What is it about?
One of the main ways in which eddies in the atmosphere in the Southern Hemisphere vary from month to month is in a pattern of three lows and three highs, which we call the zonal wave-3 pattern, or zonal wavenumber 3. This paper shows how the strength and positioning of this pattern influences rainfall globally, and how it impacts extreme rainfall in South America in particular.
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This page is a summary of: Zonal Wavenumber 3 Forces Extreme Precipitation in South America, Journal of Climate, July 2024, American Meteorological Society,
DOI: 10.1175/jcli-d-23-0739.1.
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