Monthly Archives: April 2017

Ship ops teleconference notes – April/05/2017

Call minutes – Inner Shelf DRI ship ops (April/05/2017)

•Paul Chua will be on the Ride.

•One engineer from Jen’s group will be on the Sproul.

•Need to think about brief larger-scale surveys to help interpret the main experiment data.

•Falk’s + Matt’s NPS drifter deployments: Crosses with 5 drifters are good, other spatial arrangements may work too.

•Sproul can deploy drifters along the repeat track, drifter group can pick them up. Check with ResTechs/Capt. Tom if it is possible to transfer drifters from small boat back to Sproul to re- deploy them.

•Oceanus will be surveying < 50 m.

•OSU small boats can survey 10-15 m, depending on wave and weather conditions.

•Jen is interested in doing additional headland wake surveys (~1-2 days).

•Ken + Luc are interested in flow separation.

Jen’s comments:

 Need to divide the science goals in two categories: 1) Goals that can be achieved with
short night surveys between mooring deployments (or other short surveys), without
the need for coordinating multiple ships and 2) Goals that require more than one ship
at once for longer, say for a few days.

 Ship survey goals are:

1 Onshore soliton chasing.

2 Alongshore surveys.

3 Radiator surveys at a front.

4 Irregular coastline.

5 Others?

 Which of these will benefit significantly from concurrent aircraft + drifter + radar data?

 Which ones will benefit from model forecasts?

 Need to plan how much time, how many ships each will need, and rank them by priority.

teleconference notes – 5 April 2017

Inner Shelf DRI Monthly Meeting 2017-04-05

attendees: Chris Chickadel, Melissa Moulton, Gordon Farquharson, Joe Calantoni, David Honnegar, Nirnimesh Kumar, Falk, Ata Suanda, Matt Spydell, Jim Lerczak, Amy Waterhouse, Maarten Buijsman, Kevin Haas, Jack Barth, Chris Edwards, Jen McKinnon

Review and refine schedules for the IOPs in September/October. Please update the spreadsheet [1] with the latest information.
COAMPS runs input (Jamie). Questions from Jim Doyle:
Would the DRI benefit from real-time forecasts?
Should they be coupled to the ocean and/or waves?
How long of a period of time would you need real time forecasts?
Would the DRI need hindcast simulations?
Coupled or uncoupled?
What period of time?

OSU small boat, mooring deployment, dates? (Jack will add to the calendar)
SIO drifters, 12-19th intensive period, possible in second period (Falk will add to the calendar)
Ground-based radars to add to the calendar (David-Mick, Eric-Tony)
SIO aircraft, will they be there for the second survey (5-14 Oct)?
OSU Array turn-around time vs. survey?
Jen requests other ship-board scientists to contact her to participate in sampling and coordinating berths

Joe recommends Eric’s email re: COAMPS modeling
Table larger discussion until next meeting

Model output
fall 2009 6.5 months movies online (Matt Spydell)

Environmental Compliance
Please look at the spreadsheet with equipment to make sure everything is up to date (personnel, equipment, dates)
Falk will share link to spreadsheet again for review

2015 Surface Vorticity Movie

Movie of the surface (top ROMs bin) vertical vorticity for the 2015 simulation. The top panels are for the simulations without waves and the bottom panel are the simulations with waves. Leftmost panel is temperature anomaly on the 200m grid w/ 66m grid (black box) overlaid. 2nd column is the 200m vorticity with 66m overlaid. 3rd column is 66m vorticity with 22m grid (black box) vorticity overlaid. Rightmost panel is the tide (green), Hsig (black), mean enstrophy in the 66m grid with waves (red) and without waves (blue). Notice the large effect of wave coupling on the surface vorticity.

Full 2009 Model Simulation FTLE Movie

In planning for the drifter releases, Matt Spydell has put together this movie for the entire 2009 simulation: Aug 15 – Nov 15 using the 200m and 66 m (north and south) grids. The movie is long, you can speed it up 2x using the tools button.  The top panels are finite-time forward Lyupanov exponents for times at 2, 4, 6, and 10 hour trajectories with bathymetry contoured at 25 m intervals until 150 m depth and then 50 m intervals.  The bottom panels are vorticity, divergence, Okubo-Weiss parameter, and perturbation temperature all at the surface (top most ROMs bin).   In all bottom 4 panels the temperature deviation is contoured.   The fronts are really clearly visible.   The thick arrow indicates surface current off Pt Sal and a thin arrow indicates wind velocity (note, they are scaled differently).   We are using this information to plan our drifter releases.

scripps oceanography uc san diego