Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/5055
DC Field | Value | Language |
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dc.contributor.authorall | Pietrella, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
dc.contributor.authorall | Bianchi, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
dc.date.accessioned | 2009-05-25T08:26:41Z | en |
dc.date.available | 2009-05-25T08:26:41Z | en |
dc.date.issued | 2009-07-01 | en |
dc.identifier.uri | http://hdl.handle.net/2122/5055 | en |
dc.description.abstract | Hourly systematic measurements of the highest frequency reflected by the sporadic-E layer (foEs) recorded at the Rome ionospheric observatory (Italy, 41.8° N, 12.5° E), were considered during the period January 1976–December 2007, to calculate the percentage of occurrence of sporadic-E layer with frequencies foEs greater than a given threshold value fT, P(foEs > fT). To study possible influences from solar activity, measurements of foEs recorded near the periods of minimum and maximum solar activity, were also considered. Measurements of foEs recorded for the period January 2000–December 2007 were analysed to study the influence of magnetic activity on foEs occurrence frequency. The results are provided as maps showing P(foEs > fT) with foEs above the selected level (fT=3, 4, 5, 6, 7, 8, and 9 MHz), for each hour from 00.00 L.T. to 23.00 L.T. and for each month. The results reveal a relatively low P(foEs > fT) before sunrise and after sunset in all seasons; the most significant P(foEs > fT) occur during daytime in summer months; intense formations of sporadic-E layer occur rarely during the year; P(foEs > fT) does not depend significantly on solar and geomagnetic activity. 2009 COSPAR. Published by Elsevier Ltd. All rights reserved. | en |
dc.language.iso | English | en |
dc.publisher.name | Elsevier Ltd | en |
dc.relation.ispartof | Advances in Space Research | en |
dc.relation.ispartofseries | 1 / 44 ( 2009 ) | en |
dc.subject | Sporadic-E layer | en |
dc.subject | Geomagnetic activity | en |
dc.subject | Solar activity | en |
dc.subject | foEs occurrence | en |
dc.title | Occurrence of sporadic-E layer over the ionospheric station of Rome: Analysis of data for thirty-two years | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 72 - 81 | en |
dc.subject.INGV | 01. Atmosphere::01.03. Magnetosphere::01.03.99. General or miscellaneous | en |
dc.identifier.doi | 10.1016/j.asr.2009.03.006 | en |
dc.relation.references | Awe, O. Studies of nighttime Es at Ibadan near the magnetic equator. J. Atmos. Terr. Phys. 33, 1209–1222, 1971. Baggaley, W.J. Three solar cycles of day-time southern hemisphere Es activity. J. Atmos. Terr. Phys. 46 (3), 207–210, 1984. Baggaley, W.J. Changes in the frequency distribution of foEs and FbEs over two solar cycles. Planet. Space Sci. 33 (4), 457–459, 1985a. Baggaley, W.J. Seasonal characteristics of daytime Es occurrence in the southern hemisphere. J. Atmos. Terr. Phys. 47 (6), 611–614, 1985b. Baggaley, W.J. Structure in the seasonal variations of Es at southern latitudes. J. Atmos. Terr. Phys. 48 (4), 385–391, 1986. Chimonas, G. Enhancement of sporadic E by horizontal transport within the layer. J. Geophys. Res. 76 (19), 4578–4586, 1971. Closs, R.L. Low latitude sporadic E associated with geomagnetic activity. J. Atmos. Terr. Phys. 31, 873–875, 1969. Haldoupis, C., Pancheva, D. Planetary waves and midlatitude sporadic E layers: strong experimental evidence for a close relationship. J. Geophys. Res. 107 (A6), doi:10.1029/2001JA000212, 2002. Haldoupis, C., Pancheva, D., Mitchell, N.J. A study of tidal planetary wave periodicities present in midlatitude sporadic E layers. J. Geophys. Res. 109, A02302, doi:10.1029/2003JA010253, 2004. Haldoupis, C., Meek, C., Cristakis, N., Pancheva, D., Bourdillon, A. Ionogram height-time-intensity observations of descending sporadic E layers at mid-latitude. J. Atmos. Sol. – Terr. Phys. 68, 539–557, 2006. Harwood, J. Some observations of the occurrence and movements of sporadic E ionization. J. Atmos. Terr. Phys. 20, 243–262, 1961. Houminer, Z., Russel, C.J., Dyson, P.L., Bennet, J.A. Study of sporadic-E clouds by backscatter radar. Ann. Geophys. 14, 1060–1065, 1996. Kotadia, K.M. Sporadic-E ionization over Ahmadabad through the half solar cycle 1954–1957. J. Atmos. Terr. Phys. 31, 1137–1146, 1969. Lastovicka, J. Forcing of the ionosphere by waves from below. J. Atmos. Sol. – Terr. Phys. 68, 479–497, 2006. Maksyutin, S.V., Sherstyukov, O.N. Dependence of E-sporadic layer response on solar and geomagnetic activity variations from its ion composition. Adv. Space Res. 35, 1496–1499, 2005. Mathews, J.D. Sporadic E: current views and recent progress. J. Atmos. Sol. – Terr. Phys. 60 (4), 413–435, 1998. Rowe Jr., J.F. A statistical summary of Arecibo night-time E region observations. J. Geophys. Res. 78, 6811–6817, 1973. Sharma, S., Chandra, H. Ionospheric effects of the Leonid Meteor Showers over Ahmedabad, 2002. Available from: <http://www.ursi. org/Proceedings/ProcGA02/papers/p1728.pdf/>. Szuszczewicz, E.P., Roble, R.G., Wilkinson, P.J., Hanbaba, R. Coupling mechanisms in the lower ionospheric–thermospheric system and manifestations in the formation and dynamics of intermediate descending layers. J. Atmos. Terr. Phys. 57, 1483–1496, 1995. Tanaka, T. Skywave backscatter observations of sporadic E over Japan. J. Atmos. Terr. Phys. 41, 203–215, 1979. Tan, Z., Huang, X., Wang, S. A preliminary investigation of ionospheric Es-s over Wuchang, China. Journal of Atmospheric and Terrestrial Physics 47, 959–963, 1985. Triskova, L. On the seasonal variation in the temperate Es occurrence, J. Atmos. Terr. Phys. 36, 861–869, 1974. Tsunoda, R., Yamamoto, M., Igarashi, K., Hocke, K., Fukao, S. Quasi periodic radar echoes from midlatitude sporadic E and role of the 5- day planetary wave. Geophys. Res. Lett. 25 (7), 951–954, 1998. Whitehead, J.D. Formation of the sporadic E layer in the temperate zones. Nature 188, 567, 1960. Whitehead, J.D. Production and prediction of sporadic E. Rev. Geophys. Space Phys. 8, 65–144, 1970. Whitehead, J.D. Recent work on mid-latitude and equatorial sporadic-E. J. Atmos. Terr. Phys. 51 (5), 401–424, 1989. Wilkinson, P.J., Szuszczewicz, E.P., Roble, R.G. Measurements and modelling of intermediate, descending, and sporadic layers in the lower ionosphere: results and implications for global-scale ionosphericthermospheric studies. Geophys. Res. Lett. 19 (2), 95–98, 1992. | en |
dc.description.obiettivoSpecifico | 3.9. Fisica della magnetosfera, ionosfera e meteorologia spaziale | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | reserved | en |
dc.contributor.author | Pietrella, M. | en |
dc.contributor.author | Bianchi, C. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
crisitem.author.orcid | 0000-0001-9069-4090 | - |
crisitem.author.orcid | 0000-0002-0217-5379 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 01. Atmosphere | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
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