ASLO Talk.021813
- 1. NEW APPROACHES TO PIER-BASED OCEAN MONITORING PLATFORMS •Scott Kindelberger •Danielle Doremus •J. Michael Trapp •Susan Libes
- 2. Long Bay Hypoxia Monitoring Consortium
- 3. 250 meters (mean high water contour) 4 - 7 meter depth range 2nd Ave North (Fishing Pier)
- 4. 4 day deployment, July 2010 Water Temp 82 °F 6 day deployment, Jan 2013 Water Temp 54 °F 4 month deployment Winter 2012 Biofouling Issues
- 5. P5300150 3 inch OD/ 2.75 inch ID, CPVC pipe Drilled for water exchange Copper-based antifouling paint Traditional Standpipe Deployment
- 6. → Macrofouling reduces flushing rates → Microenvironment creation INSIDE pipe → Not reflective of ambient conditions Side by Side Profile Comparison →Measurements taken outside pipe →Compare with readings inside pipe →Take before and after sensor cleaning 5-7m depth range The ‘Standpipe Effect’
- 7. P5300150 OUTSIDEPIPE OUTSIDEPIPE OUTSIDEPIPE July 16, 2010 Δ -2.99 mg/L Inside Pipe July 28, 2010 Δ -4.49 mg/L Inside Pipe August 2, 2010 Δ -3.83 mg/L Inside Pipe DissolvedOxygen(mg/L) Δ Dissolved Oxygen Comparison (Inside - Outside Pipe) 5-7m depth range The ‘Standpipe Effect’
- 8. August 3 to 5, 2011 Is it real or not? Bad Timing
- 9. P5300150 17 Hours -0.8 ‰ drift 45 Hours -1.3 ‰ drift Surface Salinity 9/7/10 9/8/10 9/9/10 9/10/10 Salinity(‰) Low flow results in particle accumulation in conductivity chamber 72 Hour Salinity Drift
- 10. Deck housing controls access Deck Structure
- 11. Anchor / Cable Deployment
- 12. Anchor Design
- 13. Bent pipes maintains 12inch cable spacing Cable Deployment
- 14. 12 inch cable spacing Anchor / Cable Deployment
- 15. Surface Sled / Counterweight
- 16. Surface Sled / Counterweight
- 17. High Tide Surface Sled / Counterweight
- 18. System maintains 1.0m ± 0.2 depth Depth(m) Increased depth variability indicates rougher seas 48 Hour Surface Depths
- 19. YSI 6600 ½ hp 222Rn Supply Pump Larval Recruitment Tiles Additional Equipment
- 20. Value > 90th percentile 90th percentile 75th percentile 25th percentile 10th percentile Value < 10th percentile Median Standpipe Deployment Zipline Deployment August 2009 March 2011 May 2012 Boxplot Analysis
- 21. -5 -4 -3 -2 -1 0 1 2 3 D DO = (Econet sensor – Manually deployed sensor) DDO(mg/L) In-situ Uncertainty Estimates N = 137 (Standpipe) N = 90 (Zipline) N = 90 0.2 0.1 0.0 0.1 0.2 0.2 0.1 0.2 0.4 0.9 0.4 0.1 0.1 0.3 0.6 0.3 0.1 0.0 0.0 0.1 DISSOLVED OXYGEN N = 128 (Standpipe) N = 90 (Zipline) Before Sensor Cleaning After Sensor Cleaning Interval Standpipe Zipline Standpipe Zipline 10th to 90th + 0.9 + 0.2 + 0.6 + 0.3 25th to 75th + 0.4 + 0.1 + 0.3 + 0.1 Before Sensor Cleaning After Sensor Cleaning
- 22. →Manufacturer Specifications: ± 1%, or 0.1mg/L (whichever is larger) OEM Specifications
- 23. Pre Clean Post Clean Pre Standpipe Pre Zipline Post Standpipe Post Zipline -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 Preclean Postclean Interval Standpipe Zipline Standpipe Zipline 10th to 90th + 0.3 + 0.2 + 0.3 + 0.2 25th to 75th + 0.2 + 0.1 + 0.2 + 0.1 DTemp(°F) D Temp = (Econet sensor – Manually deployed sensor) N = 142 N = 89 N = 128 N = 90 0.3 0.2 0.1 0.1 0.2 0.2 0.1 0.0 0.0 0.1 0.3 0.2 0.1 0.0 0.1 0.2 0.0 0.0 0.0 0.1 In-situ Uncertainty Estimates TEMPERATURE Temp Boxplot
- 24. Pre Clean Post Clean Pre Standpipe Pre Zipline Post Standpipe Post Zipline -3 -2 -1 0 1 2 3 4 5 Preclean Postclean Interval Standpipe Zipline Standpipe Zipline 10th to 90th + 0.3 + 0.3 + 0.2 + 0.2 25th to 75th + 0.2 + 0.2 + 0.1 + 0.1 DSalinity(ppt) D Salinity = (Econet sensor – Manually deployed sensor) 0.3 0.2 0.0 0.1 0.3 0.2 0.1 0.0 0.1 0.2 0.1 0.0 0.1 0.2 0.3 0.1 0.0 0.1 0.1 0.2 N = 140 N = 90 N = 128 N = 90 SALINITY In-situ Uncertainty Estimates Salinity Boxplot
- 25. www.ysieconet.com (select ‘Long Bay Hypoxia Monitoring’)
- 26. Blank
- 27. Deck Hardware
- 29. Bottom Sonde Spin Stop
- 30. Center Cable Deployment Layout
- 31. Stats