Geomagnetic and ionospheric data analysis over Antarctica: a contribution to the long term trends investigation

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...

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Published in:Journal of Geophysical Research: Space Physics
Main Authors: Alfonsi, Lu., De Franceschi, G., De Santis, A.
Other Authors: Alfonsi, Lu.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, De Franceschi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
Format: Article in Journal/Newspaper
Language:English
Published: EGU - Copernicus Publications 2008
Subjects:
Ionosphere (Polar ionosphere)
Geomagnetism and paleomagnetism (Time variations
secular and long term)
Radio science (Nonlinear phenomena)
01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics
04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals
05. General::05.07. Space and Planetary sciences::05.07.01. Solar-terrestrial interaction
Antarc*
Antarctica
Online Access:http://hdl.handle.net/2122/3892
http://www.ann-geophys.net/26/1173/2008/
id ftingv:oai:www.earth-prints.org:2122/3892
record_format openpolar
institution Open Polar
collection Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
op_collection_id ftingv
language English
topic Ionosphere (Polar ionosphere)
Geomagnetism and paleomagnetism (Time variations
secular and long term)
Radio science (Nonlinear phenomena)
01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics
04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals
05. General::05.07. Space and Planetary sciences::05.07.01. Solar-terrestrial interaction
spellingShingle Ionosphere (Polar ionosphere)
Geomagnetism and paleomagnetism (Time variations
secular and long term)
Radio science (Nonlinear phenomena)
01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics
04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals
05. General::05.07. Space and Planetary sciences::05.07.01. Solar-terrestrial interaction
Alfonsi, Lu.
De Franceschi, G.
De Santis, A.
Geomagnetic and ionospheric data analysis over Antarctica: a contribution to the long term trends investigation
topic_facet Ionosphere (Polar ionosphere)
Geomagnetism and paleomagnetism (Time variations
secular and long term)
Radio science (Nonlinear phenomena)
01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics
04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals
05. General::05.07. Space and Planetary sciences::05.07.01. Solar-terrestrial interaction
description 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. Published 1173-1179 3.9. Fisica della magnetosfera, ionosfera e meteorologia spaziale JCR Journal reserved
author2 Alfonsi, Lu.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
De Franceschi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
format Article in Journal/Newspaper
author Alfonsi, Lu.
De Franceschi, G.
De Santis, A.
author_facet Alfonsi, Lu.
De Franceschi, G.
De Santis, A.
author_sort Alfonsi, Lu.
title Geomagnetic and ionospheric data analysis over Antarctica: a contribution to the long term trends investigation
title_short Geomagnetic and ionospheric data analysis over Antarctica: a contribution to the long term trends investigation
title_full Geomagnetic and ionospheric data analysis over Antarctica: a contribution to the long term trends investigation
title_fullStr Geomagnetic and ionospheric data analysis over Antarctica: a contribution to the long term trends investigation
title_full_unstemmed Geomagnetic and ionospheric data analysis over Antarctica: a contribution to the long term trends investigation
title_sort geomagnetic and ionospheric data analysis over antarctica: a contribution to the long term trends investigation
publisher EGU - Copernicus Publications
publishDate 2008
url http://hdl.handle.net/2122/3892
http://www.ann-geophys.net/26/1173/2008/
genre Antarc*
Antarctica
genre_facet Antarc*
Antarctica
op_relation Annales Geophysicae
5 / 26 (2008)
Alfonsi, L., De Franceschi, G., and Perrone, L.: Long-term trend in the high latitude ionosphere, Physics and Chemistry of the Earth 26/5, 303-307, 2001. Alfonsi, L., De Franceschi, G., Perrone, L., Materassi, M.: Long term trends of the critical frequency of the f2 layer at northern and southern high latitude regions, Phys. Chem. Earth, 27/6-8, 595–600, 2002. Bremer, J.: Ionospheric trends in mid-latitudes as a possible indicator of the atmospheric greenhouse effect, J. Atmos. Terr. Phys., 54, 1505–1511, 1992. Bremer, J.: Long-term trends in different ionospheric layers, Radio Science Bulletin, 315, 22–32, 2005. Clilverd, M. A., Clark, T. D. G., Clarke, E., and Rishbeth, H.: Increased magnetic storm activity from 1868 to 1995, J. Atmos. Sol.