研究發現於南半球夏天的晚上威德海地區電離層電子濃度會比白天時的濃度還高，此稱之為威德海異常(Weddell Sea Anomaly; WSA)。本論文研究台俄衛星(Experimental Scientific Education Micro-Satellite/Tatyana-2, ESEMS/T-2)電漿電子溫度計 (Electron Temperature Probe, ETP) 酬載資料，發現2009年12月至2010年1月，南半球夏季上午1000LT威德海地區電離層電子溫度會異常高溫。相互比對台俄衛星、法國DEMETER衛星、福爾摩沙衛星3號觀測，證實夜間電子濃度異常增大而其白天電子溫度異常高溫之存在。比較觀測與水平風場模式(Horizontal Wind Model, HWM93)模擬結果，說明威德海電離層異常與熱氣層子午風經度之日變化有關。

Previous studies show that the ionospheric density is grater in the summer nighttime than daytime around the Weddell Sea region, which is named Weddell Sea Anomaly (WSA). In this research, measurement of an electron temperature probe (ETP) onboard the Experimental Scientific Education Micro-Satellite/Tatyana-2 (ESEMS/T-2) at 1000LT and 2200LT during December 2009-January 2010 are analyzed. ESEMS/T-2 observes anomalous enhancements in the ionosphere electron temperature, while DEMETER probes anomalous electron temperature enhancements and electron density reductions concurrently. Cross-comparisons between observations among ESEMS/T-2, DEMETER, and FORMOSAT-3/COSMIC that confirms existences of the nighttime electron density and daytime electron temperature anomalies over the Weddell Sea region. A further investigation on the observations and simulations of the horizontal wind model HWM93 shows that the northward meridional wind along the Earth’s magnetic field is essential to form the electron density enhancement in the Weddell Sea latitude.

Buckley, R., A theory of resonance rectification, The response of a Spherical plasma probe to alternation potentials, Proc.Royal Soc., 290, pp. 186-219, London, 1966.
Bilitza, D. (1975), Models for the relationship between electron density and temperature in the upper ionosphere, J. Atmos. Terr. Phys., 37, 1219–1222, doi:10.1016/0021-9169(75)90193-2.
Bellchambers, W. H., and W. R. Piggott (1958), Ionospheric measurements made at Halley Bay, Nature, 182, 1596–1597, doi:10.1038/1821596a0.
Brace, L. H., and R. F. Theis (1978), An empirical model of the interrelationship of electron temperature and density in the daytime thermosphere at solar minimum, Geophys. Res. Lett., 5, 275–278, doi:10.1029/GL005i004p00275.
Bilitza, D., and W. R. Hoegy (1990), Solar activity variation of ionospheric plasma temperatures, Adv. Space Res., 10, 81–90, doi:10.1016/0273-1177(90)90190-B.
Burns, A. G., Z. Zeng, W. Wang, J. Lei, S. C. Solomon, A. D. Richmond, T. L. Killen, and Y.-H. Kuo (2008), The behavior of the F2 peak ionosphere over the South Pacific at dusk during quiet summer condition from COSMIC data, J. Geophys Res., 113,A12305, doi:10.1029/2008JA013308.
Davies, K., Ionospheric Radio, Short Run Press Ltd., England, 1990.
Fejer, B. G. (1991), Low latitude electrodynamic plasma drifts: A review,
J. Atmos. Terr. Phys., 53, 677–693, doi:10.1016/0021-9169(91)90121-M.
Horvath, I., (2006), A total electron content space weather study of the nighttime Weddell Sea Anomaly of 1996/1997 southern summer with TOPEX/Poseidon radar altimetry, J. Geophys. Res., 111, A12317, doi:10.1029/2006JA011679.
Horvath, I., E. A. Essex (2003), The Weddell sea anomaly observed with the Topex satellite data, Journal of Atmospheric and Solar-Terrestrial Physics, VOL. 65, 693–706, 2003.
Kelly, M. C., R. A. Heelis, The Earth’s Ionosphere Plasma Physics and Electrodynamics, Academic Press, San Diego, 1989.
Kakinami, Y., C. H. Lin, J. Y. Liu, M. Kamogawa, S. Watanabe, and M. Parrot, Daytime longitudinal structures of electron density and temperature in the topside ionosphere observed by the Hinotori and DEMETER satellites, Journal of Geophysical Research, doi:10.1029/ 2010JA015632, in press. 2011. (SCI)
Liu, H., C. Stolle, M. Förster, and S. Watanabe (2007), Solar activity dependence of the electron density in the equatorial anomaly regions observed by CHAMP, J. Geophys. Res., 112, A11311, doi:10.1029/2007JA012616.
Lin C. H., J. Y. Liu, C. Z. Cheng, C. H. Chen, C. H. Liu, W. Wang, A. G. Burns, and J. Lei, Three-dimensional ionospheric electron density structure of the Weddell Sea Anomaly, JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 114, A02312, doi:10.1029/2008JA013455, 2009.
Lebreton J. -P., S. Stverak, P. Travnicek, M. Maksimovic, D. Klinge, S. Merikallio, D.
Lagoutte, B. Poirier, P.-L. Blelly, Z. Kozacek, M. Salaquarda, The ISL Langmuir probe experiment processing onboard DEMETER:Scientific objectives, description and first results, Planetary and Space Science, VOL. 54, 472–486, 2006.
Oyama, K. -I., T. Abe, K. Schlegel, A. Nagy, J. Kim, and K. Marubashi, Electron temperature probe onboard Japan’s Mars orbiter, Earth Planets Space, VOL. 51, 1309–1317, 1999.
Oyama, K. -I. ,Yoshihiro Kakinami, Jann-Yenq Liu, Masashi Kamogawa, and Tetsuya Kodama, Reduction of electron temperature in low-latitude ionosphere at 600 km before and after large earthquakes, JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 113, A11317, doi:10.1029/2008JA013367, 2008.
陳界宏，「台灣地區全磁場時空變化之研究(1989-2004 年)」，國立中央大學，博士論文，民國94年。
劉智旻，「地震期間電離層電子溫度變化之研究」，國立中央大學，碩士論文，民國97年。
楊智源，「利用福爾摩沙衛星三號與電離層探測儀觀測磁赤道電離層」，國立中央大學，碩士論文，民國98年。
蔡和展，「赤道地區電噴流與福衛三號衛星觀測電離層閃爍現象之相關性」，國立中央大學，碩士論文，民國98年。