Bulletin of the American Meteorological Society, 2019
The ozonesonde is a small balloon-borne instrument that is attached to a standard radiosonde to m... more The ozonesonde is a small balloon-borne instrument that is attached to a standard radiosonde to measure profiles of ozone from the surface to 35 km with ∼100-m vertical resolution. Ozonesonde data constitute a mainstay of satellite calibration and are used for climatologies and analysis of trends, especially in the lower stratosphere where satellites are most uncertain. The electrochemical concentration cell (ECC) ozonesonde has been deployed at ∼100 stations worldwide since the 1960s, with changes over time in manufacture and procedures, including details of the cell chemical solution and data processing. As a consequence, there are biases among different stations and discontinuities in profile time series from individual site records. For 22 years the Jülich (Germany) Ozonesonde Intercomparison Experiment (JOSIE) has periodically tested ozonesondes in a simulation chamber designated the World Calibration Centre for Ozonesondes (WCCOS) by WMO. During October–November 2017 a JOSIE c...
The relation between thermodynamic instability indexes, precipitable water content, static energy... more The relation between thermodynamic instability indexes, precipitable water content, static energy flux, and rainfall annual cycle over Maxaranguape (coastland site, Rio Grande do Norte, Northeast of Brazil) was investigated. The radiosonde dataset covered the period from January 2002 to December 2009 within the South Hemisphere ADditional OZonesondes (SHADOZ) project. The thermodynamics indexes variability do not explain the maximum rainfall in July, however they are in phase with the secondary maximum in April. The annual cycle of the moist and saturated static energy fluxes showed that rainfall cycle is modulated by both thermodynamics and low level moisture convergence mechanisms.
As a consequence of the SHADOZ effort it is possible to examine Tropospheric Total Ozone TTO, ove... more As a consequence of the SHADOZ effort it is possible to examine Tropospheric Total Ozone TTO, over Ascension Island (8S,14W) and compare results with similar ozone soundings for the period July 1990 through October 1992. Because of the nearly 20-year long ...
ABSTRACT RESUMO Estudaram-se índices de instabilidade termodinâmica, conteúdo de água precipitáve... more ABSTRACT RESUMO Estudaram-se índices de instabilidade termodinâmica, conteúdo de água precipitável e fluxos de energia estática associados ao ciclo anual de precipitação sobre Maxaranguape, situada no litoral do Rio Grande do Norte. O período de coleta de dados através de radiossondagens foi de janeiro de 2002 a dezembro de 2009 no âmbito do projeto South Hemisphere ADditional OZonesondes (SHADOZ). Os índices termodinâmicos não explicam o máximo de precipitação observado em julho, porém apresentam-se em fase com um máximo secundário em abril. Os fluxos de energia estática úmida e saturada mostram que o ciclo anual da precipitação é modulado pelos mecanismos que geram instabilidade termodinâmica associados à convergência de umidade em baixos níveis. Palavras chave: convergência de umidade, SHADOZ, radiossondagem. ABSTRACT: ANNUAL RAINFALL CYCLE AS A FUNCTION OF THERMODYNAMIC INSTABILITY INDEXES, AND STATIC ENERGY FLUXES: ANALYSIS IN MAXARANGUAPE-RN The relation between thermodynamic instability indexes, precipitable water content, static energy flux, and rainfall annual cycle over Maxaranguape (coastland site, Rio Grande do Norte, Northeast of Brazil) was investigated. The radiosonde dataset covered the period from January 2002 to December 2009 within the South Hemisphere ADditional OZonesondes (SHADOZ) project. The thermodynamics indexes variability do not explain the maximum rainfall in July, however they are in phase with the secondary maximum in April. The annual cycle of the moist and saturated static energy fluxes showed that rainfall cycle is modulated by both thermodynamics and low level moisture convergence mechanisms.
The relation between thermodynamic instability indexes, precipitable water content, static energy... more The relation between thermodynamic instability indexes, precipitable water content, static energy flux, and rainfall annual cycle over Maxaranguape (coastland site, Rio Grande do Norte, Northeast of Brazil) was investigated. The radiosonde dataset covered the period from January 2002 to December 2009 within the South Hemisphere ADditional OZonesondes (SHADOZ) project. The thermodynamics indexes variability do not explain the maximum rainfall in July, however they are in phase with the secondary maximum in April. The annual cycle of the moist and saturated static energy fluxes showed that rainfall cycle is modulated by both thermodynamics and low level moisture convergence mechanisms.
