Determination of the effective emissivity and temperature under vertical observation of a citrus orchard. Application to frost nowcasting

Caselles, V.; Sobrino, J. A.; Becker, F.

doi:10.1080/01431168808954888

Cited by 26 publications

(5 citation statements)

References 8 publications

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“…He introduced effective parameters of emissivity and temperature to simplify the mathematical development. Becker's model was validated by Caselles et al (1988) in an orange grove under vertical observation and a precision of 1% was obtained. Caselles and Sobrino (1989) give a more practical definition of the effective temperature than that proposed by Becker, which was used for determining orange tree temperatures from NOAA-AVHRR data.…”

Section: Geometrical Effectsmentioning

confidence: 99%

Thermal remote sensing of land surface temperature from satellites: Current status and future prospects

Prata

Caselles

Coll

et al. 1995

Remote Sensing Reviews

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251

119

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Section: Geometrical Effectsmentioning

confidence: 99%

Thermal remote sensing of land surface temperature from satellites: Current status and future prospects

Prata

Caselles

Coll

et al. 1995

Remote Sensing Reviews

Self Cite

251

119

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“…where £=(£1 +£2)/2 (2) Land surfaces are usually inhomogeneous (Becker and Raffy 1987) and a large range of LSTs can exist within a pixel, which makes the definition of effective surface temperatures and emissivities (Caselles et al 1988) difficult.…”

Section: ) Multi-angle Methodsmentioning

confidence: 99%

Towards a local split window method over land surfaces

Becker

1990

International Journal of Remote Sensing

735

332

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“…Essas temperaturas são estimadas segundo a Lei de Planck que estabelece que quanto maior a temperatura de um dado comprimento de onda, maior a quantidade de energia emitida por um corpo negro (blackbody) (BAPTISTA, 2003;DASH et al, 2002;WENG e YANG, 2004b;PRATA et al, 1995;BIAS et al, 2003). A temperatura quantificada pelo satélite é a temperatura radiante da superficie que é um valor superior à temperatura do ar A determinação da LST é um interesse que data de muito tempo e atinge diversas áreas de conhecimento como, por exemplo, processos termais que ocorrem no oceano (SCHLUESSEL et al, 1990;BARTON, 1995;OLIVEIRA, 2001), determinação de locais de pesca (ABDON, 1982), estimativa da umidade do solo (EPIPHANIO, 1982; , 1977;BECKER, 1981;MALARET et al, 1985;CASELLES et. al., 1988;SOBRINO e CASELLES, 1990).…”

Section: Infravermelho Termalunclassified

Influência do uso e cobertura do solo no clima de Piracicaba, São Paulo: análise de séries históricas, ilhas de calor e técnicas de sensoriamento remoto

Coltri¹

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A Roberta Valente e ao estagiário Saulo pela ajuda inicial com o IDRISI;Aos grandes amigos do INPE Daniela França, Pablo Santos, Sâmia Garcia, pela ajuda nos programas, nas imagens, e, principalmente pela amizade;Aos amigos da fitotecnia Thomas Martin, Roberta Uzzo e Eltiza Rondino Aos grandes amigos Henrique Barbin e Giulina Del Nero Velasco pelos "artiguinhos", ajuda e dedicação;As grandes "irmãs" da República "Dojão", Mariana (Relpi), Paula (Foker), Giuliana (Tafassiu), Maria Luiza (Di-Luvio), Estela (Porviña) e Maria Tereza (Maetê) pela paciência e amizade;As moradoras e ex-moradoras da República "Gaiola das Lokas" pelos anos de formação na ESALQ;Aos amigos Rafael Fonseca, Raphael Moura e Gustavo Nakagima pela ajuda;Aos companheiros do Ano Leitinho da ESALQ/USP (Formandos 2002);A minha família, em especial minha mãe (Maria Inês), meu pai (Cláudio) e a duplinha dinâmicaminha irmã (Patrícia "erma") e meu cunhado Paulo (Miúdo) -pelas revisões, pelo apoio, paciência, dedicação e, acima de tudo, inspiração.Ao Thales pelo carinho, compreensão, apoio e dedicação;As amigas Daniela Roncato (Arroto), Carina Mendes (Voazã), Gisele Nunes (Gi), Thais Emídio (Tá) e Lais Marques (Lala) pela amizade, paciência e compreensão;Aos todos aqueles que de uma forma ou de outra ajudaram para a realização desse trabalho.ABSTRACT Global, regional and local climate changes represent one of the greatest concerns of humanity. Climate changes can occur through natural or anthropogenic causes. Urban areas usually present higher temperatures than rural areas. This thermal effect is called "heat-island phenomenon" and has great importance on urban climate studies. In the present work, we identified and analyzed the heat-islands from Piracicaba, São Paulo using remote sensing techniques. The heat-islands were analyzed according to its seasonality, intensity and morphology using images from Landsat 7 satellite. We performed analysis on regional climate changes and investigated the use of the IDRISI thermal algorithm to convert Landsat 7 infrared thermal data on land surface temperature (LST). In order to transform Landsat 7 infrared thermal data we used two mathematical methods. Climate changes were analyzed by monitoring the climate elements for long periods of time, enabling the visualization of directional or periodical regional changes. The main climate elements were studied using data from ESALQ meteorological station for the last 55 years . Temperature, relative humidity, evaporation and precipitation variation were found to be correlated with urban growth parameters. The results indicated that temperature, precipitation, relative humidity and evaporation increased during the studied period and have been classified as "climate trends". The temperature presented the more accentuated trend of increase and was positively correlated with the growing urbanization. The software IDRISI 3.2 can be used with Landsat 7 high resolution images, being a useful and rapid tool to study urban heat islands. The most intense summer heatislands were repres...

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Determination of the effective emissivity and temperature under vertical observation of a citrus orchard. Application to frost nowcasting

Cited by 26 publications

References 8 publications

Thermal remote sensing of land surface temperature from satellites: Current status and future prospects

Thermal remote sensing of land surface temperature from satellites: Current status and future prospects

Towards a local split window method over land surfaces

Influência do uso e cobertura do solo no clima de Piracicaba, São Paulo: análise de séries históricas, ilhas de calor e técnicas de sensoriamento remoto

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