Historic records for currents at depth
Challenge ID |
C-CORE_OFF1.4 |
Title |
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Challenge originator: |
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General Description |
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What data/products do you use? |
Historical ocean currents data for currents at depth are available via different agencies. They are either based on reanalysis, hindcast model data or derived from satellite observations. Quality is lower than for the surface currents due to fewer observations.
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When do you use this kind of dataset? |
Historical ocean current data at depth are used to great extent in all phases of the O&G cycle, except strictly operational tasks.
Finally surface current data are important to design of structures that can withstand the local conditions and take into account the risk of the extreme situations of the area. |
What are your actual limitations and do you have a work around? |
Same as for wind and wave, only that data of sufficient quality is very rare. Most of this is due to the limited access to observations of currents at dept. Most current observations are made at the surface. In addition data of sufficient quality can be even harder to come by in coastal and remote/less developed areas. Modelled data has low quality for on shorter time scales, while climatology is of sufficient quality. These data rarely catch short lived and small scale extremes.
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Needs and expectations on EO data |
EO cannot be used for this today.
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Challenge classification |
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Pre license |
3 |
Exp. |
4 |
Dev. |
4 |
Prod. |
3 |
Decom. |
3 |
Geographic context/ restrictions |
Applies to all six areas of interest, except for the cautionary notes about tropical cyclones, which only applies to South China Sea, West of Ireland, and Myanmar.
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Topographic classification / Offshore classification |
Ocean |
Activity impacted/concerned |
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Technology Urgency |
Short term (2-5 years) |
Information requirements |
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Update frequency |
Available today: |
Temporal resolution |
Data should be at least 1-3 hourly resolution depending on area and phenomena needed to be resolved.
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Spatial resolution |
Around 4 km, maybe less in coastal areas.
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Data quality |
The selected sources in this document are selected because they are known to have sufficient quality (after some work around/adaptation). 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 |
CSV and/or netCDF |
Timeliness |
Normally needed urgently, possibly before assessing, planning, or exploring a new field. Hence the data source used for analysis needs to be frequently updated to avoid unnecessary waiting. Daily, weekly or monthly updates of data sets are sufficient, depending on the analysis required. |
Existing standards |
In addition, DNV-RP-C205, ISO-19001-1, and DNV-OS-J001 contain cautionary notes regarding the treatment of waves in areas that experience tropical cyclones, such as South China Sea, West of Ireland, and Myanmar. |
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