Volume 40 Issue 6
Nov.  2020
Turn off MathJax
Article Contents
WANG Ling, YIN Fan. Distinguish Small-scale Traveling Ionospheric Disturbances and Equatorial Plasma Bubbles by Clustering Algorithm[J]. Journal of Space Science, 2020, 40(6): 1014-1023. doi: 10.11728/cjss2020.06.1014
Citation: WANG Ling, YIN Fan. Distinguish Small-scale Traveling Ionospheric Disturbances and Equatorial Plasma Bubbles by Clustering Algorithm[J]. Journal of Space Science, 2020, 40(6): 1014-1023. doi: 10.11728/cjss2020.06.1014

Distinguish Small-scale Traveling Ionospheric Disturbances and Equatorial Plasma Bubbles by Clustering Algorithm

doi: 10.11728/cjss2020.06.1014
  • Received Date: 2020-01-13
  • Rev Recd Date: 2020-04-17
  • Publish Date: 2020-11-15
  • By analyzing the 50Hz high-frequency magnetic field data by Swarm from January 2015 to December 2019, according to the magnetic disturbances above the threshold in the perpendicular direction to the main field, Small-Scale Traveling Ionospheric Disturbances (SSTID) within ±45°N magnetic latitude have been detected. When detecting SSTID, Equatorial Plasma Bubbles (EPB) can be excluded by determining whether there is magnetic disturbance above the threshold in the direction which is parallel to the mean ambient field. However, when the disturbance is weak, the algorithm cannot completely exclude it. According to the different density distribution of SSTID and EPB in parameter space, the EPB can be distinguished by a density-based clustering algorithm. The results demonstrate that the clustering algorithm is very effective on separating EPB and SSTID in different two-dimensional parameter spaces and brings out a clear boundary between the high density region and low density region. The EPB identified by the clustering algorithm shows the strong dependence on solar activity and their statistical features are consistent with the previous study.

     

  • loading
  • [1]
    YIN F, LUHR H, PARK J, et al. Comprehensive analysis of the magnetic signatures of small-scale traveling ionospheric disturbances, as observed by Swarm[J]. J. Geophys. Res: Space Phys., 2019, 124(12):10794-10815.DOI: 10.1029/2019JA027523
    [2]
    MARTINIS C, BAUMGARDNER J, WROTEN J, et al. Seasonal dependence of MSTIDs obtained from 630.0nm airglow imaging at Arecibo[J]. Geophys. Res. Lett., 2010, 37(11):1-5.DOI: 10.1029/2010GL043569
    [3]
    YOKOYAMA T, HYSELL D L, OTSUKA Y, et al. Three-Dimensional simulation of the coupled Perkins and Es-Layer instabilities in the nighttime midlatitude ionosphere[J]. J. Geophys. Res.: Space Phys., 2009, 114(A3): 1-16.DOI: 10.1029/2008JA013789
    [4]
    BEHNKE R. F layer height bands in the nocturnal ionosphere over Arecibo[J]. J. Geophys. Res.: Space Phys., 1979, 84(A3):974-978
    [5]
    COSGROVE R B, TSUNODA R T. Instability of the E-F coupled nighttime midlatitude ionosphere[J]. J. Geophys. Res.: Space Phys., 2004, 109(A4):1-7.DOI: 10.1029/2003JA010243
    [6]
    TSUNODA, ROLAND T. On the coupling of layer instabilities in the nighttime midlatitude ionosphere[J]. J. Geophys. Res.: Space Phys., 2006, 111(A11):1-14.DOI: 10.1029/2006JA011630
    [7]
    PARK J, LUHR H, STOLLE C, et al. Statistical survey of nighttime midlatitude magnetic fluctuations: their source location and Poynting flux as derived from the Swarm constellation[J]. J. Geophys. Res.: Space Phys., 2016, 121(11):11235-11248. DOI: 10.1002/2016JA023408
    [8]
    PARK J, LUHR H, STOLLE C, et al. Magnetic signatures of medium-scale traveling ionospheric disturbances as observed by CHAMP[J]. J. Geophys. Res.: Space Phys., 2009, 114(A3):1-13. DOI: 10.1029/2008JA013792
    [9]
    PARK J, LUHR H, KERVALISHVILI G, et al. Nighttime magnetic field fluctuations in the topside ionosphere at midlatitudes and their relation to medium-scale traveling ionospheric disturbances: the spatial structure and scale sizes[J]. J. Geophys. Res.: Space Phys., 2015, 120 (8):6818-6830.DOI: 10.1002/2015JA021315
    [10]
    KELLY M. The Earth's Ionosphere: Plasma Physics And Electrodynamics[M]. 2nd. Boston: Academic Press, 2009
    [11]
    WOODMAN R F. Spread F-an old equatorial aeronomy problem finally resolved[J]. Ann. Geophys., 2009, 27(5):1915-1934
    [12]
    KELLEY M C, MAKELA J J, LA BEAUJARDIERE O D, et al. Convective ionospheric storms: a review[J]. Rev. Geophys., 2011, 49(2):1-26. DOI: 10.1029/2010RG000340
    [13]
    LUHR H, ROTHER M, MAUS S, et al. The diamagnetic effect of the equatorial Appleton anomaly: its characteristics and impact on geomagnetic field modeling[J]. Geophys. Res. Lett., 2003, 30(17):1-4.DOI: 10.1029/2003GL017407
    [14]
    PARK J, LUHR H, STOLLE C, et al. The characteristics of field-aligned currents associated with equatorial plasma bubbles as observed by the CHAMP satellite[J]. Ann. Geophys., 2009, 27:2685-2697
    [15]
    XIONG C, LUHR H, MA S Y, et al. Features of highly structured equatorial plasma irregularities deduced from CHAMP observations[J]. Ann. Geophys., 2012, 30(8): 1259-1269
    [16]
    STOLLE C, LUHR H, ROTHER M, et al. Magnetic signatures of equatorial spread F as observed by the CHAMP satellite[J]. J. Geophys. Res.: Space Phys., 2006, 111(A2):1-13. DOI: 10.1029/2005JA011184
    [17]
    LUHR H, XIONG C, PARK J, et al. Systematic study of intermediate-scale structures of equatorial plasma irregularities in the ionosphere based on CHAMP observations[J]. Front. Phys., 2014, 2:15
    [18]
    YOKOYAMA T, STOLLE C. Low and midlatitude ionospheric plasma density irregularities and their effects on geomagnetic field[J]. Space Sci. Rev., 2017, 206(1):495-519
    [19]
    ESTER M, KRIEGEL H, SANDER J, et al. A density-based algorithm for discovering clusters in large spatial Databases with Noise[C]//Proceeding of 2nd International Conference on Knowledge Discovery and Data Mining. Portland: AIAA Press, 1996:226-231
    [20]
    PARK J, STOLLE C, LUHR H, et al. Magnetic signatures and conjugate features of low-latitude plasma blobs as observed by the CHAMP satellite[J]. J. Geophys. Res.: Space Phys., 2008, 113(A9):1-10.DOI: 10.1029/2008JA013211
    [21]
    WANG Cheng, LIU Yafeng, WANG Xincheng, et al. Appraisal identification of classifier's performance[J]. Electron. Design Eng., 2011, 19(8):13-15, 21(王成, 刘亚峰, 王新成, 等. 分类器的分类性能评价指标[J]. 电子设计工程, 2011, 19(8):13-15, 21)
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article Views(279) PDF Downloads(71) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return