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Ray Bell Supervisors – Prof. Pier Luigi Vidale , Dr. Jane Strachan and Dr. Kevin Hodges

‘Dynamically simulated tropic storms in a changing climate and their impact on the assessment of future climate risk’ - PhD project. Ray Bell Supervisors – Prof. Pier Luigi Vidale , Dr. Jane Strachan and Dr. Kevin Hodges. About me. MOcean ( Hons ) – NOCS. Dissertation – Wind and wave

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Ray Bell Supervisors – Prof. Pier Luigi Vidale , Dr. Jane Strachan and Dr. Kevin Hodges

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  1. ‘Dynamically simulated tropic storms in a changing climate and their impact on the assessment of future climate risk’ - PhD project Ray Bell Supervisors – Prof. Pier Luigi Vidale, Dr. Jane Strachan and Dr. Kevin Hodges

  2. About me • MOcean(Hons) – NOCS. Dissertation – Wind and wave variability in re-analysis and satellite measurements • Met office placement 2010 Waves team – wave ensemble system

  3. Motivation • Impacts on the climate system, removing heat and moisture from the ocean affecting large scale circulation • Socio-economic impacts • Associated risk with climate change Katrina 2005. Current damage $91.5bn (ICAT, 2011)

  4. PhD outline • Does dynamically simulated TC activity (location, frequency, intensity, structure and energetics) change in model simulations including anthropogenic forcing? • Will the predictability of TC variability based on natural climate variability of large scale atmospheric modes break down under anthropogenic climate change?

  5. PhD project • HiGEM (N144, 1/3o ocean) - Higher resolution can resolve TCs better, important for intensity (Bengtsson et al, 2007) • TRACK (Hodges) to indentify and track TCs • Compare TCs in the transient run to the control run

  6. Previous studies • Natural variability vs. Climate change (Webster et al, 2005; Pielke et al, 2005) • Consensus on decreasing frequency globally (McDonald et al, 2005; Yamada et al, 2010) however contrasting regional changes • Possible stronger winds (Bengtsson et al, 2007) Increasing GCM resolution... • Increase in rainfall (Knutson et al, 2010)

  7. Work done so far • MSc modules (>50% of my time) • Reading lists – Structure and dynamics, natural variability, climate change • Tracking HiGAM data (developing TRACK, Linux and IDL skills)

  8. HiGAM 1979 Min mslp

  9. Typhoon track

  10. Future work • Reading – Natural variability, climate change • 1st chapter finished by October • TRACK stats • Tracking the HiGEM transient runs – compare to control runs and re-analysis/obs (Jane) • CMIP5 data? • Air-sea interaction?

  11. Collaborations Username: metoffice Password: metoffice_tc www.met.reading.ac.uk/~df019697

  12. Questions ??? References Bengtsson, L., Hodges, K. I., and Esch, M. (2007). Tropical cyclones in a T159 resolution global climate model: comparison with observations and re-analysis. Tellus A, 59, 396–416. Knutson, T. R., McBridge, J. L., Chan, J., Emanuel, K., Holland, G., Landsea, C., Held, I., Kossin, J. P., Srivastava, A. K., and Sugi, M. (2010). Tropical cyclones and climate change. Nat. Geosci., 3, 157–163. McDonald, R., Bleaken, D., Creswell, D., Pop e, V., and Senior, C. (2005). Tropical storms: representation and diagnosis in climate models and the impacts of climate change. J. Climate, 18, 1275–1262. Pielke, R. A. J., Landsea, C., Mayfield, M., Laver, J., and Pasch, R. (2005). Hurricanes and global warming. Bul l. Amer. Meteorol. Soc., 86, 1571–1575. Webster, P., Holland, G., Curry, J., and Chang, H.-R. (2005). Changes in tropical cyclone number, duration, and intensity in a warming environment. Science, 309, 1844–1846.

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