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| Titel |
Heterogeneous loss of OH on NaCl and NH4NO3 at tropospheric temperatures |
| VerfasserIn |
A. V. Ivanov, Y. M. Gershenzon, F. Gratpanche, P. Devolder, J.-P. Sawerysyn |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 14, no. 6 ; Nr. 14, no. 6, S.659-664 |
| Datensatznummer |
250012325
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| Publikation (Nr.) |
 copernicus.org/angeo-14-659-1996.pdf |
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| Zusammenfassung |
| The uptake coefficients (Γ) for
OH radicals on some dry salts of tropospheric interest (NaCl and NH4NO3)
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: ΓOHNaCl=(1.2±0.7)×10–5exp[(1750±200)/T]
and ΓOHNH4NO3=(1.4±0.5)×10–4exp[(1000±100)/T].
These Arrhenius expressions lead to very similar Γ-values (~4×10–3)
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. |
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