Sheared deep vortical convection in pre-depression Hagupit during TCS08
Bell, Michael M.
Montgomery, Michael T.
MetadataShow full item record
Airborne Doppler radar observations from the recent Tropical Cyclone Structure 2008 field campaign in the western North Pacific reveal the presence of deep, buoyant and vortical convective features within a vertically‐sheared, westward‐moving pre‐depression disturbance that later developed into Typhoon Hagupit. On two consecutive days, the observations document tilted, vertically coherent precipitation, vorticity, and updraft structures in response to the complex shearing flows impinging on and occurring within the disturbance near 18 north latitude. The observations and analyses herein suggest that the low‐level circulation of the pre‐depression disturbance was enhanced by the coupling of the low‐level vorticity and convergence in these deep convective structures on the meso‐gamma scale, consistent with recent idealized studies using cloud‐representing numerical weather prediction models. Further examination of these new observations is needed to quantify the relative role of these vortical convection features in the tropical cyclone spin up process.
Geophys. Res. Lett., 37, L06802The article of record as published may be located at http://dx.doi.org/10.1029/2009GL042313, 2010
Showing items related by title, author, creator and subject.
Jeffries, Richard Allen. (Monterey, California. Naval Postgraduate School, 1995-03);An interactive tropical wind analysis technique is developed that combines the best features of the automated and subjective analyses over a limited region. An automated, large-scale analysis is used as a first-guess field. ...
Impacts of potential aircraft observations on forecasts of tropical cyclones over the western North Pacific Mitchell, Mark C. (Monterey, California. Naval Postgraduate School, 2014-12);A goal of The Observing System Research and Predictability Experiment (THORPEX) Pacific Asian Regional Campaign (T-PARC) that was conducted in 2008 over the western North Pacific was to examine the targeted observation for ...
Zhou, Hong; Kang, Wei; Krener, Arthur; Wang, Hongyun (2010);We apply the observability rank condition to study the observability of various viscoelastic fluids under imposed shear or extensional flows. In this paper the observability means the ability of determining the viscoelastic ...