Artículo
Abstract:
During solar cycle 23 quasi-dropouts of the solar wind (density < 1 cm- 3) were observed. These tenuous winds allow us to probe properties of the magnetosphere and its coupling to the solar wind which would otherwise be obscured by the effect of high density. We focus on five areas which provided new insights into the response of geospace to solar wind variations: (i) the magnetospheric magnetic configuration; (ii) the polar rain; (iii) dayside flux erosion; (iv) magnetosheath waves; and (v) ring current constants. We find: (i) the geostationary field had dipolar strength and was inclined by ≤ 5{ring operator} to the dipolar direction; (ii) the solar wind strahl, and consequently the polar rain, were intensified; (iii) the depression of the geostationary field (Δ BGS) due to dayside flux erosion could be measured and was related to IMF Bz by Δ BGS = - 2.8 + 2.3 Bz (nT); (iv) right-hand electromagnetic ion cyclotron waves were excited alone in the magnetosheath and were generated directly from the temperature anisotropy of the solar wind; (v) ring and magnetopause currents decreased to asymptotic values of 5 and 3 nT, respectively, which are substantially smaller than quiet-time values obtained from statistics. © 2007 Elsevier Ltd. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | Tenuous solar winds: Insights on solar wind-magnetosphere interactions |
| Autor: | Farrugia, C.J.; Gratton, F.T.; Jordanova, V.K.; Matsui, H.; Mühlbachler, S.; Torbert, R.B.; Ogilvie, K.W.; Singer, H.J. |
| Filiación: | Space Science Center, University of New Hampshire, Durham, NH, United States INFIP, CONICET-FCEyN, UBA, Buenos Aires, Argentina Los Alamos National Lab, Los Alamos, NM, United States Max-Planck Institut fuer Sonnensystemforschung, Kathlenburg, Lindau, Germany NASA Goddard Space Flight Center, Greenbelt, MD, United States NOAA Space Environment Center, Boulder, CO, United States |
| Palabras clave: | Dayside erosion; Low density solar wind; Magnetosheath waves; Quiet-time ring current constants; Electromagnetic waves; Geomagnetism; Magnetic anisotropy; Magnetic fields; Magnetosphere; Statistics; Magnetosheath wave; Ring current constant; Solar wind |
| Año: | 2008 |
| Volumen: | 70 |
| Número: | 2-4 |
| Página de inicio: | 371 |
| Página de fin: | 376 |
| DOI: | http://dx.doi.org/10.1016/j.jastp.2007.08.032 |
| Título revista: | Journal of Atmospheric and Solar-Terrestrial Physics |
| Título revista abreviado: | J. Atmos. Sol.-Terr. Phys. |
| ISSN: | 13646826 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13646826_v70_n2-4_p371_Farrugia |
Referencias:
- Anderson, B.J., 1995. In: Song, P., Sonnerup, B.U.O., Thomsen, M. (Eds.), Physics of the Magnetopause Geophysical Monograph, vol. 90, p. 269; Fairfield, D.H., Scudder, J.D., (1985) Journal of Geophysical Research, 90, p. 4055
- Farrugia, C.J., Singer, H.J., Evans, D.S., (2000) Geophysical Research Letters, 27, p. 3773
- Farrugia, C.J., Mühlbachler, S., Biernat, H.K., Torbert, R.B., (2001) Journal of Geophysical Research, 106, pp. 25,517
- Farrugia, C.J., Gratton, F.T., Gnavi, G., (2005) Annales de Geophysique, 23, p. 1317
- Jordanova, V., Farrugia, C.J., Quinn, J.M., (1999) Journal of Geophysical Research, 104, p. 429
- Jordanova, V., Farrugia, C.J., Fennell, J.F., Scudder, J.D., (2001) Journal of Geophysical Research, 106, pp. 25,529
- Jorgensen, A.M., Spence, H.E., Hughes, W.J., Singer, H.J., 2004. Journal of Geophysical Research 109, A12204 doi:10.1029/2003JA010090; Le, G., Chi, P.J., Goedecke, W., (2000) Geophysical Research Letters, 27, p. 2165
- Maynard, N.C., Chen, A.J., (1975) Journal of Geophysical Research, 80, p. 1009
- Nakagawa, T., Nishida, A., Saito, T., (1989) Journal of Geophysical Research, 94, p. 11761
- Ogilvie, K.W., (1995) Space Science Reviews, 71, p. 55
- Ogilvie, K.W., Fitzenreiter, R., Desch, M., (2000) Journal of Geophysical Research, 105 (A12), pp. 27,277
- Richardson, I.G., Berdichevsky, D., Desch, M.D., Farrugia, C.J., (2001) Geophysical Research Letters, 27, p. 3761
- Scudder, J.D., (1995) Space Science Reviews, 71, p. 459
- Sibeck, D.G., (1994) Journal of Geophysical Research, 99, p. 8513
- Sonnerup, B.U.O., Cahill, L.J., (1967) Journal of Geophysical Research, 72, p. 171
- Stern, D.P., (1975) Journal of Geophysical Research, 80, p. 595
- Volland, H., (1973) Journal of Geophysical Research, 78, p. 171
Citas:
---------- APA ----------
Farrugia, C.J., Gratton, F.T., Jordanova, V.K., Matsui, H., Mühlbachler, S., Torbert, R.B., Ogilvie, K.W.,..., Singer, H.J. (2008) . Tenuous solar winds: Insights on solar wind-magnetosphere interactions. Journal of Atmospheric and Solar-Terrestrial Physics, 70(2-4), 371-376.http://dx.doi.org/10.1016/j.jastp.2007.08.032
---------- CHICAGO ----------
Farrugia, C.J., Gratton, F.T., Jordanova, V.K., Matsui, H., Mühlbachler, S., Torbert, R.B., et al. "Tenuous solar winds: Insights on solar wind-magnetosphere interactions" . Journal of Atmospheric and Solar-Terrestrial Physics 70, no. 2-4 (2008) : 371-376.http://dx.doi.org/10.1016/j.jastp.2007.08.032
---------- MLA ----------
Farrugia, C.J., Gratton, F.T., Jordanova, V.K., Matsui, H., Mühlbachler, S., Torbert, R.B., et al. "Tenuous solar winds: Insights on solar wind-magnetosphere interactions" . Journal of Atmospheric and Solar-Terrestrial Physics, vol. 70, no. 2-4, 2008, pp. 371-376.http://dx.doi.org/10.1016/j.jastp.2007.08.032
---------- VANCOUVER ----------
Farrugia, C.J., Gratton, F.T., Jordanova, V.K., Matsui, H., Mühlbachler, S., Torbert, R.B., et al. Tenuous solar winds: Insights on solar wind-magnetosphere interactions. J. Atmos. Sol.-Terr. Phys. 2008;70(2-4):371-376.http://dx.doi.org/10.1016/j.jastp.2007.08.032
