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5 results for “Secondary Eyewall”
Data from: Documenting the progressions of secondary eyewall formations
<p>Intense tropical cyclones can form secondary eyewalls (SEs) that contract towards the storm center and eventually replace the inner eyewall, a process known as an eyewall replacement cycle (ERC). However, SE formation does not guarantee an eventual ERC, and often, SEs follow differing evolutionary pathways. This study documents SE evolution and progressions observed in numerous tropical cyclones, and results in two new datasets using passive microwave imagery: a global subjectively labeled dataset of SEs and eyes and their uncertainties from 72 storms between 2016–19, and a dataset of 87 SE progressions that highlights the broad convective organization preceding and following a SE formation.</p> <p>The results show two primary SE pathways exist, No Replacement, known as Path 1, and Replacement, known as the Classic Path. Most interestingly, 53% of the most certain SE formations result in an eyewall replacement. The Classic Path is associated with stronger column average meridional wind, a faster poleward component of storm motion, more intense storms, weaker vertical wind shear, greater relative humidity, a larger storm wind field, and stronger cold air advection.</p> <p>This study highlights a greater number of potential SE pathways exist than previously thought. The results of this study detail several observational features of SE evolution that raise questions regarding the physical processes driving SE formations. Most importantly, environmental conditions and storm metrics identified here provide guidance for predictors in artificial intelligence applications for future tropical cyclone SE detection algorithms.</p>
Data from: Documenting the progressions of secondary eyewall formations
Open the record for dataset details and reuse information.
Data from: The role of outflow-layer inertial stability in governing the radial location of secondary eyewall formation in tropical cyclones
Open the record for dataset details and reuse information.
Stronger Vertical Wind Shear Leads to Earlier Secondary Eyewall Formation
<p>file1(s100_azimuthal_uvrd.d) : S100's u、v wind and reflectivity </p> <p>fie2(s100_chi_vr.d): S100's the irrotational component of the radial velocity</p> <p>file3(s125_azimuthal_saturation_deficit.d): S125's column-integrated saturation deficit </p>
Tropical Cyclone Secondary Eyewall Formation in Environmental Helicity
<p>original dataset</p>
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