ENSO-related moisture and temperature anomalies over South America derived from GPS radio occultation profiles

El Niño Southern Oscillation- (ENSO) related anomaly patterns of monthly specific humidity (q), precipitable water content (PW) and temperature (T) over South America are analysed using the FORMOSAT-3/COSMIC mission data (August 2006–December 2013). The Global Positioning System radio occultation (G...

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Autores principales:	Llamedo, P., Hierro, R., de la Torre, A., Alexander, P.
Formato:	JOUR
Materias:	ENSO FORMOSAT-3/COSMIC precipitable water South America Atmospheric humidity Atmospheric pressure Atmospheric temperature Global positioning system Nickel Oceanography Time series analysis Wavelet transforms Continuous Wavelet Transform Equatorial Pacific Ocean High vertical resolution Precipitable water Precipitable water content Climatology air temperature atmospheric moisture COSMIC El Nino-Southern Oscillation FORMOSAT GPS temperature anomaly
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_08998418_v37_n1_p268_Llamedo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_08998418_v37_n1_p268_Llamedo
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spelling	todo:paper_08998418_v37_n1_p268_Llamedo2023-10-03T15:44:28Z ENSO-related moisture and temperature anomalies over South America derived from GPS radio occultation profiles Llamedo, P. Hierro, R. de la Torre, A. Alexander, P. ENSO FORMOSAT-3/COSMIC precipitable water South America Atmospheric humidity Atmospheric pressure Atmospheric temperature Global positioning system Nickel Oceanography Time series analysis Wavelet transforms Continuous Wavelet Transform ENSO Equatorial Pacific Ocean FORMOSAT-3/COSMIC High vertical resolution Precipitable water Precipitable water content South America Climatology air temperature atmospheric moisture COSMIC El Nino-Southern Oscillation FORMOSAT GPS precipitable water temperature anomaly South America El Niño Southern Oscillation- (ENSO) related anomaly patterns of monthly specific humidity (q), precipitable water content (PW) and temperature (T) over South America are analysed using the FORMOSAT-3/COSMIC mission data (August 2006–December 2013). The Global Positioning System radio occultation (GPS RO) technique provides high vertical resolution profiles of atmospheric properties (refractivity, density, temperature and water vapour pressure) with a global coverage under any weather condition. During the ENSO warm phase (or El Niño), positive PW anomalies are found over the equatorial Pacific Ocean, southeastern Brazil, Bolivia, Paraguay and northern Argentina. Negative anomalies are found in the northern part of South America, but covering a smaller area. During the ENSO cold phase (or La Niña), positive anomalies are found in the northern part of the continent whereas negative anomalies are found over the Amazon Basin region. A Morlet continuous wavelet transform analysis is applied to deseasonalized PW anomaly time series. Over the areas showing PW anomalies related to ENSO, main modes of oscillation between 35 and 38 months are found, similar to the main oscillation mode of the Oceanic Niño index. Consistent with previous studies, PW anomalies in almost all these areas show a general behaviour towards opposite signals during the opposite ENSO phases. q patterns show a linear (in phase with Oceanic Niño Index) response to ENSO along the equator below 8 km height. The Andes mountains separate positive (west) from negative (east) anomalies during El Niño (EN) events (reversing during LN). The higher q positive anomalies are found over the equatorial Pacific Ocean and over 60°–50°W, 35°–20°S during EN months. T patterns show positive anomalies in the whole tropical troposphere during EN months, with higher values over the equatorial Pacific, west of the Andes between 7 and 15 km height. © 2016 Royal Meteorological Society Fil:Hierro, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08998418_v37_n1_p268_Llamedo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	ENSO FORMOSAT-3/COSMIC precipitable water South America Atmospheric humidity Atmospheric pressure Atmospheric temperature Global positioning system Nickel Oceanography Time series analysis Wavelet transforms Continuous Wavelet Transform ENSO Equatorial Pacific Ocean FORMOSAT-3/COSMIC High vertical resolution Precipitable water Precipitable water content South America Climatology air temperature atmospheric moisture COSMIC El Nino-Southern Oscillation FORMOSAT GPS precipitable water temperature anomaly South America
