EVALUATION OF DIFFERENT BOUNDARY LAYER SCHEMES FOR FOG EVENTS SIMULATION AND FORECASTING IN RIO GRANDE DO SUL

Nórton Franciscatto de Paula, Franciano Scremin Puhales, Gabriele Golart Silva, Jéssica Melo Mintegui, Vagner Anabor, Everson Dal Piva, Felipe Denardin Costa

Abstract


In this work we used two boundary layer schemes to reproduce numerically a persistent fog event in Santa Maria, Rio Grande do Sul. The model employed was WRF using, as initial and boundary conditions, GFS data. The boundary layer employed schemes were the Mellor-Yamada-Janic (MYJ) and Yonsei University (YSU). Generally, boundary layer overestimate of wind speed values schemes 10m and represent relatively well temperature. However, the relative humidity does not represent the fog condition, not reaching saturation in some cases. When saturation is achieved the same if not properly maintained during the occurrence of the event.


Keywords


Fog; WRF; Planetary Boundary Layer; Mellor-Yamada-Janic (MYJ); Yonsei University (YSU)

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DOI: http://dx.doi.org/10.5902/2179460X25940

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Ciência e Natura

EISSN  2179-460X

ISSN 0100-8307

DOI 10.5902

 

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