Thu Apr 10, F. Flechtner
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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.
• from the NASA Astrophysics Data System • by the DOI System •
@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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