PYLOS

Pylos Observatory

Multidisciplinary observatory mooring located in the cross road of Adriatic and Eastern Mediterranean basins. Very geologically active area with lots of earthquakes and landslides as well as a potential source of Tsunamis that might affect the Eastern Mediterranean Sea.

http://www.fixo3.eu/wp-content/uploads/2014/01/pylos2.png

Infrastructure Location

Study Area

Location Southern Ionian Sea
Distance from Land 18 km
Max Depth 1670 m
Oceanographic features of area One of the main reasons that the Mediterranean Sea has often be named by oceanographers as mini-ocean or a natural geophysical laboratory is that, unlike other semi-enclosed basins, it possesses its own conveyor belt. Thus water from Atlantic Ocean inflows at the surface layers travelling eastwards all the way to Levantine basin. There it become denser sinking into deeper layers and flows into the opposite direction out of the basin. In the Eastern basin there are two areas where deep water is formed – the Adriatic and the Aegean Seas. Recent developments have shown that both sites have the potential to contribute to the waters filling the deep Ionian and Levantine basins (deeper than 2000m down to the bottom). Less dense water, so called “intermediate”, is formed primarily in the Levantine as well as in the Cretan Sea.
The Pylos site in the SE Ionian is a crossroad where all the above intermediate and deep water masses meet. It is especially on the pathway of the Aegean Sea dense water that travels to the north along the western coast of Greece. Furthermore, it is a very geologically active area with lots of earthquakes and landslides as well as a potential source of Tsunamis that might affect the Eastern Mediterranean Sea.
Relevant publications isi journals Velaoras, D. , Kassis, D., Perivoliotis, L., Pagonis, P., Hondronasios, A., Nittis, K., 2013, "Temperature and salinity variability in the greek seas based on POSEIDON stations time series: Preliminary results", doi: 10.12681/mms.446, Mediterranean Marine Science, Volume 14, Issue 3, 21 June 2013, Pages 5-18
S. Stavrakakis, A. Gogou, E. Krasakopoulou, A. P. Karageorgis, H. Kontoyiannis, G. Rousakis, D. Velaoras, L. Perivoliotis, G. Kambouri, I. Stavrakaki, and V. Lykousis, 2013, "Downward fluxes of sinking particulate matter in the deep Ionian Sea (NESTOR site), eastern Mediterranean: seasonal and interannual variability", doi:10.5194/bg-10-7235-2013, Biogeosciences, Vol. 10, pages 7235-7254
Lykousis,V., Nittis, K., Ballas, D., Perivoliotis, L., Kassis, D., Pagonis, P. and Sakellariou, D. 2012. The Hellenic deep sea observatory site. Science objectives and implementation. In: Favali P and Bernanzoli L. (Eds) “Deep-Sea Observatories” Special Publication Geophysical Sciences, Springer-Praxis Publ. Company (accepted for publication)
Relevant publications proceedings published in the context of conference

Scientific Researchers

Name Email
Leonidas Perivoliotis <Please login to view>
George Petihakis <Please login to view>
Gerassimos Korres <Please login to view>
Dimitris Velaoras <Please login to view>
Dimitris Kassis <Please login to view>

Technicians

Name Email
Paris Pagonis <Please login to view>
Manolis Ntoumas <Please login to view>
Nikos Zissis <Please login to view>

Status / Maintenance

System Status Operational Planned Frequency 6 month(s)
Platform Required Deep Sea Research Vessel People Involved 5
Duration of Operations 2 day(s) Cleaning Yes
Replacments Yes Download Data Yes

Data Information

Final data output format ASCII NetCDF Data Quality Check Yes
Type of quality check on real-time/near-real time data Automatic Real Time – Data availability target hours
Type of Quality check on delayed mode data Manual Delayed Mode – Data availability target weeks
Own data management Yes Type of use of data Data assimilation Research
Data Management Link
GEOSS URN
GEOSS Link

