Open AccessAccessible Environments for Diurnal-Period Waves in Simulated Tropical Cyclones
Author(s) -
Morgan O’Neill,
Diamilet Perez-Betancourt,
Allison A. Wing
Publication year - 2017
Publication title -
journal of the atmospheric sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.853
H-Index - 173
eISSN - 1520-0469
pISSN - 0022-4928
DOI - 10.1175/jas-d-16-0294.1
Subject(s) - eye , diurnal cycle , tropical cyclone , diurnal temperature variation , outflow , climatology , troposphere , environmental science , tropical cyclone rainfall forecasting , anticyclone , cyclone (programming language) , atmospheric sciences , storm , tropical cyclogenesis , geology , meteorology , geography , field programmable gate array , computer science , computer hardware
A recent observational analysis has reported significant repeating diurnal signals propagating outward at cloud-top height from tropical cyclone centers. Modeling studies suggest that the visible upper-level impacts reflect a diurnal cycle through the depth of the troposphere. In this study, the possibility of wavelike diurnal responses in tropical cyclones is characterized using 3D cloud-resolving numerical simulations with and without a diurnal cycle. Diurnal waves can only begin to propagate well beyond the storm core, and the outflow region is most receptive to near-core diurnal propagation because of its anticyclonic flow. The tropical cyclone structure appears particularly hostile to diurnal wave propagation during periods when the eyewall experiences a temporary breakdown similar to an eyewall replacement cycle.