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Previous issue date: 2015-06-02 / O objetivo desta tese foi estudar experimentalmente o comportamento termodin?mico da Camada Limite Convectiva (CLC) durante o per?odo seco e chuvoso em uma regi?o de clima semi?rido do nordeste brasileiro (NEB), com o uso de radiossondas nos dias 16, 17 e 18 de novembro de 2013 (per?odo seco) e de 03 a 08 de abril de 2014 (per?odo chuvoso) no munic?pio de Apodi-RN e no chuvoso de 09 a 17 de abril de 2011 nos munic?pios de Mossor?-RN e Quixeramobim-CE. Foram lan?ados 15 bal?es (per?odo seco) e 32 em Apodi-RN e 35 em Mossor?-RN e 36 em Quixeramobim-CE (ambos no per?odo chuvoso). Atrav?s das radiossondagens foram coletados dados do perfil de press?o atmosf?rica, temperatura do ar, umidade relativa do ar, velocidade, dire??o do vento e Jatos de Baixos N?veis. Para os dados de superf?cie em Apodi-RN, utilizou-se uma esta??o meteorol?gica port?til de superf?cie e foram calculadas as m?dias, m?ximos e m?nimos a cada 10 minutos durante 24 horas. Foi aplicado o teste T-Student e se constatou que algumas vari?veis meteorol?gicas apresentaram diferen?as estat?sticas significantes ao n?vel de 5%. Para determinar a altura da CLC aplicou-se o m?todo dos perfis utilizando-se a temperatura potencial e foram analisadas tr?s informa??es de cada perfil: a m?dia da camada, o valor na base e no topo. Em Apodi-RN, a altura da CLC foi maior no per?odo seco que no per?odo chuvoso, sendo mais baixa no in?cio da manh? (05:00 HL - Hora Local) e mais alta no final da tarde ?s 17:00 HL. A temperatura potencial foi ligeiramente superior no per?odo seco que no chuvoso atingindo valores m?ximos ?s 17:00 HL. Em Mossor?-RN e Quixeramobim-CE, a altura da CLC no per?odo chuvoso foi mais rasa, mais fria e mais ?mida em ambos os s?tios. O teste T-Student foi aplicado tanto para avaliar a diferen?a estat?stica entre os dados por per?odo quanto por localidade. Os resultados s?o apresentados no Cap?tulo 4. / The Objective of this thesis was to study experimentally the thermodynamic behavior of the Convective Boundary Layer (CBL) during the dry and rainy period in a semi-arid climate region of the Northeast of Brazil (NEB), with the use of radiosondes on days 16, 17 and 18 November 2013 (dry period) and from 03 to 08 April 2014 (rainy period) in the municipality of Apodi-RN and in the rainy period of 09 to 17 April 2011 in the municipalities of Mossor?-RN and Quixeramobim-CE. They were launched 15 balloons (dry period) and 32 in Apodi-RN and 35 in Mossor?-RN and 36 in Quixeramobim-CE (both in the rainy period). Through radiosondings were collected profile data of atmospheric pressure, air temperature, relative humidity, wind speed and direction and Low Level Jets. For surface data in Apodi-RN was used a portable surface weather station to collect data and were calculated the average, maximum and minimum every 10 minutes during 24 hours. It was applied the T-Student test and was found that some weather variables showed statistically significant differences at 5%. To determine the CBL height was applied the profiles method using the potential temperature and it was analyzed three informations from each profile: the average of layer, the value in the base and top. In Apodi-RN, the CBL height was higher in the dry season than in the rainy period, being lowest in the early morning (5:00 HL - Local Time) and highest in the late afternoon 17:00 HL. The potential temperature was slightly higher in the dry season than the in the rainy reaching maximum values at 17:00 HL. In Mossor?-RN and Quixeramobim-CE, the CBL height during the rainy season was shallower, colder and wetter in both sites. The T-Student test was applied both to evaluate the statistical differences between the data by period and by location.The results were shown in the Chapter 4.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/22161 |
| Date | 02 June 2015 |
| Creators | Silva, Francisco Raimundo da |
| Contributors | 66961513204, Mattos, Arthur, 07431937849, Bezerra, Bergson Guedes, 99210703472, Fideles Filho, Jos?, 10876103468, Paz, R?mulo da Silveira, 18130798468, Leme, Neusa Maria Paes, Silva, Cl?udio Mois?s Santos e |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM CI?NCIAS CLIM?TICAS, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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