Locally calibrated wave hindcasts in the Estonian coastal sea in 1966–2011

Wave parameters were studied in four differently exposed fetch-limited Estonian coastal sea locations: the Harilaid Peninsula facing W–NW, Letipea N–NE, Matsi SW and Kõiguste SE. Based on high-quality measurements of waves with the bottom-mounted Recording Doppler Current Profiler in 2006–2011, a mo...

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Main Author: Ülo Suursaar
Format: Article
Language:English
Published: Estonian Academy Publishers 2013-02-01
Series:Estonian Journal of Earth Sciences
Subjects:
Online Access:http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2013/issue_1/earth-2013-1-42-56.pdf
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author Ülo Suursaar
author_facet Ülo Suursaar
author_sort Ülo Suursaar
collection DOAJ
description Wave parameters were studied in four differently exposed fetch-limited Estonian coastal sea locations: the Harilaid Peninsula facing W–NW, Letipea N–NE, Matsi SW and Kõiguste SE. Based on high-quality measurements of waves with the bottom-mounted Recording Doppler Current Profiler in 2006–2011, a model for significant wave height was calibrated separately for those locations. Using wind forcing data from Estonian coastal meteorological stations, a set of hindcasts was obtained over the period of 1966–2011. The wave heights showed some quasi-periodic cycles with a high stage in 1980–1995, and probably also from 2007; a prevailing overall decrease in the mean wave height; an increase in high wave events at the windward coasts of West Estonia but a decrease at the northern and southeastern coasts. The spatially contrasting results for differently exposed coasts reflect the corresponding variations in local wind, which are probably caused by changes in large-scale atmospheric pressure patterns above Northern Europe and a poleward shift of cyclones’ trajectories. Although featuring outstanding calibration results, the long-term wave hindcast may be impacted by possible inhomogeneities in the older wind data.
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spelling doaj.art-cd7aab85fb154764b6d2925f0b4cf1102022-12-21T23:31:53ZengEstonian Academy PublishersEstonian Journal of Earth Sciences1736-47281736-75572013-02-01621425610.3176/earth.2013.05Locally calibrated wave hindcasts in the Estonian coastal sea in 1966–2011Ülo SuursaarWave parameters were studied in four differently exposed fetch-limited Estonian coastal sea locations: the Harilaid Peninsula facing W–NW, Letipea N–NE, Matsi SW and Kõiguste SE. Based on high-quality measurements of waves with the bottom-mounted Recording Doppler Current Profiler in 2006–2011, a model for significant wave height was calibrated separately for those locations. Using wind forcing data from Estonian coastal meteorological stations, a set of hindcasts was obtained over the period of 1966–2011. The wave heights showed some quasi-periodic cycles with a high stage in 1980–1995, and probably also from 2007; a prevailing overall decrease in the mean wave height; an increase in high wave events at the windward coasts of West Estonia but a decrease at the northern and southeastern coasts. The spatially contrasting results for differently exposed coasts reflect the corresponding variations in local wind, which are probably caused by changes in large-scale atmospheric pressure patterns above Northern Europe and a poleward shift of cyclones’ trajectories. Although featuring outstanding calibration results, the long-term wave hindcast may be impacted by possible inhomogeneities in the older wind data.http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2013/issue_1/earth-2013-1-42-56.pdfwave modellingwave measurementsfetchwind climateclimate changeBaltic Sea.
spellingShingle Ülo Suursaar
Locally calibrated wave hindcasts in the Estonian coastal sea in 1966–2011
Estonian Journal of Earth Sciences
wave modelling
wave measurements
fetch
wind climate
climate change
Baltic Sea.
title Locally calibrated wave hindcasts in the Estonian coastal sea in 1966–2011
title_full Locally calibrated wave hindcasts in the Estonian coastal sea in 1966–2011
title_fullStr Locally calibrated wave hindcasts in the Estonian coastal sea in 1966–2011
title_full_unstemmed Locally calibrated wave hindcasts in the Estonian coastal sea in 1966–2011
title_short Locally calibrated wave hindcasts in the Estonian coastal sea in 1966–2011
title_sort locally calibrated wave hindcasts in the estonian coastal sea in 1966 2011
topic wave modelling
wave measurements
fetch
wind climate
climate change
Baltic Sea.
url http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2013/issue_1/earth-2013-1-42-56.pdf
work_keys_str_mv AT ulosuursaar locallycalibratedwavehindcastsintheestoniancoastalseain19662011