Gridded mean sea level trends over Global Ocean

'''DEFINITION'''

The sea level ocean monitoring indicator is derived from the DUACS delayed-time (DT-2021 version) altimeter gridded maps of sea level anomalies based on a stable number of altimeters (two) in the satellite constellation. These products are distributed by the Copernicus Climate Change Service and are also available in the CMEMS catalogue (SEALEVEL_GLO_PHY_CLIMATE_L4_MY_008_057). The regional sea level trends are derived from a linear fit of the altimeter sea level maps. The altimeter data have not been corrected for the effect of the Glacial Isostatic Adjustment nor the TOPEX-A instrumental drift during the period 1993-1998.

'''CONTEXT'''

Mean sea level evolution has a direct impact on coastal areas and is a crucial index of climate change since it reflects both the amount of heat added in the ocean and the mass loss due to land ice melt (e.g. IPCC, 2013; Dieng et al., 2017). Long-term and inter-annual variations of the sea level are observed at global and regional scales. They are strongly related to the internal variability observed at basin scale and these variations can strongly affect population living in coastal areas.

'''CMEMS KEY FINDINGS'''

The altimeter mean sea level trends since 1993 exhibit large-scale variations with amplitudes reaching up to +8 mm/yr in regions such as the western tropical Pacific Ocean. In this area, trends are mainly of thermosteric origin (Legeais et al., 2016; Meyssignac et al., 2017) in response to increased easterly winds during the last two decades associated with the decreasing Interdecadal Pacific Oscillation (IPO)/Pacific Decadal Oscillation (e.g. McGregor et al. 2012; Merrifield et al. 2012; Palanisamy et al. 2014; Han et al. 2010; Rietbroek et al. 2016).

Prandi et al. (2021) have estimated a regional altimeter sea level error budget from which they determine a regional error variance-covariance matrix and they provide uncertainties of the regional sea level trends. Only the contribution of the measurement system is considered (the contribution from the ocean natural variability is not considered). Over 1993-2019, the averaged local sea level trend uncertainty is around 0.83 mm/yr with local values ranging from 0.78 to 1.22 mm/yr.

'''DOI (product):'''

https://doi.org/10.48670/moi-00238

 
Citation proposal
Yannice Faugère (SL-CLS-TOULOUSE-FR). Gridded mean sea level trends over Global Ocean. https://services.mspdata.eu:/geonetwork/srv/api/records/dffff66f-9b67-4f75-8ee9-2d4b602576a0

Simple

Alternate title
GLOBAL_OMI_SL_regional_trends
Date ( Creation )
2018-02-13
Edition
3.4
Edition date
2012-08-28
Identifier
dffff66f-9b67-4f75-8ee9-2d4b602576a0
Credit
E.U. Copernicus Marine Service Information

  Custodian

  Originator

  Point of contact

  Resource provider

  Distributor

Maintenance and update frequency
Annually
Other
P0M0D0H/P0M0D0H
Maintenance note
N/A
Maintenance and update frequency
Irregular
GEMET - INSPIRE themes, version 1.0 ( Theme )
  • Oceanographic geographical features
Discipline ( Discipline )
  • satellite-observation
Climate and Forecast Standard Names ( parameter )
  • tendency_of_sea_surface_height_above_sea_level
Temporal scale ( temporal-scale )
  • multi-year
Area of benefit ( area-of-benefit )
  • coastal-marine-environment , weather-climate-and-seasonal-forecasting , marine-resources , marine-safety
Reference Geographical Areas ( reference-geographical-area )
  • global-ocean
Processing level ( processing-level )
  • N/A
Model assimilation ( Theme )
  • 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
Access constraints
Other restrictions
Use constraints
License
Other constraints
No limitations on public access
Aggregate Datasetindentifier
90d29bd4-bed9-4670-bfb4-0560bc4f72f9
Association Type
Cross reference
Initiative Type
document
Date ( Creation )
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Date ( Creation )
2019-05-08
Association Type
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Initiative Type
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Date ( Creation )
2019-05-08
Association Type
Cross reference
Initiative Type
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Date ( Creation )
2019-05-08
Association Type
Cross reference
Initiative Type
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Date ( Creation )
2019-05-08
Association Type
Cross reference
Initiative Type
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Date ( Creation )
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Date ( Creation )
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Date ( Creation )
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Date ( Creation )
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Date ( Creation )
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Aggregate Datasetindentifier
24399cda-5e1e-4e66-ab8d-b91f33f2ff14
Association Type
Cross reference
Initiative Type
document
Aggregate Datasetindentifier
4697158e-924e-40f8-9ae8-20ff47415b6f
Association Type
Cross reference
Initiative Type
document
Date ( Creation )
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Metadata language
eng
Topic category
  • Oceans
Description
bounding box
N
S
E
W


Vertical extent

Minimum value
0
Maximum value
0.0
Vertical CRS
Supplemental Information
display priority: 50605
Reference system identifier
EPSG / WGS 84 (EPSG 4326)
Number of dimensions
2
Dimension name
Row
Resolution
0.25  degree
Dimension name
Column
Resolution
0.25  degree
Cell geometry
Area
Transformation parameter availability
false
Distribution format
  • NetCDF-4 ( )

OnLine resource
global_omi_sl_regional_trends  
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

File identifier
dffff66f-9b67-4f75-8ee9-2d4b602576a0   XML
Metadata language
English
Character set
UTF8
Hierarchy level
Series
Hierarchy level name
Copernicus Marine Service product specification
Date stamp
2021-12-13T12:56:59
Metadata standard name
ISO 19139, MyOcean profile
Metadata standard version
0.2

  Point of contact

Website
http://marine.copernicus.eu/  
 
 

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