Computer Science – Sound
Scientific paper
Oct 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3619808h&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 19, CiteID L19808
Computer Science
Sound
5
Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504), Atmospheric Processes: Boundary Layer Processes, Volcanology: Volcano Monitoring (7280), Volcanology: Atmospheric Effects (0370), Atmospheric Processes: Instruments And Techniques
Scientific paper
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.
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