Ice tethered profiler itp moorings
Download
1 / 32

Ice Tethered Profiler (ITP) Moorings - PowerPoint PPT Presentation


  • 63 Views
  • Uploaded on

Ice Tethered Profiler (ITP) Moorings. WHOI Principle Investigators John Toole Rick Krishfield Andrey Proshutinsky. Ice-Based Observatories. Goal: Document/understand interannual change through sustained observations of the Arctic ice pack, the overlying atmosphere,

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 ' Ice Tethered Profiler (ITP) Moorings ' - benita


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
Ice tethered profiler itp moorings

Ice Tethered Profiler (ITP)Moorings

WHOI Principle Investigators

John Toole

Rick Krishfield

Andrey Proshutinsky


Ice based observatories
Ice-Based Observatories

Goal: Document/understand interannual change

through sustained observations of the

Arctic ice pack, the overlying atmosphere,

and the upper ocean water properties


System specifications
System Specifications

  • Capable of returning in real time, high accuracy daily (or semi daily) temperature and salinity profiles to 750m depth for 2 years.

  • Deployable from light aircraft and/or helicopters through a conventional 10.5” (.26 m) ice-augured hole.

  • Modestly priced, allowing them to be deployed in large numbers and be considered expendable.

  • Capable of supporting plug-in modules for additional surface and/or subsurface instrumentation.


Ice tethered profiler schematic
Ice-Tethered Profiler Schematic

Profiling Interval: 10m - 800 m or less

Profiling range: 1,500,000 m

Duration: 2.5- 3 years at one profile / day

Temperature specification: -35° C

Data telemetry: up to 50 kbytes / day

Sensors: Seabird 41-CP CTD (same as ARGO floats)

Telemetry: Seabird inductive link from profiler to surface unit; Iridium link to shore

Power: lithium “DD” battery packs

Size: Profiler fits through an 10.5” hole

in the ice

Profile speed: .2 meters/sec. (2 hours RT)


Itp sensor payload options
ITP Sensor Payload Options

  • CTD

  • DO – Dissolved Oxygen

  • MAVS – Modular Acoustic Velocity Sensor

  • Biohead – PAR Sensor, Fluorometer


Clamp on inductive instruments
Clamp on Inductive Instruments

  • SAMI - PH

  • SAMI (CO2) – CTD and PAR

  • Microcat


Itp deployment operations
ITPDeployment Operations


Finding an ice floe
Finding an Ice Floe

  • Multi year preferred 1.5 – 4.5 meters thick.

  • Medium height ice ridges surrounding the site for protection

  • Few cracks.

  • If a suitable ice floe can’t be located, ITP system can be deployed in open water.













Electro mechanical inductive hose assembly
Electro / Mechanical Inductive Hose Assembly







Data examples
Data Examples cruise. Found in Iceland 2/2012


Double diffusive staircase stratification
Double-diffusive Staircase Stratification cruise. Found in Iceland 2/2012

Expanded views of the potential temperature profiles and potential temperature - salinity diagrams. Above the Atlantic Layer, temperature and salinity both decrease with height: a stratification subject to the diffusive layering form of double diffusion that is manifested by the staircase profile resolved by the ITP (left). Over plotted potential temperature-salinity curves at the level of the Atlantic Layer (right) clearly document intrusions that erode this warm salty water mass.


Itp1 atlantic eddy profile
ITP1 Atlantic eddy profile cruise. Found in Iceland 2/2012


Expanded view of atlantic water eddy
Expanded view of Atlantic water eddy cruise. Found in Iceland 2/2012


Itp3 engineering data
ITP3 engineering data cruise. Found in Iceland 2/2012


The End cruise. Found in Iceland 2/2012

Thank You


ad