular)
and
1064
nm.
To
detect
and
characterize
SD
aerosols
and
other
particles
in
the
atmosphere,
DUSTER
uses
the
ability
of
suspended
aerosol
particles
to
change
the
polarization
state
of
light.
The
data
retrieved
by
DUSTER
allow
calculate
fundamental
parameters
in
the
characterization
of
atmospheric
aerosols
such
as
linear
volume
depolarization
ratio
(𝛿!)
and
particle
linear
depolarization
ratio
(𝛿!).
Campaign
data
showed
that
on
a
few
days
the
value
of
𝛿!
varied
between
0.09
and
0.33
at
a
transport
altitude
within
the
range
of
1-‐3.3
km
above
sea
level
indicating
in
some
cases
probably
a
mixture
of
SD
with
other
types
of
aerosols
such
as
marine
particles,
anthropogenic
pollution
or
biomass
burning
smoke.
The
data
obtained
with
DUSTER
have
allowed
verify
the
seasonality
of
this
transport,
the
altitudes
of
detected
particles
and
study
its
optical
properties.
Como referenciar
GUEDES, ANDERSON G.; LANDULFO, EDUARDO; HOELZEMANN, JUDITH; LOPES, FABIO J.S.; SILVA, MARCOS P.A.; SANTOS, RENATA S.S.; GUERRERO-RASCADO, JUAN L.; ALADOS-ARBOLEDAS, LUCAS; DUARTE, EDICLE S.F. Evaluation of the transport of atmospheric Sahara dust on Natal-RN through the LIDAR technique of depolarization. In: INTERNATIONAL WORKSHOP ON SAND/DUSTSTORMS AND ASSOCIATED DUSTFALL, 9th, May 22-24, 2018, Tenerife, Spain. Abstract... p. 249-249. Disponível em: http://repositorio.ipen.br/handle/123456789/30128. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.