Moored Mixing Measurements in PISTON
Abstract
This proposal addresses two important observational needs arising from the PISTONkickoff meeting in July 2016:~ extending time ser"ies observations, beyond the duration of necessarily shortshipboard campaigns and including the impacts of tropical cyclones that s""hipsmust evade, in order to resolve the full boreal summer season, therebymaximizing the likelihood of sampling multiple BSISO eve""nts, and~ enhancing ship observations to resolve the velocity structure of the diurnal jet,critical to the evolving dynamics of th"e diurnal warm layer.We address these needs as follows:Add moored ocean mixing measurements to the PISTON observational effort. Th"isobjective will be accomplished through construction of 20 ~pods to be deployed on twooceanographic moorings. These measurements,"" not included in our original proposal, willbe achieved through a restructuring of efforts by sea-going oceanographers within theP"ISTON PI group (see supporting letter from Scripps Institution of Oceanography PIs).The proposed moored mixing sensors will be adde"d to two moorings to be deployedoffshore of the Philippines spanning shallow to deep waters, allowing for measurementsthrough the" full season encompassing the BSISOs and including tropical cyclones.Enhance ship-based measurements of shear to resolve the ocean~"s near-surface, i.e., todepths capable of resolving the development of the diurnal jet (< 1m). This objective willbe met through t"he addition of multiple Doppler sonars and a GPS/navigational systemon a specialized steering board for towing outboard of the ship~s wake. We have madesignificant progress in measuring diurnal warm layer turbulence and stratification. Goodmeasurements of near-"surface velocity/shear have proven to be notoriously difficult. Ifsuccessful, these observations will be the first of their kind an"d may prove critical torefining parameterizations of upper ocean processes not yet resolvable in operationalcoupled models used for forecasting.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 03, 2017
- Source ID
- N000141713008
Entities
People
- E. Shroyer
Organizations
- Office of Naval Research
- Oregon State University
- United States Navy