Design and Operation of Automated Ice-Tethered Profilers for Real-Time Seawater Observations in the Polar Oceans
An automated, easily-deployed Ice-Tethered Profiler (ITP) has been developed for deployment on perennial sea ice in polar oceans to measure changes in upper ocean temperature and salinity in all seasons. The ITP system consists of three components: a surface instrument that sits atop an ice floe, a...
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ftdtic:ADA456454 2023-05-15T14:59:05+02:00 Design and Operation of Automated Ice-Tethered Profilers for Real-Time Seawater Observations in the Polar Oceans Toole, J. Proshutinsky, A. Krishfield, R. Doherty, K. Frye, D. Hammar, T. Kemp, J. Peters, D. Heydt, K. von der WOODS HOLE OCEANOGRAPHIC INSTITUTION MA 2006-06 text/html http://www.dtic.mil/docs/citations/ADA456454 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA456454 en eng http://www.dtic.mil/docs/citations/ADA456454 Approved for public release; distribution is unlimited. DTIC Physical and Dynamic Oceanography *POLAR REGIONS *SEA WATER *SEA ICE *ICE CAPS DATA BASES REAL TIME COMPUTER PROGRAMMING TRANSMITTER RECEIVERS ICEBREAKERS ARCTIC OCEAN IRIDIUM BUOYS UNDERWATER TRACTION ARTIFICIAL SATELLITES OCEANS SALINITY *POLAR OCEANS *ICE-TETHERED PROFILERS ITP(ICE-TETHERED PROFILER) IBO(ICE BASED OBSERVATORY) ICE BASED OBSERVATORY ARCTIC INSTRUMENTATION Text 2006 ftdtic 2016-02-22T05:55:40Z An automated, easily-deployed Ice-Tethered Profiler (ITP) has been developed for deployment on perennial sea ice in polar oceans to measure changes in upper ocean temperature and salinity in all seasons. The ITP system consists of three components: a surface instrument that sits atop an ice floe, a weighted, plastic-jacketed wire-rope tether of arbitrary length (up to 800 m) suspended from the surface instrument, and an instrumented underwater unit that profiles up and down the wire tether. The profiling underwater unit is similar in shape and dimension to an ARGO float except that the float's variable-buoyancy system is replaced with a traction drive unit. Deployment of ITPs may be conducted either from ice caps or icebreakers, utilizing a self contained tripod/winch system that requires no power. Careful selection of an appropriate multiyear ice floe is needed to prolong the lifetime of the system (up to 3 years depending on the profiling schedule). Shortly after deployment, each ITP begins profiling the water column at its programmed sampling interval. After each acquired temperature and salinity profile, the underwater unit (PROCON) transfers the data and engineering files using an inductive modem to the surface controller (SURFCON). SURFCON-also accumulates battery voltages, buoy temperature, and locations from GPS at specified intervals in status files, and queues that information for transmission at the start of each new day. At frequent intervals, an Iridium satellite transceiver in the surface package calls and transmits queued status and CTD data files onto a WHOI logger computer, which are subsequently processed and displayed in near-real time at http://www.whoi.edu/itp. In 2004 and 2005, three ITP prototypes were deployed in the Arctic Ocean. Each system was programmed with accelerated sampling schedules of multiple one-way traverses per day between 10 and 750-760 m depth in order to quickly evaluate endurance and component fatigue. The original document contains color images. Text Arctic Arctic Ocean Sea ice Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean |
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Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Physical and Dynamic Oceanography *POLAR REGIONS *SEA WATER *SEA ICE *ICE CAPS DATA BASES REAL TIME COMPUTER PROGRAMMING TRANSMITTER RECEIVERS ICEBREAKERS ARCTIC OCEAN IRIDIUM BUOYS UNDERWATER TRACTION ARTIFICIAL SATELLITES OCEANS SALINITY *POLAR OCEANS *ICE-TETHERED PROFILERS ITP(ICE-TETHERED PROFILER) IBO(ICE BASED OBSERVATORY) ICE BASED OBSERVATORY ARCTIC INSTRUMENTATION |
spellingShingle |
