**Table 4:** Parameters of the Galaxy model (values at the solar circle).
Name	Symbol	Unit	Value	Reference
Radial extension of Galactic disk	$R\ensuremath{_{\rm G}}$	kpc	18	[1]
Solar distance to Galactic center	$R_{\odot}$	kpc	8.5	[1]
Half height H₂**	$h\ensuremath{_{\rm\ensuremath{\element{H}_2}}}$	pc	59	[1]
Half height CNM/WNM**	$h\ensuremath{_{\rm H {\sc i}}}$	pc	115	[1]
Half height WIM**	$h\ensuremath{_{\rm WIM}}$	pc	10³	[2]
H₂ mass surface density*	$\Sigma\ensuremath{_{\rm\ensuremath{\element{H}_2}}}$	$\ensuremath {{M}_{\rm\odot }}$ pc^-2	1.4	[1]
CNM mass surface density*	$\Sigma\ensuremath{_{\rm CNM}}$	$\ensuremath {{M}_{\rm\odot }}$ pc^-2	2.25	[1]
WNM mass surface density*	$\Sigma\ensuremath{_{\rm WNM}}$	$\ensuremath {{M}_{\rm\odot }}$ pc^-2	2.75	[1]
WIM mass surface density*	$\Sigma\ensuremath{_{\rm WIM}}$	$\ensuremath {{M}_{\rm\odot }}$ pc^-2	1.85	[2,1]
Ensemble averaged clump density*	$n\ensuremath{_{\rm ens}}$	$\ensuremath {{\rm cm}^{-3}}$	10^3.8
CNM density*	$n\ensuremath{_{\rm CNM}}$	$\ensuremath {{\rm cm}^{-3}}$	32.9	[1]
WNM/WIM density*	$n\ensuremath{_{\rm WNM}}$	$\ensuremath {{\rm cm}^{-3}}$	0.349	[1]
CNM temperature*	$T\ensuremath{_{\rm CNM}}$	K	85	[1]
WNM/WIM temperature*	$T\ensuremath{_{\rm WNM}}$	K	7860	[1]
FUV-flux**	$\chi$	$\ensuremath {\chi _{\rm D}}$	10^1.8
Metallicity**	Z	Z $_{\hbox{$\odot$ }}$	1
Clump mass spectral index **	$\alpha$		1.8	[3]
Mass-size relation index**	$\gamma$		2.3	[3]
Upper clump mass limit**	$m\ensuremath {_{\rm u}}$	$\ensuremath {{M}_{\rm\odot }}$	10²	[3]
Lower clump mass limit**	$m\ensuremath {_{\rm l}}$	$\ensuremath {{M}_{\rm\odot }}$	10^-3	[3]

* For distribution over Galactocentric radius see Fig. 2 or text.
*** Assumed to be constant over the whole Galactic disk (see text). [1] Wolfire et al. (2003);
[2] Reynolds (1991); [3] Heithausen et al. (1998).