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Characteristics of Pc5 activity at high latitudes stations in Antarctica

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Characteristics of Pc5 activity at high latitudes stations in Antarctica
Other Titles
남극 고위도 기지에서의 Pc5 파동 활동성
Kwan, Hyuckjin
Kim, Khan-Hyuk
Jee, Geonhwa
Jin, Ho
Kim, Hyomin
Shin, Jehyuck
Lee, Seungah
Kwon, Jong-Woo
Kim, Jeong-Han
Lee, Changsup
Lessard, Marc
Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
ULF Pc5 waves; Polar region; Variation of solar wind speed; Antarctic stations; Correlation analysis
Issue Date
Kwan, Hyuckjin, et al. 2019. "Characteristics of Pc5 activity at high latitudes stations in Antarctica". JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 193(1): 105087-7.
We examined wave activities in the Pc5 frequency band (~2-7 mHz) using the magnetic field data from five Antarctic stations, which are AGO3 (72.5° S Altitude-Adjusted Corrected Geomagnetic latitude), South Pole (SPA, 74.6° S), McMurdo (MCM) and Jang Bogo Station (JBS, 80° S), and Dome C (DMC, 89.1° S), during 2017. Pc5 waves at AGO3 and SPA show characteristics associated with Kelvin-Helmohltz instability on the magnetopause and substorm activities, under closed field lines conditions. The local time and seasonal dependence of Pc5 wave activities at polar cap stations (MCM, JBS, and DMC) are significantly different from those at AGO3 and SPA. These indicate that the generation mechanism of Pc5 activities in the open field line region at polar cap is different from that in the closed field lines. We suggest that polar-cap Pc5 is generated by ionospheric current variations produced by solar dynamo between solar wind plasma and geomagnetic field.
Appears in Collections  
2019-2019, Understanding polar upper atmospheric changes by energy inputs from the space environment and the lower atmosphere (19-19) / Jee, Geonhwa (PE19020)
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