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Coastal Observing and Forecasting System for the German Bight – Estimates of Hydrophysical States : Volume 8, Issue 2 (20/04/2011)

By Stanev, E. V.

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Book Id: WPLBN0003975392
Format Type: PDF Article :
File Size: Pages 44
Reproduction Date: 2015

Title: Coastal Observing and Forecasting System for the German Bight – Estimates of Hydrophysical States : Volume 8, Issue 2 (20/04/2011)  
Author: Stanev, E. V.
Volume: Vol. 8, Issue 2
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Staneva, J., Grayek, S., Schulz-Stellenfleth, J., Petersen, W., Stanev, E. V., & Seemann, J. (2011). Coastal Observing and Forecasting System for the German Bight – Estimates of Hydrophysical States : Volume 8, Issue 2 (20/04/2011). Retrieved from http://www.worldebookfair.org/


Description
Description: Institute of Coastal Research, Helmholtz-Zentrum Geesthacht (HZG), Max-Planck-Strasse 1, 21502 Geesthacht, Germany. 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 respect to both SST and SSS and demonstrated a good skill not only in the vicinity of the Ferry track, but also over larger model areas. The examples provided in this study are considered as initial steps in establishing new coastal ocean products enhanced by the integrated COSYNA-observations and numerical modelling.

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

Excerpt
Backhaus, J. O. and Maier-Reimer, E.: On seasonal circulation in the North Sea, in: North Sea Dynamics, edited by: Sündermann, J. and Lenz, W., Springer-Verlag, Berlin, Heidelberg, New York, 693 pp., 1983.; Barrick, D. E., Evans, M. W., and Weber, B. L.: Ocean surface currents mapped by radar, Science, 198(4313), 138–144, 1977.; Barth, A., Alvera-Azcárate, A., and Weisberg, R.: Assimilation of high-frequency radar currents in a nested model of the West Florida Shelf, J. Geophys. Res., 113, C08033, doi:10.1029/2007JC004585, 2008.; Barth, A., Alvera-Azcárate, A., Gurgel, K.-W., Staneva, J., Port, A., Beckers, J.-M., and Stanev, E. V.: Ensemble perturbation smoother for optimizing tidal boundary conditions by assimilation of High-Frequency radar surface currents – application to the German Bight, Ocean Sci., 6, 161–178, doi:10.5194/os-6-161-2010, 2010.; Barth, A., Alvera-Azcárate, A., Beckers, J. M., Staneva, J., Stanev, E. V., and Schulz-Stelleneth, J.: Correcting surface winds by assimilating high-frequency radar surface currents in the German Bight, Ocean Dynam., doi:10.1007/s10236-010-0369-0, in press, 2011.; Becker, G. A., Giese, H., Isert, K., König, P., Langenberg, H., Pohlmann, T., and Schrum, C.: Mesoscale variability in the German Bight, Deut. Hydrogr. Z., 51(2), 155–179, 1999.; Bell, M. J., Lefèbvre, M., Le Traon, P.-Y., Smith, N., and Wilmer-Becker, K.: GODAE: the global Ocean data assimilation experiment, Oceanography, 22(3), 14–21, 2009.; Bennett, A. F.: Inverse Methods in Physical Oceanography, Cambridge University Press, New York, 1992.; Breivik, O. and Saetra, O.: Real time assimilation of HF radar currents into a coastal ocean model, J. Marine Syst., 28, 161–182, 2001.; Burchard, H. and Bolding, K.: GETM – a general estuarine transport model, Tech. rep., European Comission, no EUR 20253 EN, printed in Italy, 2002.; Chapman, R., Shay, L. K., Graber, H., Edson, J. B., Karachintsev, A., Trump, C. L., and Ross, D. B.: On the accuracy of HF radar surface current measurements: intercomparison with ship-based sensors, J. Geophys. Res., 102, 18737–18748, 1997.; Crombie, D. D.: Doppler spectrum of sea echo at 13.56 Mc/s, Nature, 175, 681–682, 1955.; De Mey, P. and Proctor, R.: Assessing the value of GODAE products in coastal and shelf seas, Ocean Dynam., 59(1), 1–2, 2009.; Dick, S. and Kleine, E.: The BSH new operational circulation model using general vertical co-ordinates, Environ. Res. Eng. Manag., 3(41), 18–24, 2007.; Dick, S. K., Kleine, E., Müller-Navarra, K., Klein, S. H., and Komo, H.: The operational circulation model of BSH ({BSH}cmod) model description and validation, Report 29, Bundesamt für Seeschifffahrt und Hydrographie ({BSH}), Hamburg, 2001.; Donlon, C. J., Casey, K. S., Robinson, I. S., Gentemann, C. L., Reynolds, R. W., Barton, I., Arino, O., Stark, J., Rayner, N., Le Borgne, P., Poulter, D., Vazquez-Cuervo,&a

 

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