Easterly Wave Disturbances Activity Over the Eastern Northeast Brazil During 2006-2010 Rainy Seasons

Authors

  • Bruce Francisco Pontes da Silva IAG/USP
  • Rosmeri Porfírio da Rocha USP
  • Helber Barros Gomes USP

Keywords:

Easterly Wave Disturbances, composites, precipitation, wind, eastern part of Northeast Brazil

Abstract

Year after year, serious damages and financial losses have been caused by the intense rains associated with the Eastern Wave Disturbances (EWD) during the rainy season in eastern Northeast Brazil (ENEB). In order to contribute to the construction of methods capable of predicting EWDs more effectively, also allowing timely weather warnings to be issued to society, this study seeks to quantify the contribution of EWD during the ENEB rainy season and characterize their average synoptic processes for the period from 2006 to 2010. EWDs were identified through satellite images, streamlines, relative vorticity and divergence from the ERA-Interim reanalysis. On average, 23 EWD/rainy season were identified, representing 50-70% of the total precipitation.

Author Biographies

Bruce Francisco Pontes da Silva, IAG/USP

Graduated in meteorology from the Institute of Atmospheric Sciences at the Federal University of Alagoas (ICAT/UFAL) and a master's degree in the same area from the Institute of Astronomy, Geophysics and Atmospheric Sciences at the University from São Paulo (IAG/USP). From 2012 to early 2020, he worked in research and operation in meteorology/agrometeorology at the Capixaba Institute for Research, Technical Assistance and Rural Extension (Incaper). Since March 2020, he was assigned to Cepdec/CBMES (Espírito Santo State civil defense).

Rosmeri Porfírio da Rocha, USP

BSc and MSc in Meteorology at University of São Paulo (USP) and Doctor in Meteorology from the National Institute of Spatial Research (Inpe). Currently holds the position of Professor on USP.

Helber Barros Gomes, USP

BSc in Meteorology at Federal University of Alagoas (Ufal) in 2005, MSc in Meteorology at University of São Paulo (USP) in 2008 and Doctor in Meteorology also from USP in 2012. Currently holds the position of Adjunct Professor on Ufal in the Institute of Atmospheric Sciences (Icat/Ufal).

References

Alves, MAS, Oyama MD and Yamazaki J. Composição de Ventos de Distúrbios Ondulatórios de Leste sobre as Regiões de Alcântara e Natal: Caracterização Preliminar. XIV Congresso Brasileiro de Meteorologia, Florianópolis. 2006.

Asnani GC (1993) Tropical Meteorology. In: Easterly Waves. Pashan, India. 1202p.

Burpee RW (1974). Characteristics of North African easterly waves during the summers of 1968 and 1969. Journal of the Atmospheric Sciences, 31(6), 1556-1570.

Céron JP, JF Guérémy 1999. Validation Of The Space–Time Variability Of African Easterly Waves Simulated By The CNRM GCM. J. Climate, 12, 2831–2855.

Chang CP and Miller CR 1977. Comparison Of Easterly Waves In The Tropical Pacific During Two Contrasting Periods Of Sea-Surface Temperature Anomalies. J. Atmos. Sci., 34, 615- 28.

Chan CS (1990) Análise de distúrbios ondulatórios de leste sobre o Oceano Atlântico Equatorial Sul. Dissertation, Instituto Nacional de Pesquisas Espaciais.

Da Rocha RP, Rodrigues CAM, Cuadra SV and Ambrizzi T (2009). Precipitation diurnal cycle and summer climatology assessment over South America: An evaluation of Regional Climate Model version 3 simulations. Journal of Geophysical Research, v. 114, p. 1-19. (doi: 10.1029/2008JD010212).

Dee, DP et al. 2011. The Era-Interim Reanalysis: Configuration And Performance Of The Data Assimilation System. Quarterly Journal Of The Royal Meteorological Society. 137:656, 553-597.

