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Common Remarks

During austral summer (Dec-Feb) the upper tropospheric circulation over South America is characterized by the presence of a quasi-stationary high over Bolivia (know as Bolivian high) and a deep trough to its east over northeast Brazil and adjoining Atlantic Ocean (see Figure below). With certain frequency this trough closes forming upper tropospheric cyclonic vortices (UTCV - Kousky and Gan, 1981). The figure below shows an example of a UTCV over the northeast Brazil coast.


17 February 2014 /18.00 UTC - Thermal Infrared (11 µm) channel for GOES-Meteosat composite image (degrees Celsius)
17 February 2014 /18.00 UTC - Water Vapour (6.7 µm) channel for GOES-Meteosat composite image (degrees Celsius).



I. Appearance in Satellite Data

Learn about how to recognise and detect Upper Tropospheric Cyclonic Vortices in The Tropical South Atlantic in satellite images.

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II. Meteorological Physical Background

Find out more about the meteorlogical and physical background of Upper Tropospheric Cyclonic Vortices in The Tropical South Atlantic

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III. Key Parameters

Learn which key parameters to use for montoring Upper Tropospheric Cyclonic Vortices in The Tropical South Atlantic

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IV. Typical Appearance In Vertical Cross Sections

Find out the typical appearance of Arctic Upper Tropospheric Cyclonic Vortices in The Tropical South Atlantic in vertical cross section

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V. Weather Events

Explore the weather events associated with Upper Tropospheric Cyclonic Vortices in The Tropical South Atlantic

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VI. References

Let these comprehensive documents in the references assist you in finding more about Upper Tropospheric Cyclonic Vortices in The Tropical South Atlantic

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