Evalua&on, applica&on and development of ESM in China
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1 Evalua&on, applica&on and development of ESM in China Contributors: Bin Wang 1,2 1. LASG, Ins&tute of Atmospheric Physics, CAS 2. CESS, Tsinghua University 3. Beijing Normal University 4. Beijing Climate Center 5. First Ins&tute of Oceanography 16 th WGCM, Sep, 2012, Hamburg, Germany 1
2 Outline Preliminary evalua&ons on CMIP5 Important applica&ons Progress in coupling techniques Future development for AR6 2
3 CMIP5 models in China Group Name Ins&tu&on Model Name LASG CESS LASG Ins&tute of Atmospheric Physics, Chinese Academy of Sciences; Tsinghua University Ins&tute of Atmospheric Physics, Chinese Academy of Sciences FGOALS g2 FGOALS s2 BNU Beijing Normal University BNU ESM BCC Beijing Climate Center BCC CSM 1.1 FIO First Ins&tute of Oceanography FIO ESM1.0 3
4 Main Variables Evaluated Variable name Component Evalua&on Method Precipita&on Globe Root Mean Square Error Global mean SAT anomaly (SATA) Tropic SSTA annual cycle Warm extremes Asian Monsoon ENSO Detrend of SATA Pacific , 21 regions JJAS mean, annual cycle index SD, variance annual cycle, amplitude, zonal wind stress Taylor skill (Taylor, 2001) PaSern Correla&on Rela&ve RMS PaSern Correla&on Direct comparison or correla&on with observa&on 4
5 Global area weighted mean RMSE of Precipita&on ( )(OBS: GPCP) Mean: 1.31; Max: 1.72; Min: 1.09 (unit: mm/day) 5
6 20 th Century SAT Varia&on ( ) Mean: 0.52; Max: 0.64; Min:
7 Tropic Pacific Annual Cycle (2⁰S 2⁰N, 120⁰E 80⁰W) Mean: 0.63; Max: 0.82; Min:
8 Performance of AR5 models on presenting warm extremes for at 21 regions CRU CPC (Zhao et al, 2012) CMIP3 best Rela&ve RMS worst CMIP5 8
9 Skills of CMIP Models on JJAS Asian Precipita&on and Wind (OBS: GPCP) (Zhou et al. 2012; Sperber et al. 2012) BNU ESM FGOALS s2 BCC CSM1.1 CNRM CM5 FGOALS g2 MIROC ESM (OBS: ERA40) 9
10 Summer monsoon annual cycle index Rela&ve rainfall rate in the Bengal Bay region peak 5 mm/day 5 mm/day Dura&on Onset Withdraw (Sperber et al. 2012) 10
11 Withdraw Peak Asian summer monsoon CMIP5 MMM CMIP3 MMM BNU ESM FGOALS g2 China MMM FGOALS s2 BCC CSM1.1 Onset CMIP5 MMM CMIP3 MMM China MMM BNU ESM FGOALS g2 FGOALS s2 BCC CSM1.1 Dura&on (Zhou et al. 2012; Sperber et al. 2012) 1) Comparing with CMIP3 models, CMIP5 models improve the Asian summer monsoon significantly; 2) China MMM performs better than CMIP3 MMM on onset and duration, but worse on withdraw and peak; 3) FGOALS-g2 presents better onset and duration but worse withdraw and peak than both CMIP3 MMM and CMIP5 MMM; 4) FGOALS-g2 presents better onset, withdraw and duration but worse peak than China MMM. (OBS: GPCP) 11
12 Taylor skills of variance annual cycle Nino 3.4 region Hurrell2008 HadISST FGOALS g2 BNU ESM HadGEM2 ES FGOALS s2 FIO ESM1.0 BCC CSM1.1 GFDL CM2p1 IPSL CM5A MR IPSL CM5A LR INMCM3.0 Standard devia&on Other models: CNRM CM5, INMCM4.0, MIROC5, MIROC ESM, MPI ESM LR, NorESM1 M (Huang et al, 2012) 12
13 Nino 3.4 region Amplitude of power spectrum INMCM3.0 BCC CSM1.1 FIO ESM1.0 BNU ESM MIROC5 FGOALS s2 NorESM1 M Hurrell2008+ERA40 HadISST+ERA40 FGOALS g2 INMCM4.0 Width of zonal wind stress anomalies Other models: CNRM CM5, HadGEM2 ES, IPSL CM5A LR, IPSL CM5A MR, MIROC ESM, MPI ESM LR (Huang et al, 2012) 13
14 Outline Preliminary evalua&ons on CMIP5 Important applica&ons Progress in coupling techniques Future development for AR6 14
