• Catalogue PIGMA
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Iberia Biscay Ireland significant wave height extreme variability mean and anomaly (observations)

'''DEFINITION'''

The OMI_EXTREME_WAVE_IBI_swh_mean_and_anomaly_obs indicator is based on the computation of the 99th and the 1st percentiles from in situ data (observations). It is computed for the variable significant wave height (swh) measured by in situ buoys. The use of percentiles instead of annual maximum and minimum values, makes this extremes study less affected by individual data measurement errors. The percentiles are temporally averaged, and the spatial evolution is displayed, jointly with the anomaly in the target year. This study of extreme variability was first applied to sea level variable (Pérez Gómez et al 2016) and then extended to other essential variables, sea surface temperature and significant wave height (Pérez Gómez et al 2018).

'''CONTEXT'''

Projections on Climate Change foresee a future with a greater frequency of extreme sea states (Stott, 2016; Mitchell, 2006). The damages caused by severe wave storms can be considerable not only in infrastructure and buildings but also in the natural habitat, crops and ecosystems affected by erosion and flooding aggravated by the extreme wave heights. In addition, wave storms strongly hamper the maritime activities, especially in harbours. These extreme phenomena drive complex hydrodynamic processes, whose understanding is paramount for proper infrastructure management, design and maintenance (Goda, 2010). In recent years, there have been several studies searching possible trends in wave conditions focusing on both mean and extreme values of significant wave height using a multi-source approach with model reanalysis information with high variability in the time coverage, satellite altimeter records covering the last 30 years and in situ buoy measured data since the 1980s decade but with sparse information and gaps in the time series (e.g. Dodet et al., 2020; Timmermans et al., 2020; Young & Ribal, 2019). These studies highlight a remarkable interannual, seasonal and spatial variability of wave conditions and suggest that the possible observed trends are not clearly associated with anthropogenic forcing (Hochet et al. 2021, 2023).

In the North Atlantic, the mean wave height shows some weak trends not very statistically significant. Young & Ribal (2019) found a mostly positive weak trend in the European Coasts while Timmermans et al. (2020) showed a weak negative trend in high latitudes, including the North Sea and even more intense in the Norwegian Sea. For extreme values, some authors have found a clearer positive trend in high percentiles (90th-99th) (Young, 2011; Young & Ribal, 2019).

'''COPERNICUS MARINE SERVICE KEY FINDINGS'''

The mean 99th percentiles showed in the area present a wide range from 2-3.5m in the Canary Island with 0.1-0.3 m of standard deviation (std), 3.5m in the Gulf of Cadiz with 0.5m of std, 3-6m in the English Channel and the Irish Sea with 0.5-0.6m of std, 4-7m in the Bay of Biscay with 0.4-0.9m of std to 8-10m in the West of the British Isles with 0.7-1.4m of std.

Results for this year show close to zero anomalies in the Canary Island (-0.2/+0.1m), the Gulf of Cadiz (-0.2m) and the English Channel and the Irish Sea (-0.1/+0.1), a general slight negative anomaly in the Bay of Biscay reaching -0.7m but inside the range of the standard deviation, and a positive anomaly (+1.0/+1.55m) in the West of the British Isles, barely out of the standard deviation range in the area.

'''DOI (product):'''

https://doi.org/10.48670/moi-00250

Simple

Alternate title
OMI_EXTREME_WAVE_IBI_swh_mean_and_anomaly_obs
Date (Creation)
2023-11-30
Edition
3.4
Edition date
2024-06-18
Identifier
ef932fc0-04e7-4a25-b7b2-08a2d85d4039
Credit
E.U. Copernicus Marine Service Information
Resource provider
  INS-PUERTOS-MADRID-ES -
Maintenance and update frequency
Annually
Other
P0M0D0H/P0M0D0H
Maintenance note
N/A
GEMET - INSPIRE themes, version 1.0
  • Oceanographic geographical features
Discipline
  • in-situ-observation
Temporal scale
  • multi-year
Area of benefit
  • weather-climate-and-seasonal-forecasting
  • coastal-marine-environment
  • marine-safety
  • marine-resources
Reference Geographical Areas
  • iberian-biscay-irish-seas
Processing level
  • N/A
Model assimilation
  • 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
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
cec2bc48-06bc-41cb-913b-599c866a54fe
Association Type
Cross reference
Initiative Type
document
Aggregate Datasetindentifier
a6160dd4-3477-4b07-aac3-752f3868dd5b
Association Type
Cross reference
Initiative Type
document
Aggregate Datasetindentifier
2512e19a-6eb8-47c2-ba70-16347258bcae
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
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
Metadata language
eng
Topic category
  • Oceans
Description
bounding box
N
S
E
W
thumbnail


Begin date
2000-01-01
End date
2021-12-31

Vertical extent

Minimum value
0
Maximum value
0.0
Vertical CRS
  • urn:ogc:def:crs:EPSG:5714
Supplemental Information
display priority: 99999
Reference system identifier
EPSG / WGS 84 (EPSG:4326)
Number of dimensions
2
Dimension name
Row
Dimension name
Column
Cell geometry
Area
Transformation parameter availability
No
Distribution format
  • NetCDF-4 ( )

Distributor

OnLine resource
omi_extreme_wave_ibi_swh_mean_and_anomaly_obs ( WWW:STAC )

For accessing native data and Analysis-ready Cloud-optimized data services, consult this STAC metadata endpoint

OnLine resource
omi_extreme_wave_ibi_swh_mean_and_anomaly_obs ( OGC:WMTS )
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']")
Attribute description
observation
Content type
Physical measurement
Descriptor
vertical level number: 1
Included with dataset
No
Feature types
Grid
File identifier
b477ec44-fecb-43fa-9679-4d10291340c1 XML
Metadata language
English
Character set
UTF8
Hierarchy level
Series
Hierarchy level name
Copernicus Marine Service product specification
Date stamp
2025-04-15T08:49:24.776281Z
Metadata standard name
ISO 19139, MyOcean profile
Metadata standard version
0.2
Point of contact
  CMEMS
http://marine.copernicus.eu/
 
 

Overviews

overview

Spatial extent

N
S
E
W
thumbnail


Keywords

GEMET - INSPIRE themes, version 1.0
Oceanographic geographical features
Model assimilation
Not Applicable

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Associated resources

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