• Metadata catalogue
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IBI Strong Wave Incidence index

'''DEFINITION'''

The Strong Wave Incidence index is proposed to quantify the variability of strong wave conditions in the Iberia-Biscay-Ireland regional seas. The anomaly of exceeding a threshold of Significant Wave Height is used to characterize the wave behavior. A sensitivity test of the threshold has been performed evaluating the differences using several ones (percentiles 75, 80, 85, 90, and 95). From this indicator, it has been chosen the 90th percentile as the most representative, coinciding with the state-of-the-art.

Two CMEMS products are used to compute the Strong Wave Incidence index:

• IBI-WAV-MYP: IBI_REANALYSIS_WAV_005_006

• IBI-WAV-NRT: IBI_ANALYSIS_FORECAST_WAV_005_005

The Strong Wave Incidence index (SWI) is defined as the difference between the climatic frequency of exceedance (Fclim) and the observational frequency of exceedance (Fobs) of the threshold defined by the 90th percentile (ThP90) of Significant Wave Height (SWH) computed on a monthly basis from hourly data of IBI-WAV-MYP product:

SWI = Fobs(SWH > ThP90) – Fclim(SWH > ThP90)

Since the Strong Wave Incidence index is defined as a difference of a climatic mean and an observed value, it can be considered an anomaly. Such index represents the percentage that the stormy conditions have occurred above/below the climatic average. Thus, positive/negative values indicate the percentage of hourly data that exceed the threshold above/below the climatic average, respectively.

'''CONTEXT'''

Ocean waves have a high relevance for coastal ecosystems and humans. Extreme wave events can entail severe impacts over human infrastructures and coastal dynamics as expressed through he incidence of severe (90th percentile) wave events . The Strong Wave Incidence index based on the CMEMS regional analysis and reanalysis product provides information on the frequency of severe wave events.

The IBI-MFC covers the European Atlantic coast in a region bounded by the 26ºN and 56ºN parallels, and the 19ºW and 5ºE meridians. The western European coast is located at the end of the long fetch of the subpolar North Atlantic (Mørk et al., 2010), one of the world’s greatest wave generating regions (Folley, 2017). Several studies have analyzed changes of the ocean wave variability in the North Atlantic Ocean (Bacon and Carter, 1991; Kursnir et al., 1997; WASA Group, 1998; Bauer, 2001; Wang and Swail, 2004; Dupuis et al., 2006; Wolf and Woolf, 2006; Dodet et al., 2010; Young et al., 2011; Young and Ribal, 2019). The observed variability is composed of fluctuations ranging from the weather scale to the seasonal scale, together with long-term fluctuations on interannual to decadal scales associated with large-scale climate oscillations. Since the ocean surface state is mainly driven by wind stresses, part of this variability in Iberia-Biscay-Ireland region is connected to the North Atlantic Oscillation (NAO) index (Bacon and Carter, 1991; Hurrell, 1995; Bouws et al., 1996, Bauer, 2001; Woolf et al., 2002; Tsimplis et al., 2005; Gleeson et al., 2017). However, later studies have quantified the relationships between the wave climate and other atmospheric climate modes such as the East Atlantic pattern, the Arctic Oscillation pattern, the East Atlantic Western Russian pattern and the Scandinavian pattern (Izaguirre et al., 2011, Matínez-Asensio et al., 2016).

The Strong Wave Incidence index provides information on incidence of stormy events in four monitoring regions in the IBI domain. The selected monitoring regions are aimed to provide a summarized view of the diverse climatic conditions in the IBI regional domain: Wav1 region monitors the influence of stormy conditions in the West coast of Iberian Peninsula, Wav2 region is devoted to monitor the variability of stormy conditions in the Bay of Biscay, Wav3 region is focused in the northern half of IBI domain, this region is strongly affected by the storms transported by the subpolar front, and Wav4 is focused in the influence of marine storms in the North-East African Coast, the Gulf of Cadiz and Canary Islands.

More details and a full scientific evaluation can be found in the CMEMS Ocean State report (Pascual et al., 2020).

'''CMEMS KEY FINDINGS'''

The analysis of the index in the last decades do not show significant trends of the strong wave conditions over the period 1992-2019 with 99% confidence. The maximum wave event reported in region WAV1 (B) occurred in February 2014, it produced an increment of 34% of strong wave conditions in the region. The maximum wave event found in WAV2 (C) implied an increment of 30% of high wave conditions in February 2014; additionally, the region show another significant storm in November 2009 that produced an increment of 28% of high wave conditions. As in regions WAV1 and WAV2, in the region WAV3 (D), a strong wave event took place in February 2014, this event is the maximum event reported in the region with an increment of strong wave conditions of 22%, two months before (December 2013) there was a storm of similar characteristics affecting this region. The region WAV4 (E) present its maximum wave event in December 2000, such event produced a 33% of increment of strong wave conditions in the region. Despite of each monitoring region is affected by independent wave events; the analysis shows several past higher-than-average wave events that were propagated though several monitoring regions: November-December 2010 (WAV3 and WAV2); February 2014 (WAV1, WAV2, and WAV3); and November-December 2019 (WAV1 and WAV4). The analysis of the NRT period (2020 onwards) depicts a significant stormy event affecting the WAV3 region in February 2020 (increment of 20% of high wave conditions).

