<s>
The	O
Community	B-Application
Earth	I-Application
System	I-Application
Model	I-Application
(	O
CESM	B-Application
)	O
is	O
a	O
fully	O
coupled	O
numerical	B-Application
simulation	I-Application
of	O
the	O
Earth	O
system	O
consisting	O
of	O
atmospheric	B-Application
,	O
ocean	O
,	O
ice	B-Application
,	O
land	O
surface	O
,	O
carbon	O
cycle	O
,	O
and	O
other	O
components	O
.	O
</s>
<s>
CESM	B-Application
includes	O
a	O
climate	B-Application
model	I-Application
providing	O
state-of-art	O
simulations	O
of	O
the	O
Earth	O
's	O
past	O
,	O
present	O
,	O
and	O
future	O
.	O
</s>
<s>
It	O
is	O
the	O
successor	O
of	O
the	O
Community	B-Application
Climate	I-Application
System	I-Application
Model	I-Application
(	O
CCSM	B-Application
)	O
,	O
specifically	O
version	O
4	O
(	O
CCSMv4	O
)	O
,	O
which	O
provided	O
the	O
initial	O
atmospheric	B-Application
component	O
for	O
CESM	B-Application
.	O
</s>
<s>
Strong	O
ensemble	B-Application
forecasting	I-Application
capabilities	O
,	O
CESM-LE	B-Application
(	O
CESM-Large	O
Ensemble	O
)	O
,	O
were	O
developed	O
at	O
the	O
onset	O
to	O
control	O
for	O
error	O
and	O
biases	O
across	O
different	O
model	O
runs	O
(	O
realizations	O
)	O
.	O
</s>
<s>
Simulations	O
from	O
the	O
Earth	O
's	O
surface	O
through	O
the	O
thermosphere	O
are	O
generated	O
utilizing	O
the	O
Whole	O
Atmosphere	O
Community	B-Application
Climate	I-Application
Model	I-Application
(	O
WACCM	O
)	O
.	O
</s>
<s>
CESM1	B-Application
was	O
released	O
in	O
2010	O
with	O
primary	O
development	O
by	O
the	O
Climate	O
and	O
Global	O
Dynamics	O
Division	O
(	O
CGD	O
)	O
of	O
the	O
National	O
Center	O
for	O
Atmospheric	B-Application
Research	O
(	O
NCAR	O
)	O
,	O
and	O
significant	O
funding	O
by	O
the	O
National	O
Science	O
Foundation	O
(	O
NSF	O
)	O
and	O
the	O
Department	O
of	O
Energy	O
(	O
DoE	O
)	O
.	O
</s>
