Challenge ID |
C-CORE_OFF1.13 |
Title |
|
Challenge originator: |
|
General Description |
|
What data/products do you use? |
The identification of squalls, as a characterization of transient 10m wind speeds, is essentially limited to surface-based observations, as reported from ships and buoys. The historical records of observed squalls are available via ICOADS. In addition, historical observed squall data are also available from a small number of proprietary measured data sets as indicated in paragraph C.3.2 of ISO 19901-1:2005(E).
|
When do you use this kind of dataset? |
Observations of squalls are used by the O&G industry in squall prone areas for all phases throughout the O&G cycle, except strictly operational tasks. The onset of these events can be sudden and interrupt all kinds of operations on deck, helicopter activity, heavy lifts etc.
|
What are your actual limitations and do you have a work around? |
Squall lines can often be identified from satellite pictures. But the intensity of the convective cell is hard to assess. The temporal and spatial resolutions of surface-based observations significantly limit the identification of squalls, as a characterization of transient 10-meter wind speeds. Unless ships or buoys measure and report squalls, the phenomena are not readily available for analysis over vast areas of the ocean.
|
Needs and expectations on EO data |
EO is used for this today, to spot convective cells and try to assess they movement. However, it is hard to assess the wind speed of each individual cell based on satellite data. Also, the direction of movement for each individual cell is often hard to predict. This leads to unnecessary downtime because of warnings.
|
Challenge classification |
|
Pre license |
1 |
Exp. |
3 |
Dev. |
3 |
Prod. |
4 |
Decom. |
2 |
Geographic context/ restrictions |
Applies to all six Areas of interest.
|
Topographic classification / Offshore classification |
Ocean |
Activity impacted/concerned |
|
Technology Urgency |
Short term (2-5 years) |
Information requirements |
|
Update frequency |
Hourly or 15 mins.
|
Temporal resolution |
At least hourly.
|
Spatial resolution |
4-2 km
|
Data quality |
The selected sources in this document are selected because they are known to have sufficient quality (after some work arounds and adaptations). In general separate indepth verification studies has to be made for each source planned to be used for analysis, and the analysis has to be repeated for each geographical area (since sources might be of sufficient quality in one area but not another). |
Data Coverage and extent |
Regional |
Example format |
Surface-bases observation: text, CSV and/or netCDF |
Timeliness |
Hourly/15 mins. Hourly or more frequent. Forecasts are normally issued 2 to 4 times per day, warnings when thresholds are passed. But O&G users and forecasters are monitoring conditions continuously. |
Existing standards |
Paragraph 2.4.3.3 of DNV-RP-C205 discusses a possible modeling solution for squalls, based on vertical wind profiles, but it is not necessarily applicable beyond the Norwegian Sea.
|