@Article{SeluchiChan:2003:EvTwEt,
               author = "Seluchi, Marcelo E. and Chan, Chou Sin",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)/CPTEC} and {}",
                title = "Evaluation of two Eta Model versions for weather forecast over 
                         South America",
              journal = "Geof{\'{\i}}sica Internacional",
                 year = "2003",
               volume = "40",
               number = "3",
                pages = "219--237",
                month = "May",
             keywords = "Meteorologia, modelado regional, desempenho, processos 
                         superficiais, Sudamerica.",
             abstract = "A comparison of performance of two versions of the Eta/CPTEC model 
                         is presented. The new version is an update of an carlier 
                         operational one and includes representation, of soil and 
                         vegetation types. The sofilvegetation model contains two under- 
                         ground layers and a canopy layer. Evaluation was carried out by 
                         comparing the mean and root mean square errors of several 
                         variables for an ensemble of 15 meteorological situations, using 
                         the NCEP analyses, upper air soundings and precipitation data over 
                         South America. Precipitation forecasts were evaluated by the 
                         equitable threat score (ETS) and the b{\'{\i}}as score 
                         (BIAS).The mean errors frorn both versions show similarities 
                         during the first 24 hours of forecast, but surface temperature is 
                         more accurately predicted by the updated model. After 48 hours, 
                         temperature and humidity forecasts show better skill in the new 
                         version too. Over subtropical South America differences are more 
                         evident in temperature and humidity, less so for geopotential 
                         heights and practically nonexistent for horizontal winds. The 
                         precipitation forecasts for the updated version have equitable 
                         threat scores slightly higher and similar bias scores during the 
                         first 24 hours. After 48 hours; this version tends to overestimate 
                         the rainfall, while its spatial distribution remains unaffected.",
           copyholder = "SID/SCD",
                 issn = "0016-7169",
             language = "en",
           targetfile = "Evalution Eta.Seluchi.pdf",
        urlaccessdate = "03 maio 2024"
}