autonomous underwater gliders off newport, or cross-margin transect twice per week since april 2006...

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