@InProceedings{SantosBaptMour:2017:SaÍnVe,
               author = "Santos, Cloves Vilas Boas dos and Baptista, Gustavo Macedo de 
                         Mello and Moura, Magna Soelma Beserra de",
                title = "Sazonalidade do {\'{\I}}ndice de Vegeta{\c{c}}{\~a}o por 
                         Diferen{\c{c}}a Normalizada (NDVI) a partir de dados do sensor 
                         OLI em {\'a}rea de Caatinga e Pastagem",
            booktitle = "Anais...",
                 year = "2017",
               editor = "Gherardi, Douglas Francisco Marcolino and Arag{\~a}o, Luiz 
                         Eduardo Oliveira e Cruz de",
                pages = "6679--6685",
         organization = "Simp{\'o}sio Brasileiro de Sensoriamento Remoto, 18. (SBSR)",
            publisher = "Instituto Nacional de Pesquisas Espaciais (INPE)",
              address = "S{\~a}o Jos{\'e} dos Campos",
             abstract = "Remote Sensing has been used in surveys with greater frequency to 
                         allow the analysis of the surface without the contact with the 
                         targets, allowing to identify biophysical conditions of the 
                         vegetation and understanding its photosynthetic dynamics. This 
                         study aimed to analyze the seasonal behavior of the Normalized 
                         Difference Vegetation Index (NDVI) in the Caatinga area. The study 
                         was carried out in an area with predominance of Caatinga and 
                         Pasture, in Petrolina-PE. We used 14 multispectral images of the 
                         OLI sensor representing rainy and dry periods between 2013 and 
                         2015. NDVI was determined using the red and infrared bands. 
                         Precipitation (P) was recorded through a micrometeorological 
                         station in order to understand the relationship between NDVI and 
                         the occurrence of rainfall in the region. The results showed 
                         seasonal variations throughout the studied period, with higher 
                         NDVI values in January / 2014 for the Caatinga area reaching 
                         0.628, and in June / 2014 for Pasture reaching 0.333. The lowest 
                         indexes occurred before the rainy season, with 0.313 in September 
                         / 2014 in the Caatinga and 0.128 in October / 2013 in the Pasture. 
                         The NDVI and P ratio in the studied areas showed similarity 
                         between May / 2013 and June / 2014, and January / 2015, differing 
                         in September / 2014 and between August and November / 2015, when 
                         the lowest precipitation values . This is justified by the 
                         reduction of the photosynthetic activity of the plants in this 
                         period, with the absence of water in the soil. Therefore, with the 
                         use of multispectral data it was possible to analyze the 
                         photosynthetic dynamics of the vegetation, identifying that this 
                         dynamics is related to the rainfall.",
  conference-location = "Santos",
      conference-year = "28-31 maio 2017",
                 isbn = "978-85-17-00088-1",
                label = "59508",
             language = "pt",
         organisation = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                  ibi = "8JMKD3MGP6W34M/3PSMDC7",
                  url = "http://urlib.net/ibi/8JMKD3MGP6W34M/3PSMDC7",
           targetfile = "59508.pdf",
                 type = "Landsat OLI",
        urlaccessdate = "27 abr. 2024"
}