@Article{AlcāntaraBoAsStNoLo:2010:InReIt,
               author = "Alc{\^a}ntara, Enner Herenio de and Bonnet, M. P. and Assireu, 
                         Arcilan Trevenzoli and Stech, Jos{\'e} Luis and Novo, Evlyn 
                         M{\'a}rcia Le{\~a}o de Moraes and Lorenzzetti, Jo{\~a}o 
                         Antonio",
          affiliation = "{} and {} and {Instituto Nacional de Pesquisas Espaciais (INPE)} 
                         and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "On the water thermal response to the passage of cold fronts: 
                         initial results for Itumbiara reservoir (Brazil)",
              journal = "Hydrology and Earth System Sciences Discussions",
                 year = "2010",
               volume = "7",
                pages = "9437--9465",
                 note = "{Setores de Atividade: Educa{\c{c}}{\~a}o.}",
             keywords = "Limnologia, Frentes Frias, Reservat{\'o}rios, Fluxos de calor.",
             abstract = "The passage of meteorological systems such as cold fronts or 
                         convergence zones over reservoirs can cause significant 
                         modifications in several aquatic variables. Cold fronts coming 
                         from higher latitudes and reaching the Southeastern Brazilian 
                         territory modify the mean wind field and have important impact 
                         over physical, chemical and biological processes that act in the 
                         hydroelectric reservoirs. The mean period of cold front passages 
                         along the Southeastern Brazilian coast is 6 days during the winter 
                         and between 11 and 14 days in the summer. Most of these fronts 
                         also affect the hinterland of S{\~a}o Paulo, Minas Gerais and 
                         Goi{\'a}s states. The objective of this work is to analyze the 
                         influence of cold front passages in the thermal stratification and 
                         water quality of the Itumbiara hydroelectric reservoir which is 
                         located in Minas Gerais and Goi{\'a}s. The characterization of 
                         cold front passages over the study area was done through the 
                         analysis of GOES satellite images. The analyzed data set includes 
                         time series of meteorological (wind direction and intensity, 
                         short-wave radiation, air temperature, relative humidity, 
                         atmospheric pressure) and water temperature in four depths (5, 12, 
                         20 and 40 m). The data set was acquired in the interior of the 
                         reservoir by an autonomous anchored buoy system at a sampling rate 
                         of 1 h. The stratification was assessed by non-dimensional 
                         parameter analysis. The lake number an indicator of the degree of 
                         stability and mixing in the reservoir was used in this analysis. 
                         We will show that during the cold front all atmospheric parameters 
                         respond and this response are transferred immediately to the water 
                         surface. The main effect is observed in the water column, when the 
                         heat loss in the surface allows the upwelling events caused by 
                         convective cooling due to the erosion of thermal stratification.",
                  doi = "10.5194/hessd-7-9437-2010",
                  url = "http://dx.doi.org/10.5194/hessd-7-9437-2010",
                 issn = "1812-2108",
                label = "lattes: 3852581196429739 6 Alc{\^a}ntaraBoAsStNoLo:2010:InReIt",
             language = "en",
           targetfile = "hessd-7-9437-2010-print.pdf",
        urlaccessdate = "03 maio 2024"
}