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OSEval-TT related publications

The list below shows publications relevant to observing system design and evaluation

[2018, 2017, 2016, 2015, 2014, before 2014]

 

 

2018

Ardhuin, F., Aksenov, Y., Benetazzo, A., Bertino, L., Brandt, P., Caubet, E., Chapron, B., Collard, F., Cravatte, S., Delouis, J.-M., Dias, F., Dibarboure, G., Gaultier, L., Johannessen, J., Korosov, A., Manucharyan, G., Menemenlis, D., Menendez, M., Monnier, G., Mouche, A., Nouguier, F., Nurser, G., Rampal, P., Reniers, A., Rodriguez, E., Stopa, J., Tison, C., Ubelmann, C., van Sebille, E., and Xie, J., 2018: Measuring currents, ice drift, and waves from space: the Sea surface KInematics Multiscale monitoring (SKIM) concept, Ocean Sci., 14, 337-354, https://doi.org/10.5194/os-14-337-2018.

Bonaduce, A., Benkiran, M., Remy, E., Le Traon, P. Y., and Garric, G.: Contribution of future wide swath altimetry missions to ocean analysis and forecasting, Ocean Sci. Discuss., https://doi.org/10.5194/os-2018-58 , in review, 2018.

Xie J., L. Bertino, E. Cardellach, M. Semmling, J. Wickert, 2018: An OSSE evaluation of the GNSS-R altimetry data for the GEROS-ISS mission as a complement to the existing observational networks, Remote Sensing of Environment, 209, pp. 152-165, https://doi.org/10.1016/j.rse.2018.02.053 .

2017

Ando, K., Y. Kuroda, Y. Fujii, T. Fukuda, T. Hasegawa, T. Horii, Y. Ishihara, Y. Kashino, Y. Masumoto, K. Mizuno, M. Nagura, and I. Ueki, 2017: Fifteen years progress of the TRITON array in the Western Pacific and Eastern Indian Oceans. J. oceanogr., 73, 403-426, doi:10.1007/s10872-017-0414-4.

Chen, S., J. A. Cummings, J. M. Schmidt, E. R. Sanabia, and S. R. Jayne, 2017: Targeted ocean sampling guidance for tropical cyclones, J. Geophys. Res. Oceans, 122, 3505–3518, doi:10.1002/2017JC012727.

Dong, J., R. Domingues, Goni, G., Halliwell, G., H-S Kim, S-K Lee, M. Mehari, F. Bringas, J. Morell, and L. Pomales, 2017: Impact of assimilating underwater glider data on Hurricane Gonzalo (2014) forecast. Wea. and Forecasting, 32(3), 1143-1159.

Halliwell, Jr., G. R., M. Mehari, M. Le Henaff, V. H. Kourafalou, Y. S. Androulidakis, H-S Kang, and R. Atlas, 2017: North Atlantic Ocean OSSE System: Evaluation of Operational Ocean Observing System Components and Supplemental Seasonal Observations for Improving Coupled Tropical Cyclone Prediction. J. Oper. Oceanogr., 10(2), 154-175.

Halliwell, G. R., M. Mehari, L. K. Shay, V. H. Kourafalou, H. Kang, H.-S. Kim, J. Dong, and R. Atlas, 2017: OSSE quantitative assessment of rapid-response prestorm ocean surveys to improve coupled tropical cyclone prediction, J. Geophys. Res. Oceans, 122, doi: 10.1002/2017JC012760 .

