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DBCP issues for OOPC. Boram Lee IOC Secretariat for JCOMM. Requirement on SST Measurement Requirement on Wave Measurement Any other issue(s). Requirement on SST Measurement. DBCP Data Users and Technology Workshop (27-28 March 2006, Reading) Requirements expressed for drifter SST

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Dbcp issues for oopc

DBCP issues for OOPC

Boram Lee

IOC Secretariat for JCOMM

OOPC-XII, Paris, 2-5 May 2007


OOPC-XII, Paris, 2-5 May 2007


Requirement on sst measurement
Requirement on SST Measurement

DBCP Data Users and Technology Workshop (27-28 March 2006, Reading)

  • Requirements expressed for drifter SST

    • Predicting AT, RH, through satellite SST and wind

    • SST analysis (e.g. Reynolds) for NWP and ocean/climate modelling

    • GHRSST: Resolving the SST Diurnal Cycle globally, seasonally in extreme events.

  • Workshop agreed that this was feasible and asked DBCP to proceed

  • DBCP-22 asked OOPC to provide detailed rationale and documentation for this requirement

OOPC-XII, Paris, 2-5 May 2007


Requirement on sst measurement1
Requirement on SST Measurement

Timeliness (driven by NWP requirements)

  • better Argos network of local receiving stations,

  • use of Argos multi-satellite service, and

  • use of other satellite data telecommunications systems (e.g. Iridium)

    Resolution: “provide for hourly data, at the hour”

    Quality

  • existing quality information monitoring activities and feed back mechanisms (e.g. buoy QC guidelines)

  • Advertise known quality of buoy data in order to build confidence

    Quantity

  • Increase deployments or deployment strategies in certain regions ↔ Capacity Building, Coordinate with GOOS Regional Alliance

OOPC-XII, Paris, 2-5 May 2007


Requirement on sst measurement2
Requirement on SST Measurement

SST: High resolution hourly data required for diurnal cycle resolution

OOPC-XII, Paris, 2-5 May 2007


Requirement on sst measurement3
Requirement on SST Measurement

Issues: “hourly data, at the hour”

  • Stable clock adds cost

    • e.g., controller with Temp Compensated Crystal Oscillator, ±1 min/yr at 0—40ºC.

  • GPS adds cost but …

    • provides additional location, accuracy, frequency

  • Argos does not provide for real-time hourly reports

    What is an “hourly” SST value? Instantaneous value at top of hour, average over surrounding 15 minutes, or 60 minutes?

OOPC-XII, Paris, 2-5 May 2007


Requirement on sst measurement4
Requirement on SST Measurement

OOPC-XII, Paris, 2-5 May 2007


Requirement on sst measurement5
Requirement on SST Measurement

Recommendations to OOPC:

  • Precise statement of OOPC requirements needed to ascertain whether/what new technological developments are required

    • real time requirements

    • clarification of the definition of hourly SST value

      • sampling period

      • averaging period

      • averaging period ending on the hour or centred on the hour

      • timing accuracy, etc.

  • advise on technical solutions (adding a temperature compensated crystal oscillator (TCXO) or using GPS)

    The DBCP Evaluation Group will look at practical technical solutions in more detail and work on cost impacts once the requirements became available.

OOPC-XII, Paris, 2-5 May 2007


Requirement on enhanced high quality long term wave measurements
Requirement on enhanced high-quality, long-term wave measurements

Needs for:

  • Ocean wave climatology and variability;

  • Air-sea interaction;

  • Assimilation into offshore wave forecast models;

  • Validation of wave forecast models;

  • Calibration / validation of satellite wave sensors.

    The primary requirement: additional wave measurements

  • Comprising (at a minimum) significant wave height, peak period and 1-D spectra, hourly in real-time, for assimilation into coupled atmosphere-ocean wave models for real-time forecasting activities, and subsequent verification

OOPC-XII, Paris, 2-5 May 2007


Requirement on enhanced high quality long term wave measurements1
Requirement on enhanced high-quality, long-term wave measurements

Currently, the vast majority of existing wave measurements were made in the coastal margins of North America and western Europe, with a huge data void in most of the rest of the global ocean, particularly in the southern ocean and the tropics.

* Non-moored wave observations

OOPC-XII, Paris, 2-5 May 2007


Requirement on enhanced high quality long term wave measurements2
Requirement on enhanced high-quality, long-term wave measurements

DBCP-22 (October 2006, La Jolla)

  • recommend adding wave measurements to the DBCP Implementation Strategy;

  • invite buoy operators and Panel Members to increase wave measurements, particularly from open ocean areas, in the Southern Ocean, and the tropics;

  • invite the DBCP Evaluation Group to address wave measurement technology issues and to communicate with the ETWS and OOPC on user requirements;

  • recommend JCOMM/OCG to address the broader issues in terms of technological development and implementation, including wave measurements from Ocean Sites, Argo, drifters, Triton/TAO/PIRATA and shipboard systems;

  • urge the ETWS to work with the JCOMM OPA to put forward a more detailed set of requirements for additional high-quality wave measurements

OOPC-XII, Paris, 2-5 May 2007


Requirement on enhanced high quality long term wave measurements3
Requirement on enhanced high-quality, long-term wave measurements

ETWS draft of the table:

Requirements for surface wave observations http://www.jcomm-services.org/ETWS-Observation-Requirements.html

Advice/Comments ?

OOPC-XII, Paris, 2-5 May 2007


Other issue s
Other Issue(s)

What new variables might in due course be

usefully implemented on data buoys (e.g. pCO2) ?

OOPC-XII, Paris, 2-5 May 2007


Dbcp status
DBCP status

OOPC-XII, Paris, 2-5 May 2007


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