Diurnal variation of precipitable water vapor over Central and South America

Annual and seasonal diurnal precipitable water vapor (PWV) variations over Central and South America are analyzed for the period 2007e2013. PWV values were obtained from Global Navigation Satellite Systems (GNSS) observations of sixty-nine GNSS tracking stations. Histograms by climate categories sho...

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Autores principales:	Meza, Amalia Margarita, Mendoza, Luciano Pedro Oscar, Natali, María Paula, Bianchi, Clara Eugenia, Fernández, Laura Isabel
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2020
Materias:	Ciencias Astronómicas Precipitable water vapor Global navigation satellite systems Köppen and Geiger climate type classification Surface temperature Principal component analysis
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/119499
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-119499
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Astronómicas Precipitable water vapor Global navigation satellite systems Köppen and Geiger climate type classification Surface temperature Principal component analysis
spellingShingle	Ciencias Astronómicas Precipitable water vapor Global navigation satellite systems Köppen and Geiger climate type classification Surface temperature Principal component analysis Meza, Amalia Margarita Mendoza, Luciano Pedro Oscar Natali, María Paula Bianchi, Clara Eugenia Fernández, Laura Isabel Diurnal variation of precipitable water vapor over Central and South America
topic_facet	Ciencias Astronómicas Precipitable water vapor Global navigation satellite systems Köppen and Geiger climate type classification Surface temperature Principal component analysis
description	Annual and seasonal diurnal precipitable water vapor (PWV) variations over Central and South America are analyzed for the period 2007e2013. PWV values were obtained from Global Navigation Satellite Systems (GNSS) observations of sixty-nine GNSS tracking stations. Histograms by climate categories show that PWV values for temperate, polar and cold dry climate have a positive skewed distribution and for tropical climates (except for monsoon subtype) show a negative skewed distribution. The diurnal PWV and surface temperatures (T) anomaly datasets are analyzed by using principal components analysis (PCA). The first two modes represent more than 90% of the PWV variability. The first PCA mode of PWV variability shows a maximum amplitude value in the late afternoon few hours later than the respective values for surface temperature (T), therefore the temperature and the surface conditions (to yield evaporation) could be the main agents producing this variability; PWV variability in inland stations are mainly represented by this mode. The second mode of PWV variability shows a maximum amplitude at midnight, a possible explanation of this behavior is the effect of the sea/valley breeze. The coastal and valley stations are affected by this mode in most cases. Finally, the “undefined” stations, surrounded by several water bodies, are mainly affected by the second mode with negative eigenvectors. In the seasonal analysis, both the undefined and valley stations constitute the main cases that show a sea or valley breeze only during some seasons, while the rest of the year they present a behavior according to their temperature and the surface conditions. As a result, the PCA proves to be a useful numerical tool to represent the main sub-daily PWV variabilities.
format	Articulo Articulo
author	Meza, Amalia Margarita Mendoza, Luciano Pedro Oscar Natali, María Paula Bianchi, Clara Eugenia Fernández, Laura Isabel
author_facet	Meza, Amalia Margarita Mendoza, Luciano Pedro Oscar Natali, María Paula Bianchi, Clara Eugenia Fernández, Laura Isabel
author_sort	Meza, Amalia Margarita
title	Diurnal variation of precipitable water vapor over Central and South America
title_short	Diurnal variation of precipitable water vapor over Central and South America
title_full	Diurnal variation of precipitable water vapor over Central and South America
title_fullStr	Diurnal variation of precipitable water vapor over Central and South America
title_full_unstemmed	Diurnal variation of precipitable water vapor over Central and South America
title_sort	diurnal variation of precipitable water vapor over central and south america
publishDate	2020
url	http://sedici.unlp.edu.ar/handle/10915/119499
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bdutipo_str	Repositorios
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Diurnal variation of precipitable water vapor over Central and South America

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