Infrasonic ambient noise interferometry from correlations of microbaroms
Geophysical Research Letters
By: M.M. Haney
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Abstract
We show that microbaroms, continuous infrasound fluctuations resulting from the interaction of the ocean with the atmosphere, have long-range correlation properties that make it possible to estimate the impulse response between two microphones from passive recordings. The processing is analogous to methods employed in the emerging field of ambient noise seismology, where the random noise source is the ocean coupling with the solid Earth (microseisms) instead of the atmosphere (microbaroms). We find that time-dependent temperature fields and temperature inversions determine the character of infrasonic impulse responses at Fourpeaked Volcano in Alaska. Applications include imaging and monitoring the gross structure of the Earth's atmospheric boundary layer. Copyright 2009 by the American Geophysical Union.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Infrasonic ambient noise interferometry from correlations of microbaroms |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/2009GL040179 |
| Volume | 36 |
| Issue | 19 |
| Year Published | 2009 |
| Language | English |
| Contributing office(s) | Volcano Hazards Program |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Geophysical Research Letters |
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