Xue, Y., Wen, C., Yang, X., Behringer, D., Kumar, A., Vecchi, G., Rosati, A., and Gudgel, R., 2017: Evaluation of tropical Pacific observing system using NCEP and GFDL ocean data assimilation systems. Clim. Dyn. 49, 843-868. doi:10.1007/s00382-015-2743-6

Xue, Y., C. Wen, A. Kumar, M. Balmaseda, Y. Fujii, O. Alves, M. Martin, X. Yang, G. Vernieres, C. Desportes, T. Lee, L. Ascione, R. Gudgel, and I Ishikawa, 2017: A Real-time Ocean Reanalyses Intercomparison Project in the Context of Tropical Pacific Observing System and ENSO Monitoring. Climate Dynamics, 49, 3647-3672. doi:10.1007/s00382-017-3535-y

2016

Androulidakis, Y, V. Kourafalou, G. R. Halliwell, Jr, M. Le Hénaff, H. Kang, M. Mehari, and R. Atlas, 2016: Hurricane interaction with the upper ocean in the Amazon-Orinoco plume region. Ocean Dynamics, 66, 1559-1588.

Kourafalou V, Y. Androulikakis, G. R. Halliwell, Jr, H. Kang, M. Mehari, M. Le Hénaff, R. Atlas, and R. Lumpkin, 2016: North Atlantic ocean OSSE system development: Nature Run evaluation and application to hurricane interaction within the Gulf Stream. Prog. Oceanogr., 148, 1-25, doi:10.1016/j.pocean.2016.09.001.

Xie, J., Counillon, F., Bertino, L., Tian-Kunze, X., and Kaleschke, L., 2016: Benefits of assimilating thin sea ice thickness from SMOS into the TOPAZ system, The Cryosphere, 10, 2745-2761, https://doi.org/10.5194/tc-10-2745-2016

Xue, Y., C. Wen, A. Kumar, M. Balmaseda, Y. Fujii, G. Vecchi, G. Vernieres, O. Alves, M. Martin, F. Hernandez, T. Lee, D. Legler, and D. DeWitt, 2016: A Real-time Multiple Ocean Reanalyses Intercomparison Project for Quantifying the Impacts of Tropical Pacific Observing Systems on Constraining Ocean Reanalyses and Enhancing our Capability in Monitoring and Predicting ENSO. Science and Technology Infusion Climate Bullutin, 40th NOAA Climate Diagnstics and Prediction Workshop Special Issue, NOAA’s National Weather Service, 111-118, http://www.nws.noaa.gov/ost/climate/STIP/40CDPW/40cdpw-YXue.pdf.

2015

Fujii, Y., J. Cummings, Y. Xue, A. Schiller, T. Lee, M. A. Balmaseda, E. Rémy, S. Masuda, G. Brassington, O. Alves, B. Cornuelle, M. Martin, P. Oke, G. Smith, and X. Yang, 2015: Evaluation of the Tropical Pacific Observing System from the Ocean Data Assimilation Perspective. Q. J. R. Meteorol. Soc., 141, 2481-2496. doi:10.1002/qj.2579.

Fujii, Y., K. Ogawa, G. B. Brassington, K. Ando, T. Yasuda, and T. Kuragano, 2015: Evaluating the impacts of the tropical Pacific observing system on the ocean analysis fields in the global ocean data assimilation system for operational seasonal forecasts in JMA. J. Oper. Oceanogr., 8(1): 25-39. doi:10.1080/1755876X.2015.1014640.

Halliwell, Jr., G. R., V. Kourafalou, M. Le Henaff, R. Atlas, and L. K. Shay, 2015: OSSE impact analysis of airborne ocean surveys for improving upper-ocean dynamical and thermodynamical forecasts in the Gulf of Mexico. Prog. in Oceanogr., 130, 32-46, doi:10.1016/j.pocean.2014.09.004.

Kuragano T, Fujii Y, Kamachi M, 2015: Evaluation of the Argo network using statistical space-time scales derived from satellite altimetry data. J. Gephys. Res., Ocean, 120(6), 4534-4551. doi: 10.1002/2015JC010730.

Oke, P. R., Y. Fujii, and T. Rykova, 2015: Using models to design and evaluate ocean observing systems. CLIVAR EXCHANGE No. 67, Vol. 19, No. 2, 46-49.