TNA

Description of the infrastructure
The Pylos observatory operates since May 2007 in the SE Ionian Sea at a depth of 1670m, in the vicinity of the area where a sea-floor cabled infrastructure is being developed (Nestor neutrino telescope). The observatory includes a water column component and an autonomous seabed platform.
The water column component consists of a surface Wavescan type buoy equipped with sensors for meteorological, waves and surface oceanographic parameters (Temperature, Salinity, Current) as well as a suite of CTD sensors attached on the inductive mooring line (20, 50, 75, 100, 250, 400, 600, 1000m). All sensors provide real time hydrological observations of this key-area where the Cretan Intermediate and Deep Waters (CIW, CDW) spread northwards towards the Adriatic and meet with the Eastern Mediterranean Deep Waters (EMDW). The seabed component consists of an autonomous platform equipped with a high accuracy and sampling frequency pressure sensor for tsunami detection as part of an early warning system. The platform is also equipped with a CTD probe and dissolved oxygen sensor, offering at the same time near-floor deep observations in the Eastern Mediterranean sea. Data from the deep platform is transmitted through acoustic modems to the surface buoy at the standard 3 hours interval of the POSEIDON network. However, in the case that a tsunami event is detected the deep platform switches into an alarm mode sending data at a higher rate of 15-60 sec to the surface buoy and from there to the operational centre.

The mooring line also hosts a set of Passive Aquatic Listeners (PALs) for rainfall estimates and marine mammal acoustic detection. The PAL systems have been recently evaluated against X-band radar measurements in this area and were found to provide very realistic estimates of precipitation.

Surface and water column
Hosting: Buoy can host additional instrumentation for atmospheric and air-sea interface parameters. Mooring can host both real-time as well as autonomous systems.

Data: Atmosphere: Wind speed and direction, temperature, pressure
Ocean-Air interface: Wave height-period-direction, salinity, temperature, current speed and direction
Water column: Salinity, temperature, current

Seafloor
Hosting: Systems can be mounted on seabed module. Communication with surface via acoustic
modem for the existing sensors and possibly for additional systems (depending on configuration and technical requirements).
Data: Salinity, temperature, depth, dissolved oxygen, CO2, CH4, turbidity and pH.

Avaliable for TNA Yes
Prefered time period for TNA During maintenance cruises (every ~ 6months)
TNA Support offered Logistical, technological and scientific support for all components.

For more information visit (http://www.poseidon.hcmr.gr) .

Services Available Data and sensor inter-comparison and validation missions
Potential Additional Uses
Data Ports -
Availability of External Power yes
Instrument installation methodology

The instruments on the buoy can be installed underneath on custom attachments as well as inside the hull on the four holes.

Regarding the mooring line, instruments are attached on inductive cable.

Data History
Instrument installation methodology The regular procedure involves during the first day the recovery of the buoy the cleaning of the sensor, data downloading, battery change, replacing consumables etc and deployment during the second day once a thorough check on deck is performed.
Observatory maintenance estimated or planned schedules Every 6 months (winter - summer)
Data policy and access Data are freely available - http://mongoos.hcmr.gr/data/fixO3
Additional comments
Modality of access In-Person Partially Remote Remote