-Terr. Phy., 60, 1047–1056, 1998. Clilverd, M. A., Clark, T. D. G., Clarke, E., Rishbeth, H., and Ulich, T.: The causes of long-term change in the aa index, J. Geophys. Res., 107(A12), 1441, doi:10.1029/2001JA000501, 2002. Clilverd, M. A., Clarke, E., Ulich, T., Linthe, J., and Rishbeth, H.: Reconstructing the long-term aa index, J. Geophys. Res., 110, A07205, doi:10.1029/2004JA010762, 2005. Cliver, E. W. and Ling, A. G.: Secular change in geomagnetic indices and the solar open magnetic flux during the first half of the twentieth century, J. Geophys. Res., 107(A10), 1303, 2002. Danilov, A. D.: F2 region response to geomagnetic disturbance, J. Atmos. Sol.-Terr. Phy., 63, 441–449, 2001. De Franceschi, G., De Santis, A., and Pau, S.: Ionospheric mapping by regional spherical harmonic analysis: new developments, Adv. Space Res., 14(12), 61–64, 1994. De Franceschi, G., Gulyaeva, T. L., Perrone, L., and Zolesi, B.: MAC: An Oriented Magnetic Activity Catalogue for Ionospheric Applications, U.R.S.I. International Reference Ionosphere News Letter, 6/4, 5–6, 1999. De Franceschi, G., Gulyaeva, T. 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.
http://hdl.handle.net/2122/3892
http://www.ann-geophys.net/26/1173/2008/
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container_title Journal of Geophysical Research: Space Physics
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spelling ftingv:oai:www.earth-prints.org:2122/3892 2023-05-15T13:51:39+02:00 Geomagnetic and ionospheric data analysis over Antarctica: a contribution to the long term trends investigation Alfonsi, Lu. De Franceschi, G. De Santis, A. Alfonsi, Lu.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia De Franceschi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia 2008 http://hdl.handle.net/2122/3892 http://www.ann-geophys.net/26/1173/2008/ en eng EGU - Copernicus Publications Annales Geophysicae 5 / 26 (2008) Alfonsi, L., De Franceschi, G., and Perrone, L.: Long-term trend in the high latitude ionosphere, Physics and Chemistry of the Earth 26/5, 303-307, 2001. Alfonsi, L., De Franceschi, G., Perrone, L., Materassi, M.: Long term trends of the critical frequency of the f2 layer at northern and southern high latitude regions, Phys. Chem. Earth, 27/6-8, 595–600, 2002. Bremer, J.: Ionospheric trends in mid-latitudes as a possible indicator of the atmospheric greenhouse effect, J. Atmos. Terr. Phys., 54, 1505–1511, 1992. Bremer, J.: Long-term trends in different ionospheric layers, Radio Science Bulletin, 315, 22–32, 2005. Clilverd, M. A., Clark, T. D. G., Clarke, E., and Rishbeth, H.: Increased magnetic storm activity from 1868 to 1995, J. Atmos. Sol.-Terr. Phy., 60, 1047–1056, 1998. Clilverd, M. A., Clark, T. D. G., Clarke, E., Rishbeth, H., and Ulich, T.: The causes of long-term change in the aa index, J. Geophys. Res., 107(A12), 1441, doi:10.1029/2001JA000501, 2002. Clilverd, M. A., Clarke, E., Ulich, T., Linthe, J., and Rishbeth, H.: Reconstructing the long-term aa index, J. Geophys. Res., 110, A07205, doi:10.1029/2004JA010762, 2005. Cliver, E. W. and Ling, A. G.: Secular change in geomagnetic indices and the solar open magnetic flux during the first half of the twentieth century, J. Geophys. Res., 107(A10), 1303, 2002. Danilov, A. D.: F2 region response to geomagnetic disturbance, J. Atmos. Sol.-Terr. Phy., 63, 441–449, 2001. De Franceschi, G., De Santis, A., and Pau, S.: Ionospheric mapping by regional spherical harmonic analysis: new developments, Adv. Space Res., 14(12), 61–64, 1994. De Franceschi, G., Gulyaeva, T. L., Perrone, L., and Zolesi, B.: MAC: An Oriented Magnetic Activity Catalogue for Ionospheric Applications, U.R.S.I. International Reference Ionosphere News Letter, 6/4, 5–6, 1999. De Franceschi, G., Gulyaeva, T. 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. http://hdl.handle.net/2122/3892 http://www.ann-geophys.net/26/1173/2008/ restricted Ionosphere (Polar ionosphere) Geomagnetism and paleomagnetism (Time variations secular and long term) Radio science (Nonlinear phenomena) 01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 05. General::05.07. Space and Planetary sciences::05.07.01. Solar-terrestrial interaction article 2008 ftingv https://doi.org/10.1029/2001JA000501 2022-07-29T06:04:55Z 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. Published 1173-1179 3.9. Fisica della magnetosfera, ionosfera e meteorologia spaziale JCR Journal reserved Article in Journal/Newspaper Antarc* Antarctica Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Journal of Geophysical Research: Space Physics 107 A12 SSH 4-1 SSH 4-7

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