Zhou, X., L. Wu, Q. Liu, and Y. Zheng, 2020: Influence of low-level, high-entropy air in the eye on tropical cyclone intensity: A trajectory analysis. J. Meteor. Soc. Japan, 98, 1231–1243.
Early Online Release Graphical Abstract with highlights
Plain Language Summary: Whether the high-entropy eye air can substantially increase tropical cyclone (TC) intensity through mixing with eyewall air and enhancing eyewall convection is still a scientific issue. This study quantitatively evaluates the relative importance of the entrainment of this air by trajectory analysis. The result suggests that the low-level, high-entropy air from the eye has little direct influence on TC intensity by providing relatively small mass and thermodynamic contributions.
- The entrainment occurs favorably on the quadrants of enhanced eyewall convection and is enhanced in the presence of small-scale disturbances in the inner edge of the eyewall.
- The eye air from the low-level, high-entropy reservoir accounts for 5.8% of the equivalent potential temperature change below 3 km and 4.5% of the total mass transport at 3 km in the TC eyewall.