Oke, P. R., G. Larnicol, Y. Fujii, G. C. Smith, D. J. Lea, S. Guinehut, E. Remy, M. A. Balmaseda, T. Rykova, D. Surcel-Colan, M. J. Martin, A. A. Sellar, S. Mulet, V. Turpin, 2015: Assessing the impact of observations on ocean forecasts and reanalyses: Part 1, Global studies. Journal of Operational Oceanography, 8(S1), s49-s62. doi:10.1080/1755876X.2015.1022067.

Oke, P. R., G. Larnicol, E. M. Jones, V. Kourafalou, A. K. Sperrevik, F. Carse, C. A. S. Tanajura, B. Mourre, M. Tonani, G. B. Brassington, M. Le Hénaff, G. R. Halliwell, Jr., R. Atlas, A. M. Moore, C. A. Edwards, M. J. Martin, A. A. Sellar, A. Alvarez, P. De Mey, and M. Iskandarani, 2015: Assessing the impact of observations on ocean forecasts and reanalyses: Part 2, regional applications. J. Operational Oceanogr., 8(S1), s63-s79. doi:10.1080/1755876X.2015.1022080.

Toyoda, T, Y. Fujii, T. Kuragano, J. P. Matthews, H. Abe, N. Ebuchi, N. Usui, K. Ogawa, and M. Kamachi, 2015: Improvements to a global ocean data assimilation system through the incorporation of Aquarius surface salinity data. Q. J. R. Meteorol. Soc. 141, 2750-2759. doi:10.1002/qj.2561.

2014

Balmaseda, M.A., Kumar, A., Andersson, E., Takaya, Y., Anderson, D., Janssen, P., Martin, M., and Fujii, Y. 2014: White Paper #4 – Operational forecasting systems. Report of the Tropical Pacific Observing System 2020 Workshop (TPOS2020). Volume II – White Papers. GCOS Rep. 184/ GOOS Rep. 206/ WCRP Rep. 6/2014. 64-101.

Cummings, J.A. and O.M. Smedstad, 2014: Ocean data impacts in global HYCOM. J. Atmos. Ocn. Tech., 31, 1771-1791, doi:0.1175/JTECH-D-14-00011.1.

Fujii, Y., Cummings, J., Xue, Y., Schiller, A., Lee, T., Balmaseda, M.A., Remy, E., Masuda, S., Alves, O., Brassington, G., Cornuelle, B., Martin, M., Oke, P., Smith, G., and Yang, X. 2014: White Paper #5 – Evaluation of the Tropical Pacific Observing System from the data assimilation perspective. Report of the Tropical Pacific Observing System 2020 Workshop (TPOS2020). Volume II -White Papers. GCOS Rep. 184/ GOOS Rep. 206/ WCRP Rep. 6/2014. 102-129.

Halliwell, Jr., G. R., A. Srinivasan, V. Kourafalou, H Yang, D. Willey, M. Le Henaff, and R. Atlas, 2014. Rigorous evaluation of a fraternal twin ocean OSSE system in the open Gulf of Mexico. J. Atmos. Ocean. Technol., 31, 105-130, doi:10.1175/JTECH-D-13-00011.1.

Before 2014

Atlas, R., R. N. Hoffman, S. M. Leidner, J. Sienkiewicz, T.-W. Yu, S. C. Bloom, E. Brin, J. Ardizzone, J. Terry, D. Bungato, J. C. Jusemm, 2001: The effects of marine winds from scatterometer data on weather analysis and forecasting. B. Am. Meterol. Soc., 82, 1965-1990.

Balmaseda, M.A., D. Anderson, and A. Vidard, 2007: Impact of Argo on analyses of the global ocean. Geophysical Research Letters 34(L16605): doi:10.1029/2007GL030452.

Balmaseda, M.A., and D. Anderson, 2009:. Impact of initialization strategies and observations on seasonal forecast skill. Geophysical Research Letters 36(L01701):doi:10.1029/ 2008GL035561.

