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SMILE - 2017 - Oceanus

Project Title:	Submesoscale Mixed-Layer Dynamics: Isolating the Sub- and Super-inertial	Project Status:	Submitted
Principal Investigator:	James B. Girton, UW_APL	Project Institution:	UW_APL
Project ID:	104724	Version #:	2
Date Submitted:	2/11/2015 6:05:00 AM	Created By:	James B. Girton
Date Last Modified:	8/19/2016 9:58:00 PM	URI Serial #:	None
Funding Agencies:	NSF/OCE/PO - 1536314 - Funded
Summary of Field Work:	The Submesoscale MIxed-Layer Experiment (SMILE) will be aimed at increasing our understanding of the role of lateral processes in mixed-layer dynamics through a series of ship surveys and Lagrangian array deployments targeting the upper-ocean’s adjustment to winter atmospheric forcing events. The SWIMS (shallow-water integrated mapping system) towed profiler will be used to make high-resolution surveys of upper-ocean temperature, salinity, oxygen, and fluorescence. EM-APEX (electromagnetic profiling explorer) profiling floats will measure temperature, salinity, temperature microstructure, and horizontal currents in clusters of up to 20 floats at a time. In addition, a drifting surface buoy will measure winds and atmospheric fluxes. The measurements will span 1–10 km scales, with floats making profiles every ½ hour to 100 m depth. We expect to make 5–7 deployments and recoveries, each 3–5 days in duration, over the course of a 28-day cruise in early 2017. The proposed location is the North Pacific Subtropical Front, approximately 800 km north of Hawaii.
Summary of Facility Requirements:	We are requesting a global or ocean-class ship suitable for intensive over-the-side operations deploying and recovering EM-APEX profiling floats, cycling the SWIMS tow-body, and deploying and recovering the WHOI surface buoy. At a minimum, deck space for the surface flux buoy and for the SWIMS tow winch are required, in addition to the ability to deploy each while the other is on deck. Because both high-resolution and long-range ADCP currents are critical to the science, high-quality ADCP data quality is required, and the ability to install an additional ADCP (either 300 KHz Workhorse or 150 KHz broadband) in a spare transducer well is desired. Finally, EM-APEX recoveries are quicker and safer from a small boat than from the large vessel, so we are requesting a dedicated work boat (i.e., not needed for safety) for this purpose (to be used when weather permits).
Summary of other requirements and comments:	Our initial request specified the R/V Thomas G. Thompson because of the availability of a multi-depth flow-through Temperature and Salinity measurement system installed by APL investigators Andy Jessup and Bill Asher. As the Thompson will be in dry dock during our field work, our second choice is the R/V Roger R. Revelle, which has a similar multi-depth CTD intake system. Third and fourth options include the R/V Oceanus and R/V Sally Ride (although the performance and suitability of the latter is not yet well known). Because of ADCP data quality concerns and the difficulty of over-the-side operations (respectively), we do not feel the R/V Sikuliak and R/V Kilo Moana to be viable alternatives for this project.

Type of Request:	Primary Ship Use	Request Status:	Submitted
Request ID:	1007547	Created By:	James B. Girton
Date Last Modified:	8/19/2016 9:58:00 PM	Date Submitted:	2/11/2015 6:05:00 AM

Year:	2017	Ship/Facility:	Oceanus
Optimum Start Date:	3/1/2017	Dates to Avoid:	March preferred (see below)

Earliest Start Date:	1/1/2017	Multi-Ship Op:	No
Latest Start Date:	4/1/2017	Other Ship(s):	Oceanus only


Operating Days Needed:	Science Days	Mob Days	De-Mob Days	Estimated Transit Days	Total Days
	24	3	1	4	32
Repeating Cruise? (within same year)	No	Interval:		# of Cruises:

Description of Repeating cruise requirements:			We are requesting 28 days at sea for this cruise. With an estimated transit of 2 days each way, this leaves 24 science days.
Justification/Explanation for ship choice, dates, conflicts, number of days & multi-ship operations:			1) A 28 day cruise is requested to allow sufficient time to accomplish the scientific goals of observing multiple realizations of submesoscale mixed layer structures and adjustment to atmospheric forcing. Significant weather events are expected to occur every 3-5 days, and observations must be made over multiple inertial periods (1 day each). Thus we expect to be able to sample 5-8 events. 2) While a large Thompson/Revelle-class ship would be advantageous to allow switching among the multiple science activities planned: EM-APEX float deployment and recovery; drifting surface flux buoy deployment and recovery; and SWIMS tow-yo surveys, the ocean-class R/V Oceanus has adequate berthing and deck space to accommodate our needs in this experiment. 3) An additional advantage of the low-freeboard swell-following Oceanus is the easier access to small floating instruments (EM-APEX profiling floats) for recovery via a lifting line attached to a snap-hook on a pole. We anticipate conducting approximately 100 of these recoveries over the course of the experiment. 4) The experiment dates are motivated principally by the expected amplitude of atmospheric forcing and restratification processes in the Subtropical Front north of Hawaii. Late winter (Jan-April) is the best time to observe these processes. March is optimal because of the additional probability of calmer periods to allow array recovery and redeployment.

