+--------------------------------------------------------------------------+ | ATLANTIS CRUISE SYNOPSIS | +--------------------------------------------------------------------------+ Voyage - Leg: AT 15-21 Voyage Dates: 03-20 August, 2007 Chief Sci(s): Bill Chadwick (Embley/Di Iorio) Address: Embley - NOAA Pacific Marine Environmental Laboratory 2115 SE O.S.U. Dr. Newport, OR 97365-5258 Di Iorio - University of Georgia Department of Marine Sciences 250 Marine Sciences Building Athens GA 30602 *Chief Scientist TBN - Either William Chadwick or David Butterfield Phone: Chadwick - 541-867-0179 Embley - 431-867-0275 Di Iorio - 706-542-7020 Email: Chadwick - william.w.chadwick@noaa.gov Embley - robert.w.embley @noaa.gov Di Iorio - daniela @uga.edu Cruise Objective: Embley The NeMO seafloor observatory was established in 1997 to conduct time-series measurements of the physical, chemical, and biologic systems at an active submarine volcano. Annual expeditions to Axial Volcano since 1997 have documented important changes following a major eruption in January 1998. Remotely operated vehicles have been used to sample vent fluids, rocks, and biological material, and deploy and recover monitoring instruments on the seafloor. The 2007 program on Atlantis with Jason 2 will continue the time-series measurements and sampling. A mapping program with the MBARI AUV D. Allan B. was begun in 2006 will continue on NeMO 2007 with the primary goal of finishing a high resolution map of the caldera and the shallow parts of the north and south rift zones. This cruise will be operated jointly with the NSF-funded program of D. Di Iorio. The first few dives will be at the Endeavour Ridge vent fields to accommodate this program. Di Iorio Science Objectives: The main objective of this research is to measure continuously, for extended periods of time (> months) the along-valley tidally driven horizontal flow, and the buoyantly driven vertical flow and temperature fluctuations of hydrothermal vent fluid from either Hulk or Grotto vents in the Main Endeavour vent field (decision on the black smoker vent is dependent on NEPTUNE Canada integrated studies site). Measurements will be over an extended period of time so that comparisons can be made with independent seismic data collected by NOAA/PMEL. This will be accomplished by deploying an acoustic scintillation system within 50 m of the vent plume. Science Activities: Embley - ROV dives, deployment and recovery of seafloor instruments, AUV dives, maybe CTD casts and tows The primary scientific goals/tasks planned for NeMO 2007 include: At Endeavour: 1. Recover long-term time-series instruments from one site at Endeavour. 2. Conduct chemical, biological, and geological sampling at Main Endeavour and Mothra hydrothermal fields. 3. AUV mapping in Endeavour Axial Valley (if schedule permits) 4. High-resolution mapping of vent fields at Endeavour. At Axial: 1. conduct repeat pressure measurements with Jason on seafloor benchmarks, three transects during one ~36 hour dive. 2. Deployment of two seafloor chemical samplers (RAS) on small moorings for un-monitored, pre-programmed time series measurements at Endeavour and Axial. 3. Chemical, biological and microbiological sampling throughout Axial Volcano caldera, CASM, ASHES, and SE (International) vent fields. 4. Recovery of 2 bottom pressure recorders and 4 ocean bottom hydrophones at Axial Volcano and redeployment later during the cruise. 5. Recovery and re-deployment of temperature monitors at seafloor hot spring sites with Jason. 6. CTD/rosette casts at Axial Volcano. 7. Complete high resolution AUV mapping of summit of Axial Volcano DiIorio 1) Survey appropriate black smoker vent (either Hulk or Grotto) to determine the location of the scintillation transmitter mooring (Tx) and scintillation receiver mooring (Rx). Each will be placed approximately 50 m from the plume aligned perpendicular to the axial valley direction. Sample the plume temperature as a function of height (from the orifice to 25 m above). Video image the plume from the orifice to 25 m above. If a high frequency digital echosounder is available then obtain cross sectional imagery of the plume (see vehicle-related instrumentation section below). 2) Build the acoustic transmitter mooring (Tx) which will be approximately 35 m long with syntactic foam floatation. Deploy it at a drop location near either Hulk or Grotto vents. 3) Locate the Tx mooring (which will have a transponder coded appropriately so that it won't conflict with other beacons in the area) with Jason, using a homer probe. Lift the mooring (which will be <40 kg in water) from the top using the moorings' floating tag line and move it to the location identified in activity 1. 4) Build the Rx mooring with similar specifications as the Tx mooring described in 2) and 3) above. Deploy to a drop location where Jason can get it. 5) Move the Rx mooring to its location identified in activity 1. Operations Area: Embley Juan de Fuca Ridge: Endeavour and Axial Segments Vicinities of 48deg00'N;128deg08'W and 46deg00'N; 130deg00'W, respectiviely Di Iorio Main Eneavour vent field 47deg 56.88 N, 129deg 5.94W SSSG Tech: sssg @atlantis.whoi.edu Departure Port: Astoria, Oregon Agent: Master R/V Atlantis Attn: Scientist's Name c/o Ship Service Co. 968 Commercial St. Astoria, OR 97103 Contact: Lou Marconeri tel. (503) 325-3721 fax: (503) 325-4109 cell: (503) 791-0796 email: lmarconeri@knutsenins.com Send large packages to: R/V Ship Name Attn: Scientist's Name c/o Port of Astoria Foot of Portway Astoria, OR 97103 Arrival Port: Astoria, Oregon Agent: Same as above Installed 23X10L CTD/Rosette (~ 6 casts total for the cruise 1500-2,200m) Scientific -transmissometer on CTD (EC 2/17) Equipment: 12 & 3.5 kHz Transducers- Knudsen ADCP - 150 kHz (2/22 - JD) Seabeam collected on transits (EC 2/17) XBT System for Seabeam Deionized Water - 10-20 liters/day (2/22 - JD) Salinometer TBD if needed (EC 2/17) Pinger for wire use on CTD only Fume Hood Refrigerator -70 Deg Freezer Walk-In Cooler Walk-In Freezer MET - Standard Sensors WHOI-Provided Gravity Corer ?