Balmaseda, M. A, O. J. Alves, A. Arribas, T. Awaji, D. W. Behringer, N. Ferry, Y. Fujii, T. Lee, M. Rienecker, T. Rosati, and D. Stammer, 2009: Ocean initialization for seasonal forecasts. Oceanogr., 22(2), 154-159. doi:10.5670/oceanog.2009.73

Balmaseda, M., Y. Fujii, O. Alves, T. Awaji, D. Behringer, N. Ferry, T. Lee, M. Rienecker, T. Rosati, D. Stammer, D. Smith, and F. Molteni 2010: Initialization for seasonal and decadal forecasts. Proceedings of OceanObs'09: Sustained Ocean Observations and Information for Society (Vol. 2), Venice, Italy, 21-25 September 2009, Hall, J., Harrison D.E. & Stammer, D., Eds., ESA Publication WPP-306, 19-26, doi:10.5270/OceanObs09.cwp.02.

Balmaseda, M., Y. Fujii, O. Alves, T. Lee, M. Rienecker, T. Rosati, D. Stammer, Y. Xue, H. Freeland, M. J. McPhaden, L. Goddard, C. Coelho, 2010: "Role of the Ocean Observing System in an End-to-End Seasonal Forecasting System" in Proceedings of OceanObs’09: Sustained Ocean Observations and Information for Society (Vol. 1), Venice, Italy, 21-25 September 2009, Hall, J., Harrison, D.E. & Stammer, D., Eds., ESA Publication WPP-306, 299-315, doi:10.5270/OceanObs09.pp.03

Balmaseda, M., Y. Fujii, O. Alves, T. Awaji, D. Behringer, N. Ferry, T. Lee, M. Rienecker, T. Rosati, D. Stammer, D. Smith, and F. Molteni 2010: Initialization for seasonal and decadal forecasts. Proceedings of OceanObs'09: Sustained Ocean Observations and Information for Society (Vol. 2), Venice, Italy, 21-25 September 2009, Hall, J., Harrison D.E. & Stammer, D., Eds., ESA Publication WPP-306, 19-26, doi:10.5270/OceanObs09.cwp.02.

Ballabrera-Poy, J., E. Hackert, R. Murtugudde, and A.J. Busalacchi, 2007: An observing system simulation experiment for an optimal moored instrument array in the tropical Indian Ocean. Journal of Climate 20:3249-3268.

Barth, N. and C. Wunsch, 1990: Oceanographic experiment design by simulated annealing. J. Phys. Oceanogr., 20, 1249-1263.

Benkiran, M and E. Greiner, 2007: Data assimilation of drifter velocities in the Mercator Ocean system. Mercator Ocean quarterly newsletter 25, Available online at www.mercator-ocean.fr/documents/lettre/lettre_25_en.pdf.

Benkiran, M., E. Greiner, S. Giraud St Albin, E. Dombrowsky, D. Jourdan and M. Faillot, 2008: Impact study of the number Space Altimetry observing systems on the altimeter data assimilation in the Mercator-Ocean system. In preparation.

Berliner, L. M., Q. Lu, and C. Snyder, 1999: Statistical design for adaptive weather observations. J. Atmos. Sci., 56, 2536-2552.

Bishop, C. H., B. J. Etherton, S. J. Majumdar, 2001: Adaptive sampling with the ensemble transform Kalman filter. Part I: Theoretical aspects. Mon. Weath. Rev., 129, 420-436.

Bishop, C. H., C. A. Reynolds, M. K. Tippett, 2003: Optimization of the fixed global observing network in a simple model. J. Atmos. Sci, 60, 1471-1489.

Bishop, C. H., B. J. Etherton, S. J. Majumdar, 2006: Verification region selection and data assimilation for adaptive sampling. Q.J.R. Meteorol. Soc., 132, 915-933.