'''DOI (product):'''

https://doi.org/10.48670/moi-00251

 
Citation proposal
Marcos Gacía (IBI-PUERTOS-MADRID-ES). IBI Strong Wave Incidence index. https://services.mspdata.eu:/geonetwork/srv/api/records/1d7dfa41-a5c9-4b12-9088-97f862006b81

Simple

Alternate title
IBI_OMI_SEASTATE_swi
Date ( Creation )
2020-06-18
Edition
3.4
Edition date
2020-06-18
Identifier
a78600a4-a280-47b5-8ddd-0dc8b5e9c9d9
Credit
E.U. Copernicus Marine Service Information

  Custodian

IBI-PUERTOS-MADRID-ES - Marcos Gacía  

  Originator

IBI-PUERTOS-MADRID-ES - Álvaro de Pascual  

  Point of contact

IBI-PUERTOS-MADRID-ES - IBI Service Desk  

  Resource provider

IBI-PUERTOS-MADRID-ES - Arancha Amo  

  Distributor

MOI-OMI-SERVICE - MOI-OMI-SERVICE  

Maintenance and update frequency
Annually
Other
P0M0D0H/P0M0D0H
Maintenance note
N/A
GEMET - INSPIRE themes, version 1.0 ( Theme )
  • Oceanographic geographical features
Discipline ( Discipline )
  • numerical-model
Climate and Forecast Standard Names ( parameter )
Temporal scale ( temporal-scale )
  • multi-year
Area of benefit ( area-of-benefit )
  • marine-safety , marine-resources , weather-climate-and-seasonal-forecasting , coastal-marine-environment
Reference Geographical Areas ( reference-geographical-area )
  • iberian-biscay-irish-seas
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
Date ( Creation )
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Date ( Creation )
2019-05-08
Association Type
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Date ( Creation )
2019-05-08
Association Type
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Date ( Creation )
2019-05-08
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Date ( Creation )
2019-05-08
Association Type
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Date ( Creation )
2019-05-08
Association Type
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Date ( Creation )
2019-05-08
Association Type
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Date ( Creation )
2019-05-08
Association Type
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Date ( Creation )
2019-05-08
Association Type
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Date ( Creation )
2019-05-08
Association Type
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Date ( Creation )
2019-05-08
Association Type
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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
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reference
Date ( Creation )
2019-05-08
Association Type
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Initiative Type
reference
Date ( Creation )
2019-05-08
Association Type
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reference
Date ( Creation )
2019-05-08
Association Type
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reference
Date ( Creation )
2019-05-08
Association Type
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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
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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
120b0ec7-e6bc-46dd-8f15-07b5eac7afc7
Association Type
Cross reference
Initiative Type
document
Aggregate Datasetindentifier
895d7e1c-909c-4786-963d-4b7e4f81d9a8
Association Type
Cross reference
Initiative Type
document
Aggregate Datasetindentifier
4ed43efe-8cde-46dc-8f62-315f688f3169
Association Type
Cross reference
Initiative Type
document
Metadata language
eng
Topic category
  • Oceans
Description
bounding box
N
S
E
W


Vertical extent

Minimum value
0
Maximum value
0
Vertical CRS
  •   urn:ogc:def:crs:EPSG:5714
Supplemental Information
display priority: 53800
Unique resource identifier
Codespace
EPSG
Number of dimensions
2
Dimension name
Row
Resolution
0.01  degree
Dimension name
Column
Resolution
0.01  degree
Cell geometry
Area
Transformation parameter availability
false
Distribution format
  • NetCDF-4 ( )

Distributor

OnLine resource
ibi_omi_seastate_swi_anomaly  
OnLine resource
ibi_omi_seastate_swi_mean_percentile  
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
1d7dfa41-a5c9-4b12-9088-97f862006b81   XML
Metadata language
English
Character set
UTF8
Hierarchy level
Series
Hierarchy level name
Copernicus Marine Service product specification
Date stamp
2021-12-10T16:30:51
Metadata standard name
ISO 19139, MyOcean profile
Metadata standard version
0.2

  Point of contact

CMEMS  

Website
http://marine.copernicus.eu/  
 
 

  Overviews


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