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http://hdl.handle.net/2122/12749
Authors: | Mikhailov, Andrey* Perrone, Loredana* |
Title: | Longitudinal variations in thermospheric parameters under summer noontime conditions inferred from ionospheric observations: A comparison with empirical models | Journal: | Nature Scientific Reports | Series/Report no.: | /9 (2019) | Issue Date: | 4-Sep-2019 | DOI: | 10.1038/s41598-019-49255-1 | Keywords: | Longitudinal variations in thermospheric and ionospheric parameters Thermosphere |
Subject Classification: | 01.02. Ionosphere | Abstract: | Longitudinal variations in the thermospheric neutral composition ([O] and [N2]) and exospheric temperature Tex have been inferred from June monthly median noontime foF1 and foF2 observations at mid-latitudes to check for consistency with empirical MSIS models. In general, a similarity in longitudinal variations has been demonstrated, and this is interesting, as similar variations were obtained with very different methods and different data sources. Both inferred and MSISE-00 modelled height-integrated O/N2 ratios are comparable to TIMED/GUVI observations only under solar minimum conditions but differ substantially under high solar activity. The retrieved height-integrated O/N2 ratio longitudinal variations are small (∼15%) in comparison to the observed NmF2 variations under high solar activity. The height-integrated O/N2 ratio cannot be incorporated into the F2-layer formation mechanism; therefore, such observations cannot be used for any quantitative interpretation of NmF2 variations. |
Appears in Collections: | Article published / in press |
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s41598-019-49255-1.pdf | 1.17 MB | Adobe PDF | View/Open |
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