Espinoza ES (1996) Distúrbios Nos Ventos De Leste No Atlântico Tropical. Dissertation, Instituto Nacional De Pesquisas Espaciais.

Fedorova N (2008). Sinótica III: Frentes, Correntes De Jato, Ciclones e Anticiclones. In: Anticiclones. Maceió, Alagoas.

Gomes, HB; Ambrizzi, T; Pontes Da Silva, BF; Hodges, K; Silva Dias, PL; Herdies, DL; Silva, MCL; Gomes, HB. Climatology of easterly wave disturbances over the tropical South Atlantic. Climate Dynamics, v. 51, p. 1-19, 2019.

Hall, BA. Westward-Moving Disturbances In The South Atlantic Coinciding With Heavy Rainfall Events At Ascension Island. 1989. Meteorology Magazine, V.118, P.175-181, 1989.

Huffman, GJ, Adler RF, Bolvin DT, Gu G, Nelkin EJ, Bowman KP, Stocker EF, Wolff DB (2007) The TRMM Multi-Satellite Precipitation Analysis: Quasi-Global, Multi-Year, Combined-Sensor Precipitation Estimates At Fine Scale. J. Hydrometeor., 8, 33-55.

Keshavamurty RN (1971) Vertical Coupling In The Indian Summer Monsoon. Nature Physical Science 232, 169-170.

Kouadio YK, Servain J, Machado LAT and Lentini CAD (2012) Heavy Rainfall Episodes In The Eastern Northeast Brazil Linked To Large-Scale Ocean-Atmosphere Conditions In The Tropical Atlantic. Advances In Meteorology, Article Id 369567, 16 Pages, 2012. Doi:10.1155/2012/369567.

Kousky VE (1980) Diurnal Rainfall Variation In Northeast Brazil. Mon. Weather Rev, 108, 488-498.

Kousky VE (1979) Frontal Influences On Northeast Brazil. Mon. Wea. Rev., 107, 1142-1153.

Krishnamurti TN, Baumhefner D (1966) Structure Of A Tropical Disturbance Based On Solutions Of A Multilevel Baroclinic Model. Journal Of Applied Meteorology, Vol. 5, Issue 4, Pp.396-406.

Merritt ES (1964) Easterly Waves And Perturbations: A Reappraisal. Journal Of Applied Meteorology, 3:367-382.

Molion LCB and Bernardo SO (2002) Uma Revisão Da Dinâmica Das Chuvas No Nordeste Brasileiro. Revista Brasileira De Meteorologia, V.17, N.1, P. 1-10.

Mota GV (1997) Estudo Observacional De Distúrbios Ondulatórios De Leste No Nordeste Brasileiro. Dissertation, University of Sao Paulo.

Mota GV and Gandu AW (1996) Análise de Distúrbios Ondulatórios de Leste que Afetam o Nordeste Brasileiro: Um Estudo De Caso. IX Congresso Brasileiro De Meteorologia.

Mota GV and Gandu AW (1998) Análise Dos Padrões Ondulatórios De Leste No Nordeste Brasileiro Durante O Inverno De 1994. X Congresso Brasileiro De Meteorologia, Brasília.

Neiva EJF (1975) An Investigation Of Wave-Type Disturbances Over The Tropical South-Atlantic. Dissertation, Naval Post Graduate School, Monterrey, California.

Philander SG (1990) El Niño, La Niña, And The Southern Oscillation. Academic Press, International Geophysics Series, Vol. 46.

Pontes da Silva BF (2008) Sistemas Sinóticos Associados Às Precipitações Intensas No Estado De Alagoas. Maceió, pp 149. Trabalho De Conclusão De Curso – Instituto De Ciências Atmosféricas, Universidade Federal De Alagoas.

Pontes da Silva BF, Fedorova N, Levit V, Peresetsky A And Brito BM (2011) Sistemas Sinóticos Associados Às Precipitações Intensas No Estado De Alagoas. Revista Brasileira De Meteorologia, V.26, N.3, pp 323 - 338.

