Zhu, X.-S., and H. Yu, 2019: Environmental influences on the intensity and configuration of tropical cyclone concentric eyewalls in the western North Pacific. J. Meteor. Soc. Japan, 97,
Early Online Release Graphical Abstract with highlights
Plain Language Summary: The observed intensity changes of tropical cyclones (TCs) with concentric eyewalls (CEs) often varied case from case. This study establishes a relationship between intensity changes and CE patterns, and also shows the environmental influences on the configuration of different CE patterns. The results may be beneficial for forecasting intensity fluctuations of a TC with CE from the current environmental configurations.
- Definitions for CE patterns are summarized based on the CE structural evolution in microwave satellite observations from 1997 to 2011 in the western North Pacific.
- Statistical results showed that a TC will reach peak intensity around CE formation for one particular CE pattern, while it may intensify to the peak before CE formation for another CE pattern.
- The environmental configurations for the two CE patterns above are significantly different in the moisture inflows, the activities of low-level trough, the subtropical high, and the South Asia high, which are summarized in the three-dimensional conceptual models.