Brassington, G. B., and P. Divakaran, 2009: The theoretical impact of remotely sensed sea surface salinity observations in a multi-variate assimilation system. Ocean Modelling, 27, 70-81.

Cardinala, C., S. Pezzulli and E. Andersson, 2004: Influence-matrix diagnostic of a data assimilation system, Q.J.R. Meteorol. Soc. 130:2767-2786.

Desroziers, G., P. Brousseau, B. Chapnick, 2005: Use of randomization to diagnose the impact of observations on analyses and forecasts. Q. J. R. Meteorol. Soc., 131, 2821-2837.

Fiorelli et al., 2004: Multi-AUV Control and adaptive sampling in Monterey Bay, Proc. IEEE Autonomous Underwater vehicles.

Fujii, Y., M. Kamachi, S. Matsumoto, S. Ishizaki, 2012: Barrier layer and relevant variability of the salinity field in the equatorial Pacific estimated in an ocean reanalysis experiment. Pure Appl. Geophys. 169 (3), 579-594. doi:10.1007/s00024-011-0387-y.

2011

Fujii, Y., M. Kamachi, T. Nakaegawa, T. Yasuda, G. Yamanaka, T. Toyoda, K. Ando, and S. Matsumoto, 2011: Assimilating Ocean Observation data for ENSO monitoring and forecasting. Climate Variability - Some Aspects, Challenges and Prospects, Ed: A. Hannachi, ISBN:979-953-307-236-3, InTechOpen, Rijeka, Croatia,75-98. doi:10.5772/30330.

Fujii, Y., M. Kamachi, N. Usui, S. Matsumoto, T. Yasuda, S. Ishizaki 2010: Observing system evaluations using the ocean data assimilation and prediction system, MOVE/MRI.COM. Proceedings of the "OceanObs'09: Sustained Ocean Observations and Information for Society" Conference (Annex), Venice, Italy, 21-25 September 2009, Hall, J., Harrison D.E. and Stammer, D., Eds., ESA Publication WPP-306, doi:10.5270/OceanObs09.

Fujii, Y., M. Kamachi, N. Usui, H. Tsujino, and H. Nakano, 2009: Application of singular vector analysis to the Kuroshio large meander. 5th WMO Data Assimilation Symposium Extended Abstract, 262.1-8.

Fujii, Y., H. Tsujino, N. Usui, H. Nakano, and M. Kamachi, 2008a: Application of singular vector analysis to the Kuroshio large meander. Journal of Geophysical Research, 113(C07026):doi:10.1029/2007JC004476.

Fujii, Y., T. Yasuda, S. Matsumoto, M. Kamachi, and K. Ando, 2008b: Observing System Evaluation (OSE) using the El Nino forecasting system in Japan Meteorological Agency. Proceedings of the oceanographic society of Japan fall meeting (in Japanese).

Guinehut, S., G. Larnicol and P.-Y. le Traon, 2002: Design of an array of profiling floats in the North Atlantic from model simulations. Journal of Marine Systems 35:1-9.

Guinehut, S., P.-Y. Le Traon, G. Larnicol and S. Phillips, 2004: Combining Argo and remote-sensing data to estimate the ocean three-dimensional temperature fields - a first approach based on simulated observations. Journal of Marine Systems 46:85-98.

Hackert, E. C., R. N. Miller and A. J. Busalacchi, 1998: An optimized design for a moored instrument array in the tropical Atlantic Ocean. J. Geophys. Res., 103, 7491-7509.

Hirschi, J., J. Baehr, J. Marotzke, J. Stark, S. Cunningham, and J.-O. Beismann, 2003: A monitoring design for the Atlantic meridional overturning circulation. Geophys. Res. Lett., 30, 1413, doi:10.1029/2002GL016776.

Kallberg, P., 1984: Performance of some di_erent FGGE observation subsets for a period in November 1979. Data Assimilation Systems and Observing System Experiments with particular emphasis on FGGE, Vol. 1, ECMWF, 203-228.

