Modeling and Characterization of Microbarom Signals in the Pacific
Dr. 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
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)
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.
Dr. Steven Businger, University of Hawaii at Manoa
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
- 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.
|Comparison of atmospheric/oceanic data w/ observed infrasound|
|Determine relationship between storm activity and microbarom detection|
|Modeling of microbaroms in the Pacific|
For more information see www.isla.hawaii.edu