autonomous underwater gliders off newport, or cross-margin transect twice per week since april 2006...
TRANSCRIPT
Autonomous Underwater Gliders off Newport, OR
cross-margin transect twice per cross-margin transect twice per week since April 2006week since April 2006
Along historic NH line (50+ years)Along historic NH line (50+ years)
CTDdissolved oxygenchlorophyll fluorescenceCDOM fluorescencelight backscatter
Co-PIs: Jack Barth and Kipp Shearman Graduate Students: Chris OrdoniezTechnicians: Anatoli Erofeev and Zen Kurokawa Piero Mazzini
Kate Adams Gonzalo Saldias
Northern California Current System
Barth et al. (2008); Bane et al. (2005)
Intense air-sea interaction in coastal ocean
CTDCTD
Optical Sensors Optical Sensors (Chl, CDOM and (Chl, CDOM and Backscatter)Backscatter)
Pitch BatteriesPitch Batteries
Science BayScience Bay
Displacement PumpDisplacement Pump
Glider Control and Glider Control and more batteriesmore batteries
Air bladderAir bladder
Aanderaa Optical Aanderaa Optical Dissolved Oxygen Dissolved Oxygen sensorsensor
GPS, Iridium and Freewave Antennae in tail fin
7 ft long
100 lbs in air
Autonomous Underwater Glider
Glider bobGlider bob
February 2005February 2005 Bob SmithBob Smith
Jane HuyerJane Huyer
Glider janeGlider jane
June 2005June 2005
The OSU Glider FleetThe OSU Glider Fleet
Four 200-m TWR Four 200-m TWR SlocumsSlocums
One 350-m TWR One 350-m TWR Slocum with RDI DVLSlocum with RDI DVL
Three 1000-m Three 1000-m SeaglidersSeagliders
Glider Operations and Maintenance
• deploy• execute mission• recover• refurbish• calibrate• repair/test• deploy
OSU Glider Operations • 90 km cross-shelf
• strong currents
(50+ cm/s)
• abrupt bathymetry
• historical observations
• April 2006– July 2012April 2006– July 2012
• 2835 glider-days2835 glider-days
• ~800 sections~800 sections
• 208,500+ vertical208,500+ vertical
profiles (~4000 inprofiles (~4000 in
archive prior to ‘05)archive prior to ‘05)
• 67,000+ km67,000+ km
May 13-19, 2012
http://gliderfs2.coas.oregonstate.edu/gliderweb/
DissolvedOxygen
fromglider
Hypoxia
July 2006
Responding to changing wind and wave conditions
• adjust glider communications adjust glider communications scheduleschedule
• 6-hours offshore6-hours offshore• 1-hour near coast1-hour near coast
• adjust glider target waypointsadjust glider target waypoints• continual interaction with boat continual interaction with boat
operators negotiating operations operators negotiating operations during weather windowduring weather window
• response planning for extreme response planning for extreme conditionsconditions
54-foot Elakha will cross the bar
coast50-m isobath200-m isobath
2011
2010
2009
2008
2007
2006
2012
glider “bob” in the January 18-19, 2012 storm
win
d s
pee
d (
kn
ots)
wav
e h
eigh
t (f
eet)
NOAA Buoy 46050
50 knots
30 feet
November 28, 2001
glider “bob” approaches shore and gets carried north in the January 18-19, 2012, storm
oceanographic data from across the shelf in 30-foot seas!
Low-salinity pulses from Columbia River
Densities as low as 1018 kg/m**3
Bottom is 1027
1023 (white)1020 (pink)1019 (magenta)
A section from today …
Salinity
Lessons learned (1 of 2):
•Be considerate of glider team re: 24/7/365
o Burnout is an issue
o One week on every few weeks; have backup pilots
•Do the outreach at the coast with ocean users
o Scientist and Fishermen’s Exchange (SAFE)
•Be aware of fishing seasons near ports
o Opening days and derby days have lots of boats!
•Never deploy on Fridays
o Failures inevitably occur on the weekend
Lessons learned (2 of 2):
•Never give up on a “lost” glider
o “Fail safes” are amazing
•Make use of all data you can get your hands on for operations
o Wind, waves, currents, freshwater discharge, forecasts
o This is the IOOS paradigm
•Gliders and glider data need attention
o Compass calibrations
o Test, prepare, analyze, & calibrate yourselves
solidify funding for the west-coast glider and mooring arrays
strategically build glider array
standardize long-term mooring observations and add biological sensors of interest to PaCOOS
incorporate glider and mooring data into ocean observing system (including data assimilation)
UW
OSU
MBARI/SIO
SIO
Plans (circa 2008)Plans (circa 2008)
NSF’s Ocean Observatories Initiative (OOI)
Endurance Array• Multi-platform, multi-scale• Fixed and mobile assets• Cross-shelf arrays at
Newport and Grays Harbor• Oregon Line cabled to
Regional Scale Node
• Newport glider line ~Fall 2012
• Remainder of array 2013
COAS (OSU)
500 km
125 km