The sio glider program
Download
1 / 8

The SIO Glider Program - PowerPoint PPT Presentation


  • 95 Views
  • Uploaded on

The SIO Glider Program. The underwater glider ‘Spray’. Operations in AOSN 2003. ~2.5 km. Five gliders for 5 weeks uninterrupted Operate 5 ~100-km offshore sections Speed ~25 km/day ~0.5 knot Profile to 400 m or 3 m from bottom Cycle takes ~3 hours. ~ 400 m.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' The SIO Glider Program' - imani-goodman


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
The sio glider program
The SIO Glider Program

The underwater glider ‘Spray’


Operations in aosn 2003
Operations in AOSN 2003

~2.5 km

Five gliders for 5 weeks uninterrupted

Operate 5 ~100-km offshore sections

Speed ~25 km/day ~0.5 knot

Profile to 400 m or 3 m from bottom

Cycle takes ~3 hours

~ 400 m

Objectives: data for model assimilation; technical development

0 to 400 m vertical average velocity interesting

T data good but need higher vertical resolution

CTD, Optical Backscatter, Fluorometer all suffer from biofouling

Scales are 25 km and 2 days, shorter than we planned for




Fouling is the limit to duration
Fouling Is The Limit to Duration

In AOSN II five Sprays operated 35 days using 20% of their battery energy

All five optical (backscatter/fluorometer) sensors failed from fouling

CTDs were erratic as a result of biofouling

Even if sensors work, fouling will eventually degrade gliding performance


Scales of variability
Scales of Variability

Scales longer at surface – Offshore variation unknown

On average L ~ 25 km T ~ 2 days

T

L


Muri 2005
MURI 2005

Preparations

Test new CTD and short-range ADCP in San Diego

Improve and simplify the AOSN 2004 quality-control process and provide web access

Develop web-based software to simplify control and to guard against errors in issuing mission changes

2005 Field Trial:

Verify that bio-fouling problems under control

Gather statistical info (scales, tide energy, etc.) needed to plan 2006 experiment.

Use adaptive control to control scale-measuring array


Muri 2006
MURI 2006

4 Sprays with CTD and ADCP (U(z), T(z), S(z))

Use software for 24/7 maintenance of the array to maximize mapping skill will be available (in collaboration with Princeton)

Gliders can be used to map mesoscale while investigating:

1. Mixing (Thorpe Scale) and relation to Richardson Number

2. Mixing and advection by internal tides

3. Mixed layer response to winds in upwelling

4. Accuracy of acoustic propagation predictions?


ad