<s>
ECHAM	B-Application
is	O
a	O
general	B-Application
circulation	I-Application
model	I-Application
(	O
GCM	O
)	O
developed	O
by	O
the	O
Max	O
Planck	O
Institute	O
for	O
Meteorology	O
,	O
one	O
of	O
the	O
research	O
organisations	O
of	O
the	O
Max	O
Planck	O
Society	O
.	O
</s>
<s>
The	O
default	O
configuration	O
of	O
the	O
model	O
resolves	O
the	O
atmosphere	O
up	O
to	O
10	O
hPa	O
(	O
primarily	O
used	O
to	O
study	O
the	O
lower	O
atmosphere	O
)	O
,	O
but	O
it	O
can	O
be	O
reconfigured	O
to	O
0.01	O
hPa	O
for	O
use	O
in	O
studying	O
the	O
stratosphere	O
and	O
lower	O
mesosphere	B-General_Concept
.	O
</s>
<s>
Different	O
versions	O
of	O
ECHAM	B-Application
,	O
primarily	O
different	O
configurations	O
of	O
ECHAM5	O
,	O
have	O
been	O
the	O
basis	O
of	O
many	O
publications	O
,	O
listed	O
on	O
the	O
ECHAM5	O
website	O
.	O
</s>
<s>
MPI-ECHAM5	O
was	O
used	O
in	O
the	O
IPCC	O
Fourth	O
Assessment	O
Report	O
,	O
alongside	O
many	O
other	O
GCMs	B-Application
from	O
different	O
countries	O
.	O
</s>
<s>
It	O
appears	O
to	O
be	O
one	O
of	O
the	O
more	O
accurate	O
GCMs	B-Application
.	O
</s>
<s>
ECHAM6	O
is	O
currently	O
the	O
most	O
advanced	O
version	O
of	O
the	O
ECHAM	B-Application
models	O
.	O
</s>
<s>
ECHAM6	O
is	O
an	O
atmospheric	O
general	B-Application
circulation	I-Application
model	I-Application
,	O
and	O
as	O
such	O
focuses	O
on	O
the	O
coupling	O
between	O
diabatic	O
processes	O
and	O
large-scale	O
circulations	O
,	O
both	O
of	O
which	O
are	O
ultimately	O
driven	O
by	O
radiative	O
forcing	O
.	O
</s>
