A simple formulation of the CH<sub>2</sub>O photolysis quantum yields

Röth, E.-P.; Ehhalt, D. H.

doi:https://doi.org/10.5194/acp-15-7195-2015

Articles | Volume 15, issue 13

https://doi.org/10.5194/acp-15-7195-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-15-7195-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 13

Research article

|

01 Jul 2015

Research article |

| 01 Jul 2015

A simple formulation of the CH₂O photolysis quantum yields

E.-P. Röth and D. H. Ehhalt

Abstract. New expressions for the wavelength-dependent photolysis quantum yields of CH₂O, Φ_j, are presented. They are based on combinations of functions of the type A_i/(1+exp[−(1/λ − 1/λ_0i)/b_i]). The parameters A_i, b_i, and λ_0i which have a physical meaning, are obtained by fits to the measured Φ_j data available from literature. The altitude dependence of the photolysis frequencies resulting from the new quantum yield expressions are compared to those derived from the Φ_j recommended by JPL and IUPAC.

Received: 19 Jan 2015 – Discussion started: 10 Mar 2015 – Revised: 08 Jun 2015 – Accepted: 09 Jun 2015 – Published: 01 Jul 2015

A simple formulation of the CH2O photolysis quantum yields

A simple formulation of the CH₂O photolysis quantum yields