Lanagan Thomas

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  • Technical Report
    UCTD and EcoCTD Observations from the CALYPSO Pilot Experiment (2018): Cruise and Data Report
    (Woods Hole Oceanographic Institution, 2019-01) Dever, Mathieu ; Freilich, Mara ; Hodges, Benjamin A. ; Farrar, J. Thomas ; Lanagan, Thomas ; Mahadevan, Amala
    From May 27, 2018 to June 02, 2018, a scientific campaign was conducted in the Alboran Sea as part of an ONR Departmental Research Initiative, CALYPSO. The pilot cruise involved two ships: the R/V Socib, tasked with sampling fixed lines repeatedly, and the NRV Alliance that surveyed along the trajectory of Lagrangian platforms. A large variety of assets were deployed from the NRV Alliance, with the objective to identify coherent Lagrangian pathways from the surface ocean to interior. As part of the field campaign, an Underway-CTD (UCTD) system was used to measure vertical profiles of salinity, temperature and other properties while steaming, to achieve closely spaced measurements in the horizontal along the ship's track. Both a UCTD probe and an biooptically augmented probe, named EcoCTD, were deployed. The EcoCTD collects concurrent physical and bio-optical observations. This report focuses exclusively on the data collected by these two underway systems. It describes th e datasets collected during the pilot cruise, as well as the important processing steps developed for the EcoCTD.
  • Article
    EcoCTD for profiling oceanic physical-biological properties from an underway ship
    (American Meteorological Society, 2020-05-08) Dever, Mathieu ; Freilich, Mara ; Farrar, J. Thomas ; Hodges, Benjamin A. ; Lanagan, Thomas ; Baron, Andrew J. ; Mahadevan, Amala
    The study of ocean dynamics and biophysical variability at submesoscales of O(1) km and O(1) h raises several observational challenges. To address these by underway sampling, we recently developed a towed profiler called the EcoCTD, capable of concurrently measuring both hydrographic and bio-optical properties such as oxygen, chlorophyll fluorescence, and optical backscatter. The EcoCTD presents an attractive alternative to currently used towed platforms due to its light footprint, versatility in the field, and ease of deployment and recovery without cranes or heavy-duty winches. We demonstrate its use for gathering high-quality data at submesoscale spatiotemporal resolution. A dataset of bio-optical and hydrographic properties, collected with the EcoCTD during field trials in 2018, highlights its scientific potential for the study of physical–biological interactions at submesoscales.
  • Dataset
    Tag attachment device on a pole (TADpole)
    (Woods Hole Oceanographic Institution, 2024-01-23) Lanagan, Thomas ; Kapit, Jason ; Moore, Michael J.
    To attach satellite-linked telemetry tags to bow-riding and surface swimming large marine vertebrates such as dolphins and sharks, a pole mounted, pneumatically powered tool has been developed. It uses the proven single-pin dorsal fin attachment method.