Workshop on Climate Sensitivity - Index of

More documents

Recommendations

Info

CFMIP Meeting with PRP diagnostics. Alternative definitions of CRF which do not suffer from the cloud masking effect in the clear-sky fluxes will be sought. Recommend: Individual modelling groups to perform PRP analysis “in house” using standardised techniques. 4. Compositing and Clustering A novel area of research for CFMIP is developing methodologies (e.g. compositing and clustering by cloud types) to evaluate aspects of clouds in models that can be demonstrated to be important for the cloud response to climate change and hence, climate sensitivity. It is recognised that there is a need to explore links between different parts of the hydrological cycle – CFMIP should aim to develop techniques in this area e.g. storm/precipitation compositing (George Tselioudis, personal communication) Recommend: Compositing techniques should be applied to model results submitted to AMIP and CMIP and IPCC AR4. Recommend: Develop compositing techniques that represent the variations of combinations of cloud types that are associated with distinct meteorological states. Recommend: AR4 participants should submit results to CFMIP. 5. Other Issues Recommend: Reinforce that the atmospheric model used for CFMIP should be the same as that used for AMIP and CMIP. Recommend: CFMIP should provide feedback to the GEWEX Cloud System Study (GCSS) on systematic problems in areas important for cloud response, and should also advise on experimental design for climate change studies using Cloud Resolving Models. Advantage of idealised +/-2K runs (as well as backward compatibility) is being able to compare models’ response with same warming, but it is an unrealistic one. Imposing structured SST changes (e.g. using the CMIP mean or median) would maintain that advantage while reducing the unrealism and so is recommended for the future. It could also be used for ensembles of perturbed physics, as discussed in BOG1. Recommend: From CMIP create ensemble mean structured SST mean change and test as an alternative method to slab ocean models for evaluation cloud feedbacks. DRAFT BOG3: Climate sensitivity and response Recommendations 1. Effective and equilibrium climate sensitivity Climate sensitivity is generally defined as the global mean (indicated by angular brackets) surface temperature change
CFMIP Meeting sensitivity parameter s e links the forcing to the temperature response as / = − → s e (3) s = → s e where the arrow indicates the limit as equilibrium is approached. All terms, including the effective sensitivity parameter s(t) = 1/ Λ ˆ (t) are nominally functions of time. When the system reaches a new equilibrium, together with the associated effective global sensitivity s(t) in order to more completely understand and characterize the behaviour of the system and its evolution. R1. It is recommended that climate modelling groups calculate the temporal evolution of the global effective sensitivity s(t) as part of their standard diagnostic information (including providing it as part of IPCC <strong>Workshop</strong> on Climate Sensitivity – 101 (4)
Page 1:
INTERGOVERNMENTAL PANEL ON CLIMATE
Page 5:
Contents Scoping Document for the I
Page 8 and 9:
Aims Scoping Document The aims of t
Page 11 and 12:
Introduction to Breakout Groups Bre
Page 13 and 14:
Breakout Groups Breakout Group 3: R
Page 15 and 16:
Extended Abstracts Water Vapour Fee
Page 17 and 18:
IPCC Workshop on C
Page 19 and 20:
References Allan, R. P. and Slingo,
Page 21 and 22:
IPCC Workshop on C
Page 23 and 24:
water, we have between 0.5 and 1 un
Page 25 and 26:
IPCC Workshop on C
Page 27 and 28:
IPCC Workshop on C
Page 29 and 30:
IPCC Workshop on C
Page 31 and 32:
esponse to the insolation forcing h
Page 33 and 34:
IPCC Workshop on C
Page 35:
IPCC Workshop on C
Page 38 and 39:
1.0 0.5 0.0 makes the dominant cont
Page 41 and 42:
IPCC Workshop on C
Page 43:
Crowley, T.J. Science, 289, 270-277
Page 46 and 47:
forcing included match the observed
Page 49 and 50:
IPCC Workshop on C
Page 51 and 52:
IPCC Workshop on C
Page 53 and 54:
STEP 2: Mass is converted into (the
Page 55: focuses on sensitivities to particu
Page 58 and 59: In summary, the low climate sensiti
Page 61 and 62: IPCC Workshop on C
Page 65: References Gates, W. L., 1992, AMIP
Page 68 and 69: Reference Meehl, G.A., W.M. Washing
Page 70 and 71: (4) Errors arise from the assumptio
Page 72 and 73: Extended Abstracts: Otto-Bliesner e
Page 74 and 75: of the atmosphere reaches a level t
Page 79: climate. The cooling during the LGM
Page 82 and 83: normal one. However, there is no wa
Page 84 and 85: Extended Abstracts: Raper
Page 86 and 87: Extended Abstracts: Raper
Page 88 and 89: Figure 1 shows the lower tropospher
Page 97 and 98: cloud top pressure (hPa) a) ISCCP N
Page 99 and 100: Annex 1: Report on the Joint WCRP C
Page 101 and 102: CFMIP Meeting selected additions sh
Page 103 and 104: CFMIP Meeting between the two model
Page 105: CFMIP Meeting uncertainties in sens
Page 109 and 110: CFMIP Meeting model experiments inc
Page 111 and 112: Annex 2: Letter to Modeling Groups
Page 113: RF Intercomparison 4. CO 2 feedback
Page 116 and 117: Sandrine BONY Laboratoire de Mété
Page 118 and 119: Qiang FU Atmospheric Sciences Unive
Page 120 and 121: Akio KITOH Meteorological Research
Page 122 and 123: Akira NODA Meteorological Research
Page 124 and 125: Silvina SOLMAN National Council of
show all

Workshop on Climate Sensitivity - Index of

Create successful ePaper yourself

Delete template?

Save as template?