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Discussion papers
https://doi.org/10.5194/acp-2018-790
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2018-790
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 02 Oct 2018

Research article | 02 Oct 2018

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This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

The global climatology of the intensity of ionospheric sporadic E layer

Bingkun Yu1,2, Xianghui Xue1,2,3, Xin'an Yue4, and Xiankang Dou1,2 Bingkun Yu et al.
  • 1CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Sciences, University of Science and Technology of China, Hefei, China
  • 2Mengcheng National Geophysical Observatory, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China
  • 3Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, China
  • 4Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China

Abstract. On the basis of S4max data retrieved from COSMIC GPS radio occultation measurements, the long-term climatology of the intensity of Es layers is investigated for the period from December 2006 to January 2014. The global maps of Es intensity shows a high spatial resolution geographical distributions and strong seasonal dependence of Es layers. The maximum intensity of Es occurs in the midlatitudes, and its value in summer is 2–3 times larger than that in winter. A relatively strong Es layer is observed at the North and South Poles with a distinct boundary dividing the midddle latitudes and high latitudes along 60°–80° geomagnetic latitude bands. Besides, simulation results shows that the convergence of vertical ion velocity could partially explain the seasonal dependence of Es intensity. Furthermore, some disagreements between the distributions of calculated divergence of vertical ion velocity and observed Es intensity indicate that other processes such as magnetic field effects, meteoric mass influx into the earth's atmosphere and chemical processes of metallic ions should also be considered, which play an important role in the spatial and seasonal variations of Es layers.

Bingkun Yu et al.
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It reports the long-term climatology of the intensity of Es layers from COSMIC satellites. The global Es maps present high-resolution spatial distributions and seasonal dependence. It mainly occurs at midlatitudes and Polar Regions. Based on the windshear theory, simulation results indicate the convergence of vertical ion velocity could partially explain the Es seasonal dependence and some disagreements between observations and simulations suggest other processes play roles in the Es variations.
It reports the long-term climatology of the intensity of Es layers from COSMIC satellites. The...
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