Open AccessSpectral wave modelling of Typhoon Krosa
Author(s) -
Alexander V. Babanin,
TaiWen Hsu,
Aron Roland,
ShanHwei Ou,
Dong Jiing Doong,
Chia Chuen Kao
Publication year - 2011
Publication title -
natural hazards and earth system sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.122
H-Index - 99
eISSN - 1684-9981
pISSN - 1561-8633
DOI - 10.5194/nhess-11-501-2011
Subject(s) - hindcast , typhoon , significant wave height , rogue wave , meteorology , climatology , wave model , diffraction , wave height , sensitivity (control systems) , geology , environmental science , wind wave , engineering , physics , optics , oceanography , nonlinear system , quantum mechanics , electronic engineering
This paper presents modelling the wave conditions in Typhoon Krosa prior to touching Taiwan in October 2007, with third-generation wave models of SWAN and WWM. The accuracy of the extreme wave measurement Hmax = 32 m with significant wave height Hs ≈ 24 m at the depth of h = 38 m is discussed first. It is concluded that the measurement does not appear faulty and is physically realistic. The numerical results are then analysed in order to examine the models' capability to reproduce the observed conditions. It is found that neither SWAN nor WWMII are able to hindcast the extreme measurement. Series of sensitivity tests are conducted for different numerical and diffraction schemes, and source functions. It is shown that, in the circumstances, the model performance only improves in response to the bottom-limited breaking formulation