Annual anomalies and trends for TOMS reflectivities (1978-2005) in the Southern Hemisphere

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Abstract: Annual anomalies of Lambertian equivalent reflectivity (LER) retrieved from the total ozone mapping spectrometer spanning the period November 1978–November 2005 were studied in the Southern Hemisphere, in a region bounded by 0° S and 60° S, and their trends were estimated. With the excepti...

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Autores principales: Yuchechen, Adrian E., Lakkis, Susan Gabriela, Canziani, Pablo O.
Formato: Artículo
Lenguaje:Inglés
Publicado: Remote Sensing and Photogrammetry Society 2019
Materias:
CAMBIO CLIMATICO
CALENTAMIENTO GLOBAL
METEOROLOGIA
REFLECTIVIDAD
CLIMATOLOGIA
INVESTIGACION
HEMISFERIO SUR
Acceso en línea:https://repositorio.uca.edu.ar/handle/123456789/5415
Aporte de:
Repositorio Institucional de la Universidad Católica Argentina (UCA) de Universidad Católica Argentina
id I33-R139-123456789-5415
record_format dspace
spelling I33-R139-123456789-54152025-06-23T17:03:50Z Annual anomalies and trends for TOMS reflectivities (1978-2005) in the Southern Hemisphere Yuchechen, Adrian E. Lakkis, Susan Gabriela Canziani, Pablo O. CAMBIO CLIMATICO CALENTAMIENTO GLOBAL METEOROLOGIA REFLECTIVIDAD CLIMATOLOGIA INVESTIGACION HEMISFERIO SUR Abstract: Annual anomalies of Lambertian equivalent reflectivity (LER) retrieved from the total ozone mapping spectrometer spanning the period November 1978–November 2005 were studied in the Southern Hemisphere, in a region bounded by 0° S and 60° S, and their trends were estimated. With the exception of few regions where the variable may represent the contribution of both cloudiness and snow, trends in LER anomalies provided an evolution of total cloudiness. On average, the study region experienced a net increase in LER values of 0.78 reflectivity units (RU) decade−1; if only significant trend values are considered this figure increased to 1.18 RU decade−1. The region that showed the largest upward trend, up to 4 RU decade−1, was located over the eastern Pacific, off the coasts of Chile and Peru, where the presence of marine stratocumulus is frequent. Despite the overall positive trend there were regions that yielded a negative one, most notably the tropical latitudes of South America and Africa. The yearly zonal means also showed a positive trend at all latitudes, but significance occurred beyond 20° S only. Correlation maps between LER anomalies and five different circulation indices were also introduced. The indices with the highest and lowest number of significant correlation values were the Madden–Julian oscillation at 70° E and the quasi-biennial Oscillation, respectively. 2019-06-06T00:48:09Z 2019-06-06T00:48:09Z 2017 Artículo Yuchechen, A.E., Lakkis, S.G., Canziani, P.O. Annual anomalies and trends for TOMS reflectivities (1978-2005) in the Southern Hemisphere . International journal of remote sensing 38(12), 2017 Disponible en: https://repositorio.uca.edu.ar/handle/123456789/5415 0143-1161 e-1366-5901 https://repositorio.uca.edu.ar/handle/123456789/5415 eng Acceso Abierto https://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Remote Sensing and Photogrammetry Society International Journal of Remote Sensing Vol. 38 Nº 12, 2017 ISSN 0143-1161 e-ISSN 1366-5901
institution Universidad Católica Argentina
institution_str I-33
repository_str R-139
collection Repositorio Institucional de la Universidad Católica Argentina (UCA)
language Inglés
topic CAMBIO CLIMATICO
CALENTAMIENTO GLOBAL
METEOROLOGIA
REFLECTIVIDAD
CLIMATOLOGIA
INVESTIGACION
HEMISFERIO SUR
spellingShingle CAMBIO CLIMATICO
CALENTAMIENTO GLOBAL
METEOROLOGIA
REFLECTIVIDAD
CLIMATOLOGIA
INVESTIGACION
HEMISFERIO SUR
Yuchechen, Adrian E.
Lakkis, Susan Gabriela
Canziani, Pablo O.
Annual anomalies and trends for TOMS reflectivities (1978-2005) in the Southern Hemisphere
topic_facet CAMBIO CLIMATICO
CALENTAMIENTO GLOBAL
METEOROLOGIA
REFLECTIVIDAD
CLIMATOLOGIA
INVESTIGACION
HEMISFERIO SUR
description Abstract: Annual anomalies of Lambertian equivalent reflectivity (LER) retrieved from the total ozone mapping spectrometer spanning the period November 1978–November 2005 were studied in the Southern Hemisphere, in a region bounded by 0° S and 60° S, and their trends were estimated. With the exception of few regions where the variable may represent the contribution of both cloudiness and snow, trends in LER anomalies provided an evolution of total cloudiness. On average, the study region experienced a net increase in LER values of 0.78 reflectivity units (RU) decade−1; if only significant trend values are considered this figure increased to 1.18 RU decade−1. The region that showed the largest upward trend, up to 4 RU decade−1, was located over the eastern Pacific, off the coasts of Chile and Peru, where the presence of marine stratocumulus is frequent. Despite the overall positive trend there were regions that yielded a negative one, most notably the tropical latitudes of South America and Africa. The yearly zonal means also showed a positive trend at all latitudes, but significance occurred beyond 20° S only. Correlation maps between LER anomalies and five different circulation indices were also introduced. The indices with the highest and lowest number of significant correlation values were the Madden–Julian oscillation at 70° E and the quasi-biennial Oscillation, respectively.
format Artículo
author Yuchechen, Adrian E.
Lakkis, Susan Gabriela
Canziani, Pablo O.
author_facet Yuchechen, Adrian E.
Lakkis, Susan Gabriela
Canziani, Pablo O.
author_sort Yuchechen, Adrian E.
title Annual anomalies and trends for TOMS reflectivities (1978-2005) in the Southern Hemisphere
title_short Annual anomalies and trends for TOMS reflectivities (1978-2005) in the Southern Hemisphere
title_full Annual anomalies and trends for TOMS reflectivities (1978-2005) in the Southern Hemisphere
title_fullStr Annual anomalies and trends for TOMS reflectivities (1978-2005) in the Southern Hemisphere
title_full_unstemmed Annual anomalies and trends for TOMS reflectivities (1978-2005) in the Southern Hemisphere
title_sort annual anomalies and trends for toms reflectivities (1978-2005) in the southern hemisphere
publisher Remote Sensing and Photogrammetry Society
publishDate 2019
url https://repositorio.uca.edu.ar/handle/123456789/5415
work_keys_str_mv AT yuchechenadriane annualanomaliesandtrendsfortomsreflectivities19782005inthesouthernhemisphere
AT lakkissusangabriela annualanomaliesandtrendsfortomsreflectivities19782005inthesouthernhemisphere
AT canzianipabloo annualanomaliesandtrendsfortomsreflectivities19782005inthesouthernhemisphere
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