Monitoring cirrus clouds with lidar in the Southern Hemisphere : a local study over Buenos Aires. 1. Tropopause heights

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Abstract: Cirrus clouds in the upper troposphere and the lower stratosphere have recently drawn much attention due to their important role and impact on the atmospheric radiative balance. Because they are located in the upper troposphere their study requires a high resolution technique not only to d...

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Autores principales: Lakkis, Susan Gabriela, Lavorato, Mario, Canziani, Pablo O.
Otros Autores: Universidad Católica Argentina (Buenos Aires). Facultad de Ciencias Agrarias
Formato: Artículo
Lenguaje:Inglés
Publicado: 2019
Materias:
NUBES CIRRUS
LIDAR
TROPOPAUSA
Acceso en línea:https://repositorio.uca.edu.ar/handle/123456789/5419
Aporte de:
Repositorio Institucional de la Universidad Católica Argentina (UCA) de Universidad Católica Argentina
id I33-R139-123456789-5419
record_format dspace
spelling I33-R139-123456789-54192024-03-07T12:27:03Z Monitoring cirrus clouds with lidar in the Southern Hemisphere : a local study over Buenos Aires. 1. Tropopause heights Lakkis, Susan Gabriela Lavorato, Mario Canziani, Pablo O. Universidad Católica Argentina (Buenos Aires). Facultad de Ciencias Agrarias Universidad Católica Argentina (Buenos Aires). Equipo Interdisciplinario para el Estudio de Procesos Atmosféricos en el Cambio Global Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina). División Radar Laser CEILAP NUBES CIRRUS LIDAR TROPOPAUSA Abstract: Cirrus clouds in the upper troposphere and the lower stratosphere have recently drawn much attention due to their important role and impact on the atmospheric radiative balance. Because they are located in the upper troposphere their study requires a high resolution technique not only to detect them but also to characterize their behaviour and evolution. A good dynamic range in lidar backscattering signals is necessary to observe and improve our knowledge of cirrus clouds, and thereof, atmospheric parameters in the troposphere and UT/LS due to their vicinity to the tropopause layer. The lidar system measures, in real time, the evolution of the atmospheric boundary layer, stratospheric aerosols, tropopause height and cirrus clouds evolution. The aim of the work is to present the main properties of cirrus clouds over central Argentina and to monitor tropopause height together with their temporal evolution using a backscatter lidar system located in Buenos Aires (34.6 °S, 58.5 °W). A cirrus clouds detection method was used to analyze a set of 60 diurnal events, during 2001–2005, in order to estimate tropopause height and its temporal evolution, using the top of cirrus clouds present on the upper troposphere as a tropopause tracer. The results derived from lidar show a remarkable good agreement when compared with rawinsonde data, considering values of tropopause height with differences less than or equal to 500 m, depending on the signal to noise ratio of the measurements. Clouds properties analysis reveals the presence of thick cirrus clouds with thickness between 0.5 and 4.2 km, with the top cloud located at the tropopause height 2019-06-06T00:48:10Z 2019-06-06T00:48:10Z 2009 Artículo Lakkis, S. G., Lavorato, M. y P. O. Canziani. 2009. Monitoring cirrus clouds with lidar in the southern hemisphere : a local stydy over Buenos Aires. 1. Tropopause heights [en línea]. Atmospheric Research 92. doi:10.1016/j.atmosres.2008.08.003 Disponible en: https://repositorio.uca.edu.ar/handle/123456789/5419 https://repositorio.uca.edu.ar/handle/123456789/5419 eng Acceso al texto completo del documento desde un puesto fijo de la Biblioteca Central https://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf BUENOS AIRES ARGENTINA Atmospheric Research 92, 2009
institution Universidad Católica Argentina
institution_str I-33
repository_str R-139
collection Repositorio Institucional de la Universidad Católica Argentina (UCA)
language Inglés
topic NUBES CIRRUS
LIDAR
TROPOPAUSA
spellingShingle NUBES CIRRUS
LIDAR
TROPOPAUSA
Lakkis, Susan Gabriela
Lavorato, Mario
Canziani, Pablo O.
Monitoring cirrus clouds with lidar in the Southern Hemisphere : a local study over Buenos Aires. 1. Tropopause heights
topic_facet NUBES CIRRUS
LIDAR
TROPOPAUSA
description Abstract: Cirrus clouds in the upper troposphere and the lower stratosphere have recently drawn much attention due to their important role and impact on the atmospheric radiative balance. Because they are located in the upper troposphere their study requires a high resolution technique not only to detect them but also to characterize their behaviour and evolution. A good dynamic range in lidar backscattering signals is necessary to observe and improve our knowledge of cirrus clouds, and thereof, atmospheric parameters in the troposphere and UT/LS due to their vicinity to the tropopause layer. The lidar system measures, in real time, the evolution of the atmospheric boundary layer, stratospheric aerosols, tropopause height and cirrus clouds evolution. The aim of the work is to present the main properties of cirrus clouds over central Argentina and to monitor tropopause height together with their temporal evolution using a backscatter lidar system located in Buenos Aires (34.6 °S, 58.5 °W). A cirrus clouds detection method was used to analyze a set of 60 diurnal events, during 2001–2005, in order to estimate tropopause height and its temporal evolution, using the top of cirrus clouds present on the upper troposphere as a tropopause tracer. The results derived from lidar show a remarkable good agreement when compared with rawinsonde data, considering values of tropopause height with differences less than or equal to 500 m, depending on the signal to noise ratio of the measurements. Clouds properties analysis reveals the presence of thick cirrus clouds with thickness between 0.5 and 4.2 km, with the top cloud located at the tropopause height
author2 Universidad Católica Argentina (Buenos Aires). Facultad de Ciencias Agrarias
author_facet Universidad Católica Argentina (Buenos Aires). Facultad de Ciencias Agrarias
Lakkis, Susan Gabriela
Lavorato, Mario
Canziani, Pablo O.
format Artículo
author Lakkis, Susan Gabriela
Lavorato, Mario
Canziani, Pablo O.
author_sort Lakkis, Susan Gabriela
title Monitoring cirrus clouds with lidar in the Southern Hemisphere : a local study over Buenos Aires. 1. Tropopause heights
title_short Monitoring cirrus clouds with lidar in the Southern Hemisphere : a local study over Buenos Aires. 1. Tropopause heights
title_full Monitoring cirrus clouds with lidar in the Southern Hemisphere : a local study over Buenos Aires. 1. Tropopause heights
title_fullStr Monitoring cirrus clouds with lidar in the Southern Hemisphere : a local study over Buenos Aires. 1. Tropopause heights
title_full_unstemmed Monitoring cirrus clouds with lidar in the Southern Hemisphere : a local study over Buenos Aires. 1. Tropopause heights
title_sort monitoring cirrus clouds with lidar in the southern hemisphere : a local study over buenos aires. 1. tropopause heights
publishDate 2019
url https://repositorio.uca.edu.ar/handle/123456789/5419
work_keys_str_mv AT lakkissusangabriela monitoringcirruscloudswithlidarinthesouthernhemispherealocalstudyoverbuenosaires1tropopauseheights
AT lavoratomario monitoringcirruscloudswithlidarinthesouthernhemispherealocalstudyoverbuenosaires1tropopauseheights
AT canzianipabloo monitoringcirruscloudswithlidarinthesouthernhemispherealocalstudyoverbuenosaires1tropopauseheights
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