Sensors

Deployed Planned
Instrument/Sensor Type Wetlabs FLNTU Parameter(s)
Platform Buoy Manufacturer Wetlabs
Instrument/Sensor documentation (URL) http://www.wetlabs.com/eco-fl
Sensor Type / Model Eco FLNTU Power Supply
Approximate Depth / Height 20,50,75,100 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available No Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Dissolved oxygen Parameter(s)
Platform Mooring Manufacturer Seabirb, Aanderaa
Instrument/Sensor documentation (URL) http://www.seabird.com/sbe63-optical-dissolved-oxy gen-sensor
Sensor Type / Model SBE 63, Aandi optode Power Supply
Approximate Depth / Height 20,50,75,100 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available No Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Turbidity meter Parameter(s)
Platform Seaflo Manufacturer Aanderaa
Instrument/Sensor documentation (URL) http://www.aanderaa.com/productsdetail.php?Turbidi ty-Sensor-20
Sensor Type / Model 4112 Power Supply
Approximate Depth / Height 1670 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available No Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type CH4 Parameter(s)
Platform Seaflo Manufacturer Contros
Instrument/Sensor documentation (URL) http://www.contros.eu/hydroc-ch4-plus.html
Sensor Type / Model Contros CH4 Power Supply
Approximate Depth / Height 1670 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available No Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type CO2 Parameter(s)
Platform Seaflo Manufacturer Contros
Instrument/Sensor documentation (URL) http://www.contros.eu/hydroc-co2-carbondioxide-sen sor.html
Sensor Type / Model Contros CO2 Power Supply
Approximate Depth / Height 1670 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available No Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Aanderaa Current Meter Parameter(s)
Platform Seaflo Manufacturer Aanderaa
Instrument/Sensor documentation (URL) http://www.aanderaa.com/productsdetail.php?SeaGuar dII-DCP-53
Sensor Type / Model Seagurd DCP Power Supply
Approximate Depth / Height 1670 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available No Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Young 04106 Parameter(s)
Platform Buoy Manufacturer Young
Instrument/Sensor documentation (URL) http://www.youngusa.com/products/7/
Sensor Type / Model Mechanical Wind sensor Power Supply
Approximate Depth / Height 1 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available No Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Vaisala PTB 220A Parameter(s)
Platform Buoy Manufacturer Vaisala
Instrument/Sensor documentation (URL) http://www.vaisala.com
Sensor Type / Model Digital Barometer Power Supply
Approximate Depth / Height 0 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available No Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Omega Parameter(s)
Platform Buoy Manufacturer Omega
Instrument/Sensor documentation (URL) http://www.omega.com
Sensor Type / Model Air Temperature sensor Power Supply
Approximate Depth / Height 1 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available No Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Fugro OCEANOR Wavesense Parameter(s)
Platform Buoy Manufacturer Furgo Oceanor
Instrument/Sensor documentation (URL) http://www.oceanor.com/systems/seawatch/buoys-and- sensor/Oceanor-Wavesense
Sensor Type / Model Wave sensor Power Supply
Approximate Depth / Height 0 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available No Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Aanderaa 3919A Parameter(s)
Platform Buoy Manufacturer Aanderaa
Instrument/Sensor documentation (URL) http://www.aanderaa.com/productsdetail.php?Conduct ivity-sensor-9
Sensor Type / Model CT sensor Power Supply
Approximate Depth / Height 1 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available Yes Intercalibration Platform CTD cast / Laboratory
Intercalibration Frequency Yearly
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Seabird 16plus-IMP C-T, Seabird 37-IM C-T Parameter(s)
Platform Mooring Manufacturer Seabird
Instrument/Sensor documentation (URL) http://www.seabird.com/products/spec_sheets/37impd ata.htm
Sensor Type / Model CT sensor Power Supply
Approximate Depth / Height 20, 50, 75, 100, 250, 400, 600, 1000 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available Yes Intercalibration Platform CTD cast / Laboratory
Intercalibration Frequency Yearly
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Seabird 37 C-T Parameter(s)
Platform Seaflo Manufacturer Seabird
Instrument/Sensor documentation (URL) http://www.seabird.com/products/spec_sheets/16plus IMdata.htm
Sensor Type / Model CT sensor Power Supply
Approximate Depth / Height 1670 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available Yes Intercalibration Platform CTD cast / Laboratory
Intercalibration Frequency Yearly
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Aanderaa Optode Parameter(s)
Platform Seaflo Manufacturer Aanderaa
Instrument/Sensor documentation (URL) http://www.aanderaa.com/productsdetail.php?Oxygen- Optodes-2
Sensor Type / Model DO sensor Power Supply
Approximate Depth / Height 1670 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available Yes Intercalibration Platform CTD cast / Laboratory
Intercalibration Frequency Yearly
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Paroscientific Parameter(s) PRES
Platform Seaflo Manufacturer Paroscientific
Instrument/Sensor documentation (URL) http://www.paroscientific.com/depthsensors.htm
Sensor Type / Model Depth sensor Power Supply
Approximate Depth / Height 1670 Sampling interval 10800 second(s)
Calibration Samples Available No Frequency of Calibration Samples
Intercalibration Available No Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments