Deposition velocity of H2: a new algorithm for its dependence on soil moisture and temperature

Dieter H. Ehhalt; Franz Rohrer

doi:10.3402/tellusb.v65i0.19904

Deposition velocity of H2: a new algorithm for its dependence on soil moisture and temperature

Tellus B: Chemical and Physical Meteorology

Volume 65 (2013): Issue 1

By: Dieter H. Ehhalt and Franz Rohrer

Open Access

|Jan 2013

Abstract

We derive an analytical expression for the deposition velocity of H₂ on soil, v_d, which explicitly describes the dependence of v_d on the average soil moisture, Θ_w, and temperature, T. It is based on the solution of the equation for vertical diffusion in a two-layer soil model consisting of a dry top layer of a depth, δ, free of H₂ removal, and a moist deeper layer with a uniform H₂ removal rate constant. The dependence of δ on Θ_w is derived from modelled vertical profiles of Θ_w. The resulting dependence of v_d on is compared to the previously used v_d(Θ_w ) derived from a single-layer model, i.e. one without a dry top layer, and with a set of v_d from field measurements. The implications are discussed.

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Articles in this issue

DOI: https://doi.org/10.3402/tellusb.v65i0.19904 | Journal eISSN: 1600-0889

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Language: English

Page range: 19904 - 19904

Submitted on: Oct 17, 2012

Accepted on: Jan 22, 2013

Published on: Jan 1, 2013

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

Keywords:

atmospheric hydrogen,

dry deposition,

2 layer model,

soil uptake of molecular hydrogen,

theoretical dry deposition velocity

© 2013 Dieter H. Ehhalt, Franz Rohrer, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 65 (2013): Issue 1