Preliminary methodology for identifying relationships between sea breeze and Amazonian squallines
Keywords:Amazon convection, Mesoscale, Wavelet transform
The objective of this work was to present a preliminary methodology that is able to identify some characteristics of the relationship between the sea breeze circulation and the Amazonian squalline, aiming to understand a little more of the necessary conditions for the deepening of the associated cloudiness. The wavelet transform was applied to the wind and divergence data of ERA5 reanalysis, and a classification was afterwards developed to highlight exclusively the days considered the ideal active period to formation and intensification of the sea breeze circulation and initiation of the Amazonian squalline. The results showed that the relationship between the sea breeze circulation and the Amazonian squalline may be related to the influence of wind at 800 hPa and divergence at 200 hPa. The analysis of average field of the active period days ideal for formation and intensification of the sea breeze circulation and initiation of the Amazonian squalline was able to represent important wind-related characteristics (low level jet between 850 and 750 hPa) and divergence at 200 hPa, indicating that these characteristics, before being directly related to the Amazonian squalline, may first influence the sea breeze circulation performance and intensification.
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