1. EMODnet Chemistry 3 1st TWG meeting, 4-5 April 2017
Updating ODV format guidelines and possible templates for different matrices.
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2. Data Templates Current information available:
Templates for dataset on:
Vertical profiles
Time series
Water
Sediment (?)
Biota (?)
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3. Data Templates Vertical profiles:
Profile data have row_groups made up of measurements at different depths. The primary variable is the ‘z co-ordinate’, which is either depth in metres or pressure in decibars.
Used for stations usually not repeated regularly over time, for which several depths are sampled. Typical examples:
CTD profiles, bottle stations (chemical data, chlorophyll, plankton,…) (water and biota)
Vertical profiles:
CTD + other sensors
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4. Data Templates Time series:
Point time series have row_groups made up of measurements from a given instrument at different times. The primary variable is time.
Used for the same station repeated regularly over time, for which usually a single depth is sampled. Typical examples:
biota composition (contaminants in biota), sediment composition, mooring data (eg. MAMBO buoy)
Time series:
Bottle data
Sediment data
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5. Data Templates Guidelines for sediment data: Time series:
Point time series have row_groups made up of measurements at different times. The primary variable is time.
Sampling device:
Grab
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6. Data Templates Guidelines for sediment data: Profiles:
Profile data have row_groups made up of measurements at different depths. The primary variable is the ‘z co-ordinate’, which is core-dist.
Proposal:
addition of Core TopDepth and Core BottomDepth to keep originator information
Sampling device:
core
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7. Data Templates Guidelines for sediment data: Sampling device: core
MINCDIST
Minimum depth below surface of the bed
MinDepBelowBed
The minimum distance between part of a sample and the seabed such as the distance between the top of a core segment and the top of a core.
COREDIST
Depth below surface of the bed
DepBelowBed
The distance of a sensor or sampling point below the floor of a water body
MAXCDIST
Maximum depth below surface of the bed
MaxDepBelowBed
The maximum distance between part of a sample and the seabed such as the distance between the base of a core segment and the top of a core.
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8. Data Templates
Guidelines for biota composition (eg. contaminants in biota) data:
Time series (please confirm):
Point time series have row_groups made up of measurements at different times. The primary variable is time.
However, cases of same time, same Lon./Lat., … !
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9. Data Templates Particular cases to agree: Issues for products:
Sediment Time series with several depths?
Several time-series depths (eg. from mooring)?
Different stations sampled once at only one depth (eg. surface sediment, biota): profiles?
Issues for products:
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10. Issues from EMODnet Chemistry 2:
Primary variable for sediment and biota
Other???
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