Ambiente associado à gênese do ciclone Yakecan em maio de 2022 no Oceano Atlântico Sul
DOI:
https://doi.org/10.26848/rbgf.v18.6.p4236-4251Keywords:
ciclone subtropical, processos diabáticos, Atlântico SulAbstract
In May 2022, a cyclone that occurred in the southwestern South Atlantic Ocean acquired subtropical characteristics and was named Yakecan by the Brazilian Navy. Since the frequency of subtropical cyclones is small in the South Atlantic, their occurrence demands studies to investigate the physical processes associated with their genesis. Therefore, this study describes the environment that favored the development of Yakecan using ERA5 reanalysis. Through analyses of mean sea level pressure (MSLP) fields and wind at 850 hPa, it was observed that at 1200 Z on May 16, 2022, the merging of two cyclones in the South Atlantic gave rise to a new system, which became the precursor to Yakecan. At that time, the cyclone had not yet acquired subtropical characteristics as the thermal asymmetry parameter did not meet the threshold established for subtropical system classification. However, from 1800 Z on May 16 to 1800 Z on May 19, the system exhibited subtropical characteristics. The environment in which the two cyclones merged was characterized by weak baroclinicity, resulting in weak vertical wind shear (200–850 hPa). This condition favored the organization of convection and the development of the subtropical system.
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References
Ahrens, C. D, Henson, R. (2021). Meteorology today: An introduction to weather, climate and the environment. 13ed., Cengage Learning, Inc.
Beven II, J. L., (1997). A study of three hybrid storms. Preprints, 22d Conf. on Hurricanes and Tropical Meteorology, Fort Collins, CO, American Meteorological Society 645, 646.
Cardoso, A. A., Porfírio da Rocha, R., Simões Reboita, M. et. al. (2025). Performance of the medium and high horizontal resolution models from HighResMIP-CMIP6 in simulating synoptic-scale cyclones over South America. Climate Dynamics, 63, 83. https://doi.org/10.1007/s00382-024-07579-3
CNN, (2022). Entenda como se formou o ciclone Yakecan, que atingiu o Sul do Brasil. Disponível: https://www.cnnbrasil.com.br/nacional/entenda-como-se-formou-o-ciclone-yakecan-que-atingiu-o-sul-do-brasil/. Acesso: 01 set. 2025.
da Rocha, R. P., Reboita, M. S., Gozzo, L. F., Dutra, L. M. M., De Jesus, E. M., (2019). Subtropical cyclones over the oceanic basins: a review. Annals of the New York Academy of Sciences, 1436, 138-156. https://doi.org/10.1111/nyas.13927
de Jesus, E. M., da Rocha, R. P., Crespo, N. M., Reboita, M. S., Gozzo, L. F., (2022). Future climate trends of subtropical cyclones in the South Atlantic basin in an ensemble of global and regional projections. Climate Dynamics 58(3), 1221-1236. https://doi.org/10.1007/s00382-021-05958-8
DHM, Centro de Hidrografia da Marinha do Brasil, (2022). Tempestade Subtropical Yakecan: Relatório Pós-Evento. Niterói. Disponível: https://www.marinha.mil.br/chm/sites/www.marinha.mil.br.chm/files/arquivos/relatorio_pos_evento_yakecan.pdf. Acesso: 30 set. 2024.
Dias Pinto, J. R., Reboita, M. S., da Rocha, R. P., (2013). Synoptic and dynamical analysis of subtropical cyclone Anita (2010) and its potential for tropical transition over the South Atlantic Ocean. Journal of Geophysical Research: Atmospheres 118(19), 10,870-10,883. https://doi.org/10.1002/jgrd.50830
Emanuel, K. A., (1986). An air-sea interaction theory for tropical cyclones. Part I: Steady-state maintenance. Journal of Atmospheric Sciences, 43, 585-605. https://doi.org/10.1175/1520-0469(1986)043%3C0585:AASITF%3E2.0.CO;2
Emanuel, K., Alberti, T., Bourdin, S., Camargo, S. J., Faranda, D., Flaounas, M., ... & Romero, R. (2024). A Unified Framework for Surface Flux-Driven Cyclones Outside the Tropics. EGUsphere, 1-44. https://doi.org/10.5194/egusphere-2024-3387
Gozzo, L. F., da Rocha, R. P., Reboita, M. S., Sugahara, S., (2014). Subtropical cyclones over the southwestern South Atlantic: Climatological aspects and case study. Journal of Climate, 27, 8543-8562. https://doi.org/10.1175/JCLI-D-14-00149.1
Gozzo, L. F., da Rocha, R. P., Gimeno, L., & Drumond, A., (2017). Climatology and numerical case study of moisture sources associated with subtropical cyclogenesis over the southwestern Atlantic Ocean. Journal of Geophysical Research: Atmospheres, 122, 5636-5653. https://doi.org/10.1002/2016JD025764
Hart, R. E., (2003). A cyclone phase space derived from thermal wind and thermal asymmetry. Monthly weather review, 131, 585-616. https://doi.org/10.1175/1520-0493(2003)131%3C0585:ACPSDF%3E2.0.CO;2
Hoskins, B. J., & Hodges, K. I. (2005). A new perspective on Southern Hemisphere storm tracks. Journal of climate, 18(20), 4108-4129. https://doi.org/10.1175/JCLI3570.1
Maria, E. et al., (2020). Measure distance locating nearest public facilities using Haversine and Euclidean Methods. Journal of Physics: Conference Series 2020, 1450, 012080.
