HELCOM Metadata catalogue
Relative distribution of nutrient concentration - Total Nitrogen (HOLAS 2)
Concentration of nitrogen pressure layer is interpolated from annual seasonal average of total nitrogen concentrations from surface waters (0-10 m) extracted from ICES’s oceanographic database, database of Swedish Meteorological and Hydrological Institute, EEA’s Eionet database and Data from Gulf of Finland year 2014.
The points were interpolated to cover the entire Baltic Sea with Spline with barriers interpolation method. Values were log-transformed and normalised (more detailed description below).
Simple
- Date (Creation)
- 2018-01-15
- Unique resource identifier
- https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/5e982b25-8110-4095-b6db-619947f52f4e
-
GEMET - INSPIRE themes, version 1.0
-
-
Bio-geographical regions
-
-
GEMET
-
-
environmental impact
-
nitrogen
-
- Keywords
-
-
MADS
-
HOLAS2
-
- Use constraints
- Other restrictions
- Other constraints
-
Use constraints: Data can be used freely given that the source is cited.
- Access constraints
- Other restrictions
- Other constraints
- Access constraints: No limitations on public access.
- Spatial representation type
- Grid
- Metadata language
- English
- Topic category
-
- Environment
))
- Begin date
- 2011-01-01
- End date
- 2016-12-13
- Unique resource identifier
- EPSG:3035
- Distribution format
-
-
TIFF
(
)
-
TIFF
(
)
- OnLine resource
- Download dataset ( WWW:LINK-1.0-http--link )
- OnLine resource
- Open in Map Viewer ( WWW:LINK-1.0-http--link )
- Hierarchy level
- Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Statement
-
Point wise concentration values (µmol / l) were aggregated to 5x5km grid and annual seasonal averages (2011-2016) were calculated per grid cell (winter: december, january, february; spring: march, april, may; summer: june, july, august; autumn: september, october, november). Grid values were interpolated to 1x1km grid with "spline with barriers" method. A mild generalisation was applied for the layer.
All values above 95 percentile and under 5 percentile were grouped together to avoid over-influence of extreme values. Layer was log-transformed and normalised.
Data source:
ICES’s oceanographic database ( http://www.ices.dk/marine-data/data-portals/Pages/ocean.aspx), For Sweden: SMHI ( http://www.smhi.se/klimatdata/oceanografi/havsmiljodata/marina-miljoovervakningsdata), eionet ( https://www.eionet.europa.eu/), Gulf of Finland year 2014.
Data quality: Not known gaps
Attribute information: Pressure value
Spatial coverage: Entire Baltic Sea.
Spatial resolution: Original data as points, interpolated to 1 km x 1 km grid.
- File identifier
- 5e982b25-8110-4095-b6db-619947f52f4e XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2023-03-15T14:44:25
Overviews
Spatial extent
Provided by
