. 2009 Jun 12;44(37):4678–4734. doi: 10.1016/j.atmosenv.2009.06.005

Table 5.

Tropospheric ozone budget derived from a multi model analysis (Stevenson et al., 2006: S06) and from the IPCC Third Assessment Report (TAR), IPCC (2001). STE^inf describes the ozone influx from the stratosphere derived by STE^inf = L + D − P. The TAR best estimate of STE based on observations was much less than the model mean.

	Production	Loss	Deposition	STE^inf	Burden	τO₃	τCH₄^a
	Tg O₃ yr⁻¹	Tg O₃ yr⁻¹	Tg O₃ yr⁻¹	Tg O₃ yr⁻¹	Tg O₃	days	yr
S06	4974 ± 223	4577 ± 291	953 ± 154	556 ± 154	336 ± 27	22.2 ± 2.2	8.45 ± 0.38
TAR (models)	3420	3470	770	770	300	24	8.4
TAR (analysis)				475

Note that this is the budget lifetime of CH₄ in the participating models and note the residence time of a CH₄ perturbation, which is estimated to be 12 yr.