Analysis of the Ionospheric Irregularity Events in the Low Latitude of East Asia Based on Multiple Instruments
-
摘要: 利用海南台站(19.5°N,109.1°E,dip:13.6°N)和磁赤道区的多种地基和天基观测数据,对2011年11月20日观测到的电离层不规则体事件进行了分析.海南台站VHF雷达、电离层闪烁和数字测高仪的综合观测结果表明,当天日落附近发生了强的电离层不规则体事件,主要表现为雷达羽和强闪烁的形态.结合磁赤道区GPS和C/NOFS卫星观测结果进行分析可知,海南台站日落附近出现的雷达羽和强闪烁与南海磁赤道区产生的主等离子体泡存在明显联系.Abstract: The ionospheric irregularity events observed on November 20, 2011 were analyzed using ground- and space-based instruments at Hainan station (19.5°N, 109.1°E, dip: 13.6°N) and magnetic equatorial region. The comprehensive observations of Hainan station VHF radar, ionospheric scintillation and digisonde show that strong ionospheric irregularities occurred near the sunset, and the irregularities pattern mainly appeared as radar plume and strong scintillation. Combined with the observations obtained by magnetic equatorial GPS and the C/NOFS satellite, the radar plume and strong scintillation over Hainan region near the sunset are obviously related to the primary plasma bubble generated in the magnetic equatorial region of the South China Sea.
-
[1] BURKE W J, DONATELLI D E, SAGALYN R C, et al. Low density regions observed at high altitudes and their connection with equatorial spread F[J]. Planet. Space Sci., 1979, 27:593 [2] HUANG C S, FOSTER J C, SAHAI Y. Significant depletions of the ionospheric plasma density at middle latitudes: a possible signature of equatorial spread F bubbles near the plasmapause[J]. J. Geophys. Res., 2007, A05315.DOI: 10.1029/2007JA012307 [3] KELLEY M C, MAKELA J J, PAXTON L J, et al. The first coordinated ground- and space-based optical observations of equatorial plasma bubbles[J]. Geophys. Res. Lett., 2003, 30(14):1766 [4] MAKELA J J, KELLEY M C. Field-aligned 777.4nm composite airglow images of equatorial plasma depletions[J]. Geophys. Res. Lett., 2003, 30(8):1442 [5] TSUNODA R T, NGUYEN T T, LE M H. Effects of tidal forcing, conductivity gradient, and active seeding on the climatology of equatorial spread F over Kwajalein[J]. J. Geophys. Res. Space Phys., 2015, 120:632-653 [6] WOODMAN R F, LAHOZ C. Radar observations of F region equatorial irregularities[J]. J. Geophys. Res., 1976, 81:5447-5466 [7] HYSELL D L, BURCHAM J D. JULIA radar studies of equatorial spread F[J]. J. Geophys. Res., 1998, 103: 29155-29167 [8] HYSELL D L. An overview and synthesis of plasma irregularities in equatorial spread F[J]. J. Atmos. Sol.-Terr. Phys., 2000, 62:1037-1056 [9] HYSELL D L, BURCHAM J D. Long term studies of equatorial spread F using the JULIA radar at Jicamarca[J]. J. Atmos. Sol.-Terr. Phys., 2002, 64:1531-1543 [10] TSUNODA R T. Upwelling: a unit of disturbance in equatorial spread F[J]. Progr. Earth Planet. Sci., 2015, 2(9).DOI: 10.1186/s40645-015-0038-5 [11] TSUNODA R T. Time evolution and dynamics of equatorial backscatter plumes: 1. Growth phase[J]. J. Geophys. Res., 1981, 86:139-149 [12] TSUNODA R T, WHITE B R. On the generation and growth of equatorial backscatter plumes, 1. Wave structure in the bottomside F layer[J]. J. Geophys. Res., 1981, 86:3610-3616 [13] TSUNODA R T, LIVINGSTON R C, HANSON W B. Equatorial plasma bubbles: Vertically elongated wedges from