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ECOHAB-PNW Mooring Report - 2004 Sue Geier Introduction The ECOHAB PNW: Ecology and Oceanography of Toxic Pseudo-nitzschia in the Pacific Northwest Coastal Ocean (ECOHAB) project was funded jointly by the National Science Foundation Division of Ocean Sciences and the National Oceanographic and Atmospheric Administration Coastal Ocean Program. One of the many components of this project was to design and maintain three surface moorings to collect time series data of water properties and currents and in situ meteorological events in the Juan de Fuca eddy region. The following describes the mooring deployment and recovery operations for the 2004 field season. Deployment Cruise: 2004-07 The deployment cruise, 2004-07, on the Canadian Coast Guard Offshore Research and Survey Vessel John P. Tully (Tully) was scheduled for April 26-May 9, 2004. The ECOHAB moorings were scheduled to be deployed on the second leg of the cruise. Bill Fredericks from the University of Washington (UW) and Nick Adams from the Northwest Fisheries Science Center (NWFSC) drove the equipment to the Institute of Ocean Sciences (IOS), prepared it for deployment and loaded it on the Tully. After all the UW and NWFSC equipment was loaded Mr. Fredericks and Mr. Adams returned to the UW and NWFSC. Jim Johnson joined the cruise May 1. The Tully left the dock at Patricia Bay, Vancouver Island, B.C. on the evening of May 1, 2004 with Jim Johnson serving as Dr. Hickey's representative on the cruise. Tom Juhasz from IOS was the Chief Scientist under the direction of Dr. Rick Thompson. The first two moorings to be deployed were EH3 in the Eddy and EH2 off the Washington Coast. They were successfully deployed on May 3, and 4. The last mooring to be deployed was EH1 in the Strait of Juan de Fuca. The currents were so strong that as soon as the mooring was deployed the surface buoy was partially pulled under. The buoy was brought back on deck and a 36 inch Scottsman float was secured inside the bridle to give it increased flotation. The mooring was then successfully deployed May 8, 2004. The Tully returned to Patricia Bay May 9, 2004 and Mr. Johnson returned to Seattle. Moorings were equipped with an ARGOS satellite transmitter so that their positions could be checked from shore. The satellite positions were checked daily for all three moorings. The moorings were also equipped with Coast Guard approved lights. The lights are amber. The flash pattern for all of the moorings is the same, 5 second quick flash 20, defined as 5, 1 second flashes followed by 15 seconds of dark, then repeated. The light at EH1, in Canadian waters, was required to be visible for 5 miles or greater, while those at EH2 and EH3, in US waters, were required to have a visibility of greater than 1 mile but less than 3 miles. In order to insure that the EH1 mooring in the Strait did not lose power to its light, Anthony Odell agreed to check its visibility from land several times over the course of the summer. The lights on the other two moorings are solar powered. Mooring Recovery Cruise: 2004-29 Sue Geier and Anthony Odell served as representatives from Dr. Hickey's group on the mooring recovery cruise, 2004-29 scheduled for September 13 through September 23, 2004 on the Tully. Tom Juhasz from IOS was the Chief Scientist under the direction of Dr. Rick Thompson. Ms. Geier and Mr. Odell were accompanied by Jonathon Kellogg, a new UW graduate student who came along to get sea experience and stand a CTD watch. Together they drove to IOS to join the second leg of the cruise on Sept. 16, 2004. The Tully left the dock at IOS, Patricia Bay early the next morning. All 3 moorings were successfully recovered on Sept. 18 and 19. All instruments were downloaded onboard the Tully immediately after recovery. The CCGS John P. Tully returned to the dock at IOS on September 23, 2004. After unloading their personal gear Ms. Geier, Mr. Odell, and Mr. Kellogg returned to Seattle. Acknowledgements We thank the crew and officers of CCGS J.P. Tully and the IOS/OSAP/UW mooring team of Tom Juhasz, Dave Spears, Jim Johnson, and Anthony Odell for their help in the mooring deployment and recovery. This research was supported through the Ecology and Oceanography of Harmful Algal Blooms program by National Oceanographic and Atmospheric Administration/Coastal Ocean Program Award No. NA17OP2789 and National Science Foundation Award No. 0234587. Mooring recovery and deplyment on the Tully was made possible by Canadian support to Rick Thomson at IOS. Mooring Summary A summary of the deployment and recovery times and positions for each mooring is shown in the table below followed by tables showing the instrumentation on each array. ECOHAB 2004 Moorings Quick Summary
Instrumentation
Below are tables showing the instrumentation on each array. EH1-2004 Juan de Fuca Strait Mooring Summary Position: 48-29.31N, 124-41.98W Depth: 255m Deployed: May 8, 2004 09:37 (+7) Recovered: September 18, 2004 15:03 (+7)
Abbreviations for variables measured are: EH2-2004 Washington Coast Strait Mooring Summary Position: 47-36.02N, 124-46.06W Depth: 90.6m Deployed: May 3, 2004 18:49 (+7) Recovered: September 19, 2004 08:25 (+7)
EH3-2004 Eddy Mooring Summary Position: 48-17.82N, 125-27.54W Depth: 128m Deployed: May 4, 2004 10:35 (+7) Recovered: September 19, 2004 14:53 (+7)
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