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Relevant bibliographies by topics / Polar cusps

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Academic literature on the topic 'Polar cusps'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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Journal articles on the topic "Polar cusps"

1

Tsyganenko, N. A. "Magnetic field and electric currents in the vicinity of polar cusps as inferred from Polar and Cluster data." Annales Geophysicae 27, no. 4 (April 2, 2009): 1573–82. http://dx.doi.org/10.5194/angeo-27-1573-2009.

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Abstract. A detailed statistical study of the magnetic structure of the dayside polar cusps is presented, based on multi-year sets of magnetometer data of Polar and Cluster spacecraft, taken in 1996–2006 and 2001–2007, respectively. Thanks to the dense data coverage in both Northern and Southern Hemispheres, the analysis spanned nearly the entire length of the cusps, from low altitudes to the cusp "throat" and the magnetosheath. Subsets of data falling inside the polar cusp "funnels" were selected with the help of TS05 and IGRF magnetic field models, taking into account the dipole tilt and the solar wind/IMF conditions. The selection funnels were shifted within ±10° of SM latitude around the model cusp location, and linear regression parameters were calculated for each sliding subset, further divided into 10 bins of distance in the range 2≤R≤12 RE, with the following results. (1) Diamagnetic depression, caused by the penetrated magnetosheath plasma, becomes first visible at R~4–5 RE, rapidly deepens with growing R, peaks at R~6–9 RE, and then partially subsides and widens in latitude at the cusp's outer end. (2) The depression peak is systematically shifted poleward (by ~2° of the footpoint latitude) with respect to the model cusp field line, passing through the min{|B|} point at the magnetopause. (3) At all radial distances, clear and distinct peaks of the correlation between the local By and By(IMF) and of the corresponding proportionality coefficient are observed. A remarkably regular variation of that coefficient with R quantitatively confirms the field-aligned geometry of the cusp currents associated with the IMF By, found in earlier observations.

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Błęcki, Jan, Roman Wronowski, Jan Słomiński, Sergey Savin, Rafał Iwański, and Roger Haagmans. "Comparative Study of the Energetic Electrons Registered Together with the Broad Band Emissions in Different Regions of the Ionosphere." Artificial Satellites 55, no. 4 (December 1, 2020): 130–49. http://dx.doi.org/10.2478/arsa-2020-0010.

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Abstract ELF/VLF waves have been registered in the outer polar cusps simultaneously with high energy electrons fluxes by the satellites Magion 4 (subsatellite to Interball 1), Polar and CLUSTER. Further, we discuss similar observations in the different regions of the ionosphere, where DEMETER registered energetic electrons. The DEMETER satellite operating on the nearly polar orbit at the altitude 650 km crossed different regions in the ionosphere. Registrations of ELF/VLF/HF waves together with the energetic electrons in the polar cusp, in the ionospheric trough and over thunderstorm areas are presented in this paper. The three satellites of ESA’s Swarm mission provide additional information on the ELF waves in the mentioned areas together with electron density and temperature. A brief discussion of the generation of these emissions by the so-called “fan instability” (FI) and beam instability is presented.

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3

Chen, S. H., S. A. Boardsen, S. F. Fung, J. L. Green, R. L. Kessel, L. C. Tan, T. E. Eastman, and J. D. Craven. "Exterior and interior polar cusps: Observations from Hawkeye." Journal of Geophysical Research: Space Physics 102, A6 (June 1, 1997): 11335–47. http://dx.doi.org/10.1029/97ja00743.

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4

Candidi, M., and C. I. Meng. "Low-altitude observations of the conjugate polar cusps." Journal of Geophysical Research 93, A2 (1988): 923. http://dx.doi.org/10.1029/ja093ia02p00923.

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5

Tsyganenko, N. A., and C. T. Russell. "Magnetic signatures of the distant polar cusps: Observations by Polar and quantitative modeling." Journal of Geophysical Research: Space Physics 104, A11 (November 1, 1999): 24939–55. http://dx.doi.org/10.1029/1999ja900279.