the bottomside F layer[J]. J. Geophys. Res., 1982, 87:9171-9180 [14] TSUNODA R T. On the generation and growth of equatorial backscatter plumes: 2. Scattering of the west walls of upwellings[J]. J. Geophys. Res., 1983, 88:4869-4874 [15] FUKAO S, OZAWA Y, YOKOYAMA T, et al. First observations of the spatial structure of F region 3-m-scale field-aligned irregularities with the Equatorial Atmosphere Radar[J]. J. Geophys. Res., 2004, 827, A02304. DOI: 10.1029/2003JA010096 [16] YOKOYAMA T, FUKAO S, YAMAMOTO M. Relationship of the onset of equatorial F-region irregularities with the sunset terminator observed with the Equatorial Atmosphere Radar[J]. Geophys. Res. Lett., 2004, 31, L24804.DOI: 10.1029/2004GL021529 [17] FUKAO S, YOKOYAMA T, TAYAMA T, et al. Eastward traverse of equatorial plasma plumes observed with the Equatorial Atmosphere Radar in Indonesia[J]. Ann. Geophys., 2006, 24:1411-1418 [18] PI X, MANNUCCI A J, LINDQWISTER U J, et al. Monitoring of global ionospheric irregularities using the worldwide GPS network[J]. Geophys. Res. Lett., 1997, 24(18):2283-2286 [19] NISHIOKA M, SAITO A, TSUGAWA T. Occurrence characteristics of plasma bubble derived from global ground-based GPS receiver networks[J]. J. Geophys. Res., 2008, 113, A05301.DOI: 10.1029/2007JA012605 [20] BUHARI S M, ABDULLAH M, YOKOYAMA T, et al. Climatology of successive equatorial plasma bubbles observed by GPS ROTI over Malaysia[J]. J. Geophys. Res. Space Phys., 2017, 122.DOI: 10.1002/2016JA023202 [21] HUANG C S. The characteristics and generation mechanism of small-amplitude and large-amplitude ESF irregularities observed by the C/NOFS satellite[J]. J. Geophys. Res. Space Phys., 2017, 122:8959-8973 [22] SHANG Sheping, SHI Jiankui, ZHEN Weimin, et al. Morphological study of L-band ionospheric scintillations in the equatorial region[J]. Chin. J. Radio Sci., 2006, 21(3):410-415 [23] SHI J K, WANG G J, REINISCH B W, et al. Relationship between strong range spread F and ionospheric scintillations observed in Hainan from 2003 to 2007[J]. J. Geophys. Res., 2011, 116, A08306.DOI: 10.1029/2011JA016806 [24] SHANG Sheping, SHI Jiankui, ZHANG Beichen, et al. Characteristics of ionospheric irregularities near Eastern Asia 110°E meridian based on GPS observations[J]. Chin. J. Radio Sci., 2014, 29(4):627-633.DOI: 10.13443/j.cjors.2013071502 [25] SHANG Sheping, SHI Jiankui, YAN Jingye, et al. Analysis of low latitude F region field-aligned irregularity events observed with Hainan VHF radar[J]. Chin. J. Space Sci., 2017, 37(6):702-709 [26] FEJER B G, SCHERLIESS L, DEPAULA E R. Effects of the vertical plasma drift velocity on the generation and evolution of equatorial spread F[J]. J. Geophys. Res., 1999, 104:19859-19869 [27] SU S Y, CHAO C K, LIU C H. On monthly/seasonal/longitudinal variations of equatorial irregularity occurrences and their relationship with the postsunset vertical drift velocities[J]. J. Geophys. Res., 2008, 113, A05307.DOI: 10.1029/2007JA012809 [28] KELLEY M C, LARSEN M F, LAHOZ C, et al. Gravity wave initiation of equatorial spread F: a case study[J]. J. Geophys. Res., 1981, 86:9087-9100
点击查看大图
计量
- 文章访问数: 1064
- HTML全文浏览量: 107
- PDF下载量: 458
- 被引次数: 0