Upper tropospheric cyclonic vortices in the tropical South Atlantic

Vernon E. Kousky; Manoel Alonso Gan

doi:10.3402/tellusa.v33i6.10775

Upper tropospheric cyclonic vortices in the tropical South Atlantic

Tellus

Volume 33 (1981): Issue 6

By: Vernon E. Kousky and Manoel Alonso Gan

Open Access

|Jan 1981

Abstract

An analysis of subtropical 200 mb cyclones is made for the South Atlantic. The cyclones are observed to occur primarily during the summer months and generally form near the axes of the mid-oceanic troughs. The relationship between cyclone formation and the presence of 200 mb anticyclones over the continental areas is discussed. Proposed mechanisms for cyclone formation are considered. The cyclones are characterized by a cold core and a direct thermal circulation–the cold air sinking and warm air on the periphery rising. The cloud pattern associated with the cyclones is found to depend on the direct thermal circulation, the vortex location and its direction of movement. The effects of South Atlantic 200 mb cyclonic vortices on Brazilian weather are discussed.

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Articles in this issue

DOI: https://doi.org/10.3402/tellusa.v33i6.10775 | Journal eISSN: 3035-9554

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Language: English

Page range: 538 - 551

Submitted on: Dec 1, 1980

Accepted on: Feb 27, 1981

Published on: Jan 1, 1981

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 1981 Vernon E. Kousky, Manoel Alonso Gan, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 33 (1981): Issue 6