Kharne, S. P., and J. L. Anderson, 2006: An examination of ensemble filters based adqaptive observation methodologies. Tellus, 58A, 179-195.

Kharne, S. P., and J. L. Anderson, 2006: A methodology for fixed observational network design: theory and application to a simulated global prediction system. Tellus, 58A, 523-537.

Kuo, T. H., X. Zou, and W. Huang, 1998: The impact of global positioning system data on the prediction of an extratropical cyclone: An observing system simulation experiment. Dyn. Atmos. Oceans, 27 (1-4), 439-470.

Langland, R. H., and N. L. Baker, 2004: Estimation of observation impact using the NRL atmospheric variational data assimilation adjoint system. Tellus 56A:189-201.

Lawson, W. G., J. A. Hansen, 2004: Implications of stochastic and deterministic filters as ensemble-based data assimilation methods in varying regimes of error growth. Mon. Weath. Rev., 132, 1966-1981.

Le Henaff, M., P. De Mey, P. Marsaleix, 2009: Assessment of observational networks with the representer matrix specra method - application to a 3D coastal model of the Bay of Biscay. Ocean Dynamics 59:3-20.

Le Henaff, M., 2008: Contribution of a Wide-Swath Altimeter in a Shelf Seas Assimilation System: Impact of the Satellite Roll Errors. Journal of Atmospheric and Oceanic Technology 25(11).

Le Henaff, M., 2009: Assessment of observational networks with the Representer Matrix Spectra method - application to a 3D coastal model of the Bay of Biscay. Ocean Dynamics, 59:3–20 DOI 10.1007/s10236-008-0144-7

Le Traon, P.-Y. and G. Dibarboure. 2002. Velocity mapping capabilities of present and future altimeter missions: The role of high frequency signals. Journal of Atmospheric and Oceanic Technology 19:2077-2088.

Lorenz, E. N., K. A. Emmanuel, 1998. Optimal sites for supplementary weather observations: simulation with a small model. J. Atmos. Sci., 55, 399-414.

McIntosh, P. C., 1987: Systematic design of observational arrays, J. Phys. Oceanogr., 17, 885-902.

Miyoshi, T., S. Yamane, 2007: Local ensemble transform Kalman filtering with an AGCM at a T159/L48 resolution. Mon. Weath. Rev., 135, 3841-3861.

Morss, R. E., D. S. Battisti, 2004: Designing efficient observing networks for ENSO prediction. J. Climate, 17, 3074-3089.

Mourre, B., P. De Mey, Y. Menare, F. Lyard, C. Le Provost, 2006: Relative performance of future altimeter systems and tide gauges in constraining a model of North Sea high-frequency barotropic dynamics, Ocean Dynamics, 56, 473-486.

O`Kane, T. J., P. R. Oke, P. A. Sandery, 2010: Predicting the East Australian Current: Errors of the day, Ocean Modelling, submitted.

Oke, P. R., M. Balmaseda, M. Benkiran, J. A. Cummings, E. Dombrowsky, Y. Fujii, S. Guinehut, G. Larnicol, P.-Y. Le Traon, and M. J. Martin, 2010: "Observational Requirements of GODAE Systems" in Proceedings of OceanObs’09: Sustained Ocean Observations and Information for Society (Vol. 2), Venice, Italy, 21-25 September 2009, Hall, J., Harrison, D.E. & Stammer, D., Eds., ESA Publication WPP-306, doi:10.5270/OceanObs09.cwp.67

Oke, P. R., M. Balmaseda, M. Benkiran, J. A. Cummings, E. Dombrowsky, Y. Fujii, S. Guinehut, G. Larnicol, P.-Y. Le Traon, and M. J. Martin, 2009: Observing System Evaluations using GODAE systems, Oceanography, 22(3), 144-153.

