Voltar
Artigo Produção Nacional Revisado por pares
BIBTEX RIS

Can changes in land use in a semi-arid region of Brazil cause seasonal variation in energy partitioning and evapotranspiration?

2024; Elsevier BV; Volume: 367; Linguagem: Inglês

10.1016/j.jenvman.2024.121959

ISSN

1095-8630

Autores

Wilma Roberta dos Santos, Alexandre Maniçoba da Rosa Ferraz Jardim, Luciana Sandra Bastos de Souza, Carlos André Alves de Souza, José Edson Florentino de Morais, Cléber Pereira Alves, George do Nascimento Araújo Júnior, Marcelo José da Silva, Kaique Renan da Silva Salvador, Marcos Vinícius da Silva, Leonor Patrícia Cerdeira Morellato, Thieres George Freire da Silva,

Tópico(s)

Solar Radiation and Photovoltaics

Resumo

Changes to forests due to deforestation, or their replacement by agricultural areas, alter evapotranspiration and the partitioning of available energy. This study investigated seasonal variations in the energy balance and evapotranspiration in landscapes under different levels of anthropogenic intervention in the semi-arid region of Brazil. Micrometeorological data was obtained from September 2020 to October 2022 for three areas of the semi-arid region: preserved Caatinga (CAA, native vegetation), Caatinga under regeneration (REGE) and a deforested area (DEFA). Here, we use the Bowen ratio energy balance method. Measurements were taken of global solar radiation, air temperature, relative humidity, vapour pressure deficit, rainfall, net radiation, latent heat flux, sensible heat flux, soil heat flux, evapotranspiration, volumetric soil water content and Normalised Difference Vegetation Index. Sensible heat flux was the dominant flux in both areas with 66% for preserved Caatinga vegetation, 63% for Caatinga under regeneration and 62% deforested area. The latent heat flux was equivalent to 28% of the net radiation for preserved Caatinga vegetation, Caatinga under regeneration and deforested area. The evapotranspiration in turn responded as a function of water availability, being higher during the rainy seasons, with average values of 1.82 mm day

Referência(s)