new technology for basin wide monitoring: gliders
DESCRIPTION
New Technology for basin wide monitoring: GLIDERS. Pierre Testor & Uwe Send (WP5 leader). Institut für Meereskunde (University of Kiel, Germany). MFSTEP Partner 7 Deliverables D1-D7. Our role (WP5) : Preliminary studies for application of Gliders - PowerPoint PPT PresentationTRANSCRIPT
New Technology for basin wide monitoring: GLIDERS
Institut für Meereskunde
(University of Kiel, Germany)
Pierre Testor & Uwe Send (WP5 leader)
MFSTEP Partner 7
Deliverables D1-D7
Our role (WP5) :Preliminary studies for application of GlidersOperation/analysis/assessment/data dissemination
WP14 (Loïc Petit de la Villeon, Ifremer) :gliders data coordinator
WP15 (Nadia Pinardi, INGV) :committee, meetings, communication plan, data products, dissemination policy, end-user involvement
Webb Research Corporation (Falmouth, MA)
University of Washington (Seattle, WS)
Underwater Flight
Control of :
- buoyancy like profiling floats
- ascent/descent angle & direction effect on Roll & Pitch by moving mass center position
Vertical speeds ~5 cm/s Horizontal speeds of ~20-30 cm/s
Scripps Spray Univ. Washington
Webb Res. Coastal
Webb Res. Thermal
max depth 1500 m 1000-2000 m 200 m 1000 m
endurance ~1 year ~1 year ~60 days ~1 year
range ~7000 km ~6000 km ~1500 km ~6000 km
up & down profiles
~700 ~600 ~200 ~600
communication global global Line of sight
global
Line of sight
global
navigation GPS GPS GPS GPSIn situ measurements, transfer of data by satellite
1000 m
Typical use on a section of 300 km 8-10 km
15 days to cover the section
40 up & down profiles
12-14 autonomous repetitions of the section in 6-7 months
Opportunity to pilot the glider with two-ways communication system
deployment and recovery via a small boat from a local support base
T° S
(U,V)
Webb Res. glider data
Florida
O2T° S
FluorescenceW Opticalbackscatter
UW glider data
US Washington state
- Programmable to cover any section required
- Potential to collect multidisciplinary data
- Independent of operating ships
- Unattended operation for extended periods
- Can be serviced with small boats by local operators
- Suitable for a basin with complicated bathymetry
- Scales of Mediterranean are just right for glider-operated section
- Naturally provides data in real time
- Can be reprogrammed remotely, to respond to events, to meet vessels or to be replaced in case of failure/sensor drift
To be tested, explored and compared to other elements of an observing system
General objectives of WP5
Explore the capabilities of gliders by operating one real-time continuous glider repeat-section feeding the overall system
1/ Evaluate and choose which of the available gliders prototype should/could be used
2/ Determine the optimal application, capabilities and mission parameters in the MFSTEP application
3/ Develop a real-time data dissemination system for glider data
4/ Obtain data from the unattended glider repeat transects along one section in the Mediterranean
5/ Disseminate real-time data to the community and to the forecasting system during the TOP
6/ Analyze the data and assess the value of gliders
7/ Establish a European capability for operating gliders
A
BC
GLIDER :- Basin monitoring- Strait monitoring
VOS XBT network
local support bases
A: 800 km = 40 days / 100 up&down profiles
B: 200 km = 10 days / 20 up&down profiles
C: 400 km = 20 days / 50 up&down profiles
Methods
Months 3 6 9 12 15 18 21 24 27 30 33 36
Pre - TOP TOP Post - TOP
5100 Glider choice and mission parameters5200 Glider purchase and preparation5300 Development of real-time data system5410 Deployment during TOP5500 Dissemination of real-time data5610 Analysis of data5620 Technical analysis of glider data5700 Assessment of gliders in overall system
Planning
- scientific objectives / observations needed- bathymetry and expected currents- capabilities and endurance of the glider- location of land base - small-ship access to part of gliders tracks for comparison measurements
- speed- descent/ascent angle- max depth - sampling intensity- time spent at surface- two-way communication options
- UW glider - Scripps glider- Webb Res. Powered Glider coastal/thermal powered battery, max depth : 1000 mT, S & currents
TASK 5100 : Months 1- 6study ofthe optimal type application capabilities / mission parameters
TASK 5200 : Months 6-18Purchase, test, and preparation of one glider
TASK 5300 : Months 6-18Development of the real-time data dissemination system
Telemetry system (2-way communication) : Orbcomm/Globalstar/Iridium
Automatic routines Convert raw to physical dataChecks for consistency and data quality
Data path :Glider - operator - ADDC (WP14)
Fall 2003 : Webb’s during testing, for learning the useage and programming etc…Winter 2003 : glider in Kiel for preparation
TASK 5410 : Months 19-24Preparation, deployment and operation during the TOP
- Launching with boats from the local support base (CNR – IST)- Unattended operation- Measures of T°, S, currents
TASK 5500 : Months 19-24Dissemination of real-time data
- Proper functioning of the entire data stream- Towards the forecasting structure in the same way as XBTs and other data sets
TASK 5600 : Months 18-36Analysis and interpretation of the data collected
5620: technical analysis (performance, data return/quality, telemetry statistics, endurance, speed)
5610: physical analysis (new insights of upper and intermediate circulations in the Ionian basin)
Malanotte-Rizzoli et al. (1997, 1999)
Circulation of Surface Waters
AW
ASW
LSW
1987 & 1991
In 1991, strong 3 lobes anticyclonic eddyblocking input of AW in the Levantine basin
AW
ISW
ASW
AW
ISW
LSW
ISW
- Alongslope circulation- High mesoscale activity- No mid-basin jets- Northern branch : interranual- Pelops, Iera-Petra gyres detachments : not permanent features
May also affect intermediate waters
Hamad et al. (2002)
Lybian Eddiesformation
Alongslope currentinstabilities
- Alongslope circulation- High mesoscale activity- No mid-basin jets- Northern branch : interranual- Pelops, Iera-Petra gyres detachments : not permanent features
May also affect intermediate waters
Malanotte-Rizzoli et al. (1997, 1999)
LIW/CIW
Circulation of Intermediate Waters
CIW
LIW
1987
Lascaratos et al. (1999)
Malanotte-Rizzoli et al. (1999)
LIW/CIW
CIW
LIW
1991
Adriatic waters
Lascaratos et al. (1999)
TASK 5700 : Months 30-36Assessment of the value of gliders in the overall system
Evaluation of - value and potential in an operational system- complementarity/overlap with other elements of the system
Possible extensions- coastal monitoring- “virtual mooring”
Critical recommendation for the potential of gliders in a future Mediterranean Observing System