TROPICAL DEPRESSION FLORENCE Discussion Thread
Sept 11, 2018 10:33:05 GMT -6
greeneyedgirl likes this
Post by weunice on Sept 11, 2018 10:33:05 GMT -6
From Wikipedia
An annular tropical cyclone is a tropical cyclone that features a normal to large, symmetric eye surrounded by a thick and uniform ring of intense convection, often having a relative lack of discrete rainbands, and bearing a symmetric appearance in general. As a result, the appearance of an annular tropical cyclone can be referred to as akin to a tire or doughnut.[1] Annular characteristics can be attained as tropical cyclones intensify; however, outside the processes that drive the transition from asymmetric systems to annular systems and the abnormal resistance to negative environmental factors found in storms with annular features, annular tropical cyclones behave similarly to asymmetric storms. Most research related to annular tropical cyclones is limited to satellite imagery and aircraft reconnaissance as the conditions thought to give rise to annular characteristics normally occur over water well removed from landmasses where surface observations are possible
The bold is important with annular hurricanes. The key factor here is that with an annular hurricane it may be less prone to eyewall replacement cycles and thus can maintain high intensity better.
