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Wealth from Oceans Workshop on Observing System Design

Wealth from Oceans Workshop on Observing System Design. Peter Oke November 2006 CSIRO Marine and Atmospheric Research http://www.cmar.csiro.au/staff/oke/ email: peter.oke@csiro.au. History and Purpose.

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Wealth from Oceans Workshop on Observing System Design

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  1. Wealth from OceansWorkshop on Observing System Design Peter Oke November 2006 CSIRO Marine and Atmospheric Research http://www.cmar.csiro.au/staff/oke/ email: peter.oke@csiro.au

  2. History and Purpose The possibility of linkages between CSIRO divisions in the area of observing system design has been raised at various high-level meetings within CMAR (e.g., Wealth from Oceans meeting; theme- and stream-leaders meeting; senior science leaders meeting). • The purpose of this workshop is twofold: • 1. inform CSIRO/BoM scientists of the current and developing capabilities in observing system design; • 2. explore possible linkages and synergies with other research groups across CSIRO/BoM in the area of observing system design.

  3. Background • What array of "n" observations is most optimal in order to monitor the variability of "X" in region "Y"? • Example 1: Given 4 moorings that measure temperature in the upper 1000 m of the ocean; where should we deploy the moorings in order to best represent the variability of the Tasman Front? • Example 2: What variable(s) should we observe to best monitor fluctuations in surface Chlorophyll and bottom oxygen in the Derwent River? And where and how often should we measure this/these variable? • Example 3: We're running a predictive model of the ocean circulation off Darwin and we can afford to measure a temperature profile over the top 700 m of the ocean at 3 locations. Where should we make these measurements to best initialise our predictive model?

  4. International Activities

  5. Sample of Array Design Literature • Ballabrera-Poy, J., E. Hackert, R. Murtugudde, and A. J. Busalacchi, 2006: An observing system simulation experiment for an optimal moored instrument array in the tropical Indian Ocean. J. Climate, in press. • Barth, N. and C. Wunsch, 1990: Oceanographic experiment design by simulated annealing. J. Phys. Oceanogr., 20, 1249-1263. • Bennett, A. F., 1985: Array design by inverse methods. Prog. Oceanogr., 15, 129-156. • 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. • CLIVAR/GOOS Indian Ocean Panel and Collaborators, 2006: Understanding the role of the Indian Ocean in the climate system – Implementation plan for sustained observations. Southampton, UK, International CLIVAR Project Office, 76pp. • Fiorelli, E. et al. 2003: Adaptive sampling using feedback control of an autonomous underwater glider fleet. proceedings UUST. • 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 different 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. • 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. • McIntosh, P. C., 1987: Systematic design of observational arrays, J. Phys. Oceanogr., 17, 885-902. • Majumdar et al. 2006: A comparison of adaptive observing guidance for Atlantic tropical cyclones. Mon. Weath. Rev., 134, 2354-2372. • Oke, P. R., and A. Schiller, 2006: A model-based assessment and design of a tropical Indian Ocean mooring array. J. Climate, in press. • Sakov, P., and P. R. Oke, 2006: Optimal array design: Application to the tropical Indian Ocean. Mon. Weath. Rev., submitted. • 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. J. Atmos. Ocean. Tech., 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. • Vecchi, G. A., and M. J. Harrison, 2006: An observing system simulation experiment for the Indian Ocean. J. Climate, in press. • Webster, P.J., E. F. Bradley, C. W. Fairall, J. S. Godfrey, P. Hacker, R. A. Houze, R. Lukas, Y. Serra, J. M. Hummon, T. D. M. Lawrence, C. A. Russell, M. N. Ryan, K. Sahami, P. Zuidema, 2002: The JASMINE Pilot Study. American Meteorological Society. Bulletin, 83, 1603-1630.

  6. Plan for the day • Applications talks • what is the application you’re interested in? • what types of observations are currently made? • what types of observations could be made? • what is the best available representation of the variability of the system of interest? • what aspect of the system do you want to monitor? • what are the practical constraints? • Current capabilities in array design • Discussion • Linkages • Prioritise opportunities • Outline a way forward

  7. Agenda Applications talks 09:30 Peter Oke Introduction 09:40 Eric Schulz HF radar applications 10:00 Susan Wijffels Monitoring shelf scale variability 10:20 Nugzar Margvelashvili Observational needs for sediment modelling 10:40 Lisa Cowen & Claire Spillman BoM's ocean observation network 11:00 Statement of interest … all attendees 11:20 Morning Tea Optimal array design talks 11:40Karen Wild-Allen A holistic approach to array design 12:00Pavel Sakov An ensemble approach to array design 12:40 Peter Oke An EOF approach to array design 13:00 Lunch Discussion 14:00 What are the possible linkages and synergies with other research groups across CSIRO/BoM in the area of observing system design? What is the best source of the variability of interest? Model? Observational? What are the appropriate metrics? What are you trying to monitor?

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