Heterogeneous loss of OH on NaCl and NH4NO3 at tropospheric temperatures
Item
Title (Dublin Core)
Heterogeneous loss of OH on NaCl and NH4NO3 at tropospheric temperatures
Description (Dublin Core)
The uptake coefficients (Γ) for OH radicals on some dry salts of tropospheric interest (NaCl and NH<sub>4</sub>NO<sub>3</sub>) have been investigated as a function of temperature using the flow tube technique combined with an EPR spectrometer as a detection method. The temperature dependence of Γ-values measured over the temperature range 245–340 K can be expressed in Arrhenius form: Γ<sup>OH</sup><sub>NaCl</sub>=(1.2±0.7)×10<sup>–5</sup>exp[(1750±200)/T] and Γ<sup>OH</sup><sub>NH4NO3</sub>=(1.4±0.5)×10<sup>–4</sup>exp[(1000±100)/T]. These Arrhenius expressions lead to very similar Γ-values (~4×10<sup>–3</sup>) for both salts studied at 300 K. It is shown that the heterogeneous OH sinks on solids aerosol play a very minor role in tropospheric chemistry in comparison with the homogeneous sinks.
Creator (Dublin Core)
Ivanov, A. V.
Gershenzon, Y. M.
Gratpanche, F.
Devolder, P.
Sawerysyn, J.-P.
Date (Dublin Core)
2018-09-27
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.1007/s00585-996-0659-5
https://angeo.copernicus.org/articles/14/659/1996/
Source (Dublin Core)
eISSN: 1432-0576
Language (Dublin Core)
eng
