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: Stanev, E. V., Schulz-Stellenfleth, J., Staneva, J., Grayek, S., Seemann, J., Petersen, W.
Format: Article in Journal/Newspaper
Language:English
Published: EGU - Copernicus Publication 2011
Subjects:
Online Access:https://publications.hereon.de/id/39693
https://publications.hzg.de/id/39693
https://doi.org/10.5194/os-7-569-2011
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spelling fthzgzmk:oai:publications.hereon.de:39693 2023-06-11T04:09:23+02:00 Coastal observing and forecasting system for the German Bight – estimates of hydrophysical states Stanev, E. V. Schulz-Stellenfleth, J. Staneva, J. Grayek, S. Seemann, J. Petersen, W. 2011 https://publications.hereon.de/id/39693 https://publications.hzg.de/id/39693 https://doi.org/10.5194/os-7-569-2011 en eng EGU - Copernicus Publication https://dx.doi.org/10.5194/os-7-569-2011 urn:issn:1812-0784 https://publications.hereon.de/id/39693 https://publications.hzg.de/id/39693 info:eu-repo/semantics/openAccess open_access oa_gold issn:1812-0784 Stanev, E. V.; Schulz-Stellenfleth, J.; Staneva, J.; Grayek, S.; Seemann, J.; Petersen, W.: Coastal observing and forecasting system for the German Bight – estimates of hydrophysical states. In: Ocean Science. Vol. 7 (2011) 5, 569 - 583. (DOI: /10.5194/os-7-569-2011) info:eu-repo/semantics/article Zeitschrift Artikel 2011 fthzgzmk https://doi.org/10.5194/os-7-569-2011 2023-05-28T23:25:12Z 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 Hereon Publications (Helmholtz-Zentrum) Arctic Ocean Science 7 5 569 583
institution Open Polar
collection Hereon Publications (Helmholtz-Zentrum)
op_collection_id fthzgzmk
language English
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 Stanev, E. V.
Schulz-Stellenfleth, J.
Staneva, J.
Grayek, S.
Seemann, J.
Petersen, W.
spellingShingle Stanev, E. V.
Schulz-Stellenfleth, J.
Staneva, J.
Grayek, S.
Seemann, J.
Petersen, W.
Coastal observing and forecasting system for the German Bight – estimates of hydrophysical states
author_facet Stanev, E. V.
Schulz-Stellenfleth, J.
Staneva, J.
Grayek, S.
Seemann, J.
Petersen, W.
author_sort Stanev, E. V.
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 EGU - Copernicus Publication
publishDate 2011
url https://publications.hereon.de/id/39693
https://publications.hzg.de/id/39693
https://doi.org/10.5194/os-7-569-2011
geographic Arctic
geographic_facet Arctic
genre Arctic
genre_facet Arctic
op_source issn:1812-0784
Stanev, E. V.; Schulz-Stellenfleth, J.; Staneva, J.; Grayek, S.; Seemann, J.; Petersen, W.: Coastal observing and forecasting system for the German Bight – estimates of hydrophysical states. In: Ocean Science. Vol. 7 (2011) 5, 569 - 583. (DOI: /10.5194/os-7-569-2011)
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container_title Ocean Science
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