Modeling and Characterization of Microbarom Signals in the PacificDr. Milton Garces, Primary Investigator, Dept. of Geophysics and Planetology, University of Hawaii |
Fig. 1. Hurricane
Daniel as seen by GOES 10 on July 26, 2000. ISLA will attempt to accurately
depict the wind/wave field produced by Hurricane Daniel in order to model
microbaroms produced by the nonlinear interaction of Daniel's ocean surface
waves. | 
Fig. 2. Observed
infrasonic arrival azimuth for microbarom signals (0.1-0.5 Hz) in comparison
with azimuth from Hawaii to Hurricane Daniel's core (red line). (Click on image for larger display) |
Goals:
-
To investigate infrasound singal associated with sever weather in the Pacific
Ocean in the 0.1-0.4 Hz frequency range, detected at CTBT array IS59 located
above Kailua-Kona, Hawaii.
- To compare distinct infrasonic observations
resulting from severe weather with theoretical predictions from existing
source and propagation models.
Co-Investigators:
Dr. Steven Businger, University of Hawaii at Manoa
Funding:
$447,140
Contact:
businger@hawaii.edu
(808) 956-2569
Expected Results:
-
To develop a relationship between storm activity in the Pacific with infrasonic
detection in the 0.1-0.4 Hz band.
- To model microbaroms in the Pacific originating
from nonlinear ocean wave interactions from tropical cyclones and island
reflection.
| Importance:
- Project will complement the ongoing DTRA project titled "Characterization
of the Infrasonic Field in the Central Pacific", because it will allow a
more detailed study of a dominant signal in the 1 kt band.
- Analyzing infrasound produced by severe weather provides and additional means of remote sensing over the ocean.
Effort (Month)
| 1-6
| 7-12
| 13-15
| 15-18
|
| Comparison of atmospheric/oceanic data w/ observed infrasound
| 0-----------------
| Determine relationship between storm activity and microbarom detection
| -----0------------
| Modeling of microbaroms in the Pacific
| -----------------0
|
For more information see www.isla.hawaii.edu
|