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6

Lin, N., E. S. Lee, J. McFadden, G. Parks, M. Wilber, M. Maksimovic, N. Cornilleau-Wehrlin, et al. "VLF/ELF wave activity in the vicinity of the polar cusp: Cluster observations." Annales Geophysicae 24, no. 7 (August 9, 2006): 1993–2004. http://dx.doi.org/10.5194/angeo-24-1993-2006.

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Abstract. Observations by the Cluster spacecraft of VLF/ELF wave activity show distinct signatures for different regions in the vicinity of high altitude polar cusps, which are identified by using magnetic field and plasma data along spacecraft trajectories. These waves include: (1) Broad band magnetic noise observed in the polar cusp at frequencies from several Hz to ~100 Hz, below the local electron cyclotron frequency, fce. Similar magnetic noise is also observed in the high latitude magnetosheath and the magnetopause boundary layer. (2) Strong broad band electrostatic emissions observed in the cusp, in the magnetosheath, and in the high latitude magnetopause boundary layer, at frequencies extending from several Hz to tens of kHz, with maximum intensities below ~100 Hz. (3) Narrow-band electromagnetic whistler waves at frequencies ~0.2–0.6 fce, frequently observed in the closed boundary layer (CBL) adjacent to the polar cusp. These waves are for the first time observed in this region to be accompanied by counter-streaming electron beams of ~100 eV, which suggests that the waves are excited by these electrons through wave-particle interaction. (4) Narrow-band electrostatic waves observed slightly above the local fce in the CBL. (5) Lion roars, observed in the high latitude magnetosheath, often in magnetic troughs of mirror mode oscillations. The above wave signatures can serve as indicators of the regions in the vicinity of the magnetospheric cusp.

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7

Savin, S., J. Büchner, G. Consolini, B. Nikutowski, L. Zelenyi, E. Amata, H. U. Auster, et al. "On the properties of turbulent boundary layer over polar cusps." Nonlinear Processes in Geophysics 9, no. 5/6 (December 31, 2002): 443–51. http://dx.doi.org/10.5194/npg-9-443-2002.

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Abstract. We study properties of nonlinear magnetic fluctuations in the turbulent boundary layer (TBL) over polar cusps during a typical TBL crossing on 19 June 1998. Interball-1data in the summer TBL are compared with that of Geotail in solar wind (SW) and Polar in the northern TBL. In the TBL two characteristic slopes are seen: ~ - 1 at (0.004- 0.08) Hz and ~ - 2.2 at (0.08-2) Hz. We present evidences that random current sheets with features of coherent solitons can result in: (i) slopes of ~ - 1 in the magnetic power spectra; (ii) demagnetization of the SW plasma in "diamagnetic bubbles"; (iii) nonlinear, presumably, 3-wave phase coupling with cascade features; (iiii) departure from the Gaussian statistics. We discuss the above TBL properties in terms of intermittency and self-organization of nonlinear systems, and compare them with kinetic simulations of reconnected current sheet at the nonlinear state. Virtual satellite data in the model current sheet reproduce valuable cascade-like spectral and bi-spectral properties of the TBL turbulence.

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8

Tsyganenko, N. A., and V. A. Andreeva. "Empirical Modeling of Dayside Magnetic Structures Associated With Polar Cusps." Journal of Geophysical Research: Space Physics 123, no. 11 (November 2018): 9078–92. http://dx.doi.org/10.1029/2018ja025881.

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9

Voigt, G. H., and R. A. Wolf. "On the configuration of the polar cusps in Earth's magnetosphere." Journal of Geophysical Research 90, A5 (1985): 4046. http://dx.doi.org/10.1029/ja090ia05p04046.

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10

Yordanova, E., J. Bergman, G. Consolini, M. Kretzschmar, M. Materassi, B. Popielawska, M. Roca-Sogorb, K. Stasiewicz, and A. W. Wernik. "Anisotropic scaling features and complexity in magnetospheric-cusp: a case study." Nonlinear Processes in Geophysics 12, no. 6 (September 14, 2005): 817–25. http://dx.doi.org/10.5194/npg-12-817-2005.

