Understanding Strong Neutral Vertical Winds and Ionospheric Responses to the 2015 St. Patrick's Day Storm Using TIEGCM Driven by Data‐Assimilated Aurora and Electric Fields

Lu, Xian; Wu, Haonan; Kaeppler, S. R.; Meriwether, J. W.; Nishimura, Y.; Wang, Wenbin; Li, Jintai; Shi, Xueling

doi:10.1029/2022sw003308

Cited by 3 publications

(2 citation statements)

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“…X. Lu et al. (2021) assimilate ground‐based and space‐borne data to provide multi‐scale two‐dimensional electric field and particle precipitation patterns for the TIEGCM simulation of an intense geomagnetic storm. They discover strong vertical neutral winds when both the electric field and the particle precipitation are enhanced.…”

Section: Introductionmentioning

confidence: 99%

Energy Deposition by Mesoscale High‐Latitude Electric Fields Into the Thermosphere During the 26 October 2019 Geomagnetic Storm

et al. 2022

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The high-latitude electric field is a crucial driver of the ionospheric and thermospheric system and provides a primary energy source for the thermosphere in the form of Joule heating (Kaeppler et al., 2022;G. Lu et al., 2016). The high-latitude electric field changes spatially and temporally on a variety of scales (Codrescu et al., 2000;Cousins & Shepherd, 2012;Crowley & Hackert, 2001;Matsuo et al., 2003). Such variability of the electric field, especially the small-scale and mesoscale variability that has long been absent in empirical models of the high-latitude electric field, can significantly impact the thermospheric Joule heating, neutral density, and neutral temperature (

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Section: Introductionmentioning

confidence: 99%

Energy Deposition by Mesoscale High‐Latitude Electric Fields Into the Thermosphere During the 26 October 2019 Geomagnetic Storm

et al. 2022

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“…found that the Global Ionosphere Thermosphere Model (GITM) driven by the THEMIS/ASI auroral observations better resolves the magnitude of TIDs (doubled) than that by empirical auroral inputs. Figure2shows a recent effort of comparing the TIEGCM runs with and without assimilated magnetospheric drivers (aurora and electric fields) during the 2015 St Patrick's Day storm(Lu et al, 2022). Data assimilation uses SuperDARN and PFISR ion drifts for electric fields, and SSUSI and THEMIS/ASIs data for aurora.…”

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confidence: 99%

Observing Multi-Scale Ionospheric Structures and Modeling I-T Responses

Lu,

Nishimura,

Wang

et al. 2023

Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers)

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During geomagnetic storms and substorms, a vast amount of magnetospheric energy is deposited into the ionosphere-thermosphere (I-T) system via the convergence of Poynting flux and energetic particle precipitation. This energy deposition leads to significant heating at high latitudes, changes in global circulation, and disturbs neutral and plasma densities. The changes in the I-T system have a significant impact on the near-Earth space environment such as satellite drag, orbiting, and communication. Largescale storm-time responses have been well studied using I-T models driven by statistical maps of aurora and electric potential, while mesoscale and small-scale processes and cross-scale interaction were much less understood. This is partially attributed to the lack of sufficient multi-scale ionospheric observations that can be used to constrain models. To improve the accuracy of space weather modeling for the I-T system, we need continuous observations of high-latitude forcing (e.g., particle precipitation and electric fields) with sufficient resolution that can separate temporal and spatial structures/variabilities, as well as simultaneous observations of I-T responses such as neutral winds, neutral/plasma temperatures and densities. Such multi-parameter and multi-scale observations will allow one to monitor different scales of forcing and consequences at the same time so as to understand the global, multi-scale dynamics of the I-T system and its responses to external driving conditions, as well as constrain I-T models to improve space weather predictability. This white paper addresses the current challenges for a more realistic space weather simulation and solicits observational and modeling requirements.

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Ionosphere variability I: Advances in observational, monitoring and detection capabilities

Tsagouri

Belehaki

Themens

et al. 2023

Advances in Space Research

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Understanding Strong Neutral Vertical Winds and Ionospheric Responses to the 2015 St. Patrick's Day Storm Using TIEGCM Driven by Data‐Assimilated Aurora and Electric Fields

Cited by 3 publications

References 44 publications

Energy Deposition by Mesoscale High‐Latitude Electric Fields Into the Thermosphere During the 26 October 2019 Geomagnetic Storm

Energy Deposition by Mesoscale High‐Latitude Electric Fields Into the Thermosphere During the 26 October 2019 Geomagnetic Storm

Observing Multi-Scale Ionospheric Structures and Modeling I-T Responses

Ionosphere variability I: Advances in observational, monitoring and detection capabilities

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