spellingShingle	ENSO FORMOSAT-3/COSMIC precipitable water South America Atmospheric humidity Atmospheric pressure Atmospheric temperature Global positioning system Nickel Oceanography Time series analysis Wavelet transforms Continuous Wavelet Transform ENSO Equatorial Pacific Ocean FORMOSAT-3/COSMIC High vertical resolution Precipitable water Precipitable water content South America Climatology air temperature atmospheric moisture COSMIC El Nino-Southern Oscillation FORMOSAT GPS precipitable water temperature anomaly South America Llamedo, P. Hierro, R. de la Torre, A. Alexander, P. ENSO-related moisture and temperature anomalies over South America derived from GPS radio occultation profiles
topic_facet	ENSO FORMOSAT-3/COSMIC precipitable water South America Atmospheric humidity Atmospheric pressure Atmospheric temperature Global positioning system Nickel Oceanography Time series analysis Wavelet transforms Continuous Wavelet Transform ENSO Equatorial Pacific Ocean FORMOSAT-3/COSMIC High vertical resolution Precipitable water Precipitable water content South America Climatology air temperature atmospheric moisture COSMIC El Nino-Southern Oscillation FORMOSAT GPS precipitable water temperature anomaly South America
description	El Niño Southern Oscillation- (ENSO) related anomaly patterns of monthly specific humidity (q), precipitable water content (PW) and temperature (T) over South America are analysed using the FORMOSAT-3/COSMIC mission data (August 2006–December 2013). The Global Positioning System radio occultation (GPS RO) technique provides high vertical resolution profiles of atmospheric properties (refractivity, density, temperature and water vapour pressure) with a global coverage under any weather condition. During the ENSO warm phase (or El Niño), positive PW anomalies are found over the equatorial Pacific Ocean, southeastern Brazil, Bolivia, Paraguay and northern Argentina. Negative anomalies are found in the northern part of South America, but covering a smaller area. During the ENSO cold phase (or La Niña), positive anomalies are found in the northern part of the continent whereas negative anomalies are found over the Amazon Basin region. A Morlet continuous wavelet transform analysis is applied to deseasonalized PW anomaly time series. Over the areas showing PW anomalies related to ENSO, main modes of oscillation between 35 and 38 months are found, similar to the main oscillation mode of the Oceanic Niño index. Consistent with previous studies, PW anomalies in almost all these areas show a general behaviour towards opposite signals during the opposite ENSO phases. q patterns show a linear (in phase with Oceanic Niño Index) response to ENSO along the equator below 8 km height. The Andes mountains separate positive (west) from negative (east) anomalies during El Niño (EN) events (reversing during LN). The higher q positive anomalies are found over the equatorial Pacific Ocean and over 60°–50°W, 35°–20°S during EN months. T patterns show positive anomalies in the whole tropical troposphere during EN months, with higher values over the equatorial Pacific, west of the Andes between 7 and 15 km height. © 2016 Royal Meteorological Society
format	JOUR
author	Llamedo, P. Hierro, R. de la Torre, A. Alexander, P.
author_facet	Llamedo, P. Hierro, R. de la Torre, A. Alexander, P.
author_sort	Llamedo, P.
title	ENSO-related moisture and temperature anomalies over South America derived from GPS radio occultation profiles
title_short	ENSO-related moisture and temperature anomalies over South America derived from GPS radio occultation profiles
title_full	ENSO-related moisture and temperature anomalies over South America derived from GPS radio occultation profiles
title_fullStr	ENSO-related moisture and temperature anomalies over South America derived from GPS radio occultation profiles
title_full_unstemmed	ENSO-related moisture and temperature anomalies over South America derived from GPS radio occultation profiles
title_sort	enso-related moisture and temperature anomalies over south america derived from gps radio occultation profiles
url	http://hdl.handle.net/20.500.12110/paper_08998418_v37_n1_p268_Llamedo
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_version_	1807314902262480896

ENSO-related moisture and temperature anomalies over South America derived from GPS radio occultation profiles

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