Articles | Volume 17, issue 10
Methods for assessment of models
23 May 2024
Methods for assessment of models |  | 23 May 2024

An objective identification technique for potential vorticity structures associated with African easterly waves

Christoph Fischer, Andreas H. Fink, Elmar Schömer, Marc Rautenhaus, and Michael Riemer

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Cited articles

Bain, C. L., Williams, K. D., Milton, S. F., and Heming, J. T.: Objective tracking of African Easterly Waves in Met Office models, Q. J. Roy. Meteor. Soc., 140, 47–57,, 2014. a, b
Belanger, J. I., Jelinek, M. T., and Curry, J. A.: A climatology of easterly waves in the tropical Western Hemisphere, Geosci. Data J., 3, 40–49,, 2016. a, b, c, d, e, f, g
Berry, G., Thorncroft, C., and Hewson, T.: African Easterly Waves during 2004 – Analysis Using Objective Techniques, Mon. Weather Rev., 135, 1251–1267,, 2007. a
Berry, G. J. and Thorncroft, C.: Case Study of an Intense African Easterly Wave, Mon. Weather Rev., 133, 752–766,, 2005. a
Brammer, A. and Thorncroft, C. D.: Variability and Evolution of African Easterly Wave Structures and Their Relationship with Tropical Cyclogenesis over the Eastern Atlantic, Mon. Weather Rev., 143, 4975–4995,, 2015. a
Short summary
This study presents a method for identifying and tracking 3-D potential vorticity structures within African easterly waves (AEWs). Each identified structure is characterized by descriptors, including its 3-D position and orientation, which have been validated through composite comparisons. A trough-centric perspective on the descriptors reveals the evolution and distinct characteristics of AEWs. These descriptors serve as valuable statistical inputs for the study of AEW-related phenomena.