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Abstract. Magnetospheric cusps are high-latitude regions characterized by a highly turbulent plasma, playing a special role in the solar wind-magnetosphere interaction. Here, using POLAR satellite magnetic field vector measurements we investigate the anisotropic scaling features of the magnetic field fluctuations in the northern cusp region. Our results seem to support the hypothesis of a 2D-MHD turbulent scenario which is consequence of a strong background magnetic field. The observed turbulent fluctuations reveal a high degree of complexity, which might be due to the interplay of many competing scales. A discussion of our findings in connection with the complex scenario proposed by Chang et al. (2004) is provided.

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Dissertations / Theses on the topic "Polar cusps"

1

Rentz, Stefanie. "The upper atmospheric fountain effect in the polar cusp region." Potsdam GFZ, Helmholtz-Zentrum, 2009. http://d-nb.info/99594962X/34.

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2

Rae, Iain Jonathan. "Joint ground/space observations of transient phenomena associated with the Polar cusp." Thesis, University of Leicester, 2000. http://hdl.handle.net/2381/30636.

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This thesis concerns the study of solar wind entry into the near-Earth environment via the process of time-varying reconnection. Specifically, the plasma signatures associated with this magnetic flux transfer were investigated in the context of the upstream interplanetary conditions. Thus study is primarily accomplished with the Polar spacecraft, situated in the mid-altitude cusp, but also utilises low-altitude spacecraft and ground-based instrumentation to trace solar wind entry into the near-Earth space environment. A detailed case study is presented of the energy-dispersed pulsed particle signatures (PPS) observed in the mid-altitude cusp by Polar. Two discrete time-scales of PPS were observed and linked to the prevailing IMF conditions. The simultaneous observation of two different frequency components has not previously been reported in the mid-altitude cusp. A second, complementary case study was conducted utilising the definitions outlined in the previous study to relate PPS to the low-altitude and ionospheric signatures of transient reconnection. Although there is no direct 1:1 relationship between the mid-, low-altitude and ionospheric signatures of reconnection in this case study, the ionospheric footprints of all three signatures are closely located in time and space. Finally, the location and occurrence statistics of PPS observed in the magnetosphere and traced into the ionosphere are investigated with respect to IMF orientation and the solar wind dynamic pressure. PPS were found to occur over a wide range of latitudes and local times, and also found to favour southward IMF in terms of increased numbers and percentage occurrence, than its positive Bz counterpart.

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3

Rentz, Stefanie [Verfasser]. "The upper atmospheric fountain effect in the polar cusp region / von Stefanie Rentz." 2009. http://d-nb.info/994406029/34.

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Books on the topic "Polar cusps"

1

Holtet, Jan A., and Alv Egeland, eds. The Polar Cusp. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5295-9.

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2

NATO Advanced Research Workshop on the Morphology and Dynamics of the Polar Cusp (1984 Lillehammer, Norway). The polar cusp. Dordrecht, Holland: D. Reidel, 1985.

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3

NATO Advanced Study Institute on Polar Cap Boundary Phenomena (1997 Longyearbyen, Norway). Polar cap boundary phenomena: Proceedings of the NATO Advanced Study Institute on Polar Cap Boundary Phenomena, Longyearbyen, 4-13 June 1997. Dordrecht: Kluwer Academic Publishers, 1998.

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4

Wong, H. K. Investigation of plasma instabilities in the polar cusp: Semi-annual progress report for the period 1 March 1993 through 31 August 1993. San Antonio, TX: SRI, 1993.

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5

United States. National Aeronautics and Space Administration., ed. Studies of interactive plasma processes in the polar cusp. San Antonio, Texas: Southwest Research Institute, Instrumentation and Space Research Division, 1992.

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6

Egeland, A., and Jan A. Holtet. Polar Cusp. Springer, 2011.

