Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/3892| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Alfonsi, Lu.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.contributor.authorall | De Franceschi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.contributor.authorall | De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.date.accessioned | 2008-06-11T14:47:02Z | en |
| dc.date.available | 2008-06-11T14:47:02Z | en |
| dc.date.issued | 2008 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/3892 | en |
| dc.description.abstract | The analysis of the f oF2 ionosonde data acquired at mid and high latitudes reveals a general decreasing of the F2 plasma frequency over more than two solar cycles, showing steeper trends over the high latitude stations and, in particular, over Antarctica. A careful analysis of the f oF2 hourly data, opportunely catalogued in different levels of magneto-ionospheric conditions, highlights the role of the geomagnetic activity in the secular change of the ionosphere and confirms the latitudinal dependence of the trends. These results suggest interesting relations with some recent findings on the rapid decrease of some important physical and statistical quantities related to the geomagnetic field over the whole globe and mainly in Antarctica. In this paper we discuss the possibility of a connection between the ionospheric trends and a possible imminent geomagnetic reversal or excursion. | en |
| dc.language.iso | English | en |
| dc.publisher.name | EGU - Copernicus Publications | en |
| dc.relation.ispartof | Annales Geophysicae | en |
| dc.relation.ispartofseries | 5 / 26 (2008) | en |
| dc.subject | Ionosphere (Polar ionosphere) | en |
| dc.subject | Geomagnetism and paleomagnetism (Time variations, secular and long term) | en |
| dc.subject | Radio science (Nonlinear phenomena) | en |
| dc.title | Geomagnetic and ionospheric data analysis over Antarctica: a contribution to the long term trends investigation | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.description.pagenumber | 1173-1179 | en |
| dc.identifier.URL | http://www.ann-geophys.net/26/1173/2008/ | en |
| dc.subject.INGV | 01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics | en |
| dc.subject.INGV | 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals | en |
| dc.subject.INGV | 05. General::05.07. Space and Planetary sciences::05.07.01. Solar-terrestrial interaction | en |
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L., Perrone, L., and Zolesi, B.: A statistical analysis of ionospheric irregularities at mid and high latitudes, Inverse Problems, 18, 67–78, 2002. De Santis, A., De Franceschi, G., Zolesi, B., and Cander, Lj. R.: Regional modelling and mapping of the ionospheric characteristic parameters by Spherical Cap Harmonic Expansion, Adv. Space Res., 12(6), 279–282, 1992. De Santis, A., Falcone, C., and Lowes, F. J.: Remarks on the meansquare values of the geomagnetic field and its components, Annali di Geofisica, 38(2), 167–175, 1995. De Santis, A., Torta, J. M., and Gaya-Piqu´e, L. R.: The first Antarctic geomagnetic Reference Model (ARM), Geophys. Res. Lett., 29(8), 1192, doi:10.1029/2002GL014675, 2002. De Santis, A., Tozzi, R., and Gaya-Piqu´e, L. R.: Information content and K-entropy of the present geomagnetic field, Earth Planet. Sci. Lett., 218, 269–275, 2004. De Santis, A.: How persistent is the present trend of the geomagnetic field to decay and, possibly, to reverse?, Phys. Earth Planet. In., 162, 217–226, 2007. Gaya-Piqu´e, L. R., Ravat, D., De Santis, A., and Torta, J. M.: New model alternatives for improving the representation of the core magnetic field of Antarctica, Antarct. Sci., 18(1), 101–109, 2006. Gubbins D.: Mechanism for geomagnetic polarity reversals, Nature, 326, 167–169, 1987. Gubbins, D., Jones, A. L., and Finlay, C. C.: Fall in Earth’s magnetic field is erratic, Science, 312, 900–902, 2006. Gulyaeva, T. L.: Forecast of recurrent magnetic storms one day in advance, Geomagnetism and Aeronomy, 42(N2), 169–174, 2002. Lastovicka, J.: On the role of solar and geomagnetic activiy in longterm trends in the atmosphere-ionosphere system, J. Atmos. Sol.