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| Titel |
Response of Middle Atmospheric Hydroxyl Radical to the 27-Day Solar Forcing |
| VerfasserIn |
King-Fai Li, Qiong Zhang, Shuhui Wang, Stanley P. Sander, Yuk L. Yung |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250104919
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| Publikation (Nr.) |
 EGU/EGU2015-4360.pdf |
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| Zusammenfassung |
| In this study, we use the Microwave Limb Sound (MLS) data to examine the response of
middle atmospheric hydroxyl radicals (OH) to the 27-day solar rotational variability during
the solar maximum activity year (2004–2005). The results are compared to the simulations of
the 1-D photochemical model KINETICS using different UV variabilities. Shapiro et al.
[Atmos. Chem. Phys., 12, 3181–3188, 2012] have examined the 27-day solar cycle
modulation in tropical mesospheric OH measured by MLS, and found that the OH
27-day solar response is 1% per 1% change in Lyman-α at 80 km. However, as
different band-pass filter is applied, the OH response varies significantly. An optimal
filter is selected based on the convergence of OH response with respect to filter
window size. The results show that in the middle atmosphere model simulations
underestimate the hydroxyl radical variabilities to short term solar forcing by 20%–50%. |
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