Oke, P. R., P. Sakov and E. Schulz, 2009: A comparison of shelf observation platforms for assimilation into an eddy-resolving ocean model. Dynamics of Atmospheres and Oceans, 48, 121-142, doi:10.1016/j.dynatmoce.2009.04.002.

Oke, P. R., T. J. O`Kane, 2011: Observing system design and assessment. Operational Oceanography in the 21st Century, Brassington, G. B., A. Schiller, Eds., Springer Netherlands

Oke, P. R., and A. Schiller, 2007: Impact of Argo, SST and altimeter data on an eddy-resolving ocean reanalysis. Geophysical Research Letters, 34, L19601, doi:10.1029/2007GL031549.

Oke, P. R., and A. Schiller, 2007: A model-based assessment and design of an optimal mooring array for the Indian Ocean. Journal of Climate, 20, 3269-3283.

Pascual A., Y. Faugere, G. Larnicol and P.-Y. Le Traon, 2006: Improved description of the ocean mesoscale variability by combining four satellite altimeters, Geophysical Research Letters 33:doi:10.1029/2005 GL024633.

Pascual A., M.I. Pujol, G. Larnicol, P.-Y. Le Traon, M. H. Rio, 2007: Mesoscale Mapping Capabilities of Multisatellite Altimeter Missions: First Results with Real Data in the Mediterranean Sea. Journal of Marine Systems 65:190-211.

Pascual A., C. Boone, G. Larnicol, P.Y. Le Traon, 2008: On the quality of real time altimeter gridded fields: comparison with in situ data, Journal of Atmospheric and Oceanic Technology, doi: 10.1175/2008JTECHO556

Rabier, F., P. Gauthier, C. Cardinali, R. Langland, M. Tsyrulnikov, A. Lorenc, P. Steinle, R. Gelaro, and K. Koizumi, 2008: An update on THORPEX-related research in data assimilation and observing strategies. Nonlinear Processes in Geophysics 15:81-94.

Sakov, P., and P. R. Oke, 2008: Objective array design: Application to the tropical Indian Ocean, Journal of Atmospheric and Oceanic Technology 25:794-807.

Schiller, A., S. E. Wijffels and G. A. Meyers, 2004: Design requirements for an Argo float array in the Indian Ocean inferred from observing system simulation experiments. Journal of Atmospheric and Oceanic Technology, 21, 1598-1620.

Smith, N. R., and G. Meyers, 1996: An evaluation of expendable bathythermograph and Tropical Atmosphere-Ocean Array data for monitoring tropical ocean variability. J. Geophys. Res., 101, 28489-28501.

Tranchant, B., C.E. Testut, L. Renault, N. Ferry, F. Birol, P. Brasseur, 2008: Expected impact of the future SMOS and Acquarius ocean surface salinity missions in the Mercator Ocean operational systems: new perspectives to monitor ocean circulation. Remote Sensing of Environment 112:1476-1487.

Tremolet, Y., 2008: Computation of observation sensitivity and observation impact in incremental variational data assimilation. Tellus, 60A, 964-978.

Vecchi, G.A., and M.J. Harrison, 2007: An observing system simulation experiment for the Indian Ocean. Journal of Climate, 20:3300-3343.

Vidard, A., D.L.T. Anderson, and M. Balmaseda, 2007: Impact of ocean observation systems on ocean analysis and seasonal forecasts, Monthly Weather Review 135:409-429.

Vigan, X., C. Provost, R. Bleck, P. Courtier, 2000: Sea surface velocities from the sea surface temperature image sequence, 1. Method and validation using primitive equation model output. Journal of Geophysical Research 105:19499-19514.

Walstad, L. J., D. J. McGillicuddy, 2000: Data assimilation for coastal observing systems. Oceanography, 13, 47-53.

Zhang, S., M. J. Harrison, A. Rosati, A. Wittenberg, 2007: System design and evaluation of coupled ensemble data assimilation for global oceanic climate studies, Mon. Weath. Rev., 135, 3541-3564.