Short Description of Op Area for use in schedules:	N Pacific STF
Description of Op Area:	The Subtropical Front is roughly 800 km north of Hawaii. The specific experiment location will be selected on the basis of satellite data in the region 147-159 W, 25-33 N immediately prior to the cruise, then refined on the basis of in-situ observations. We expect to operate within a roughly 200 km square region over the course of the cruise.
Op Area Size/Dia.:	100

	Lat/Long	Marsden Grid	Navy Op Area
Beginning	33° N / 159° W map 33° 0' N / 159° 0' W map	124 map	NP08 map
Ending	25° N / 147° W map 25° 0' N / 147° 0' W map	87 map	NP12 map
	Show Degrees Minutes

Foreign Clearance Required?	No	Coastal States:
Important Info on Foreign Research Clearances
Are you or any member in your science party bringing in any science equipment items which are regulated for export by the International Traffic in Arms Regulations (ITAR) and/or the Export Administration Regulations (EAR)?	No	If yes, have you applied for the necessary permits through your export control office?	No
Questions about ITAR/EAR regulations?
Comments about foreign clearance requirements or description of any other special permitting requirements (e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.)	none

Requested Start Port	Intermediate Port(s)	Requested End Port
Honolulu, HI, USA	None, , None,	Honolulu, HI, USA
Explanation/justification for requested ports and dates of intermediate stops or to list additional port stops	Honolulu is the closest, most capable port
Important Info on Working in Foreign Ports

Chief Scientist:		James B. Girton, UW_APL
# in Science Party	13	# of different science teams	1	# Marine Technicians to be provided by ship operator: (include in science party total)	1
Explanation of Science Party Requirements and Technician Requirements		We expect to conduct round-the-clock EM-APEX and SWIMS operations, working in shifts. SWIMS launch and recovery requires approximately 6 people, as does launch and recovery of the drifting surface buoy. The 12-person science party will be made up of personnel from APL-UW, WHOI, and NWRA. Assistance from a shipboard technician will be needed for maintenance and quality control of shipboard instrumentation (ADCP, CTD, Thermosalinograph), as well as for launch and recovery of profiling floats. EM-APEX operations will use a small crane or A-frame block and the science party's quick-release and recovery hooks.

Dynamic Positioning	ADCP	Multibeam	Seismic
Dredging/Coring/Large Dia. Trawl Wire	Stern A-frame	Fiber Optic (.681)	0.680 Coax Wire
SCUBA Diving	Radioisotope use - briefly describe	NO Radioisotope use/Natural level work	Other Operator Provided Inst. - Describe
0 PI-Provided Vans - briefly describe	MOCNESS

Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling.

Because EM-APEX recoveries are quicker and safer from a small boat than from the large vessel, we request the use of a work boat that can be dedicated for this purpose (i.e., not required standing by for safety). The small boat will be used for EM-APEX recoveries whenever weather and sea state permit.
We also are likely to want to install our own 150 KHz broadband ADCP in a spare transducer well for higher resolution currents in the upper water column than available from the 75 KHz ship system (and longer range than the 300 KHz). If necessary, this could be swapped for the 300.
Finally, we anticipate a small number of CTD casts (roughly 1 per day) with a rosette water sampler for calibration of the SWIMS sensors.

Aircraft
Helicopter Ops (USCG)	Twin Otter	Unmanned Aerial Systems (UAS)
Autonomous Underwater Vehicle (AUV)
Other AUV	Sentry
Coring Facility
Jumbo Piston Coring	Large Gravity Core	MC800 multicorer w/ MISO camera/telemetry	OSU Coring Facility (MARSSAM)
Other Large Coring Facility	WHOI Long Core
Human Occupied Vehicle (HOV)
Alvin	Clelia (HBOI)	JSL I & II (HBOI)	Other HOV
Other Facility
MISO Facility - deep-sea imaging	Other Facility	Potential Fields Pool Equipment
Remotely Operated Vehicle (ROV)
Jason	Other ROV
Seismic Facility
Ocean Bottom Seismograph Instrument Center (OBSIC)	Ocean Bottom Seismograph Instrument Pool (OBSIP)	Ocean-Bottom Seismometer Program (UTIG)	Other Seismic/OBS Facility
PASSCAL	Portable MCS group	Portable MCS/SCS group	U.S. Geological Survey Ocean Bottom Seismometer Facility (USGS at WHOI)
Towed Underwater Vehicle
ARGO II	Hawaii MR1 (HMRG)	IMI12 (HMRG)	IMI120 (HMRG - formerly DSL 120A)
IMI30 (HMRG)	Other Towed Underwater Vehicle	Towfish
UNOLS Van Pool
AUV Lab Van #1	Clean Lab Van	Cold Lab Van	General Purpose Lab Van
Radioisotope Lab Van	Wet Lab Van
UNOLS Winch Pool
Mooring Spooler	Portable Winch	Turn Table

Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems.

SWIMS winch will need to be installed

Associated Schedules

Ship Request History