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  • Hui Wang, ChengZhi Wang, YunFang Zhong. 2024: Effect of Interplanetary Magnetic Field Bx on Polar Electrojet as Observed by CHAMP and Swarm satellites. Earth and Planetary Physics. DOI: 10.26464/epp2024018
    Citation: Hui Wang, ChengZhi Wang, YunFang Zhong. 2024: Effect of Interplanetary Magnetic Field Bx on Polar Electrojet as Observed by CHAMP and Swarm satellites. Earth and Planetary Physics. DOI: 10.26464/epp2024018
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Effect of Interplanetary Magnetic Field Bx on Polar Electrojet as Observed by CHAMP and Swarm satellites

  • This study investigates the influence of IMF Bx on the peak current density and location of polar electrojet (PEJ), based on 16 years of magnetic field observations from CHAMP and Swarm satellites. The IMF Bx effect on PEJ displays obvious local time, seasonal and hemispherical differences. At dawn and dusk, the effect of IMF Bx on the PEJ appears less pronounced compared to other local times. Specifically, when IMF Bx <0 (IMF Bx >0), it tends to amplify the westward PEJ in the midnight sectors of the Northern Hemisphere (Southern Hemisphere), which is relatively stronger in the local winter hemisphere. At noontime, IMF Bx <0 (IMF Bx >0) intensifies the eastward current, while reduces the westward current in the Northern (Southern) Hemisphere. This effect is notably more prominent in the local summer hemisphere. Moreover, when IMF Bx <0 (IMF Bx >0) in the Northern Hemisphere (Southern Hemisphere), the eastward current around noontime shifts towards higher latitudes, while the westward current around midnight migrates towards lower latitudes.
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