Radiative behavior and canopy light extinction coefficient in a savanna urban area

Authors

DOI:

https://doi.org/10.5902/2179460X34031

Keywords:

Leaf area index, Photosynthetically active radiation, Canopy geometry

Abstract

The knowledge of the radiative characteristics of an area is essential to understanding the flows of matter and energy. The value of the Light Extinction Coefficient (K) is a parameter that describes the efficiency of the interception of light in a given canopy, being required, as input, for several SWAP (Soil-Water-Atmosphere-Plant) models, which allow the characterization of the interactive properties among  soil, plant and atmosphere concerning these exchanges of matter and energy. This study aimed to obtain the light extinction coefficient (K) for a savanna fragment located in the urban area of Cuiabá. The used data correspond to one measurement each month, totaling twelve measurements in 30 points during the period from October 2014 to September 2015. The measured variables  were the LAI (Leaf Area Index), the photosynthetically active incident radiation (PARinc) and the transmitted radiation  (PARtrans), and the calculated ones were the zenith angle (Zh) and the extinction coefficient (K). Was observed an annual variability for the light extinction coefficient between 0.49 and 0.69. There are seasonal changes that interfere with the canopy geometry and the position of the study area in relation to the solar radiation incidence, concluding that the K variability is predominantly temporal.

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Author Biographies

Levi Pires de Andrade, Instituto Federal de Mato Grosso, Cuiabá, MT

Professor do Ensino Básico, Técnico e Tecnológico do Instituto Federal de Mato Grosso (IFMT) e Professor Colaborador do Colégio Issac Newton em Cuiabá/MT. Possui Graduação em Engenharia Elétrica (1983) e Especialização em Metodologia do Ensino Técnico (1989) ambos pela Universidade Federal de Mato Grosso.

Jonathan Willian Zangeski Novais, Universidade de Cuiabá, Cuiabá, MT

Doutor em Física Ambiental pelo Programa de Pós-Graduação em Física Ambiental da UFMT, professor pesquisador do mestrado em Ciências Ambientais da Universidade de Cuiabá-UNIC. Mestre em Física Ambiental pelo Programa de Pós-Graduação em Física Ambiental da UFMT. Graduado em Licenciatura Plena em Física pela Universidade Federal do Mato Grosso-UFMT.

Marta Cristina de Jesus Albuquerque Nogueira, Instituto Federal de Mato Grosso, Cuiabá, MT

Graduada em Engenharia Civil pela Universidade Federal de Mato Grosso (1988), Mestrado em Arquitetura e Urbanismo na área de Tecnologia do Ambiente Construído pela Escola de Engenharia de São Carlos/ USP (1991) e Doutorado em Engenharia Civil pela Escola de Engenharia de São Carlos/ USP (1996). Atualmente sou Professora Titular (2014) do Departamento de Arquitetura e Urbanismo/ FAET/ UFMT. Diretora da Faculdade de Arquitetura, Engenharia e Tecnologia/ FAET/ UFMT (2005-2009)

Luciana Sanches, Instituto Federal de Mato Grosso, Cuiabá, MT

Possui Graduação em Engenharia Sanitária pela Universidade Federal de Mato Grosso (1996), e em Engenharia de Segurança do Trabalho (2018), Mestrado em Saneamento, Meio Ambiente e Recursos Hìdricos pela Universidade Federal de Minas Gerais (1998), Doutorado em Engenharia de Estradas, Canais Hidráulicos e Portos - Universidad de Cantabria, España (2002) revalidado pela UFSC, Pós-doutorado em Física Ambiental (2002-2007), Pós-doutorado em Ciências Ambientais pela University of Reading, Reino Unido (2014). Atualmente é professora associada da Universidade Federal de Mato Grosso, lotada no Departamento de Engenharia Sanitária.

José de Souza Nogueira, Instituto Federal de Mato Grosso, Cuiabá, MT

Graduado em Física pela Universidade Federal de Mato Grosso (1980), Mestrado em Física Aplicada pela Universidade de São Paulo (1991) e Doutorado em Ciências pela Universidade de São Paulo (1995). Professor Titular da Universidade Federal de Mato Grosso, Bolsista Produtividade CNPq - nível 1A.

Carlo Ralph de Musis, Universidade de Cuiabá, Cuiabá, MT

Sou doutor em Educação pela Pontifícia Universidade Católica de São Paulo, mestre em Agricultura Tropical e engenheiro civil pela Universidade Federal de Mato Grosso. Atuo como orientador de mestrado e doutorado nos Programas de Estudos Pós-Graduados em Física Ambiental da Universidade Federal de Mato Grosso, e em Ciências Ambientais na Universidade de Cuiabá.

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Published

2020-01-15

How to Cite

Andrade, L. P. de, Novais, J. W. Z., Nogueira, M. C. de J. A., Sanches, L., Nogueira, J. de S., & Musis, C. R. de. (2020). Radiative behavior and canopy light extinction coefficient in a savanna urban area. Ciência E Natura, 42, e18. https://doi.org/10.5902/2179460X34031

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Vol. 42 (2020): 40 YEARS - Anniversary Edition

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Environment

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