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Previous issue date: 2015-06-03 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / No presente trabalho, utilizaram-se dados do Experimento Cariri coletados em regi?o de caatinga nativa no munic?pio de S?o Jo?o do Cariri estado da Para?ba nas coordenadas de 7?22'45,1"S e 36?31'47,2"Wcom altitude de 458 m. As medidasmicroclim?ticas foram realizadas em duas ?pocas, nos per?odo de 01 a 13 de janeiro de 2002 (Per?odo Chuvoso) e 07 a 19 de setembro de 2002 (Per?odo Seco). O objetivo deste trabalho foi realizar a caracteriza??o microclim?tica e comportamento do fluxo de calor sens?vel armazenado no dossel vegetativo.O estudo microclim?tico envolveu a medi??o das seguintes vari?veis meteorol?gicas: precipita??o;saldo de radia??o; radia??o solar global; temperatura do ar no dossel vegetativo e fora do dossel vegetativo; fluxo de calor no solo vegetado e n?o vegetado e umidade relativa do ar. Foram comparadas as m?dias durante o per?odo experimental por meio da an?lise de vari?ncia e estat?stica descritiva.Os resultados referentes ?s vari?veis estudadas durante o per?odo experimental e submetidos ? an?lise estat?stica revelaram efeitos significativos a 1% pelo teste F. O saldo de radia??o m?dio foi superior durante o per?odo seco quando comparado ao per?odo chuvoso, com m?dias 163,20 Wm-2 e 44,26 Wm-2, respectivamente. No per?odo noturno o saldo de radia??o foi negativo enquanto que durante o dia foi positivo. A radia??o solar global durante o per?odo chuvoso foi menor do que no per?odo seco, com m?dias de 208,27 Wm-2 e 265,49 Wm-2, respectivamente. As temperaturas do ar dentro do dossel vegetativo foram maiores que a temperatura do ar fora do dossel vegetativo em ambos os per?odos estudados. O fluxo m?dio de calor no solo foi superior no solo n?o vegetado quando comparado ao solo vegetado, com m?dias no per?odo chuvoso de 26,79 Wm-2 e 6,52 Wm-2, respectivamente em ambos os per?odos estudados. Para o per?odo seco o fluxo de calor m?dio foi de 30,50 Wm-2 solo n?o vegetado e 3,88 Wm-2no solo vegetado. A umidade relativa do ar no per?odo chuvoso foi maior do que no per?odo seco com m?dias de 79,60% e 62,73%, respectivamente. O fluxo de calor sens?vel armazenado no dossel vegetativo n?o revelou efeito significativo a 5% entre o per?odo seco e chuvoso, com m?dia de -0,011 Wm-2 no per?odo chuvoso e -0,017 Wm-2 no per?odo seco. / In this study, we used the data of Cariri Experiment collected in native caatinga region in the municipality of S?o Jo?o do Cariri, Para?ba state, in the coordinates of 7?22'45.1 "S and 36?31'47.2" Wwith altitude of 458 m. Microclimate measurements were taken at two stages in the period from 01 to 13 January 2002 (rainy period) and 07 to 19 September 2002 (dry Period). The objective of this work was the microclimate characterization and behavior of the sensible heat flux stored in the canopy. The microclimate study involved the measurement of the following meteorological variables: precipitation; radiation; solar radiation; air temperature in the canopy and out of the canopy; heat flow in non-vegetated and vegetated soil and air relative humidity. We compared the average during the experimental period by analysis of variance and descriptive statistics. The results for the variables studied during the experimental period and submitted to statistical analyzes revealed significant effect from 1% by F test. The average net radiation was higher during the dry season when compared to the rainy season with average of 163.20 Wm-2 and 44.26 Wm-2, respectively. At night the net radiation was negative while during the day was positive. The global solar radiation during the rainy season was lower than in the dry season with an average of 208.27 Wm-2 and 265.49 Wm-2, respectively. At nighttime the net radiation was negative while during the day was positive. The air temperature inside of the canopy are higher than the temperature of the air outside the canopy in both periods. The heat flow in the medium soil was higher in non-vegetated soil when compared to vegetated soil in the rainy season with an average of 26.79 Wm-2 and 6.52 Wm-2, respectively in both periods studied. For the dry period showed average of 30.50 Wm-2 to non-vegetated soil 3.88 Wm-2 to vegetated soil. The relative humidity in the rainy season was higher than in the dry season with averages of 79.60% and 62.73%, respectively. The sensible heat flux stored in the canopy revealed no significant effect of 5% between the dry and rainy season by F test, with an average of -0.011 Wm-2 in the rainy season and -0.017 Wm-2 in the dry season.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/22164 |
| Date | 03 June 2015 |
| Creators | Andrade, R?nio Leite de |
| Contributors | 20610700430, Mattos, Arthur, 07431937849, Marinho, George Santos, 35846852491, Santos, Marcos Aurelio Ferreira dos, 31403727449, Silva, M?rcia Regina Farias da, 81259980472, Silva, Fernando Moreira da |
| 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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