Published August 31, 2024 | Version v1
Dataset Open

Data and code for the article "Event-based wave statistics for the Baltic Sea" by Björkqvist et al. (2024)

Creators

  • 1. Finnish Meteorological Institute

Contributors

Description

This dataset gives information about modelled significant wave height events exceeding 2.5 m, 4 m and 7 m over the Baltic Sea. The maximum value of significant wave height of each event where given threshold is exceeded is saved together with the time and duration of the events (as hours since 1/1/1993). Also, peak period and corresponding direction of the waves is given at time of maximum wave height. Dataset is calculated for time period of 1/1/1993 to 31/12/2021 from Baltic Sea Wave Hindcast by Copernicus Marine Services (https://doi.org/10.48670/moi-00014). Results are published in article "Event-based wave statistics for the Baltic Sea" (https://doi.org/10.5194/sp-2023-16).

Methods

Methods of calculating event-based statistics is described in the linked article (https://doi.org/10.5194/sp-4-osr8-10-2024) published in Ocean State Report 8. Scripts used for this paper are under Exceedance_analysis.tar. Latest version of the scripts is available at (https://github.com/hkanarik/Exeedance_analysis/). Scripts include methods to produce the dataset and examples on producing the figures for the publication.

Table of contents

Exceedance_analysis-main.zip: Python scripts for producing the dataset and creating the figures. For detailed info of the scripts read included README.md. VHM0_exceendaces*over_1timestamps_199301-202112.nc.gz: Netcdf files with information on exceedance events. Each exceedance level is given in a separate file. As files with 2.5 m exceedance are so large, the file has been divided to different sea areas. Variable names are explained under Metadata info. CaseStudy-file only includes small area in southeastern Bothnian Sea for cases exceeding 1 m significant wave height, presented in the article chapter 3.3.5 Coastal case study. Statistics_exceedance_over_*m.nc: Netcdf files with statistics presented in the article (calculated from VHM0_exceendaces* -files).

Files

Exeedance_analysis-main.zip

Files (1.3 GB)

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Additional details

Identifiers

URL
https://etsin.fairdata.fi/dataset/6db9e91c-3b03-4415-a382-60684aa9d79c
b2rec
fad6a08688ab493b9f8e5d0fdf5db432

Related works

Is published in
Other: 10.5194/sp-2023-16 (DOI)

Funding

The European Maritime and Fisheries Fund and the E.U. Copernicus Marine Service Programme

FMI metadata

Process step
Calculated using python scripts available in Exceedance_analysis-main.tar
Lineage
Data is calculated from Baltic Sea Wave Hindcast available from Copernicus Marine Services (https://doi.org/10.48670/moi-00014). Quality information document is available through the website.
Model
WAM. Version used by Copernicus Marine Services BAL MFC product https://doi.org/10.48670/moi-00014
Parameter
  • Parameter name: block
  • Parameter unit: h
  • Parameter description: The number of hours where significant wave height (VHM0) exceeds set threshold value. Same as event duration
  • Parameter name: maxtime
  • Parameter unit:
  • Parameter description: Indexes where significant wave height (VHM0) exceeding set threshold value had its maximum value. Maxtime represents hours since the start time of 1993-01-01 01:00.
Resolution
1
Resolution unit
nmi
Supplemental information
Some files have smaller area withing presented lat/lon bounds. Location information is given in each netcdf file.
Topic category
oceans

Temporal Coverage

Ranges:

Start date: 1992-12-31
End date: 2021-12-30

Spans:

Span:Hourly

Locations

Baltic Sea Envelope:
(Lon: 65.907776, Lat: 9.013887 )
(Lon: 53.00829, Lat: 30.207739 )