Bulletin of the American Meteorological Society, 2019
The ozonesonde is a small balloon-borne instrument that is attached to a standard radiosonde to m... more The ozonesonde is a small balloon-borne instrument that is attached to a standard radiosonde to measure profiles of ozone from the surface to 35 km with ∼100-m vertical resolution. Ozonesonde data constitute a mainstay of satellite calibration and are used for climatologies and analysis of trends, especially in the lower stratosphere where satellites are most uncertain. The electrochemical concentration cell (ECC) ozonesonde has been deployed at ∼100 stations worldwide since the 1960s, with changes over time in manufacture and procedures, including details of the cell chemical solution and data processing. As a consequence, there are biases among different stations and discontinuities in profile time series from individual site records. For 22 years the Jülich (Germany) Ozonesonde Intercomparison Experiment (JOSIE) has periodically tested ozonesondes in a simulation chamber designated the World Calibration Centre for Ozonesondes (WCCOS) by WMO. During October–November 2017 a JOSIE c...
The relation between thermodynamic instability indexes, precipitable water content, static energy... more The relation between thermodynamic instability indexes, precipitable water content, static energy flux, and rainfall annual cycle over Maxaranguape (coastland site, Rio Grande do Norte, Northeast of Brazil) was investigated. The radiosonde dataset covered the period from January 2002 to December 2009 within the South Hemisphere ADditional OZonesondes (SHADOZ) project. The thermodynamics indexes variability do not explain the maximum rainfall in July, however they are in phase with the secondary maximum in April. The annual cycle of the moist and saturated static energy fluxes showed that rainfall cycle is modulated by both thermodynamics and low level moisture convergence mechanisms.
As a consequence of the SHADOZ effort it is possible to examine Tropospheric Total Ozone TTO, ove... more As a consequence of the SHADOZ effort it is possible to examine Tropospheric Total Ozone TTO, over Ascension Island (8S,14W) and compare results with similar ozone soundings for the period July 1990 through October 1992. Because of the nearly 20-year long ...
ABSTRACT RESUMO Estudaram-se índices de instabilidade termodinâmica, conteúdo de água precipitáve... more ABSTRACT RESUMO Estudaram-se índices de instabilidade termodinâmica, conteúdo de água precipitável e fluxos de energia estática associados ao ciclo anual de precipitação sobre Maxaranguape, situada no litoral do Rio Grande do Norte. O período de coleta de dados através de radiossondagens foi de janeiro de 2002 a dezembro de 2009 no âmbito do projeto South Hemisphere ADditional OZonesondes (SHADOZ). Os índices termodinâmicos não explicam o máximo de precipitação observado em julho, porém apresentam-se em fase com um máximo secundário em abril. Os fluxos de energia estática úmida e saturada mostram que o ciclo anual da precipitação é modulado pelos mecanismos que geram instabilidade termodinâmica associados à convergência de umidade em baixos níveis. Palavras chave: convergência de umidade, SHADOZ, radiossondagem. ABSTRACT: ANNUAL RAINFALL CYCLE AS A FUNCTION OF THERMODYNAMIC INSTABILITY INDEXES, AND STATIC ENERGY FLUXES: ANALYSIS IN MAXARANGUAPE-RN The relation between thermodynamic instability indexes, precipitable water content, static energy flux, and rainfall annual cycle over Maxaranguape (coastland site, Rio Grande do Norte, Northeast of Brazil) was investigated. The radiosonde dataset covered the period from January 2002 to December 2009 within the South Hemisphere ADditional OZonesondes (SHADOZ) project. The thermodynamics indexes variability do not explain the maximum rainfall in July, however they are in phase with the secondary maximum in April. The annual cycle of the moist and saturated static energy fluxes showed that rainfall cycle is modulated by both thermodynamics and low level moisture convergence mechanisms.
The relation between thermodynamic instability indexes, precipitable water content, static energy... more The relation between thermodynamic instability indexes, precipitable water content, static energy flux, and rainfall annual cycle over Maxaranguape (coastland site, Rio Grande do Norte, Northeast of Brazil) was investigated. The radiosonde dataset covered the period from January 2002 to December 2009 within the South Hemisphere ADditional OZonesondes (SHADOZ) project. The thermodynamics indexes variability do not explain the maximum rainfall in July, however they are in phase with the secondary maximum in April. The annual cycle of the moist and saturated static energy fluxes showed that rainfall cycle is modulated by both thermodynamics and low level moisture convergence mechanisms.
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