Physical and Dynamic Oceanography *POLAR REGIONS *SEA WATER *SEA ICE *ICE CAPS DATA BASES REAL TIME COMPUTER PROGRAMMING TRANSMITTER RECEIVERS ICEBREAKERS ARCTIC OCEAN IRIDIUM BUOYS UNDERWATER TRACTION ARTIFICIAL SATELLITES OCEANS SALINITY *POLAR OCEANS *ICE-TETHERED PROFILERS ITP(ICE-TETHERED PROFILER) IBO(ICE BASED OBSERVATORY) ICE BASED OBSERVATORY ARCTIC INSTRUMENTATION Toole, J. Proshutinsky, A. Krishfield, R. Doherty, K. Frye, D. Hammar, T. Kemp, J. Peters, D. Heydt, K. von der Design and Operation of Automated Ice-Tethered Profilers for Real-Time Seawater Observations in the Polar Oceans |
topic_facet |
Physical and Dynamic Oceanography *POLAR REGIONS *SEA WATER *SEA ICE *ICE CAPS DATA BASES REAL TIME COMPUTER PROGRAMMING TRANSMITTER RECEIVERS ICEBREAKERS ARCTIC OCEAN IRIDIUM BUOYS UNDERWATER TRACTION ARTIFICIAL SATELLITES OCEANS SALINITY *POLAR OCEANS *ICE-TETHERED PROFILERS ITP(ICE-TETHERED PROFILER) IBO(ICE BASED OBSERVATORY) ICE BASED OBSERVATORY ARCTIC INSTRUMENTATION |
description |
An automated, easily-deployed Ice-Tethered Profiler (ITP) has been developed for deployment on perennial sea ice in polar oceans to measure changes in upper ocean temperature and salinity in all seasons. The ITP system consists of three components: a surface instrument that sits atop an ice floe, a weighted, plastic-jacketed wire-rope tether of arbitrary length (up to 800 m) suspended from the surface instrument, and an instrumented underwater unit that profiles up and down the wire tether. The profiling underwater unit is similar in shape and dimension to an ARGO float except that the float's variable-buoyancy system is replaced with a traction drive unit. Deployment of ITPs may be conducted either from ice caps or icebreakers, utilizing a self contained tripod/winch system that requires no power. Careful selection of an appropriate multiyear ice floe is needed to prolong the lifetime of the system (up to 3 years depending on the profiling schedule). Shortly after deployment, each ITP begins profiling the water column at its programmed sampling interval. After each acquired temperature and salinity profile, the underwater unit (PROCON) transfers the data and engineering files using an inductive modem to the surface controller (SURFCON). SURFCON-also accumulates battery voltages, buoy temperature, and locations from GPS at specified intervals in status files, and queues that information for transmission at the start of each new day. At frequent intervals, an Iridium satellite transceiver in the surface package calls and transmits queued status and CTD data files onto a WHOI logger computer, which are subsequently processed and displayed in near-real time at http://www.whoi.edu/itp. In 2004 and 2005, three ITP prototypes were deployed in the Arctic Ocean. Each system was programmed with accelerated sampling schedules of multiple one-way traverses per day between 10 and 750-760 m depth in order to quickly evaluate endurance and component fatigue. The original document contains color images. |
author2 |
WOODS HOLE OCEANOGRAPHIC INSTITUTION MA |
format |
Text |
author |
Toole, J. Proshutinsky, A. Krishfield, R. Doherty, K. Frye, D. Hammar, T. Kemp, J. Peters, D. Heydt, K. von der |
author_facet |
Toole, J. Proshutinsky, A. Krishfield, R. Doherty, K. Frye, D. Hammar, T. Kemp, J. Peters, D. Heydt, K. von der |
author_sort |
Toole, J. |
title |
Design and Operation of Automated Ice-Tethered Profilers for Real-Time Seawater Observations in the Polar Oceans |
title_short |
Design and Operation of Automated Ice-Tethered Profilers for Real-Time Seawater Observations in the Polar Oceans |
title_full |
Design and Operation of Automated Ice-Tethered Profilers for Real-Time Seawater Observations in the Polar Oceans |
title_fullStr |
Design and Operation of Automated Ice-Tethered Profilers for Real-Time Seawater Observations in the Polar Oceans |
title_full_unstemmed |
Design and Operation of Automated Ice-Tethered Profilers for Real-Time Seawater Observations in the Polar Oceans |
title_sort |
design and operation of automated ice-tethered profilers for real-time seawater observations in the polar oceans |
publishDate |
2006 |
url |
http://www.dtic.mil/docs/citations/ADA456454 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA456454 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA456454 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766331221967634432 |