The Applied Ocean Physics and Engineering Department (AOPE) is a unique collection of scientists, engineers, technical support personnel and students conducting research into ocean processes from the turbulent surf zone to the abyssal depths. This research encompasses air-sea interaction on local and global scales, mixing processes, sediment transport, estuarine and coastal hydrodynamics, ocean acoustics, underwater communication, internal waves, signal processing, mooring dynamics, and physical-biological processes.
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Spatial mapping of dissolved methane using an in situ sensor in Puget Sound
Spatial mapping of dissolved methane using an in situ sensor in Puget Sound
Aug 11, 2025
Michel, Anna, 2025, "Spatial mapping of dissolved methane using an in situ sensor in Puget Sound", https://doi.org/10.26027/DATAZAL2SC, MBLWHOI Library Dataverse, V1
Release of methane, as gas bubbles or in the dissolved phase, from the seafloor has been observed in coastal waters (<200 m) and deep ocean basins (>1000 m). Methane dissolution within the water column affects the geochemistry of the surrounding water, leading to localized oxygen loss and ocean acidification. Traditional methods for detecting and q...
A Refractometer for Measuring Thermohaline Density Microstructure in the Ocean
Jul 21, 2025
Jason Kapit; Farr, Norman; Schmitt, Raymond, 2025, "A Refractometer for Measuring Thermohaline Density Microstructure in the Ocean", https://doi.org/10.26027/DATAVI1X45, MBLWHOI Library Dataverse, V1, UNF:6:epQsmNnadTTL3W7CWhGEyA== [fileUNF]
Here we report an optical sensor for measuring millimeter-scale thermohaline density variations in the ocean. The instrument is based on a fiber Fabry-Perot white light interferometer which can resolve the refractive index of water to better than 2 x 10-8 within a sample volume smaller than 1 mm3 at a sample rate of 500 Hz. This equates to detectab...
An Underwater Methane Sensor Based on Laser Spectroscopy in a Hollow Core Optical Fiber
Jul 21, 2025
Jason Kapit; Youngs, Sarah; Pardis, William A.; Padilla, Alexandra M.; Michel, Anna, 2025, "An Underwater Methane Sensor Based on Laser Spectroscopy in a Hollow Core Optical Fiber", https://doi.org/10.26027/DATAPTD8ZF, MBLWHOI Library Dataverse, V1, UNF:6:S+yqkS17186lU0QS3EbOOA== [fileUNF]
Existing sensors for measuring dissolved methane in situ suffer from excessively slow response times or large size and complexity. The technology reported here realizes improvements by utilizing a hollow core optical fiber (HFC) as the detection cell in an underwater infrared laser spectrometer. The sensor operates by using a polymer membrane inlet...
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