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CGILS Updated Results

Minghua Zhang, Chris Bretherton, Peter Blossey

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CGILS Updated Results

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  1. Minghua Zhang, Chris Bretherton, Peter Blossey Phil Austin, Julio Bacmeister, Sandrine Bony, Florent Brient, Anning Cheng, Stephan de Roode,Tony Del Genio, Charmaine Franklin, Chris Golaz, Cecile Hanny, Thijs Heus, Francesco Isotta, Dufresne Jean-Louis, In-Sik Kang, Hideaki Kawai, Martin Koehler, Suvarchal Kumar, Vince Larson, Adrian Lock, Ulrike Lohman, Marat Khairoutdinov, Andrea Molod, Roel Neggers, Sing-Bin Park, Irina Sandu, Ryan Senkbeil, Pier Siebesma, Colombe Siegenthaler-Le Drian, Bjorn Stevens, Max Suarez, Kuan-man Xu, Mark Webb, Audrey Wolfe, Ming Zhao, CGILS Updated Results GCSS-BLCWG Meeting, September 29-30, 2010 KNMI

  2. LES (5) DALES* (de Roode, Siebesma) SAM* (Blossey, Bretherton, Khairdinov) UCLA* (Heus, Sandu, Stevens) UCLA/LaRC* (Cheng, Xu) UKMO* (Lock) SCM (16)CAM4* (Hannay, Zhang)CAM5* (Hannay, Zhang)CCC* (Austin)CSIRO* (Franklin)ECHAM5* (Siegenthaler-LeDrian, Lohman, Isotta)ECHAM6* (Kumar, Stevens)ECMWF* (Koehler)GFDL (Golaz, Zhao)GISS* (Wolfe, Del Genio)GSFC* (Molod, Bacmeister, Suarez)JMA* (Kawai)KNMI-RACMO* (Neggers)LMD* (Brient, Bony, Jean-Louis)SNU (Park, Kang)UKMO* (Webb, Lock)UWM* (Larson, Senkbeil) * Indicates models that carried out the revised runs

  3. s12 S11 S6 GPCI

  4. Purpose: To understand the causes of cloud feedbacks, and thus climate sensitivities of climate models. Objectives: To understand the physical mechanisms of cloud feedbacks in SCMs To interpret GCM cloud feedbacks by using SCM results To Evaluate the SCM cloud feedbacks using LES simulations

  5. RH Fixed (moist adiabat) T(z) T(z) Warm Pool Cold Tongue CGILS (CFMIP-GCSS Intercomparison of Large-Eddy and Single-Column Models) Need to be relevant to observations and GCMs (Zhang and Bretherton, 2008)

  6. The second round of SCM simulations Forcing revised to be the same as in LES Control case temperature and relative humidity are now directly from ECMWF Interim Analysis for July 2003 from Martin Koehler. 1. Lower troposphere above the boundary layer is warmer, with more realistic inversion height and strength. 2. More moisture in the boundary layer for LES to start with. 3. Subsidence extended to below 1000 mb, thus slightly stronger than before below 900 mb.

  7. Cloud feedbacks at S6

  8. Cloud feedbacks at S6 Round 1 versus Round 2

  9. S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  10. Points to Note Some models maintain the same sign of feedbacks or negligible feedback at all three locations Negative feedback: CAM4, ECMWF, JMA, UWM Positive feedback: CAM5, CCC, CSIRO, ECHAM6, LMD, UKMO Flipped: GISS, GSFC, RACMO (in the same direction: positive at s6, negative at s12). Feedbacks at the two locations of S11 and S12 mostly show the same sign in the models

  11. S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  12. Points to Note At S6, Two models show little feedback (CSIRO and UKMOL38) The small group show negative feedback (CAM4, ECMWF, JMA UWM) The majority show positive feedback (CAM5, CCC, ECHAM6, GISS, GSFC, LMD, RACMO) At S11, Two models show little feedback (ECHAM6 and LMD) About half of the models show positive feedback (CAM5, CCC, CSIRO, RACMO, UKMO) Half of the models show negative feedback (CAM4, ECMWF, GISS, GSFC, JMA, UWM) At S12, Two models show little feedback (ECHAM6 and LMD) Three models show positive feedback (CCC, CSIRO, UKMO) The majority show negative feedback (CAM4, CAM5, ECMWF, GISS, GSFC, JMA, RACOM,UWM)

  13. Instead of discussing clouds at one location at a time (the GCSS perspective), in the following, we will show all cloud types for one model at a time (the GCM perspective) LES results are presented in Chris’s talk. This talk will only cover SCM results.

  14. CAM4 S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  15. CAM4 s6 ctl CAM4 s6 p2k CAM4 s11 ctl CAM4 s11 p2k

  16. CAM4 s12 ctl CAM4 s12 p2k CAM4 ql s6 CAM4 ql s11 CAM4 ql s12

  17. CAM5 S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  18. CAM5 s6 ctl s6 p2k s11 ctl s11 p2k

  19. CAM5 s12 ctl s12 p2k ql at s6 ql at s11 ql at s12

  20. CCC S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  21. CCC s6 ctl s6 p2k s11 ctl s11 p2k

  22. CCC s12 ctl s12 p2k ql at s6 ql at s11 ql at s12

  23. ECHAM6 S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  24. ECHAM6 s6 ctl s6 p2k s11 ctl s11 p2k

  25. ECHAM6 s12 ctl s12 p2k ql at s6 ql at s11 ql at s12

  26. ECMWF S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  27. ECMWF s6 ctl s6 p2k s11 ctl s11 p2k

  28. ECMWF s12 ctl s12 p2k ql at s6 ql at s11 ql at s12

  29. ECMWF2 S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  30. ECMWF2 s6 ctl s6 p2k s11 ctl s11 p2k

  31. ECMWF2 s12 ctl s12 p2k ql at s6 ql at s11 ql at s12

  32. GISS S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  33. GISS s6 ctl s6 p2k s11 ctl s11 p2k

  34. GISS s12 ctl s12 p2k ql at s6 ql at s11 ql at s12

  35. GSFC S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  36. GSFC s6 ctl s6 p2k s11 ctl s11 p2k

  37. GSFC s12 ctl s12 p2k ql at s6 ql at s11 ql at s12

  38. JMA S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  39. JMA s6 ctl s6 p2k s11 ctl s11 p2k

  40. JMA s12 ctl s12 p2k ql at s6 ql at s11 ql at s12

  41. LMD S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  42. LMD s6 ctl s6 p2k s11 ctl s11 p2k

  43. LMD s12 ctl s12 p2k ql at s6 ql at s11 ql at s12

  44. S6 RACMO DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  45. RACMO s6 ctl s6 p2k s11 ctl s11 p2k

  46. RACMO s12 ctl s12 p2k ql at s6 ql at s11 ql at s12

  47. UKMOL38 S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

  48. UKMOL38 s6 ctl s6 p2k s11 ctl s11 p2k

  49. UKMOL38 s12 ctl s12 p2k ql at s6 ql at s11 ql at s12

  50. UWM S6 DCRF at S6 S11 DCRF at S11 S12 DCRF at S12

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