Welcome

The Ocean Acoustics and Dynamics Laboratory is a group with interests linking acoustic propagation physics and ocean dynamics with a focus on using acoustic propagation observations, ocean medium measurements, theory, and modeling to infer wave physics (the forward problem) and/or properties of the medium (the inverse problem). Undersea remote sensing, navigation, and communication are some common applications of this work.

The lab has very close ties to the Scripps Institution of Oceanography (SIO), Acoustical Oceanography Group who carry out the precisely timed and navigated acoustical observations that are necessary for this kind of work. The group has interests in processes from turbulence scales, to internal waves, to eddies, and even climate scales. Regions in which recently done field work has been carried out are, the Philippine Sea, the Beaufort Sea, the continental shelf off Point Conception California, the Eastern Arctic (Nansen and Amundson Basins), and the New England Seamounts approximately 400-miles east of Cape Cod in the Gulf Stream.

Principal Investigator


Dr. John Colosi is the Principal Investigator and leader of the OC Acoustics Lab. Read CV.
  • Education:
  • PhD Physics, UC Santa Cruz, 1993
  • BS Physics, UC San Diego, 1988
  • Present Positions:
  • Professor, Department of Oceanography, Naval Postgraduate School, 2009-present
  • Adjunct Professor, Department of Ocean Sciences, UC Santa Cruz, 2021-present

Personnel


John Colosi
John Colosi
Prinicipal Investigator and Professor
Oceanography
Chiu
Ching Sang Chiu
Emeritus Professor
Oceanography
Chris Miller
Chris Miller
Research Associate
Oceanography
Dr. Edward (Ned) Richards
Dr. Edward (Ned) Richards
Postdoc UCSC
Oceanography
Alejandra Sanchez-Rios
Alejandra Sanchez-Rios
Postdoc SIO co-advised with Jen MacKinnon
Oceanography
Murat Kucukosmanoglu
Murat Kucukosmanoglu
PhD Student UCSC (graduated Summer 2022)
Oceanography

Projects


Canape

Canada Basin Acoustic Propagation Experiment (CANAPE)

Funded by the Office of Naval Research, the Naval Postgraduate School teamed with the Scripps Institution of Oceanography and the Woods Hole Oceanographic Institution in a field experiment abord the USCGC Healy to deploy deep-water moorings in the Beaufort Sea.

With changes in the Arctic Ocean structure and ice cover, the Canada Basin Acoustic Propagation Experiment (CANAPE) deep water comoponent was designed to study the low frequency propagation and ambient noise in the seasonal conditions of open water, marginal ice zone / partial coverage, and complete ice coverage conditions throughout the 2016-2017 study period.   Ongoing data analysis of the arctic propagation continues.

Funded by the Office of Naval Research. Contact: Prof. John Colosi for potential thesis opportunities.

Canada Basin Mooring locations

Nescafe

 

New England Seamounts Calibrated Acoustic Fluctuations Experiment (NESCAFE)

 

Atlantis II Seamounts map image.  Data courtesy of NGDC Undersea Feasture Names Gazetteer

Atlantis II Seamounts map image.  Data courtesy of NGDC Undersea Feasture Names Gazetteer

Located in the dynamic currents of the Gulf Stream, Southeast of Georges Bank, the New England Seamounts provide a challenging environment for studying acoustic variability, signal detection, localization and tracking in a high turbidity region with complex topography.

Beginning 2022,  environmental mooring were deployed at the Atlantis II seamounts to begin characterizing the ocean environmental conditions (temperature, salinity, currents vs. depth & time), with Spring 2023 pilot experiment and larger 2024 main experiment efforts.

Funded by the Office of Naval Research, part of the Task Force Ocean, Department Research Initiative.   Contact: Prof. John Colosi for potential thesis opportunities.