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• Tropical Cyclones (problem 6)• Blocking and Storm Tracks (problem 7)• ENSO and its teleconnections (problem 11)• MJO and its teleconnections (problem 5)• Southern Ocean Biases (problem 2)• North Atlantic Ocean biases (problem 8)• Clouds and Radiation (problem 12)• Processes over Africa (problem 3)• Continental Surface Temperature Biases (problem 1)• Polar processes (problem 9)• Conservation (problem 10)These PEGs will report their progress at the next Evaluation Workshop (June 2013).ReferencesAbel, S. J. and I.A. Boutle: An improved representation of the rain drop sizedistribution for single-moment microphysics schemes. Q. J. R. Meteorol. Soc., doi:10.1002/qj.1949, 2012Brown A. and S. Milton, M. Cullen, B. Golding, J. Mitchell and A. Shelly: Unifiedmodelling and prediction of weather and climate: a 25 year journey. Bull. Am.Meteorol. Soc. Submitted, 2012.Bodas-Salcedo A., K. D. Williams, P. R. Field and A. P. Lock: The surfacedownwelling solar radiation surplus over the Southern Ocean in the Met Officemodel: the role of midlatitude cyclone clouds, J. Climate doi:10.1175/JCLI-D-11-00702.1, 2012Cionni, I., V. Eyring, J. F. Lamarque, W. J. Randel, D. S. Stevenson, F. Wu, G. E.Bodeker, T. G. Shepherd, D. T. Shindell, and D. W. Waugh: Ozone database insupport of CMIP5 simulations: results and corresponding radiative forcing, Atmos.Chem. Phys. Discuss., 11, 10875-10933, 2011.Cunningham, S. A., T. Kanzow, D. Rayner, M. O. Baringer,W. E. Johns, J. Marotzke,H. R. Longworth, E. M. Grant, J. J.-M. Hirschi, L. M. Beal, C. S. Meinen and H. L.Bryden. Temporal variability of the Atlantic meridional overturning circulation at26.5N. Science, 317 935–938, doi:10.1126/science.1141304, 2007.Dall’Amico, M., Gray, L., Rosenlof, K., Scaife, A., Shine, K., and Stott, P.:Stratospheric temperature trends: impact of ozone variability and the QBO, ClimateDynamics, 34, 381-398, 2010.Graham T.: Impact of model resolution on the contribution of tropical instabilitywaves to the heat budget of the tropical Pacific Ocean. In preparation.Gregory, D. and Rowntree, P. R.: A massflux convection scheme with representationof cloud ensemble characteristics and stability dependent closure, Mon. Weather Rev.,118, 1483-1506, 1990.
Hewitt, H. T., Copsey, D., Culverwell, I. D., Harris, C. M., Hill, R. S. R., Keen, A. B.,McLaren, A. J., and Hunke, E. C.: Design and implementation of the infrastructure ofHadGEM3: the nextgeneration Met Office climate modelling system, Geosci. ModelDev., 4, 223–253, 2011.Klein S.A., X. Jiang, J. Boyle, S. Malyshev and S. Xie: Diagnosis of the summertimewarm and dry bias over the U.S. Southern Great Plains in the GFDL climate modelusing a weather forecasting approach, Geophys. Res. Lett. 3310.1029/2006GL027567, 2006Madec, G.: NEMO ocean engine, Institut Piere-Simon Laplace (IPSL), France, No.27, ISSN No. 1288–1619, 2008.Milton S., M. Best, K. Williams, D. Walters, A. Lock, J. Edwards, M. Brooks, C.Morcrette, M. Willett and C. Birch: Diagnosing Continental Summertime Biases inthe Unified Model, Met Office internal report, 2012Li, D. and Shine, K. A 4-Dimensional Ozone Climatology for UGAMP Models,UGAMP Internal Report No. 35, April 1995.Madec, G.: NEMO ocean engine, Institut Piere-Simon Laplace (IPSL), France, No.27, ISSN No. 1288–1619, 2008.Morcrette, C. J.: Improvements to a prognostic cloud scheme through changes to itscloud erosion parametrization, Atmos. Sci. Let., 13, 95–102, 2012.Nachtergaele F, Velthuizen Hv, Verelst L, Batjes N, Dijkshoorn J, van Engelen V,Jones A, Fischer G, Montanarella L, Petri M, Prieler S, Teixeira E, Wilberg D, Shi X.:Harmonized World Soil Database version 1.0., 2008.Randel, W.J. and Wu, F: A stratospheric ozone profile data set for 1979-2005:Variability, trends, and comparisons with column ozone data. J Geophys Res, 112,D06313, 2007.Scaife A.A., D. Copsey, C. Gordon, C. Harris, T. Hinton, S. Keeley, A. O'Neill, M.Roberts and K. Williams: Improved Atlantic winter blocking in a climate modelGeophys. Res. Lett. 38. doi:10.1029/2011GL049573, 2011Scherrer, S. C., Croci-Maspoli, M., Schwierz, C., Appenzeller, C. Two-dimensionalindices of atmospheric blocking and their statistical relationship with winter climatepatterns in the Euro-Atlantic region. Int. J. Climatol. 26: 233-249. doi:10.1002/joc.1250, 2006Walters, D. N., Best, M. J., Bushell, A. C., Copsey, D., Edwards, J. M., Falloon, P.D., Harris, C. M., Lock, A. P., Manners, J. C., Morcrette, C. J., Roberts, M. J.,Stratton, R. A., S. Webster, J.M. W., Willett, M. R., Boutle, I. A., Earnshaw, P. D.,Hill, P. G., MacLachlan, C., Martin, G. M., Moufouma-Okia, W., Palmer, M. D.,Petch, J. C., Rooney, G. G., Scaife, A. A., and Williams, K. D.: The Met Office
Page 4 and 5: changed from a uniform value of 0.9
Page 6: Figure 2: DJF precipitation in N96
Page 10 and 11: Sensitivity tests to enhanced entra
Page 12: GA2.0 AMIPGA3.0 AMIP1.5 x entr. NOA
Page 16 and 17: anomalously more moisture available
Page 18 and 19: Figure 18: Mean September Arctic se
Page 22: Unified Model Global Atmosphere 3.0

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