Contrasting convective regimes over the Amazon

Implications for cloud electrification

E. Williams, D. Rosenfeld, N. Madden, J. Gerlach, N. Gears, L. Atkinson, N. Dunnemann, G. Frostrom, M. Antonio, B. Biazon, R. Camargo, H. Franca, A. Gomes, M. Lima, R. Machado, S. Manhaes, L. Nachtigall, H. Piva, W. Quintiliano, L. Machado & 13 others P. Artaxo, G. Roberts, N. Renno, R. Blakeslee, J. Bailey, D. Boccippio, A. Betts, D. Wolff, B. Roy, J. Halverson, T. Rickenbach, Jose Fuentes, E. Avelino

Research output: Contribution to journalArticle

289 Citations (Scopus)

Abstract

Four distinct meteorological regimes in the Amazon basin have been examined to distinguish the contributions from boundary layer aerosol and convective available potential energy (CAPE) to continental cloud structure and electrification. The lack of distinction in the electrical parameters (peak flash rate, lightning yield per unit rainfall) between aerosol-rich October and aerosol-poor November in the premonsoon regime casts doubt on a primary role for the aerosol in enhancing cloud electrification. Evidence for a substantial role for the aerosol in suppressing warm rain coalescence is identified in the most highly polluted period in early October. The electrical activity in this stage is qualitatively peculiar. During the easterly and westerly wind regimes of the wet season, the lightning yield per unit of rainfall is positively correlated with the aerosol concentration, but the electrical parameters are also correlated with CAPE, with a similar degree of scatter. Here cause and effect are difficult to establish with available observations. This ambiguity extends to the ‘‘green ocean’’ westerly regime, a distinctly maritime regime over a major continent with minimum aerosol concentration, minimum CAPE, and little if any lightning.

Original languageEnglish (US)
Article number8082
JournalJournal of Geophysical Research: Atmospheres
Volume107
Issue numberD20
DOIs
StatePublished - Jan 1 2002

Fingerprint

electrification
aerosols
Aerosols
aerosol
lightning
Lightning
Potential energy
potential energy
Rain
rain
westerly
energy
rainfall
continents
coalescence
Coalescence
wet season
ambiguity
coalescing
flash

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Williams, E., Rosenfeld, D., Madden, N., Gerlach, J., Gears, N., Atkinson, L., ... Avelino, E. (2002). Contrasting convective regimes over the Amazon: Implications for cloud electrification. Journal of Geophysical Research: Atmospheres, 107(D20), [8082]. https://doi.org/10.1029/2001JD000380
Williams, E. ; Rosenfeld, D. ; Madden, N. ; Gerlach, J. ; Gears, N. ; Atkinson, L. ; Dunnemann, N. ; Frostrom, G. ; Antonio, M. ; Biazon, B. ; Camargo, R. ; Franca, H. ; Gomes, A. ; Lima, M. ; Machado, R. ; Manhaes, S. ; Nachtigall, L. ; Piva, H. ; Quintiliano, W. ; Machado, L. ; Artaxo, P. ; Roberts, G. ; Renno, N. ; Blakeslee, R. ; Bailey, J. ; Boccippio, D. ; Betts, A. ; Wolff, D. ; Roy, B. ; Halverson, J. ; Rickenbach, T. ; Fuentes, Jose ; Avelino, E. / Contrasting convective regimes over the Amazon : Implications for cloud electrification. In: Journal of Geophysical Research: Atmospheres. 2002 ; Vol. 107, No. D20.
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Williams, E, Rosenfeld, D, Madden, N, Gerlach, J, Gears, N, Atkinson, L, Dunnemann, N, Frostrom, G, Antonio, M, Biazon, B, Camargo, R, Franca, H, Gomes, A, Lima, M, Machado, R, Manhaes, S, Nachtigall, L, Piva, H, Quintiliano, W, Machado, L, Artaxo, P, Roberts, G, Renno, N, Blakeslee, R, Bailey, J, Boccippio, D, Betts, A, Wolff, D, Roy, B, Halverson, J, Rickenbach, T, Fuentes, J & Avelino, E 2002, 'Contrasting convective regimes over the Amazon: Implications for cloud electrification', Journal of Geophysical Research: Atmospheres, vol. 107, no. D20, 8082. https://doi.org/10.1029/2001JD000380

Contrasting convective regimes over the Amazon : Implications for cloud electrification. / Williams, E.; Rosenfeld, D.; Madden, N.; Gerlach, J.; Gears, N.; Atkinson, L.; Dunnemann, N.; Frostrom, G.; Antonio, M.; Biazon, B.; Camargo, R.; Franca, H.; Gomes, A.; Lima, M.; Machado, R.; Manhaes, S.; Nachtigall, L.; Piva, H.; Quintiliano, W.; Machado, L.; Artaxo, P.; Roberts, G.; Renno, N.; Blakeslee, R.; Bailey, J.; Boccippio, D.; Betts, A.; Wolff, D.; Roy, B.; Halverson, J.; Rickenbach, T.; Fuentes, Jose; Avelino, E.

In: Journal of Geophysical Research: Atmospheres, Vol. 107, No. D20, 8082, 01.01.2002.

Research output: Contribution to journalArticle

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T2 - Implications for cloud electrification

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AU - Rosenfeld, D.

AU - Madden, N.

AU - Gerlach, J.

AU - Gears, N.

AU - Atkinson, L.

AU - Dunnemann, N.

AU - Frostrom, G.

AU - Antonio, M.

AU - Biazon, B.

AU - Camargo, R.

AU - Franca, H.

AU - Gomes, A.

AU - Lima, M.

AU - Machado, R.

AU - Manhaes, S.

AU - Nachtigall, L.

AU - Piva, H.

AU - Quintiliano, W.

AU - Machado, L.

AU - Artaxo, P.

AU - Roberts, G.

AU - Renno, N.

AU - Blakeslee, R.

AU - Bailey, J.

AU - Boccippio, D.

AU - Betts, A.

AU - Wolff, D.

AU - Roy, B.

AU - Halverson, J.

AU - Rickenbach, T.

AU - Fuentes, Jose

AU - Avelino, E.

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