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Impact of the Sea Surface Temperature Forcing on Hindcasts of Madd...

By: M. A. Balmaseda; K. Mogensen; F. Vitart; E. De Boisséson

Description: CNRM/GAME, URA 1357, 42 avenue Gaspard Coriolis, 31057, Toulouse, France. This paper explores the sensitivity of the prediction of Madden Julian Oscillation (MJO) events to different aspects of the sea surface temperature (SST) in the European Centre for Medium-range Weather Forecasts (ECMWF) model. The impact of temporal resolution of SST on the MJO is first evaluated via a set of monthly hindcast experiments. The experiments are conducted with an...

Cassou, C.: Intraseasonal interaction between the Madden-Julian Oscillation and the North Atlantic Oscillation, Nature, 455, 523–527, 2008.; Dee D. P., Uppala, S. M., Simmons, A. J., Berrisford, P., Poli, P., Kobayashi, S., Andrae, U., Balmaseda, M. A., Balsamo, G., Bauer, P., Bechtold, P., Beljaars, A. C. M., van de Berg, L., Bidlot, J., Bormann, N., Delsol, C., Dragani, R., Fuentes, M., Geer, A. J., Haimberger, L., Healy, S. B., Hersbach, H., Holm, E. V., Isaksen, L., ...

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Comparison Between Three Implementations of Automatic Identificati...

By: P. Y. Le Traon; C. De Boyer Montégut; J. M. A. C. Souza

Description: Institut Français de Recherche pour l'Exploitation de la Mer, Brest, France. Three methods for automatic detection of mesoscale coherent structures are applied to Sea Level Anomaly (SLA) fields in the South Atlantic. The first method is based on the wavelet packet decomposition of the SLA data, the second on the estimation of the Okubo-Weiss parameter and the third on a geometric criterion using the winding-angle approach. The results provide a comprehe...

Beismann, J. O., Kase, R. H., and Lutjeharms, J. R. E.: On the influence of submarine ridges on propagation and stability of Agulhas rings, J. Geophys. Res., 104, 7897–7906, 1999.; Boebel, O., Lutjeharms, J., Schmid, C., Zenk, W., Rossby, T., and barron, C.: The Cape Cauldron: A regime of turbulent inter-ocean exchange, Deep-Sea Res. II, 50, 57–86, 2003.; Byrne, D. A., Gordon, A. L., and Haxby, W. F.: Agulhas eddies: A synoptic view using Geosat ERM data, J. Phys. Oceano...

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Chaotic Variability of the Meridional Overturning Circulation on S...

By: B. Sinha; A. T. Blaker; A. Coward; J. J.-m. Hirschi; B. De Cuevas; G. Madec; S. Alderson

Description: National Oceanography Centre, Southampton, Southampton, SO14 3ZH, UK. Observations and numerical simulations have shown that the meridional overturning circulation (MOC) exhibits substantial variability on sub- to interannual timescales. This variability is not fully understood. In particular it is not known what fraction of the MOC variability is caused by processes such as mesoscale ocean eddies and internal waves which are ubiquitous in the ocean. H...

Antonov, J., Levitus, S., Boyer, T. P., Conkright, M., O'Brien, T., and Stephens, C.: Temperature of the Atlantic/Pacific/Indian Ocean, Vols 1-3, World Ocean Atlas 1998, Technical report, NOAA Atlas NESDIS 27, 166 pp., 1998.; Biastoch, A., Böning, C. W., and Lutjeharms, J. R. E.: Agulhas leakage dynamics affects decadal variability in Atlantic overturning circulation, Nature, 456, 489–492, 2008.; Bingham, R. J., Hughes, C. W., Roussenov, V., and Williams, R. G.: Meridion...

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Sea Level Budget Over 2005–2013: Missing Contributions and Data Er...

By: K. Von Schuckmann; M. Ablain; H. B. Dieng; B. Meyssignac; A. Cazenave

Description: Laboratoire d'Etudes en Géophysique et Océanographie Spatiales – Centre National d'Etudes Spatiales (LEGOS – CNES), Toulouse, France. Based on the sea level budget closure approach, this study investigates the residuals between observed global mean sea level (GMSL) and the sum of components (steric sea level and ocean mass) for the period January 2005 to December 2013. The objective is to identify the impact of errors in one or several components of the ...

Balmaseda, M. A., Trenberth, K., and Kallen, E.: Distinctive climate signals in reanalysis of global ocean heat content, Geophys. Res. Lett., 40, 1–6, doi:10.1002/grl.50382, 2013a.; Balmaseda, M. A., Mogensen, K., and Weaver, A. T.: Evaluation of the ECMWF ocean reanalysis system ORAS4, Q. J. R. Meteorol. Soc., 139, 1132–1161, doi:10.1002/qj.2063, 2013b.; Ablain, M., Cazenave, A...

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A New Method for Continuous Measurements of Oceanic and Atmospheri...

By: D. L. Arévalo-martínez; A. Kock; A. Körtzinger; I. Piller; H. W. Bange; T. Steinhoff; M. Beyer; M. Krumbholz

Description: Helmholtz Centre for Ocean Research Kiel (GEOMAR), Düsternbrooker Weg 20 24105 Kiel, Germany. A new system for continuous, highly resolved oceanic and atmospheric measurements of N2O, CO and CO2 is described. The system is based upon off-axis integrated cavity output spectroscopy (OA-ICOS) and a non-dispersive infrared analyzer (NDIR), both coupled to a Weiss-type equilibrator. Performance of the combined setup was evaluated by test...

Allan, D. W.: Statistics of atomic frequency standards, Proc. IEEE, 54, 221–230, 1966.; Andrié, C., Oudot, C., Genthon, C, and Merlivat, L.: CO2 fluxes in the tropical Atlantic during FOCAL cruises, J. Geophys. Res., 21, 11741–11755, 1986.; Baer, D. S., Paul, J. B., Gupta, M., and O'keefe, A.: Sensitive absorption measurements in the near-infrared region using off-axis integrated-cavity output spectroscopy, Appl. Phys. B., 75, 261–265, 2002.; Bakker, D. C. E.,...

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