Publicação
Capture of carbon dioxide by the Caatinga, in semiarid regions of northeast Brasil
| Resumo: | Vegetation is largely responsible for the absorption of carbon dioxide (CO2) from the planet, which is used in the process of photosynthesis. One of the variables used to quantify the CO2 that an ecosystem absorbs is gGross pPrimary pProductivity (GPP), which is estimated through remote sensing and/or data measured in micrometeorological towers. In this study, the capture of CO2 absorbed by the caatinga vegetation was quantified and analyszed for two microregions of the semiarid region of Paraíba, Brazil (Campina Grande, A1, and Sumé, A2), using remote data from the MODIS/Terra sensor and a micrometeorological tower from 2013 to 2017. GPP was estimated using the Monteith method (1972) and the MOD17A2H product, as well asand also obtained by the turbulent eddies correlation method with measurements from taken at the micrometeorological tower installed in the A1 area of preserved Caatinga. The results showed that the relationship between GPPec (gross primary productivity measured by the Eddy covariance method) and GPPest (gross primary productivity) presented was r=0.79 and between GPPec and GPPMod (gross primary productivity estimated by the MOD17A2H product) was r=0.66 for α=0.05 respectively. It is also worth noting that the parameter that most influenced GPP was precipitation, since in unfavourable climatic conditions, the caatinga captures low amounts of CO2, that is, providing it supplies more CO2 to the atmosphere, indicating the importance of its conservation. |
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| Autores principais: | Braga, Célia Campos |
| Outros Autores: | Silva de Lima, Karlla Karem; Silva, Madson Tavares; de Andrade, Antônia Silnia |
| Assunto: | Produtividade primária bruta dióxido de carbono sensoriamento remoto Gross primary productivity carbon dioxide remote sensing |
| Ano: | 2025 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | unknown |
| Instituição associada: | Imprensa da Universidade de Coimbra |
| Idioma: | português |
| Origem: | Territorium |
| Resumo: | Vegetation is largely responsible for the absorption of carbon dioxide (CO2) from the planet, which is used in the process of photosynthesis. One of the variables used to quantify the CO2 that an ecosystem absorbs is gGross pPrimary pProductivity (GPP), which is estimated through remote sensing and/or data measured in micrometeorological towers. In this study, the capture of CO2 absorbed by the caatinga vegetation was quantified and analyszed for two microregions of the semiarid region of Paraíba, Brazil (Campina Grande, A1, and Sumé, A2), using remote data from the MODIS/Terra sensor and a micrometeorological tower from 2013 to 2017. GPP was estimated using the Monteith method (1972) and the MOD17A2H product, as well asand also obtained by the turbulent eddies correlation method with measurements from taken at the micrometeorological tower installed in the A1 area of preserved Caatinga. The results showed that the relationship between GPPec (gross primary productivity measured by the Eddy covariance method) and GPPest (gross primary productivity) presented was r=0.79 and between GPPec and GPPMod (gross primary productivity estimated by the MOD17A2H product) was r=0.66 for α=0.05 respectively. It is also worth noting that the parameter that most influenced GPP was precipitation, since in unfavourable climatic conditions, the caatinga captures low amounts of CO2, that is, providing it supplies more CO2 to the atmosphere, indicating the importance of its conservation. |
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