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Simulation of 20th Century climate using<br />
a coupled climate-carbon cycle model<br />
BCC_CSM1.1<br />
Xiaoge Xin, Tongwen Wu, Zaizhi Wang<br />
Climate System Modeling Division,<br />
Beijing Climate Center (NCC),<br />
China Meteorological Administration<br />
Email: xinxg@cma.gov.cn<br />
2010-10-26
Beijing Climate Center Climate System Model<br />
(BCC_CSM)<br />
Atmosphere<br />
(BCC_AGCM)<br />
Coupler<br />
IPCC AR5<br />
Notes:<br />
BCC_AGCM2.0 (T42L26):<br />
Originated from CAM3.<br />
Developed by BCC.<br />
Model Dynamics: Wu et al.(2008,<br />
J.Atmos.Sci.)<br />
Model Physics:Wu et al. (2010,<br />
Climate Dynamics)<br />
BCC_AVIM1.0:<br />
Developed by BCC.<br />
Coupled with the dynamic vegetation<br />
and land carbon cycle processes.<br />
Sea Ice<br />
(SIS)<br />
Ocean<br />
(MOM4_L40)<br />
Land<br />
(BCC_AVIM)<br />
coupled with global<br />
carbon cycle<br />
MOM4_L40 (gx1v1):<br />
Developed by GFDL.<br />
Modified by BCC.<br />
A carbon cycle module (from OCMIP2)<br />
with simple biogeochemical processes<br />
was introduced.<br />
SIS(gx1v1):<br />
Developed by GFDL.
CMIP5 experiments
Experiments have been finished<br />
experiment number Of years<br />
piControl 1 600<br />
esmControl 1 315<br />
historical 3 1850-2005<br />
esmHistorical 1 1850-2005<br />
RCP2.6 1 2006-2099<br />
RCP4.5 1 2006-2099<br />
RCP8.5<br />
1<br />
2006-2099<br />
esmrcp8.5 1 2006-2099<br />
1pctCO2 1 140<br />
4abruptCO2 1 150<br />
esmFdbk1 1 140<br />
Mid-Holocene 1 170<br />
historicalNat 1 1850-2005<br />
historicalGhg 1 1850-2005<br />
AMIP 3 1979-2008<br />
Amip4K 1 1979-2008<br />
Amip4xco2 1 1979-2008<br />
AmipFuture<br />
1<br />
1979-2008
piControl
esmControl<br />
(a) CO2 concentration (ppm)<br />
(b) Global Mean SST
1850-2005 Historical experiment with global carbon cycle<br />
(Tg C/year)<br />
12<br />
Gt C/year<br />
8<br />
4<br />
Uptake by Land<br />
Uptake by ocean<br />
Global total uptake CO2<br />
Anthropogenic CO2 emission<br />
land-air flux<br />
sea-air flux<br />
total flux<br />
emission<br />
0<br />
-4<br />
1840 1880 1920 1960 2000
1976-2005 mean annual CO2 flux (mol/m2/yr, + upward)<br />
( Historical experiment with carbon cycle)<br />
BCC_CSM1.1<br />
Observation<br />
(Takahashi,2002)
Global mean surface air temperature anomalies
1971-2000 mean surface temperature (BCC_CSM1.1 with carbon cycle)
Simulated Precipitation climatology from BCC_CSM<br />
BCC_CSM<br />
OBS
1971-2000 averaged zonal mean precipitation from BCC_CSM1.1.1<br />
( Historical experiment with carbon cycle)
Simulation of winter (JFM) AO<br />
BCC-CSM (38.4%) CCSM3 (27.6%)<br />
(a)BCC-CSM1.0 (38.4%) (b)CCSM3 (27.6%)<br />
(c)GFDL-CM2.1 (36.1%) (d) NCEP/NCAR (32.0%) (32.0%)
Precipitation along 110-120E
Conclusions<br />
• The historical simulation with carbon cycle<br />
by BCC-CSM1.1 performs well in<br />
producing main climate features in the<br />
20th century except for some biases.<br />
• The model BCC-CSM1.1 needs to be<br />
improved in the simulation of ENSO.
(a)<br />
(b)
Leaf Area Index (LAI) from historical experiment with carbon cycle<br />
DJF<br />
JJA<br />
BCC_CSM<br />
BCC_CSM<br />
BOSTON<br />
BOSTON<br />
MPI<br />
MPI
BCC_CSM1.1
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