15 Afribu&on, Centurial Projec&on and Decadal Predic&on Historical CMIP5 models Simula&ons CESM BNU ESM FGOALS FIO ESM Future BCC CSM Projec&ons Modeling scheme courtesy of Dong, 2010 hsp:// /index.jsp Developed Countries All Countries Developed Countries Developing Countries Ems Hist ( ) All Countries Cancun Pledge and future reduc&on ( ) Developing Countries 15
16 Developed and developing world responsibili&es for historical climate change ALL = All countries emission= =AX1+NX1 AX1= developed countries emissions ; NX1= developing countries emissions; CO 2 concentra&on : ESM Hist from 10 CMIP5 models 16 Developed: 61% and 71%; Developing: 39% and 29%; CO 2 radia&ve forcing: Developed: 53% and 62%; Developing: 47% and 38%; Air temperature: Developed: 60% and 64% Developing: 40% and 36% Wei et al., 2012, PNAS
17 Developed and developing world responsibili&es for CO 2 mi&ga&on ABNB =all countries nonmi&ga&on; ACNB =only developed countries follow Cancun ( )+ 80% reduc&ons by 2050 and zero emissions by 2100; ABNC =only developing countries follow Cancun ( )+ 50% reduc&ons by 2050 and zero emissions by 2100; ACNC =all countries mi&ga&on Contribu&ons to reduc&on of global warming: Developed: 33% and 35% Developing: 67% and 65% Mi&ga&on goal: Current mi&ga&on cannot control rising temperature within 2 in It is necessary to fill the gap with more ambi&ous mi&ga&on efforts. Wei et al., 2012, PNAS
18 Surface Air Temperature Anomalies by FGOALS g2 (2 nd sample of historical run) Surface air temperature anomalies (SATA) FGOALS-g2 Cor:0.84 HadCRUT FGOALS-g2 (Cor=0.678) FGOALS-g2 (Cor=0.786) HadCRUT3 HadCRUT3 18
19 30-year predictions of SATA by FGOALS-g2 After detrend Hindcast (Forecast) 19
20 Outline Preliminary evalua&ons on CMIP5 Important applica&ons Progress in coupling techniques Future development for AR6 20
21 Lack of direct flux exchange in available couplers NCAR Coupler OASIS Coupler Centralized flux coupler without direct flux exchange (Liu et al, 2011) Decentralized non flux coupler without direct flux exchange 21
22 C Coupler: to overcome the imperfec&on (the first coupler developed by Chinese scien&sts) Centralized flux coupler for modulariza&on and standardiza&on Direct flux exchange for befer parallel efficiency of high resolu&on models (Liu et al, 2011) 22
23 Ensemble coupling solware framework Online ensemble tool for coupled climate model Motivation How weather noise / atmospheric model uncertainty impacts the climate response? Different scenarios for online ensembles Multi IC Ensemble Multi Model Ensemble (Xue et al, 2011) 23
24 (Xue et al, 2012) Online Mul& ini&al condi&on ensemble Single ini&al condi&on ENSO Online Mul& model ensemble Offline Mul& model ensemble (Xue et al, 2011) 24
25 Outline Preliminary evalua&ons on CMIP5 Important applica&ons Progress in coupling techniques Future development for AR6 25
26 Future Plan for AR6 Further evalua&on of China CMIP5 models and other CMIP5 models for understanding of uncertain&es in these models; Development of high resolu&on AGCM and OGCM (0.5⁰ 0.1⁰ in horizontal and 50 layers in ver&cal within 5 years); Development of earth system model based on our own coupler: C Coupler; Improvements of online ensemble coupling framework and ensemble coupling strategies; Improvements of dynamical cores, physical parameteriza&ons, and carbon cycle processes. 26
27 Thank you 27
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