(JD 5/9) Science Tools: JASON Major Water Sampler Large Capacity Slurp Pump (Single & Multi-Chamber) Small Capacity Slurp Pump Bio Collection Box Push Cores Scoop Nets Temperature Probes (Di Iorio) CTD Digital Still Camera - Oriented Forward Search Sonar Profiling Sonar Video Duplication Doppler/GPS Navigation Program-Provided Embley Science Tools: (1) NOAA Hhydrothermal fluid and particle sampler (2) Lupton gas tight bottles both of these have have been used on J2, as recently as April-May, 2006 (3) Precision Pressure sensor (electrical etc. requiremnents to be supplied) MBARI AUV: AUV 1,500lbs 17' x 3', deployed with HIAB crane (13,00lbs) location TBD(EC 6/21) MBARI will use Atlantis deck crane to deploy AUV need access to trackpoint pole to install AUV transducer. requested davit and air tugger for transducer deploy/recover. Requested small boat as a backup to recover AUV Embley - one standard 20ft van, starboard side?, power needed, no water NO(EC 2/17) Shipboard Equipment/Nav: Other Elevators will not be needed (EC 2/17) Requirements: Transponder nets TBD (EC 2/17) High Def video camera. Details to be confirmed with Andy B. Tech required with camera (EC 2/17) Di Iorio - High frequency digital echosounder (acoustic backscatter instrumentation) for horizontal profiling through the hydrothermal vent plume would be needed if such a system exists for Jason. This instrumentation would be used to measure the cross sectional area of the hydrothermal plume at any given depth. Since the acoustic scintillation instrumentation will be deployed on either side of the plume it is crucial that the acoustic path between the transmitter and receiver propagates through the plume at approximately 20-25 m above the orifice. Notes: Night Work Anticipated Di Iorio - Acoustic Transmitter and Receiver moorings Each mooring weight in water is approximately 35-40 kg. Each mooring consists of syntactic foam float (30in, 250lbs buoyancy), acoustic scintillation RX (or TX) (63kg in water), Oceano acoustic release (22kg in water), anchor/chain (45 kg in water). Moorings will be deployed from the surface. DiIorio moorings will be deployed over the side by streaming out floatation then weights. Will need space on back deck to set up moorings. (EC 2/27) Embley - Equipment from all investigators will be loaded in Astoria between the July 31 and August 2. The MBARI AUV D. Allan B. will be secured on board. We will depart Astoria for our first site of ROV operations on the Endeavour segment of the Juan de Fuca ridge, working at hydrothermal fields located near 47*57'N, 129*05.7'W and 47*55.1'N, 129*06.75'W, at ~2200meters depth. These sites are within the Canadian EEZ. At the two Endeavour hydrothermal areas, we will deploy and recover instruments and conduct sampling operations as part of an ongoing observatory at the designated Integrated Studies Site. The primary work of Dr. Di Iorio's group will happen at this site. The MBARI AUV may be deployed at Endeavour if the schedule permits. Following approximately 3 days of work at the Endeavour site, we will transit to the NeMO site at Axial Volcano, at approximately 45* 57.3' N 130* 00.6' W. Axial Volcano is located in international waters. Operations at Axial will consist of a combination of instrument recovery and deployment, one long dive of approximately 36 hours for high-precision bottom pressure measurements, other shorter dives with chemical, biological, and geological sampling throughout the caldera, and mapping operations with the MBARI AUV. The MBARI AUV will be deployed and recovered between Jason2 dives, but the number and lengths of the AUV dives will depend on the operational parameters established for the D. Allan B. by summer of 2007 (e.g., whether the ship has to track the vehicle during the dives)After operations at Axial, we hope to also make one or more Jason2 dives to explore previously photographed hydrothermal vent sites on the Cobb Segment. Hazardous Material - Information to be supplied before cruise Loading plan (EC 6/21) 30 July to 2 Aug: Embley and DiIorio load their science gear. Deck gear includes: 7 pallets, 4 wire baskets, and AUV (1,500lbs, 17ft x3ft), instruments and space for mooring set up and deployment. Please note the position of mooring equipment on the Embley/DiIorio deck plan.(JD 7/6) [1]ftp://ftp.whoi.edu/pub/marine/cruisefiles/Cruise%20Info/ATLANTIS/AT15-21%20Embley%20DiIorio/General%20Info DiIorios mooring gear will go alongside the Jason parts van to be deployed during the first 2 days of the Embley cruise. The Jason parts van shoudl go as close to the Jason rigging van as possible. The starboard aft corner should remain open/clear for mooring setup and deployment. Under A-frame should also be clear for mooring gear. The Alvin tracks should be stored elsewhere. Embley will need the work boat on the main deck for recovery of the AUV. Work boat should be moved as far forward as possible to make room for AUV recovery but not to interfere with CTD ops. Starboard side Bollards fwd of crane will need to be removed to recover the AUV. Navy Clearance Status: Last Modified: 07/11/2007 Check List: Required? Comments US Customs Form No Explosives Clearance No Isotope Use Approval No Diplomatic Clearance Yes Canada SCUBA Diving No References Visible links 1. ftp://ftp.whoi.edu/pub/marine/cruisefiles/Cruise%20Info/ATLANTIS/AT15-21%20Embley%20DiIorio/General%20Info