globalchange  > 气候减缓与适应
DOI: 10.1029/2017JA024974
Scopus记录号: 2-s2.0-85047637193
论文题名:
Combined Contribution of Solar Illumination, Solar Activity, and Convection to Ion Upflow Above the Polar Cap
作者: Ma Y.-Z.; Zhang Q.-H.; Xing Z.-Y.; Jayachandran P.T.; Moen J.; Heelis R.A.; Wang Y.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:5
起始页码: 4317
结束页码: 4328
语种: 英语
英文关键词: ion upflow ; ionospheric convection ; polar cap ; solar activity ; solar illumination
英文摘要: By analyzing a five-year period (2010–2014) of Defense Meteorological Satellite Program (DMSP) plasma data, we investigated ion upflow occurrence, speed, density, and flux above the polar cap in the northern hemisphere under different solar zenith angle (SZA), solar activity (F10.7), and convection speed. Higher upflow occurrence rates in the dawn sector are associated with regions of higher convection speed, while higher upflow flux in the dusk sector is associated with higher density. The upflow occurrence increases with convection speed and solar activity but decreases with SZA. Upflow occurrence is the lowest when the SZA > 100° and the convection speeds are low. While, the upflow velocity and flux show a clear seasonal dependence with higher speed in the winter and higher flux in the summer during low convection conditions. However, they are detected for the first time to be both higher in summer during high convection conditions. These results suggest that ion upflow in the polar cap is controlled by the combination of convection, solar activity, and solar illumination. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114010
Appears in Collections:气候减缓与适应

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作者单位: Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China; Physics Department, University of New Brunswick, Fredericton, NB, Canada; Department of Physics, University of Oslo, Oslo, Norway; William B. Hanson Center for Space Sciences, University of Texas at Dallas, Richardson, TX, United States

Recommended Citation:
Ma Y.-Z.,Zhang Q.-H.,Xing Z.-Y.,et al. Combined Contribution of Solar Illumination, Solar Activity, and Convection to Ion Upflow Above the Polar Cap[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(5)
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