scholarly journals Revisiting gradient wind balance in tropical cyclones using dropsonde observations

2020 ◽  
Author(s):  
Jorge L. García‐Franco ◽  
Juliane Schwendike
Keyword(s):  
Tropical Cyclones ◽  
Gradient Wind

scholarly journals On the violation of gradient wind balance at the top of tropical cyclones

2017 ◽  
Vol 44 (15) ◽  
pp. 8017-8026 ◽  
Author(s):  
Yair Cohen ◽  
Nili Harnik ◽  
Eyal Heifetz ◽  
David S. Nolan ◽  
Dandan Tao ◽  
...  
Keyword(s):  
Tropical Cyclones ◽  
Gradient Wind

scholarly journals Gradient Wind Balance in Tropical Cyclones in High-Resolution Global Experiments

2014 ◽  
Vol 142 (5) ◽  
pp. 1908-1926 ◽  
Author(s):  
Yoshiaki Miyamoto ◽  
Masaki Satoh ◽  
Hirofumi Tomita ◽  
Kazuyoshi Oouchi ◽  
Yohei Yamada ◽  
...  
Keyword(s):  
Tropical Cyclones ◽  
Tangential Velocity ◽  
Vertical Direction ◽  
Lower Troposphere ◽  
Mesh Size ◽  
Global Scale ◽  
Cumulus Parameterization ◽  
Left Hand ◽  
Gradient Wind ◽  
Axisymmetric Structure

Abstract The degree of gradient wind balance was investigated in a number of tropical cyclones (TCs) simulated under realistic environments. The results of global-scale numerical simulations without cumulus parameterization were used, with a horizontal mesh size of 7 km. On average, azimuthally averaged maximum tangential velocities at 850 (925) hPa in the simulated TCs were 0.72% (1.95%) faster than gradient wind–balanced tangential velocity (GWV) during quasi-steady periods. Of the simulated TCs, 75% satisfied the gradient wind balance at the radius of maximum wind speed (RMW) at 850 and at 925 hPa to within about 4.0%. These results were qualitatively similar to those obtained during the intensification phase. In contrast, averages of the maximum and minimum deviations from the GWV, in all the azimuths at the RMW, achieved up to 40% of the maximum tangential velocity. Azimuthally averaged tangential velocities exceeded the GWV (i.e., supergradient) inside the RMW in the lower troposphere, whereas the velocities were close to or slightly slower than GWV (i.e., subgradient) in the other regions. The tangential velocities at 925 hPa were faster (slower) in the right-hand (left hand) side of the TC motion. When the tangential velocities at the RMW were supergradient, the primary circulation tended to decay rapidly in the vertical direction and slowly in the radial direction, and the eyewall updraft and the RMW were at larger radii. Statistical analyses revealed that the TC with supergradient wind at the RMW at 850 hPa was characterized by stronger intensity, larger RMW, more axisymmetric structure, and an intensity stronger than potential intensity.

A simple gradient wind field model for translating tropical cyclones

2017 ◽  
Vol 88 (1) ◽  
pp. 651-658 ◽  
Author(s):  
Cao Wang ◽  
Hao Zhang ◽  
Kairui Feng ◽  
Quanwang Li
Keyword(s):  
Tropical Cyclones ◽  
Wind Field ◽  
Field Model ◽  
Wind Field Model ◽  
Gradient Wind

Real-Time Forecasting System of Winds, Waves and Surge in Tropical Cyclones

2003 ◽  
Author(s):  
Hans C. Graber ◽  
Mark A. Donelan ◽  
Michael G. Brown ◽  
Donald N. Slinn ◽  
Scott C. Hagen ◽  
...  
Keyword(s):  
Real Time ◽  
Tropical Cyclones ◽  
Forecasting System
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