Mctaggart-Cowan, R., Bosart, L. F., Davis, C. A., Atallah, E. H., Gyakum, J. R., Emanuel, K. A., (2006). Analysis of hurricane Catarina (2004). Monthly Weather Review 134(11), 3029-3053. https://doi.org/10.1175/MWR3330.1.
McTaggart-Cowan, R., Davies, E. L., Fairman, J. G., Galarneau, T. J., Schultz, D. M., (2015). Revisiting the 26.5 C sea surface temperature threshold for tropical cyclone development. Bulletin of the American Meteorological Society, 96(11), 1929-1943.
Mendes, D., Souza, E. P., Marengo, J. A., & Mendes, M. C., (2010). Climatology of extratropical cyclones over the South American–southern oceans sector. Theoretical and applied climatology, 100, 239-250.
Pérez‐Alarcón, A., Coll‐Hidalgo, P., Fernández‐Alvarez, J. C., Sorí, R., da Rocha, R. P., Reboita, M. S., ... Gimeno, L., (2024). Quantifying the related precipitation and moisture sources in the lifecycle of subtropical cyclones in the South Atlantic basin. Quarterly Journal of the Royal Meteorological Society, 150(762), 2765-2782. https://doi.org/10.1002/qj.4734.
Reboita, M. S., Gozzo, L. F., Crespo, N. M., Custodio, M. S., Lucyrio, V., De Jesus, E. M., da Rocha, R. P., (2022). From a Shapiro–Keyser extratropical cyclone to the subtropical cyclone Raoni: An unusual winter synoptic situation over the South Atlantic Ocean. Quarterly Journal of the Royal Meteorological Society 148(747), 2991-3009. https://doi.org/10.1002/qj.4349
Reboita, M. S., Gan, M. A., da Rocha, R. P., & Custódio, I. S., (2017). Ciclones em Superfície nas Latitudes Austrais: Parte II Estudo de Casos. Revista Brasileira de Meteorologia, 32(4), 509-542. https://doi.org/10.1590/0102-7786324002
Reboita, M. S., da Rocha, R. P., Oliveira, D. M., (2018). Key features and adverse weather of the named subtropical cyclones over the Southwestern South Atlantic Ocean. Atmosphere 10(1), 6. https://doi.org/10.3390/atmos10010006
Reboita, M. S., Crespo, N. M., Dutra, L. M. M., Silva, B. A., Capucin, B. C., da Rocha, R. P., (2021). Iba: the first pure tropical cyclogenesis over the western South Atlantic Ocean. Journal of Geophysical Research: Atmospheres 126, e2020JD033431. https://doi.org/10.1029/2020JD033431
Reboita, M. S., Crespo, N. M., da Rocha, R. P., & Gozzo, L. F., (2024a). Synoptic-Scale Cyclones Affecting South America and the South Atlantic Ocean. Oxford Research Encyclopedia of Climate Science. https://doi.org/10.1093/acrefore/9780190228620.013.970
Reboita, M. S., Nogueira, N. C. D. O., Gomes, I. B. D. S., Palma, L. L. D. C., & da Rocha, R. P., (2024b). Assessment of a Tropical Transition over the Southwestern South Atlantic Ocean: The Case of Cyclone Akará. Journal of Marine Science and Engineering, 12(11), 1934. https://doi.org/10.3390/jmse12111934
Ribeiro, J. G., Paz, G., Reboita, M. S., & Gozzo, L. (2023). Análise do Índice do Potencial de Gênese em Ciclones Subtropicais na Costa do Brasil. Revista Brasileira de Geografia Física, 16, 2832-2857.
Silva, B. A., Reboita, M. S., (2021). Climatologia do Índice do Potencial de Gênese de Ciclones Tropicais nos Oceanos Adjacentes à América do Sul. Anuário do Instituto de Geociências, 44.
Soci, C., Hersbach, H., Simmons, A., Poli, P., Bell, B., Berrisford, P., ... & Thépaut, J. N., (2024). The ERA5 global reanalysis from 1940 to 2022. Quarterly Journal of the Royal Meteorological Society, 150(764), 4014-4048. https://doi.org/10.1002/qj.4803
Zeng, X., Zhao, M., & Dickinson, R. E., (1998). Intercomparison of bulk aerodynamic algorithms for the computation of sea surface fluxes using TOGA COARE and TAO data. Journal of Climate, 11(10), 2628-2644. https://doi.org/10.1175/1520-0442(1998)011%3C2628:IOBAAF%3E2.0.CO;2
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Copyright (c) 1969 Isis da Rocha Plum Ferreira, Michelle Simões Reboita, Luiz Felippe Gozzo
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