Clasificación de los tipos de ciclones sobre el Océano Atlántico Sur en proyecciones con RegCM4 y GCMs
DOI:
https://doi.org/10.55761/abclima.v30i18.14603Palabras clave:
Transição tropical. Ciclones tropicais. Ciclones extratropicais. Mudanças climáticas.Resumen
Este estudio tiene como objetivo clasificar los tipos de ciclones sobre el Océano Atlántico Sur en tres proyecciones del Modelo Climático Regional (RegCM4), así como en los modelos globales (GCM) que proporcionaron las condiciones de contorno para el regional, e identificar sistemas que transición a tropical (TT). El escenario climático utilizado es RCP8.5. La clasificación de los tipos de ciclones implica el uso de tres algoritmos: el primero para identificar y rastrear ciclones en el Océano Atlántico Sur en función de la vorticidad relativa a 925 hPa; el segundo para proporcionar las características térmicas de los ciclones a través de la metodología Cyclone Phase Space y el tercero para separar los ciclones en función de sus características térmicas. Considerando el período 2020-2050 (2051-2080), el conjunto de MCG y RegCM4 proyectan una ligera reducción (aumento) en la frecuencia de ciclones tropicales en comparación con el clima actual (1979-2005). Para los ciclones extratropicales, se proyecta una tendencia de frecuencia decreciente. Una de las hipótesis iniciales del estudio fue que en un escenario de calentamiento habría un aumento en el número de TT, sin embargo los resultados obtenidos no indican un cambio en la frecuencia de estos sistemas ya que tanto en el clima presente como en el futuro la el número de transiciones es ~2.8 sistemas por década en ambos conjuntos.
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