دورية أكاديمية
Anomalous electron density events in the quiet summer ionosphere at solar minimum over Millstone Hill
| العنوان: | Anomalous electron density events in the quiet summer ionosphere at solar minimum over Millstone Hill |
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| المؤلفون: | A. V. Pavlo, M. J. Buonsanto |
| المصدر: | Annales Geophysicae, Vol 16, Pp 460-469 (1998) |
| بيانات النشر: | Copernicus Publications, 1998. |
| سنة النشر: | 1998 |
| المجموعة: | LCC:Science LCC:Physics LCC:Geophysics. Cosmic physics |
| مصطلحات موضوعية: | Science, Physics, QC1-999, Geophysics. Cosmic physics, QC801-809 |
| الوصف: | This study compares the observed behavior of the F region ionosphere over Millstone Hill with calculations from the IZMIRAN model for solar minimum for the geomagnetically quiet period 23-25 June 1986, when anomalously low values of hmF2(<200 km) were observed. We found that these low values of hmF2 (seen as a G condition on ionograms) exist in the ionosphere due to a decrease of production rates of oxygen ions resulting from low values of atomic oxygen density. Results show that determination of a G condition using incoherent scatter radar data is sensitive both to the true concentration of O+ relative to the molecular ions, and to the ion composition model assumed in the data reduction process. The increase in the O++ N 2 loss rate due to vibrationally excited N2 produces a reduction in NmF2 of typically 5-10% , but as large as 15% , bringing the model and data into better agreement. The effect of vibrationally excited NO+ ions on electron densities is negligible.Key words. Ionosphere (Ion chemistry and composition; Ionosphere-atmosphere interactions; Mid-latitude ionosphere). |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0992-7689 1432-0576 |
| Relation: | https://www.ann-geophys.net/16/460/1998/angeo-16-460-1998.pdf; https://doaj.org/toc/0992-7689; https://doaj.org/toc/1432-0576 |
| DOI: | 10.1007/s00585-998-0460-8 |
| URL الوصول: | https://doaj.org/article/2786b3e13e694d508ba124ccebf30f84 |
| رقم الأكسشن: | edsdoj.2786b3e13e694d508ba124ccebf30f84 |
| قاعدة البيانات: | Directory of Open Access Journals |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 09927689 14320576 |
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| DOI: | 10.1007/s00585-998-0460-8 |