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Análise da temperatura de superfície terrestre em áreas de pastagens com diferentes sistemas de produção e tipos de manejo : Analysis of land surface temperature in pasture areas with different production systems and types of management
| Content Provider | Semantic Scholar |
|---|---|
| Author | Santos, Roberto Lorena De Barros |
| Copyright Year | 2018 |
| Abstract | Monitoring the impacts of human activities on land uses and occupations through remote sensing has been evolving over the last few years. However, there is the need of use new biophysical parameters to identify and measure such impacts. In Brazil and in the world, pastureland areas have undergone many transformations, where on the one hand it has been suffering from degradation and desertification, and on the other hand it has been intensifying through the improvement of management and use of new technologies. Among the impacts caused by the different systems of pasture production and management it can be highlighted the changes in terrestrial surface temperature (TST). In this context, the objective of this study was to analyze the effects of TST in pasture areas with different systems of production and agricultural management. The study areas were nine farms located in Presidente Prudente mesoregion (São Paulo state, Brasil). In these areas we found different situations such as: degraded pastures, non-degraded pastures and pastures integrated with annual crops and forestry. These areas were identified and classified using of the Normalize Difference Vegetation Index (NDVI) and survey with farmers about their respective historical management. To compute the surface temperature, 54 images of band 10 of the Landsat 8 satellite were used. The NDVI values were obtained through the SATVeg platform (EMBRAPA). And the Net Primary Productivity NPP values were obtained through the parametric model proposed by Kumar and Moteith (1981). The results showed that: (1) The techniques used in this work contributed to elaborate the management history and classify the state of health of pasture ecosystems; (2) The TST values found in the different pasture plot samples were representative; (3) The trend curves of the temporal profiles of TST presented an inverse behavior in relationship to the trend curves of the NDVI and NPP, however these variables presented different intensities of correlation in relationship to the studied samples; (4) TST maps generated in the winter season for four years studied presented well defined "heat islands". |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.repositorio.unicamp.br/bitstream/REPOSIP/333267/1/Santos_RobertoDeBarros_M.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
