Publications related to the GRACE Missions (no abstracts)

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Nightside Neutral Density Disturbances Collocated With Equatorial Plasma Irregularities Above 450 km: GRACE and GRACE-FO Observations in 2002–2022

Song, Hosub, Park, Jaeheung, Xiong, Chao, IJssel, Jose van den, Lee, Daehee, Lee, Jaejin, and Yi, Yu, 2024. Nightside Neutral Density Disturbances Collocated With Equatorial Plasma Irregularities Above 450 km: GRACE and GRACE-FO Observations in 2002–2022. Space Weather, 22(12):2023SW003851, doi:10.1029/2023SW003851.

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@ARTICLE{2024SpWea..2203851S,
       author = {{Song}, Hosub and {Park}, Jaeheung and {Xiong}, Chao and {IJssel}, Jose van den and {Lee}, Daehee and {Lee}, Jaejin and {Yi}, Yu},
        title = "{Nightside Neutral Density Disturbances Collocated With Equatorial Plasma Irregularities Above 450 km: GRACE and GRACE-FO Observations in 2002{\textendash}2022}",
      journal = {Space Weather},
     keywords = {neutral density disturbances, equatorial plasma irregularities, GRACE/GRACE-FO, advection, electron density, neutral scale heights},
         year = 2024,
        month = dec,
       volume = {22},
       number = {12},
        pages = {2023SW003851},
     abstract = "{We investigate the climatology of Neutral Density Disturbances (NDDs)
        collocated with Equatorial Plasma Irregularities (EPIs) at
        altitudes above 450 km by using 20 years of data from the
        Gravity Recovery and Climate Experiment (GRACE) and GRACE-FO
        satellites. Electron density data are used to detect EPIs, and
        thermospheric neutral density measured onboard the same
        spacecraft serves to identify EPI-related NDDs. A detailed
        analysis focused on the morphological similarity between
        electron and neutral densities. To examine the relationship
        between EPI and NDD, statistical dependences of EPIs and NDDs on
        season/longitude (S/L), Magnetic Latitude (MLAT), Magnetic Local
        Time (MLT), and solar activity have been checked. As a first
        step, we confirmed that the EPI climatology in GRACE satellite
        data is consistent with previous reports. Then, it is found that
        the lower the neutral density in the background upper
        thermosphere, the higher the probability that EPI can accompany
        NDDs. We suggest that the vertical plasma advection surrounding
        EPI can result in neutral density disturbance, of which the
        efficiency depends on the background neutral scale height or
        temperature. The colder the thermosphere, the shorter its
        vertical scale height (or the lower the background neutral
        density), which can make the plasma advection leave measurable
        imprints on the neutral density.}",
          doi = {10.1029/2023SW003851},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2024SpWea..2203851S},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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