A time-dependent photochemical model for Titan’s atmosphere and the origin of H2O

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Table 5

Evolution time t₀ required to match the Herschel or Cassini/CIRS H₂O profiles for both chemical schemes (H08 or L14).

Φ₀(OH)	H08 chemical scheme		L14 chemical scheme
(cm^-2 s^-1)

	Herschel^a	Cassini/CIRS	Herschel^a	Cassini/CIRS
1.0 × 10⁷	400	290	375	260
2.0 × 10⁷	475	360	450	330

Notes. The time constant of the flux decline is τ = 100 years.

^(a)

Poor fit.

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