TY - JOUR

T1 - Auroral Ionosphere Model with PC Index as An Input

AU - Николаева, Вера

AU - Гордеев, Евгений Иванович

AU - Николаев, Александр

AU - Рогов, Денис

AU - Трошичев, Олег

N1 - Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2022/3

Y1 - 2022/3

N2 - Auroral Ionosphere Model (AIM-E) is designed to calculate chemical content in the high-latitude E region ionosphere and takes into account both the solar EUV radiation and the electron precipitation of magnetospheric origin. The latter is extremely important for auroral ionosphere chemistry especially in disturbed conditions. In order to maximize the AIM-E timing ac-curacy when simulating highly variable periods in the course of geomagnetic storms and sub-storms, we suggest to parameterize the OVATION-Prime empirical precipitation model with the ground-based Polar Cap (PC) index. This gives an advantage to: (1) perform ionospheric simulation with actual input, since PC index reflects the geoeffective solar wind conditions; (2) promptly assess the current geomagnetic situation, since PC index is available in real-time with 1 min resolution. The simulation results of AIM-E with OVATION-Prime (PC) demonstrate a good agreement with the ground-based incoherent scatter radar data (EISCAT UHF, Tromso) and with the vertical sounding data in the Arctic zone during events of intense particle precipitation. The model re-produces well the electron content calculated in vertical column (90–140 km) and critical frequency of sporadic E layer (fOEs) formed by precipitating electrons. The AIM-E (PC) model can be applied to monitor the sporadic E layer in real-time and in the entire high-latitude ionosphere, including the auroral and subauroral zones, which is important for predicting the conditions of radio wave propagation.

AB - Auroral Ionosphere Model (AIM-E) is designed to calculate chemical content in the high-latitude E region ionosphere and takes into account both the solar EUV radiation and the electron precipitation of magnetospheric origin. The latter is extremely important for auroral ionosphere chemistry especially in disturbed conditions. In order to maximize the AIM-E timing ac-curacy when simulating highly variable periods in the course of geomagnetic storms and sub-storms, we suggest to parameterize the OVATION-Prime empirical precipitation model with the ground-based Polar Cap (PC) index. This gives an advantage to: (1) perform ionospheric simulation with actual input, since PC index reflects the geoeffective solar wind conditions; (2) promptly assess the current geomagnetic situation, since PC index is available in real-time with 1 min resolution. The simulation results of AIM-E with OVATION-Prime (PC) demonstrate a good agreement with the ground-based incoherent scatter radar data (EISCAT UHF, Tromso) and with the vertical sounding data in the Arctic zone during events of intense particle precipitation. The model re-produces well the electron content calculated in vertical column (90–140 km) and critical frequency of sporadic E layer (fOEs) formed by precipitating electrons. The AIM-E (PC) model can be applied to monitor the sporadic E layer in real-time and in the entire high-latitude ionosphere, including the auroral and subauroral zones, which is important for predicting the conditions of radio wave propagation.

KW - Auroral oval

KW - E region of ionosphere

KW - Electron concentration

KW - Electron precipitation

KW - Numerical modeling

KW - PC index

KW - Substorm

KW - electron concentration

KW - ENERGY

KW - FIELD

KW - SPORADIC-E

KW - LAYERS

KW - substorm

KW - E-REGION

KW - auroral oval

KW - electron precipitation

KW - numerical modeling

UR - http://www.scopus.com/inward/record.url?scp=85125636836&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/3b0b49fe-f0d4-3ac4-aa51-b73e2f481058/

U2 - 10.3390/atmos13030402

DO - 10.3390/atmos13030402

M3 - Article

VL - 13

JO - ATMOSPHERE

JF - ATMOSPHERE

SN - 2073-4433

IS - 3

M1 - 402

ER -