Subtropical and polar cirrus clouds characterized by ground-based lidars and CALIPSO/CALIOP observations
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Resumo
Cirrus clouds are product of weather processes,
and then their occurrence and
macrophysical/optical properties can vary
significantly over different regions of the world.
Lidars can provide height-resolved measurements
with a relatively good both vertical and temporal
resolutions, making them the most suitable
instrumentation for high-cloud observations. The
aim of this work is to show the potential of lidar
observations on Cirrus clouds detection in
combination with a recently proposed
methodology to retrieve the Cirrus clouds
macrophysical and optical features. In this sense,
a few case studies of cirrus clouds observed at
both subtropical and polar latitudes are examined
and compared to CALIPSO/CALIOP
observations. Lidar measurements are carried out
in two stations: the Metropolitan city of Sao Paulo
(MSP, Brazil, 23.3°S 46.4°W), located at
subtropical latitudes, and the Belgrano II base
(BEL, Argentina, 78ºS 35ºW) in the Antarctic
continent. Optical (COD-cloud optical depth and
LR-Lidar Ratio) and macrophysical (top/base
heights and thickness) properties of both the
subtropical and polar cirrus clouds are reported. In
general, subtropical Cirrus clouds present lower
LR values and are found at higher altitudes than
those detected at polar latitudes. In general, Cirrus
clouds are detected at similar altitudes by
CALIOP. However, a poor agreement is achieved
in the LR retrieved between ground-based lidars
and space-borne CALIOP measurements, likely
due to the use of a fixed (or low-variable) LR
value in CALIOP inversion procedures.
Como referenciar
CORDOBA JABONERO, CARMEN; LOPES, FABIO J.S.; LANDULFO, EDUARDO; OCHOA, HECTOR; GIL OJEDA, MANUEL. Subtropical and polar cirrus clouds characterized by ground-based lidars and CALIPSO/CALIOP observations. EPJ Web of Conferences, v. 119, p. 16012-1 - 16012-4, 2016. Disponível em: http://repositorio.ipen.br/handle/123456789/26475. Acesso em: 30 Jun 2026.
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.