Robust mapping of tropical cyclone wave fields using HF skywave radar

2002 ◽  
Author(s):  
S.J. Anderson
Keyword(s):  
Tropical Cyclone ◽  
Wave Fields

scholarly journals The effects of tropical cyclone characteristics on the surface wave fields in Australia's North West region

2017 ◽  
Vol 139 ◽  
pp. 35-53 ◽  
Author(s):  
Edwin J.F. Drost ◽  
Ryan J. Lowe ◽  
Greg N. Ivey ◽  
Nicole L. Jones ◽  
Christine A. Péquignet
Keyword(s):  
Surface Wave ◽  
Tropical Cyclone ◽  
Wave Fields ◽  
North West ◽  
West Region

Observations of surface wave fields in the Arabian Sea under tropical cyclone Tauktae

2021 ◽  
Vol 242 ◽  
pp. 110097
Author(s):  
P.R. Shanas ◽  
V. Sanil Kumar ◽  
Jesbin George ◽  
Duphrin Joseph ◽  
Jai Singh
Keyword(s):  
Surface Wave ◽  
Tropical Cyclone ◽  
Arabian Sea ◽  
Wave Fields

scholarly journals Langmuir Turbulence under Hurricane Gustav (2008)

2015 ◽  
Vol 45 (3) ◽  
pp. 657-677 ◽  
Author(s):  
Tyler J. Rabe ◽  
Tobias Kukulka ◽  
Isaac Ginis ◽  
Tetsu Hara ◽  
Brandon G. Reichl ◽  
...  
Keyword(s):  
Tropical Cyclone ◽  
Vertical Velocity ◽  
Stokes Equations ◽  
Surface Wind ◽  
Upper Ocean ◽  
Langmuir Turbulence ◽  
Ocean Turbulence ◽  
Wave Fields ◽  
Research Division ◽  
Budget Analysis

AbstractExtreme winds and complex wave fields drive upper-ocean turbulence in tropical cyclone conditions. Motivated by Lagrangian float observations of bulk vertical velocity variance (VVV) under Hurricane Gustav (2008), upper-ocean turbulence is investigated based on large-eddy simulation (LES) of the wave-averaged Navier–Stokes equations. To realistically capture wind- and wave-driven Langmuir turbulence (LT), the LES model imposes the Stokes drift vector from spectral wave simulations; both the LES and wave model are forced by the NOAA Hurricane Research Division (HRD) surface wind analysis product. Results strongly suggest that without LT effects simulated VVV underestimates the observed VVV. LT increases the VVV, indicating that it plays a significant role in upper-ocean turbulence dynamics. Consistent with observations, the LES predicts a suppression of VVV near the hurricane eye due to wind-wave misalignment. However, this decrease is weaker and of shorter duration than that observed, potentially due to large-scale horizontal advection not present in the LES. Both observations and simulations are consistent with a highly variable upper ocean turbulence field beneath tropical cyclone cores. Bulk VVV, a TKE budget analysis, and anisotropy coefficient (ratio of horizontal to vertical velocity variances) profiles all indicate that LT is suppressed to levels closer to that of shear turbulence (ST) due to misaligned wind and wave fields. VVV approximately scales with the directional surface layer Langmuir number. Such a scaling provides guidance for the development of an upper-ocean boundary layer parameterization that explicitly depends on sea state.

scholarly journals Evaluation of Wave Forecasts Consistent with Tropical Cyclone Warning Center Wind Forecasts

2013 ◽  
Vol 28 (1) ◽  
pp. 287-294 ◽  
Author(s):  
Charles R. Sampson ◽  
Paul A. Wittmann ◽  
Efren A. Serra ◽  
Hendrik L. Tolman ◽  
Jessica Schauer ◽  
...  
Keyword(s):  
Tropical Cyclone ◽  
Tropical Cyclones ◽  
Wind Field ◽  
Weather Prediction ◽  
Surface Wind ◽  
Track Forecast ◽  
Surface Winds ◽  
Wave Fields ◽  
Wavewatch Iii ◽  
Surface Wind Field

Abstract An algorithm to generate wave fields consistent with forecasts from the official U.S. tropical cyclone forecast centers has been made available in near–real time to forecasters since summer 2007. The algorithm removes the tropical cyclone from numerical weather prediction model surface wind field forecasts, replaces the removed winds with interpolated values from surrounding grid points, and then adds a surface wind field generated from the official forecast into the background. The modified wind fields are then used as input into the WAVEWATCH III model to provide seas consistent with the official tropical cyclone forecasts. Although this product is appealing to forecasters because of its consistency and its superior tropical cyclone track forecast, there has been only anecdotal evaluation of resulting wave fields to date. This study evaluates this new algorithm for two years’ worth of Atlantic tropical cyclones and compares results with those of WAVEWATCH III run with U.S. Navy Operational Global Atmospheric Prediction System (NOGAPS) surface winds alone. Results show that the new algorithm has generally improved forecasts of maximum significant wave heights and 12-ft seas’ radii in proximity to tropical cyclones when compared with forecasts produced using only the NOGAPS surface winds.

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