The contours of nodal height cinomalies and surface currents at 

 1200 GMT 9 August are shown in Figs. 47-49. The inertio-gravity 

 waves in the baroclinic height anomaly (Fig. 48) seem to be 

 undetectable. Examination of this field at later times indicates 

 that only one-half wavelength of the wake oscillation is seen in Fig. 

 48. This agrees with the experimental results of Chang and Anthes 

 (1978) showing that the faster the storm moves the longer the 

 wavelength of the oscillation. The approximate half wavelength of 

 350 km is measured in this hurricane Allen simulation. 



The existence of tjq in the simulated hydrographs for Allen 

 prompted a repeat simulation of hurricane Carla with the added code 

 to determine tjq. Figure 50 shows the resulting time sequence of tjq 

 for Carla. The amplitude is smaller than the one associated with 

 hurricane Allen and the averaged period is about 24 h. The tjq signal 

 obtained from the Carla simulation once again shows up simultaneouly 

 in the individual hydrographs at stations around the Gulf. 



It is important to note that there is a correlation between the 

 jjq signal and the transport through both Florida and Yucatan Straits. 

 Figures 51 and 52 show the time series of the volume transport 

 through Florida Strait (FS), Yucatan Strait (YS), and the total 

 differential volume transport (unlabelled) as obtained from the 

 hurricane Carla and Allen simulations. The striking feature of the 

 differential transport is the periodicity. The average periods of 24 

 h and 28 h estimated from Figs. 51 and 52 are exactly the same as the 

 period of their corresponding tjq signals. In both cases, the rjg 



o 



signal lags the net transport by 90 in phase. The first maximum of 



93 



