Análise do albedo da superfície e índices de vegetação por sensoriamento remoto na bacia hidrográfica do rio Pacoti/CE

Júnior, José Jeová Ferreira; Dantas, Maria Jorgiana Ferreira

doi:10.5020/23180730.2018.8132

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…The highest mean albedo value for the Pasture, even with greater rainfall, was confirmed by the statistically significant difference between the means in the two experimental sites (according to Table 1), within a confidence level of 95%. A higher albedo value for Pasture was expected and is in line with what has been pointed out by other research [24,37,53,54,56,57]. This is because the pasture has characteristics of sparse vegetation cover with more spaced and drier plants and more exposed soil, factors that contribute to the elevation of albedo values.…”

Section: Albedo Time Seriessupporting

confidence: 89%

“…However, the interest of the scientific community in understanding albedo goes beyond its value as a possible indicator of change in land use, level of degradation, or occupation [18][19][20][21][22][23][24][25][26]. A better understanding of albedo, especially in agricultural areas, would allow it to be used as a possible strategy to mitigate the effects of climate change through solar radiation management (SRM).…”

Section: Introductionmentioning

confidence: 99%

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Caatinga Albedo Preserved and Replaced by Pasture in Northeast Brazil

2021

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The caatinga is considered South America’s largest seasonally dry tropical forest (SDTF) and one of the most vulnerable endemic biomes in relation to climate change. The surface albedo in caatinga is relevant to understanding the role of this biome in the climate of the Northeast region of Brazil. Thus, a comparative analysis was conducted between the albedos of preserved and anthropized caatinga (pasture). Data were collected using CNR4-type net radiometers during the dry and rainy seasons. The mean albedo values were higher in the Pasture both in the dry and rainy season, with values of 0.181 and 0.177, respectively. In the caatinga, the mean albedo values were 0.137 in the dry season and 0.146 in the rainy season. The hourly average values for albedo, taken between 6:30 a.m. and 4 p.m., with intervals of 30 min, were also higher in the pasture. For convenience, this study uses local standard time (LST), which is 3 h behind from coordinated universal time (UTC). The greatest dispersions in the frequencies of the mean hourly albedo values occurred in the early morning and late afternoon. Some of the consequences of this study is the confirmation that there is an increase in albedo in caatinga replaced by pasture and this causes a reduction in the net radiation and also the finding that a region where there is adequate pasture management also enables albedo management and from solar radiation. And that further studies can indicate the impacts on temperature and precipitation, especially in warmer periods during the dry season.

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Section: Albedo Time Seriessupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Caatinga Albedo Preserved and Replaced by Pasture in Northeast Brazil

2021

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Identificação de Áreas de Campos de Altitude do Perímetro Urbano de Poços de Caldas/MG pelo Sensoriamento Remoto e sua Contraposição ao Plano Diretor de 2022.

Silva,

Botezelli

2024

Rev. Bras. Geog. Fis.

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Pertencente ao bioma Mata Atlântica a fitofisionomia Campos de Altitude é pouco estudada. No entanto, possui grande biodiversidade e espécies ameaçadas de extinção, além de ser fornecedora de diversos serviços ecossistêmicos. Os Campos de Altitude estão presentes no perímetro urbano de Poços de Caldas e são ameaçados por diversas atividades antrópicas como a urbanização e a invasão por gramíneas exóticas. Deste modo, decidiu-se averiguar a proteção desta fitofisionomia pelo macrozoneamento apresentado na revisão do Plano Diretor Municipal, em 2022. Isto foi realizado confrontando as zonas de proteção ambiental com as áreas de Campos de Altitude identificadas a partir da classificação supervisionada de imagens, importante técnica de geoprocessamento para identificação do uso e ocupação do solo. Verificou-se que apenas 4,98% dos Campos de Altitude são de fato protegidos pelo macrozoneamento urbano, o que indica permissividade na elaboração do Plano Diretor vigente e deste modo, são colocadas em risco a existência de diversas áreas desta fitofisionomia. Diante deste panorama, sugere-se incrementos na pesquisa técnico-científica, educação ambiental e a instituição de Unidades de Conservação como medidas contribuintes para a proteção dos Campos de Altitude.

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Análise do albedo da superfície e índices de vegetação por sensoriamento remoto na bacia hidrográfica do rio Pacoti/CE

Abstract: Análise do albedo da superfície e de índices de vegetação por sensoriamento remoto na bacia hidrográfica do Rio Pacoti/CE

Cited by 2 publications

References 5 publications

Caatinga Albedo Preserved and Replaced by Pasture in Northeast Brazil

Caatinga Albedo Preserved and Replaced by Pasture in Northeast Brazil

Identificação de Áreas de Campos de Altitude do Perímetro Urbano de Poços de Caldas/MG pelo Sensoriamento Remoto e sua Contraposição ao Plano Diretor de 2022.

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