author = "Rigozo, Nivaor Rodolfo and Echer, Mariza Pereira de Souza and 
                         Echer, Ezequiel and Silva, H. E. and Dal Lago, Alisson",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade do Estado do Rio de 
                         Janeiro (UERJ)} and {Instituto Nacional de Pesquisas Espaciais 
                title = "Signal solar in deuterium from Antarctic and Greenland",
                 year = "2015",
         organization = "International Congress of the Brazilian Geophysical Society, 14.",
             abstract = "A time series study was conducted in order to identify dominant 
                         variability of deuterium/hydrogen ratios obtained in snow, firn 
                         snow and ice samples of an ice core from: Lange Glacier (King 
                         George Island/Antarctic Peninsula, lat 62o 07S, long 58o 37W), 
                         Dronning Maud Land in the Atlantic sector of Antarctica (7135'S, 
                         326W), and from GISP2, Greenland (7236N, 3830W). Periodicities 
                         were estimated by using classical spectral analysis (iterative 
                         regression) and multiresolution analysis. The 11 yr solar cycle 
                         was clearly identified in the spectral analysis. The 11 yr 
                         frequency band has been reconstructed from the parameters found in 
                         spectral analysis (amplitude, frequency and phase). It was 
                         observed a high cross-correlation (r>0.6) between \D and 
                         solar activity indexes (sunspot number, aa index, protons high 
                         energy, >100 MeV). A multiresolution analysis also has been 
                         performed in all-time serie and has shown a high cross-correlation 
                         between this time series for the frequency level D2, D3, D4, D5 e 
                         A5. This suggests the hypothesis that part of the deuterium (2H) 
                         measured at Earth comes from the Sun as part of the solar wind or 
                         that high-energy solar protons produce the deuterium in the Earth 
  conference-location = "Rio de Janeiro, RJ",
      conference-year = "3-6 Aug.",
        urlaccessdate = "24 nov. 2020"