Avaliação de desempenho dos esquemas de camada limite planetária do modelo WRF para a Região Metropolitana de Salvador - BA

• Autor(a) principal: Kitagawa, Yasmin Kaore Lago
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/9450
• topic: WRF; Atmospheric modelling; Planetary boundary layer; Modelagem atmosférica; Modelo WRF; Engenharia Sanitária; Salvador (BA); Bahia; Camada limite planetária; 628

Exchanges of moisture, heat, and momentum occur within the planetary boundary layer (PBL)through mixing associated with turbulent eddiesthat influence the way in which lower-tropospheric thermodynamic and kinematic structures evolve. Howeversuch eddies operate on spatiotemporal scales that cannot be explicitly represented on grid scales and time steps employed in most mesoscale models. As such, their effects are expressed in these models via the use of PBL parameterization schemes. In this way, the present work used the Weather Research and Forecasting (WRF)model to find a set of physical parameterization that represents thelocalatmospheric circulation of theMetropolitan Region of Salvador (RMS) which counts with several industrial complexes that affect the air quality of the region. In addition, the workexpects to contributescientifically to researches related toatmospheric processes represented by numerical models that occur in tropical and coastal regions.Since there wasno previouswork performing any assessment in this area using WRF model, the performance of six PBL schemes were evaluated –Boucheau e Lacarrere (BOU), Grenier e Bretherton (GBM), Mellor-Yamada-Janjić (MYJ), Mellor-Yamada-Nakanishi-Niino (MYNN2), Bretherton e Park(UW) e Yonsei University (YSU).The model performance was performed using statistical metrics of mean bias (MB), root mean square error (RMSE), mean absolute gross error (MAGE), correlation coefficient (r) and index of agreement (IOA) between simulated and observed data in the surface meteorological stations of the region through the meteorological variables air temperature at 2 meters (T2), wind speed and direction at 10 meters (WS10 and WD10).MYJ scheme showedthe best performance for WS10, while BOU and UW schemes stood out for WD10. Regarding T2, MYNN2 and, again, MYJ, presented the best results.However, it is worth to point out that results indicate that there were no statistically significant differences using different PBL schemes.Analysis of simulated PBLheights (PBLH) and vertical profiles of water vapor, potential temperature and wind speed and direction were also made, it was observed that the WRF model produced low values of PBLH, neverthelessit was inferred that even so the model was able to present satisfactory results for the behavior of vertical profiles.It was concluded that the WRF model presented good performance and was able to simulate the atmospheric conditions that characterize RMS.