June 2025

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Oceanography | Vol. 38, No. 2

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multi-platform network acquired soundscape, acoustic back­

scatter, oceanographic, and space-based remote sensing data

that supported high-resolution time series analysis, soundscape

modeling, and ecological modeling to better understand eco­

system dynamics and human use in an under-sampled region.

The development of the ALTO lander during the ADEON pro­

gram has successfully demonstrated its utility for transloca­

tion to numerous other national and international monitoring

efforts. ADEON standardization and visualization products are

now being used globally to explore and compare acoustic data­

sets acquired in different geographical regions and with different

hardware systems. Our results indicated that marine mammal

use of the OCS is more complex than previously documented.

Beaked whale species were observed to exhibit site fidelity along

the OCS, and the offshore area of the Blake Plateau was iden­

tified as a hotspot for minke whales during the mating season.

Advances in soundscape modeling illustrated that the presence

of individual ships significantly impacts the measured and mod­

eled soundscape across the OCS and that acoustic energy is

greater at the seafloor compared to the surface in the ADEON

region. Continuous measures of predator foraging activity and

prey biomass and distribution across multiple years is rare out­

side of a coastal setting and has proven valuable for predic­

tive modeling of predator presence in changing environmen­

tal conditions. Lastly, the partnerships established during the

ADEON program, including the artist-at-sea program, posi­

tive interactions with commercial fisherman, and collabora­

tion with the Ocean Tracking Network and NOAA’s National

Centers for Environmental Information (NCEI), continue to

highlight the value of ocean acoustics, marine science, and sci­

entific research to society.

FIGURE 7. The ADEON visualization suite allows users to explore the overlap of regional acoustic measurements, modeling, and remote

sensing. (a) Main map interface, showing ADEON regional area, modeled ship noise contribution to soundscape, lander locations, and

probe interface windows opened for two landers. Users can select from multiple environmental overlays in the interface window. (b) Tri-level

spectrogram viewer interface showing an approximate week (top), day (middle), and hour (bottom). The different time scales highlight spe­

cific sources contributing to the soundscape. A vessel passage is captured in the day scale, and a selected whale call is highlighted at the

hourly level for user playback and download. (c) Event detection heatmap interface, showing cyclic visualization of dolphin click events over

multiple years stacked on top of each other, with a concentration during the nighttime hours, and contributions from a single year high­

lighted. The colored sea surface temperature (SST) data are time aligned with the marine mammal detections. (d) Deviations viewer, show­

ing times and frequency ranges where it was unusually quiet or loud based on analysis by adjustable-duration moving window.

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