Reed JR and Recker EE (1971) Structure And Properties Of Synoptic-Scale Wave Disturbances In The Equatorial Western Pacific. J. Atmos. Sci., 28, pp 1117-1133.

Reed RJ, Norquist DC and Recker EE (1977) The Structure And Properties Of African Wave Disturbances As Observed During Phase III Of Gate. Mon. Wea. Rev. 105, pp 317–333.

Riehl H (1979) Climate And Weather In The Tropics. London: Academic Press. XII + 611 Pp.

Riehl H (1945) Waves In The Easterlies And The Polar Front In The Tropics, Chicago: University Of Chicago Press, 79p.

Rosenthal SL (1960) A Simplified Linear Theory Of Equatorial Easterly Waves. J. Meteor., 17, pp 484–488. Doi: Http://Dx.Doi.Org/10.1175/1520-0469(1960)017<0484:Asltoe>2.0.Co;2.

Shapiro LJ (1977) Tropical Storm Formation From Easterly Waves: A Criterion For Development. J. Atmos. Sci., 34(7), pp 1007-1021.

Tai KS and Ogura Y (1987) An Observational Study Of Easterly Waves Over The Eastern Pacific In The Northern Summer Using FGEE Data. Journal Of The Atmospheric Sciences, 44(2):pp 339-361.

Thorncroft C and Hodges K (2001) African Easterly Wave Variability And Its Relationship To Atlantic Tropical Cyclone Activity, J. Clim., v. 14, pp 1166-1179.

Uvo CRB and Nobre CA (1989) A Zona De Convergência Intertropical (ZCIT) e a Precipitação No Norte Do Nordeste Do Brasil. Parte I: A Posição Da ZCIT No Atlântico Equatorial. Climanálise, Vol. 4, N 07, pp 34-40.

Wilks DS (2006) Statistical Methods In The Atmospheric Sciences. Ed. 2nd, Academic Press San Diego, 467p.

Williams KT (1970) Characteristics Of The Wind, Thermal, And Moisture Fields Surroundings The Satellite-Observed Mesoscale Trade Wind Cloud Clusters In The Western North Pacific. Preprints Of Papers, Symp. Tropical Meteorology, Honolulu, Amer. Meteor. Soc., D Iv-1 A D Iv-6.

Yamazaki Y and Rao VB (1977) Tropical Cloudiness Over The South Atlantic Ocean, Journal Of The Meteorological Society Of Japan, 55(2), pp 205-207.

Yamazaki Y (1975) Estudos Teóricos E Sinóticos Dos Distúrbios Tropicais. Dissertation, Instituto Nacional de Pesquisas Espaciais.

Yanai M (1963) A Preliminary Survey Of Large-Scale Disturbances Over The Tropical Pacific Region. Geofis. Int., 3, pp 73–84.

Yanai M (1968) Evolution of a Tropical Disturbance in the Caribbean Sea Region. J. Of The Meteorol. Soc. Of Japan, 46, pp 86-109.

Downloads

Published

2021-05-16

How to Cite

da Silva, B. F. P. ., da Rocha, R. P. ., & Gomes, H. B. . (2021). Easterly Wave Disturbances Activity Over the Eastern Northeast Brazil During 2006-2010 Rainy Seasons. Revista Científica Foz, 3(2), 30. Retrieved from https://revista.ivc.br/index.php/revistafoz/article/view/199

Issue

Vol. 3 No. 2 (2020): Revista Científica FOZ

Section

Artigo de temática livre

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.

Os autores mantêm os direitos autorais e concedem à revista o direito de publicação inicial, com o trabalho simultaneamente licenciado sob a Licença Creative Commons 4.0, Atribuição-Sem Derivações, e pelos direitos de publicação. Os autores podem publicar seus trabalhos on-line em repositórios institucionais / disciplinares ou nos seus próprios sites.