Extreme Waves Under Hurricane Ivan
David W. Wang*,
Douglas A. Mitchell,
William J. Teague,
Ewa Jarosz and
Mark S. Hulbert
Naval Research Laboratory, Stennis Space Center, MS 39529, USA.
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Fig. 1. (A) Satellite image of Hurricane Ivan from the Moderate Resolution Imaging Spectroradiometer (MODIS) at 1850 universal time, 15 September 2004 (provided by NRL's Ocean Optics Group). The eye of Hurricane Ivan is clearly shown just southeast of the boot of Louisiana. NRL moorings are shown as blue dots [northern line (60 m), moorings 1, 2, and 3; southern line (90 m), moorings 4, 5, and 6]. The NDBC buoy is shown as a red circle, and the track of Hurricane Ivan is shown as a green dashed line with squares marking the hurricane's center every 3 hours. (Inset) Location of Ivan at the time of measurement. (B) Time evolution of Hs (circles) and Hmax (crosses) for the six NRL moorings, Hs for NDBC buoy 42040 (dotted line), and radial distance to Ivan's center (squares). (C) Hs and Hmax as a function of normalized radial distance (r/R). The red dashed line represents the exponential relation (Eq. 1); digitized values of a segment 15° clockwise from the forward direction of a numerically simulated wave field are denoted by black asterisks. The blue dashed line represents Hmax = 1.9Hs, and circles and crosses are as in (B).
[View Larger Version of this Image (54K GIF file)]
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