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An Eddy Resolving Tidal-driven Model of the South China Sea Assimilating Along-track Sla Data Using the Enoi : Volume 7, Issue 5 (06/10/2011)

By Xie, J.

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Book Id: WPLBN0004020532
Format Type: PDF Article :
File Size: Pages 19
Reproduction Date: 2015

Title: An Eddy Resolving Tidal-driven Model of the South China Sea Assimilating Along-track Sla Data Using the Enoi : Volume 7, Issue 5 (06/10/2011)  
Author: Xie, J.
Volume: Vol. 7, Issue 5
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

Citation

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Bertino, L., Zhu, J., Counillon, F., & Xie, J. (2011). An Eddy Resolving Tidal-driven Model of the South China Sea Assimilating Along-track Sla Data Using the Enoi : Volume 7, Issue 5 (06/10/2011). Retrieved from http://worldlibrary.net/


Description
Description: ICCES, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China. The upper ocean circulation in the South China Sea (SCS) is driven by the Asian monsoon, the Kuroshio intrusion through the Luzon Strait, strong tidal currents, and a complex topography. Here, we demonstrate the benefit of assimilating along-track altimeter data into a nested configuration of the HYbrid Coordinate Ocean Model that includes tides. Including tides in models is important because they interact with the main circulation. However, assimilation of altimetry data into a model including tides is challenging because tides and mesoscale features contribute to the elevation of ocean surface at different time scales and require different corrections. To address this issue, tides are filtered out of the model output and only the mesoscale variability is corrected with a computationally cheap data assimilation method: the Ensemble Optimal Interpolation (EnOI). This method uses a running selection of members to handle the seasonal variability and assimilates the track data asynchronously. The data assimilative system is tested for the period 1994–1995, during which time a large number of validation data are available. Data assimilation reduces the Root Mean Square Error of Sea Level Anomalies from 9.3 to 6.9 cm and improves the representation of the mesoscale features. With respect to the vertical temperature profiles, the data assimilation scheme reduces the errors quantitatively with an improvement at intermediate depth and deterioration at deeper depth. The comparison to surface drifters shows an improvement of surface current by approximately −9% in the Northern SCS and east of Vietnam. Results are improved compared to an assimilative system that does not include tides and a system that does not consider asynchronous assimilation.

Summary
An eddy resolving tidal-driven model of the South China Sea assimilating along-track SLA data using the EnOI

Excerpt
Counillon, F. and Bertino, L.: Ensemble optimal interpolation: multivariate properties in the Gulf of Mexico, Tellus, 61A, 296–308, 2009a.; Antonov, J. I., Locarnini, R. A. Boyer, T. P., Mishonov, A. V., and Garcia, H. E.: World Ocean Atlas 2005, vol. 2: Salinity, edited by: Levitus, S., NOAA Atlas NESDIS 61, U.S. Gov. Print. Off., Washington, D.C., 182 pp., 2006.; Arbic, B. K., Wallcraft, A., and Metzger, E. J.: Concurrent simulation of the eddying general circulation and tides in a global ocean model, Ocean Model., 32, 175–187, 2011.; Austin, J. A. and Lentz, S. J.: The inner shelf response to wind-driven upwelling and downwelling, J. Phys. Oceanogr., 32, 2171–2193, 2002.; 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.; Bleck, R.: An oceanic general circulation model framed in hybrid isopycnic-cartesian coordinates, Ocean Model., 4, 55–88, 2002.; Bentsen, M., Evensen, G., Drange, H., and Jenkins, A. D.: Coordinate transform on a sphere using conformal mapping, Mon. Weather Rev., 127, 2733–2740, 1999.; Browning, G. L. and Kreiss, H.-Q.: Initialization of the shallow water equations with open boundaries by the bounded derivative method, Tellus, 34, 334–351, 1982.; Cai, S., Su, J., Gan, Z., and Liu, Q.: The numerical study of the South China Sea upper circulation characteristics and its dynamic mechanism, in winter, Cont. Shelf. Res., 15, 2247–2264, 2002.; Cai, S., Long, X., Wu, R., and Wang, S.: Geographical and monthly variability of the first baroclinic Rossby radius of deformation in the South China Sea, J. Marine Syst., 74, 711–720, 2008.; Chassignet, E. P., Smith, L. T., Halliwell, G. R., and Bleck, R.: North Atlantic simulations with the Hybrid Coordinate Ocean Model (HYCOM): Impact of the vertical coordinate choice, reference pressure, and thermobaricity, J. Phys. Oceanogr., 33, 2504–2526, 2003.; Chassignet, E. P., Hurlburt, H. E., Smedstad, O. M., Halliwell, G. R., Hogan, P. J., Wallcraft, A. J., Baraille, R., and Bleck, R.: The HYCOM(Hybrid Coordinate Ocean Model) data assimilative system, J. Marine. Syst., 65, 60–83, 2007.; Chu, P. C., Fan, C., Lozano, C. J., and Kerling, J. L.: An airborne expendable bathythermograph survey of the South China Sea, May 1995, J. Geophys. Res., 103, 21637–21652, 1998.; Cooper, M. and Haines, K.: Altimetric assimilation with water property conservation, J. Geophys. Res., 101, 1059–1077, 1996.; Counillon, F. and Bertino, L.: High-resolution ensemble forecasting for the Gulf of Mexico eddies and fronts, Ocean Dynam., 59, 83–95, 2009b.; Cummings, J., Bertino, L., Brasseur, P., Fukumori, I., Kamachi, M., Martin, M. J., Mogensen, K., Oke, P., Testut, C. E., Verron, J., and Weaver, A.: Ocean data assimilation systems for GODAE, GODAE special issue feature, 22, 96–109, 2009.; Davies, A. M. and Lawrence, J.: Modeling the effect of wave-current interaction on the three dimensional wind-driven circulation of the eastern Irish Sea, J. Phys. Oceanogr., 25, 29–45, 1995.; Demerliac, M. A.: Calcul du niveau moyen journalier. Annales Hydrographiques du SHOM, 5$^{ {éme}}$ série, 2, 49–57, 1974.; Dorandeu, J. and Le Traon, P.-Y.: Effects of global mean atmospheric pressure variations on mean sea level changes from Topex/Poseidon, J. Atmos. Ocean. Tech., 16, 1279–1283, 1999.; Du, T., Tseng, Y.-H., and Yan, X.-H.: Impacts of tidal currents and Kuroshio intrusion on the generation of nonlinear internal waves in Luzon Strait, J. Geophys. Res., 113, C08015, doi:10.1029/2007JC004294, 2008.; Evensen, G.: The ensemble Kalman fiter: theoretical formulation and practical implementation, Ocean Dynam., 53, 3

 

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