- Terr. Phy., 67, 83–92, 2005. Lastovicka, J., Mikhailov, A. V., Ulich, Th., Bremer, J., Elias, A. G., Ortiz de Adler, N., Jara, V., Abarca del Rio, R., Foppiano, A. J., Ovalle, E., and Danilov, A. D.: Long-term trends in foF2: A comparison of various methods, J. Atmos. Sol.-Terr. Phy., 68/17, 1854–1870, 2006. Lockwood, M. and Stamper, R.: Long-term drift of the coronal source magnetic flux and the total solar irradiance, Geophys. Res. Lett., 26, 2461–2464, 1999. Lowes, F. J.: Mean square values on the sphere of spherical har-monic vector fields, J. Geophys. Res., 71, 2179, 1966. Macmillan, S. and Maus, S.: International Geomagnetic Reference Field – the tenth generation, Earth Planets Space, 57, 1135–1140, 2005. Mikhailov, A. V. and Marin, D.: Geomagnetic control of the f0F2 long-term trends, Ann. Geophys. 18, 653–665, 2000. Mursula, K. and Martini, D.: Centennial increase in geomagnetic activity: Latitudinal differences and global estimates, J. Geophys. Res., 111, A08209, doi:10.1029/2005JA011549, 2006. Perrone, L. and De Franceschi, G.: A correlation study between time-weighted magnetic indices and the high-latitude ionosphere, Phys. Chem. Earth, 24, 389–392, 1999. Perrone, L., De Franceschi, G., and Gulyaeva, T.: The timeweighted magnetic indices ap( ), PC( ) and AE( ) and their correlation to the southern high latitude ionosphere, Phys. Chem. Earth, 26/5, 331–334, 2001. Piggott, W. R. and Rawer, K.: U.R.S.I. Handbook of Ionogram Interpretation and Reduction, World Data Center A for Solar- Terrestrial Physics, NOAA, Boulder, Colorado, 1972. Rajaram, G., Arun, T., Dhar, A., and Patil, A. G.: Rapid decrease in total magnetic field F at Antarctic stations-its relationship to core-mantle features, Antarct. Sci., 14(1), 61–68, 2002. Richardson, I. G., Cliver, E. W., and Cane, H. V.: Long-term trends in interplanetary magnetic field strength and solar wind structure during the twentieth century, J. Geophys. Res., 107(A10), 1304, doi:10.1029/2001JA000507, 2002. Rishbeth, H.: The quadrupole ionosphere, Ann. Geophys., 3, 293– 298, 1985, http://www.ann-geophys.net/3/293/1985/. Rishbeth, H.: Long-term changes in the ionosphere, Adv. Space Phys., 20, 2149–2155, 1997. Shannon, C.: A mathematical theory of communication, Bell Syst. Tech. J., 27, 379–423, 623–656, 1948. Svalgaard, L., Cliver, E., W., and Le Sager, P.: IHV : A new longterm geomagnetic index, Adv. Space Res., 34, 436–439, 2004. Ulich, T., Clilverd, M. A., and Rishbeth, H.: Determining Long- Term Change in the Ionosphere EOS, Transactions American Geophysical Union, 84, 52, 581, 2003. Wrenn, G. L.: Time-Wighted Accumulations ap( ) and Kp( ), J. Geophys. Res., 92, 125–129, 1987. Wu, J. and Wilkinson, P. J.: Time-weighted indices as predictors of ionospheric behaviour, J. Atmos. Terr. Phy., 57, 1736–1770, 1995. | 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 | Alfonsi, Lu. | en |
| dc.contributor.author | De Franceschi, G. | en |
| dc.contributor.author | De Santis, A. | 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 |
| 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.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
| crisitem.author.orcid | 0000-0002-1806-9327 | - |
| crisitem.author.orcid | 0000-0002-3943-6798 | - |
| crisitem.author.orcid | 0000-0002-3941-656X | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.classification.parent | 01. Atmosphere | - |
| crisitem.classification.parent | 04. Solid Earth | - |
| crisitem.classification.parent | 05. General | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| Appears in Collections: | Article published / in press | |
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