Abstract
AbstractRecent analysis of Weather Research and Forecasting simulations shows that the flow around high‐pressure regions that often develop at the top of Hurricanes (15‐km altitude) violates the gradient wind balance, hence termed as “gradient nonbalance.” While observations at such high altitudes are rare, recently, NASA‐HS3 and the Office of Naval Research‐Tropical Cyclone Intensity campaigns deployed dropsondes from unprecedented levels around 18 km. In this work we use a wavenumber decomposition method to reproduce 2‐D slices and 3‐D structures from three storms from these campaigns: Edouard (2014), Joaquin (2015), and Patricia (2015). The analyzed data show that the development of high pressure at the hurricane's top leads to various degrees of gradient nonbalance. These highs are a hydrostatic reflection of the storm tilt, which offsets the warm core with respect to the near surface low and the slanted eyewall. The implications of these findings and the relations with recent reports of upper‐level wind field are discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.