edu.ucar.opensky::articles:26633 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:55:40.970776 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7ks6wjj Documenting Coherent Turbulent Structures in the boundary layer of intense hurricanes through wavelet analysis on IWRAP and SAR data 2023-01-01T00:00:00Z publication https://n2t.org/ark:/85065/d7ks6wjj https://doi.org/10.1109/TGRS.2023.3305998 Protzko, D. E. author Guimond, S. R. author Jackson, C. R. author Sapp, J. W. author Jelenak, Zorana author Chang, P. S. author UCAR/NCAR - Library publisher New radar remote sensing measurements of the turbulent hurricane boundary layer (HBL) are examined through analysis of airborne (Imaging Wind and Rain Airborne Profiler (IWRAP)) and spaceborne (synthetic aperture radar (SAR)) data from Hurricanes Dorian (2019) and Rita (2005). These two systems provide a wide range of storm intensities and intensity trends to examine the turbulent HBL. The central objective of the work is to document the characteristics of coherent turbulent structures (CTSs) found in the eyewall region of the HBL. Examination of the IWRAP data in Dorian shows that the peak, localized wind speeds are found inside the CTSs near the eye-eyewall interface. The peak winds are typically located at lower levels (0.15-0.50) km but sometimes are found at higher levels (1.0-1.5 km) when the CTSs are stretched vertically. A SAR overpass of Dorian's eyewall showed ocean surface backscatter perturbations at the eye-eyewall interface that have connections to the CTSs identified in the IWRAP data. Wavelet analysis, including detailed significance testing, was performed on the IWRAP and SAR data to study the CTS wavelengths and power characteristics. Both datasets showed a multiscale structure in the wavelet power spectrum with peaks at similar to 10 km (eyewall), similar to 4-5 km (merger of small-scale eddies), and similar to 2 km (native scale of the CTSs). The similar to 2-km native scale of the CTSs is robust across intensity trends (rapid intensification, weakening, and steady state), storm cases, and region of the storm. This information is useful for turbulence parameterization schemes used in numerical models that require the specification of a turbulent length scale. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation