On the stability of the troposphere/lower stratosphere and its relationships with cirrus clouds and three mandatory levels over Buenos Aires

Abstract: An unrotated principal components analysis was carried out to establish the most representative modes for the joint variability between the heights of the upper and lower boundaries of cirrus clouds and three different mandatory levels (850, 500, and 100 hPa), and the associated stabil...

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Autores principales: Yuchechen, Adrian E., Lakkis, Susan Gabriela, Lavorato, Mario B.
Formato: Artículo
Lenguaje:Inglés
Publicado: Taylor & Francis 2024
Materias:
TROPOSFERA
ESTRATOSFERA
CIRRO
CLIMATOLOGIA
ATMOSFERA
METEREOLOGIA
Acceso en línea:https://repositorio.uca.edu.ar/handle/123456789/18079
Aporte de:
Repositorio Institucional de la Universidad Católica Argentina (UCA) de Universidad Católica Argentina
id I33-R139-123456789-18079
record_format dspace
spelling I33-R139-123456789-180792024-05-14T05:01:24Z On the stability of the troposphere/lower stratosphere and its relationships with cirrus clouds and three mandatory levels over Buenos Aires Yuchechen, Adrian E. Lakkis, Susan Gabriela Lavorato, Mario B. TROPOSFERA ESTRATOSFERA CIRRO CLIMATOLOGIA ATMOSFERA METEREOLOGIA Abstract: An unrotated principal components analysis was carried out to establish the most representative modes for the joint variability between the heights of the upper and lower boundaries of cirrus clouds and three different mandatory levels (850, 500, and 100 hPa), and the associated stability of the troposphere over Buenos Aires. Discussion is limited to the first three most representative structures found, which consists of spatial patterns (or empirical orthogonal functions, EOFs) and their time-evolving coefficients (or principal components, PCs). EOF1 shows a direct (indirect) mode that encompasses the cirrus slightly below (above) its mean position, with 500 and 100 hPa exhibiting a similar behaviour and 850 hPa acting the opposite way. EOF1 is associated with above-normal stability (instability) for direct (indirect) modes (i.e. positive (negative) values of PC1). On a monthly average, this occurs in the austral winter (summer) months. Regarding EOF2, all three mandatory levels experience positive (negative) height anomalies in direct (indirect) modes and cirrus goes up (down) under mild stability (instability). Monthly averages show that PC2 is approximately positive in summer and in early fall and negative the rest of the year. As to EOF3, it is characterized by a stability similar to that of EOF2, with direct (indirect) modes showing lowered (raised) cirrus and all three mandatory levels above (below) normal conditions; on a monthly basis, PC3 is best described as having a semi-annual evolution, with maxima (minima) in March and October (January and August). Overall, EOF1 has the highest stability or instability, depending upon the sign of PC1. These results are the first of their kind worldwide. 2024-05-13T22:13:00Z 2024-05-13T22:13:00Z 2016 Artículo Yuchechen, A.E., Lakkis, S.G., Mario B. Lavorato, M.B. On the stability of the troposphere/lower stratosphere and its relationships with cirrus clouds and three mandatory levels over Buenos Aires[en línea]. Postprint del artículo publicado en: International Journal of Remote Sensing. 2016, 37(7). doi: 10.1080/01431161.2016.1154221. Disponible en: https://repositorio.uca.edu.ar/handle/123456789/18079 0143-1161 (impreso) 1366-5901 (online) https://repositorio.uca.edu.ar/handle/123456789/18079 080/01431161.2016.1154221 eng Acceso restringido http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Buenos Aires (Argentina : provincia) Taylor & Francis International Journal of Remote Sensing. Vol.37, No.7, 2016
institution Universidad Católica Argentina
institution_str I-33
repository_str R-139
collection Repositorio Institucional de la Universidad Católica Argentina (UCA)
language Inglés
topic TROPOSFERA
ESTRATOSFERA
CIRRO
CLIMATOLOGIA
ATMOSFERA
METEREOLOGIA
spellingShingle TROPOSFERA
ESTRATOSFERA
CIRRO
CLIMATOLOGIA
ATMOSFERA
METEREOLOGIA
Yuchechen, Adrian E.
Lakkis, Susan Gabriela
Lavorato, Mario B.
On the stability of the troposphere/lower stratosphere and its relationships with cirrus clouds and three mandatory levels over Buenos Aires
topic_facet TROPOSFERA
ESTRATOSFERA
CIRRO
CLIMATOLOGIA
ATMOSFERA
METEREOLOGIA
description Abstract: An unrotated principal components analysis was carried out to establish the most representative modes for the joint variability between the heights of the upper and lower boundaries of cirrus clouds and three different mandatory levels (850, 500, and 100 hPa), and the associated stability of the troposphere over Buenos Aires. Discussion is limited to the first three most representative structures found, which consists of spatial patterns (or empirical orthogonal functions, EOFs) and their time-evolving coefficients (or principal components, PCs). EOF1 shows a direct (indirect) mode that encompasses the cirrus slightly below (above) its mean position, with 500 and 100 hPa exhibiting a similar behaviour and 850 hPa acting the opposite way. EOF1 is associated with above-normal stability (instability) for direct (indirect) modes (i.e. positive (negative) values of PC1). On a monthly average, this occurs in the austral winter (summer) months. Regarding EOF2, all three mandatory levels experience positive (negative) height anomalies in direct (indirect) modes and cirrus goes up (down) under mild stability (instability). Monthly averages show that PC2 is approximately positive in summer and in early fall and negative the rest of the year. As to EOF3, it is characterized by a stability similar to that of EOF2, with direct (indirect) modes showing lowered (raised) cirrus and all three mandatory levels above (below) normal conditions; on a monthly basis, PC3 is best described as having a semi-annual evolution, with maxima (minima) in March and October (January and August). Overall, EOF1 has the highest stability or instability, depending upon the sign of PC1. These results are the first of their kind worldwide.
format Artículo
author Yuchechen, Adrian E.
Lakkis, Susan Gabriela
Lavorato, Mario B.
author_facet Yuchechen, Adrian E.
Lakkis, Susan Gabriela
Lavorato, Mario B.
author_sort Yuchechen, Adrian E.
title On the stability of the troposphere/lower stratosphere and its relationships with cirrus clouds and three mandatory levels over Buenos Aires
title_short On the stability of the troposphere/lower stratosphere and its relationships with cirrus clouds and three mandatory levels over Buenos Aires
title_full On the stability of the troposphere/lower stratosphere and its relationships with cirrus clouds and three mandatory levels over Buenos Aires
title_fullStr On the stability of the troposphere/lower stratosphere and its relationships with cirrus clouds and three mandatory levels over Buenos Aires
title_full_unstemmed On the stability of the troposphere/lower stratosphere and its relationships with cirrus clouds and three mandatory levels over Buenos Aires
title_sort on the stability of the troposphere/lower stratosphere and its relationships with cirrus clouds and three mandatory levels over buenos aires
publisher Taylor & Francis
publishDate 2024
url https://repositorio.uca.edu.ar/handle/123456789/18079
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