Baltic Sea Subsurface salinity trend
'''DEFINITION'''
The subsurface salinity trends have been derived from regional reanalysis and forecast modelling results of the CMEMS BAL MFC group for the Baltic Sea (product references BALTICSEA_REANALYSIS_PHY_003_011). The salinity trend has been obtained through a linear fit for each time series of horizontally averaged (13 °E - 31 °E and 53 °N - 66 °N; excluding the Skagerrak strait) annual salinity and at each depth level (Mulet et al., 2018).
'''CONTEXT'''
The Baltic Sea is a brackish semi-enclosed sea in North-Eastern Europe. The surface salinity varies horizontally from ~10 near the Danish Straits down to ~2 at the northernmost and easternmost sub-basins of the Baltic Sea. The halocline, a vertical layer with rapid changes of salinity with depth that separates the well-mixed surface layer from the weakly stratified layer below, is located at the depth range of 60-80 meters (Matthäus, 1984). The bottom layer salinity below the halocline depth varies from 15 in the south down to 3 in the northern Baltic Sea (Väli et al., 2013). The long-term salinity is determined by net precipitation and river discharge as well as saline water inflows from the North Sea (BACCII Author Team, 2015). Long-term salinity decrease may reduce the occurrence and biomass of the Fucus vesiculosus - Idotea balthica association/symbiotic aggregations (Kotta et al., 2019). Changes in salinity and oxygen content affect the survival of the Baltic cod eggs (Raudsepp et al, 2019; von Dewitz et al., 2018).
'''CMEMS KEY FINDINGS'''
The subsurface salinity over the 1993-2020 period shows no trend in the surface layer of 40-m. Then, the trend increases monotonically until the depth of 80-m, where it reaches the value of about 0.04 per year. Below that depth the salinity trend is uniform within the uncertainty limits.
'''DOI (product):'''
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Citation proposal
Vibeke HUESS (BAL-DMI-COPENHAGEN-DK). Baltic Sea Subsurface salinity trend. https://services.mspdata.eu:/geonetwork/srv/api/records/ac5e6323-76fb-4b8d-9e65-9bf4bd4bd5b4 |
Simple
- Alternate title
- BALTIC_OMI_TEMPSAL_Stz_trend
- Date ( Creation )
- 2019-11-28
- Edition
- 3.4
- Edition date
- 2019-11-28
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- a78600a4-a280-47b5-8ddd-0dc8b5e9c9d9
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- E.U. Copernicus Marine Service Information
Custodian
Originator
Point of contact
Resource provider
Distributor
- Maintenance and update frequency
- Annually
- Other
- P0M0D0H/P0M0D0H
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- N/A
- GEMET - INSPIRE themes, version 1.0 ( Theme )
-
- Oceanographic geographical features
- Discipline ( Discipline )
-
- numerical-model
- Climate and Forecast Standard Names ( parameter )
-
- sea_water_salinity_trend , confidence interval
- Temporal scale ( temporal-scale )
-
- multi-year
- Area of benefit ( area-of-benefit )
-
- coastal-marine-environment , weather-climate-and-seasonal-forecasting , marine-safety , marine-resources
- Reference Geographical Areas ( reference-geographical-area )
-
- baltic-sea
- Processing level ( processing-level )
-
- N/A
- Model assimilation ( Theme )
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- Not Applicable
- Use limitation
- See Copernicus Marine Environment Monitoring Service Data commitments and licence at: http://marine.copernicus.eu/web/27-service-commitments-and-licence.php
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- Other restrictions
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- Date ( Creation )
- 2019-05-08
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Vertical extent
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- NetCDF-4 ( )
Distributor
- OnLine resource
- baltic_omi_tempsal_Stz_area_averaged_trend
- Hierarchy level
- Series
Conformance result
- Date ( Publication )
- 2010-12-08
- Explanation
- See the referenced specification
- Statement
- The myOcean products depends on other products for production or validation. The detailed list of dependencies is given in ISO19115's aggregationInfo (ISO19139 Xpath = "gmd:MD_Metadata/gmd:identificationInfo/gmd:aggregationInfo[./gmd:MD_AggregateInformation/gmd:initiativeType/gmd:DS_InitiativeTypeCode/@codeListValue='upstream-validation' or 'upstream-production']")
Metadata
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- ac5e6323-76fb-4b8d-9e65-9bf4bd4bd5b4 XML
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- English
- Character set
- UTF8
- Hierarchy level
- Series
- Hierarchy level name
- Copernicus Marine Service product specification
- Date stamp
- 2021-12-10T14:02:27
- Metadata standard name
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- Metadata standard version
- 0.2
Point of contact
- Website
- http://marine.copernicus.eu/