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Impact of Model Resolution on Sea-level Variability Characteristics at Various Space and Time Scales: Insights from Four Drakkar Global Simulations and the Aviso Altimeter Data : Volume 6, Issue 2 (08/07/2009)

By Penduff, T.

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Book Id: WPLBN0004021053
Format Type: PDF Article :
File Size: Pages 33
Reproduction Date: 2015

Title: Impact of Model Resolution on Sea-level Variability Characteristics at Various Space and Time Scales: Insights from Four Drakkar Global Simulations and the Aviso Altimeter Data : Volume 6, Issue 2 (08/07/2009)  
Author: Penduff, T.
Volume: Vol. 6, Issue 2
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Brodeau, L., Smith, G. C., Penduff, T., Barnier, B., Juza, M., Molines, J., & Treguier, A. (2009). Impact of Model Resolution on Sea-level Variability Characteristics at Various Space and Time Scales: Insights from Four Drakkar Global Simulations and the Aviso Altimeter Data : Volume 6, Issue 2 (08/07/2009). Retrieved from http://worldlibrary.net/


Description
Description: Laboratoire des Ecoulements Géophysiques et Industriels, Grenoble, France. Four global ocean/sea-ice simulations driven by the same realistic 46-year daily atmospheric forcing were performed within the DRAKKAR project at 2°, 1°, ½° and ¼° resolutions. Model sea-level anomalies are collocated over the period 1993–2004 onto the AVISO SLA dataset. These five collocated SLA datasets are then filtered and quantitatively compared over various time and space scales regarding three characteristics: SLA standard deviations, spatial correlations between SLA variability maps, and temporal correlations between observed and simulated band-passed filtered local SLA timeseries. Beyond the 2°–1° transition whose benefits are quite moderate, further increases in resolution and associated changes in subgrid scale parameterizations simultaneously induce (i) strong increases in SLA standard deviations, (ii) strong improvements in the spatial distribution of SLA variability, and (iii) slight decreases in temporal correlations between observed and simulation SLA timeseries. These 3 effects are not only clear on mesoscale (14–180 days) and quasi-annual (5–18 months) fluctuations, but also on the slower (interannual), large-scale variability ultimately involved in ocean-atmosphere coupled processes. Most SLA characteristics are monotonically affected by successive resolution increases, but irregularly and with a strong dependance on frequency and latitude. Benefits of enhanced resolution are maximum in the ½°–¼° transition, in the 14–180 day range, and within eddy-active mid- and high-latitude regions. They are particularly clear in the Southern Ocean where mesoscale eddies probably sustain a substantial intrinsic interannual variability.

Summary
Impact of model resolution on sea-level variability characteristics at various space and time scales: insights from four DRAKKAR global simulations and the AVISO altimeter data

Excerpt
Arakawa, A. and Lamb, V.: A potential enstrophy and energy conserving scheme for the shallow water equations, Mon. Weather Rev., 109, 18–36, 1981.; Barnier, B., Madec, G., Penduff, T., Molines, J.-M., Treguier, A.-M., le Sommer, J., Beckmann, A., Biastoch, A., B{ö}ning, C., Dengg, J., Derval, C., Durand, E., Gulev, S., Remy, E., Talandier, C., Theetten, S., Maltrud, M., McClean, J., and de Cuevas, B.: Impact of partial steps and momentum advection schemes in a global circulation model at eddy permitting resolution, Ocean Dynam., 59, 537, doi:10.1007/s10236-009-0180-y, 2009.; Berloff, P. S. and McWilliams, J. C.: Large-Scale, Low-Frequency Variability in Wind-Driven Ocean Gyres, J. Phys. Oceanogr., 29, 1925–1949, 1999.; Beckmann, A., B{ö}ning, C., K{ö}berle, C., and Willebrand, J.: Effects of increased horizontal resolution in a simulation of the North Atlantic Ocean, J. Phys. Oceanogr., 24, 326–344, 1994.; B{ö}ning, C. and Bryan, F. O.: The Warmwatersphere of the North Atlantic Ocean, chap. Large-scale transport processes in high-resolution circulation models, 91–128, Gebr{ü}der Borntraeger, 1996.; B{ö}ning, C. and Budich, R. G.: Eddy Dynamics in a Primitive Equation Model: Sensitivity to Horizontal Resolution and Friction, J. Phys. Oceanogr., 22, 361–381, 1992.; Brodeau, L., Barnier, B., Treguier, A.-M., and Penduff, T.: Comparing sea surface atmospheric variables from ERA40 and CORE with a focus on global net heat flux, 2006.; Brodeau, L., Barnier, B., Treguier, A.-M., Penduff, T., and Gulev, S.: An ERA40-based atmospheric forcing for global ocean circulation models, Ocean Model., in revision, 2009.; Capet, X., Marchesiello, P., and McWilliams, J.: Upwelling response to coastal wind profiles, Geophys. Res. Lett., 31, L13311, doi:10.1029/2004GL020123, 2004.; Chanut, J., Barnier, B., Large, W. G., Debreu, L., Penduff, T., Molines, J.-M., and Mathiot, P.: Mesoscale Eddies in the Labrador Sea and their Contribution to Convection and Restratification, J. Phys. Oceanogr., 38, 1617–1643, doi: 10.1175/2008JPO3485.1, 2008.; Chelton, D. B., de Szoeke, R. A., Schlax, M. G., Naggar, K. E., and Siwertz, N.: Geographical variability of the first-baroclinic Rossby radius of deformation, J. Phys. Oceanogr., 28, 433–460, 1998.; Cravatte, S., Madec, G., Izumo, T., Menkes, C., and Bozec, A.: Progress in the 3-D circulation of the eastern equatorial Pacific in a climate ocean model, Ocean Model., 17, 28–48, 2007.; Dengg, J., Beckmann, A., and Gerdes, R.: The Gulf Stream separation problem, in: The Warmwatersphere of the North Atlantic Ocean, edited by: Krauss, W., 253–290, Gebr{ü}der Borntraeger, Berlin, 1996.; Drillet, Y., Bourdallé-Badie, R., Siefridt, L., and Le Provost, C.: Meddies in the Mercator North Atlantic and Mediterranean Sea eddy-resolving model, J. Geophys. Res., 110, C03016, doi: 10.1029/2003JC002170, 2005.; Duchon, C.: Lanczos Filtering in One and Two Dimensions, J. Appl. Meteorol., 18, 1016–1022, 1979.; DYNAMO Group: DYNAMO: Dynamics of North Atlantic Models. Simulation and assimilation with high resolution models, Tech. rep., Ber. Inst. f. Meeresk. Kiel, 294, 1997.; Fanning, A. and Weaver, A.: A horizontal resolution and parameter sensitivity study of heat transport in an idealized coupled climate model, J. Climate, 10, 2469–2478, 1997.; Gent, P. R. and McWilliams, J. C.: Isopycnal Mixing in Ocean Circulation Models, J. Phys. Oceanogr., 20, 150–155, 1990.; Griffies, S. M., Biastoch, A., B{ö}ning, C., Bryan, F. O., Danabasoglu, G., Chassignet, E. P., England, M. H., Gerdes, R., Haak, H., Hallberg, R., Hazeleger, W., Jungclaus, J., Large, W. G., Madec, G., Pirani, A., Samuels, B., Scheinert, M., Gupta, A. S., Severijns, C., Simmons, H. L., Treguier, A.-M., Winton, M., Yeager, S., and Yin, J.: Coordinated ocean-ice reference experimen

 

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