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7

A, Troit͡s︡kai͡a︡ V., and Liperovskiĭ V. A, eds. Fizicheskie i͡a︡vlenii͡a︡ v dnevnykh poli͡a︡rnykh kaspakh. Moskva: Mezhduvedomstvennyĭ geofizicheskiĭ kom-t pri Prezidiume Akademii nauk SSSR, 1988.

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8

Cluster dayside polar cusp: Planning and coordination of measurements from cluster, ground stations, balloons, and rockets in the dayside polar-cusp region ... Norway, 16-19 September 1991 (ESA SP). ESTEC, 1991.

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9

C, Barron, ed. Cluster dayside polar cusp: Planning and coordination of measurements from cluster, ground stations, balloons, and rockets in the dayside polar-cusp region : proceedings of an international workshop, Longyearbyen, Norway, 16-19 September 1991. [Paris]: European Space Agency, 1991.

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10

(Editor), J. A. Holtet, and A. Egeland (Editor), eds. The Polar Cusp (NATO Science Series C: Mathematical and Physical Sciences, Volume 145). Springer, 1985.

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Book chapters on the topic "Polar cusps"

1

Gussenhoven, M. S., D. A. Hardy, and R. L. Carovillano. "Average Electron Precipitation in the Polar Cusps, Cleft and Cap." In The Polar Cusp, 85–97. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5295-9_6.

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2

Baumjohann, W., and E. Friis-Christensen. "Dayside High-Latitude Ionospheric Current Systems." In The Polar Cusp, 223–34. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5295-9_16.

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3

Lemaire, J. "Simulation of Solar Wind-Magnetosphere Interaction." In The Polar Cusp, 33–46. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5295-9_3.

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4

Sckopke, Norbert. "Plasma and Field Observations in the Exterior Cusp, Entry Layer, and Plasma Mantle." In The Polar Cusp, 1–7. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5295-9_1.

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5

Stamnes, K., M. H. Rees, B. A. Emery, and R. G. Roble. "Modelling of Cusp Auroras: The Relative Impact of Solar EUV Radiation and Soft Electron Precipitation." In The Polar Cusp, 137–47. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5295-9_10.

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6

Eather, R. H. "Polar Cusp Dynamics." In The Polar Cusp, 149–62. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5295-9_11.

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7

Sandholt, P. E., A. Egeland, J. A. Holtet, B. Lybekk, K. Svenes, and S. Åsheim. "Large — and Small — Scale Dynamics of the Polar Cusp Region." In The Polar Cusp, 163–75. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5295-9_12.

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8

Meng, C. I., and M. Candidi. "Polar Cusp Features Observed By DMSP Satellites." In The Polar Cusp, 177–92. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5295-9_13.

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9

McEwen, D. J. "Optical-Particle Characteristics of the Polar Cusp." In The Polar Cusp, 193–202. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5295-9_14.

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10

Potemra, T. A., and L. J. Zanetti. "Characteristics of Large-Scale Birkeland Currents in the Cusp and Polar Regions." In The Polar Cusp, 203–22. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5295-9_15.

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Conference papers on the topic "Polar cusps"

1

Blecki, J. "Can the Relativistic Maser Mechanism Cause the Strong Emissions Registered by Cluster and Demeter Satellites in the Polar Cusp? (abstract)." In Planetary Radio Emissions VII. Vienna: Austrian Academy of Sciences Press, 2011. http://dx.doi.org/10.1553/pre7s269.

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Reports on the topic "Polar cusps"

1

Egeland, Alv, and Joeran Moen. Combined Svalbard EISCAT Radar and Optical Observation for Polar Cusp/Cap Research. Fort Belvoir, VA: Defense Technical Information Center, October 2000. http://dx.doi.org/10.21236/ada388178.

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2

Crowley, Geoffrey, Bodo W. Reinisch, and David F. Kitrosser. Digisonde at Sondrestrom to Monitor the Ionospheric Polar Cap and Cusp Region. Fort Belvoir, VA: Defense Technical Information Center, January 1990. http://dx.doi.org/10.21236/ada230705.

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