Coastal observing and forecasting system for the German Bight – estimates of hydrophysical states

A coastal observing system for Northern and Arctic Seas (COSYNA) aims at construction of a long-term observatory for the German part of the North Sea, elements of which will be deployed as prototype modules in Arctic coastal waters. At present a coastal prediction system deployed in the area of the...

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Published in:Ocean Science
Main Authors: W. Petersen, J. Seemann, S. Grayek, J. Staneva, J. Schulz-Stellenfleth, E. V. Stanev
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2011
Subjects:
G
Online Access:https://doi.org/10.5194/os-7-569-2011
https://doaj.org/article/38b61c7d506a4414a7c63224c60dc999
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spelling ftdoajarticles:oai:doaj.org/article:38b61c7d506a4414a7c63224c60dc999 2023-05-15T15:02:16+02:00 Coastal observing and forecasting system for the German Bight – estimates of hydrophysical states W. Petersen J. Seemann S. Grayek J. Staneva J. Schulz-Stellenfleth E. V. Stanev 2011-09-01T00:00:00Z https://doi.org/10.5194/os-7-569-2011 https://doaj.org/article/38b61c7d506a4414a7c63224c60dc999 EN eng Copernicus Publications http://www.ocean-sci.net/7/569/2011/os-7-569-2011.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 doi:10.5194/os-7-569-2011 1812-0784 1812-0792 https://doaj.org/article/38b61c7d506a4414a7c63224c60dc999 Ocean Science, Vol 7, Iss 5, Pp 569-583 (2011) Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2011 ftdoajarticles https://doi.org/10.5194/os-7-569-2011 2022-12-31T13:27:29Z A coastal observing system for Northern and Arctic Seas (COSYNA) aims at construction of a long-term observatory for the German part of the North Sea, elements of which will be deployed as prototype modules in Arctic coastal waters. At present a coastal prediction system deployed in the area of the German Bight integrates near real-time measurements with numerical models in a pre-operational way and provides continuously state estimates and forecasts of coastal ocean state. The measurement suite contributing to the pre-operational set up includes in situ time series from stationary stations, a High-Frequency (HF) radar system measuring surface currents, a FerryBox system and remote sensing data from satellites. The forecasting suite includes nested 3-D hydrodynamic models running in a data-assimilation mode, which are forced with up-to-date meteorological forecast data. This paper reviews the present status of the system and its recent upgrades focusing on developments in the field of coastal data assimilation. Model supported data analysis and state estimates are illustrated using HF radar and FerryBox observations as examples. A new method combining radial surface current measurements from a single HF radar with a priori information from a hydrodynamic model is presented, which optimally relates tidal ellipses parameters of the 2-D current field and the M2 phase and magnitude of the radials. The method presents a robust and helpful first step towards the implementation of a more sophisticated assimilation system and demonstrates that even using only radials from one station can substantially benefit state estimates for surface currents. Assimilation of FerryBox data based on an optimal interpolation approach using a Kalman filter with a stationary background covariance matrix derived from a preliminary model run which was validated against remote sensing and in situ data demonstrated the capabilities of the pre-operational system. Data assimilation significantly improved the performance of the model with ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Ocean Science 7 5 569 583
institution Open Polar
collection Directory of Open Access Journals: DOAJ Articles
op_collection_id ftdoajarticles
language English
topic Geography. Anthropology. Recreation
G
Environmental sciences
GE1-350
spellingShingle Geography. Anthropology. Recreation
G
Environmental sciences
GE1-350
W. Petersen
J. Seemann
S. Grayek
J. Staneva
J. Schulz-Stellenfleth
E. V. Stanev
Coastal observing and forecasting system for the German Bight – estimates of hydrophysical states
topic_facet Geography. Anthropology. Recreation
G
Environmental sciences
GE1-350
description A coastal observing system for Northern and Arctic Seas (COSYNA) aims at construction of a long-term observatory for the German part of the North Sea, elements of which will be deployed as prototype modules in Arctic coastal waters. At present a coastal prediction system deployed in the area of the German Bight integrates near real-time measurements with numerical models in a pre-operational way and provides continuously state estimates and forecasts of coastal ocean state. The measurement suite contributing to the pre-operational set up includes in situ time series from stationary stations, a High-Frequency (HF) radar system measuring surface currents, a FerryBox system and remote sensing data from satellites. The forecasting suite includes nested 3-D hydrodynamic models running in a data-assimilation mode, which are forced with up-to-date meteorological forecast data. This paper reviews the present status of the system and its recent upgrades focusing on developments in the field of coastal data assimilation. Model supported data analysis and state estimates are illustrated using HF radar and FerryBox observations as examples. A new method combining radial surface current measurements from a single HF radar with a priori information from a hydrodynamic model is presented, which optimally relates tidal ellipses parameters of the 2-D current field and the M2 phase and magnitude of the radials. The method presents a robust and helpful first step towards the implementation of a more sophisticated assimilation system and demonstrates that even using only radials from one station can substantially benefit state estimates for surface currents. Assimilation of FerryBox data based on an optimal interpolation approach using a Kalman filter with a stationary background covariance matrix derived from a preliminary model run which was validated against remote sensing and in situ data demonstrated the capabilities of the pre-operational system. Data assimilation significantly improved the performance of the model with ...
format Article in Journal/Newspaper
author W. Petersen
J. Seemann
S. Grayek
J. Staneva
J. Schulz-Stellenfleth
E. V. Stanev
author_facet W. Petersen
J. Seemann
S. Grayek
J. Staneva
J. Schulz-Stellenfleth
E. V. Stanev
author_sort W. Petersen
title Coastal observing and forecasting system for the German Bight – estimates of hydrophysical states
title_short Coastal observing and forecasting system for the German Bight – estimates of hydrophysical states
title_full Coastal observing and forecasting system for the German Bight – estimates of hydrophysical states
title_fullStr Coastal observing and forecasting system for the German Bight – estimates of hydrophysical states
title_full_unstemmed Coastal observing and forecasting system for the German Bight – estimates of hydrophysical states
title_sort coastal observing and forecasting system for the german bight – estimates of hydrophysical states
publisher Copernicus Publications
publishDate 2011
url https://doi.org/10.5194/os-7-569-2011
https://doaj.org/article/38b61c7d506a4414a7c63224c60dc999
geographic Arctic
geographic_facet Arctic
genre Arctic
genre_facet Arctic
op_source Ocean Science, Vol 7, Iss 5, Pp 569-583 (2011)
op_relation http://www.ocean-sci.net/7/569/2011/os-7-569-2011.pdf
https://doaj.org/toc/1812-0784
https://doaj.org/toc/1812-0792
doi:10.5194/os-7-569-2011
1812-0784
1812-0792
https://doaj.org/article/38b61c7d506a4414a7c63224c60dc999
op_doi https://doi.org/10.5194/os-7-569-2011
container_title Ocean Science
container_volume 7
container_issue 5
container_start_page 569
op_container_end_page 583
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