Global Response of the Ionosphere to Atmospheric Tides Forced from Below: Recent Progress Based on Satellite Measurements
Global Response of the Ionosphere to Atmospheric Tides Forced from Below: Recent Progress Based on Satellite Measurements
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DOI：
10.1007/s11214-011-9837-1
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发表时间：
2011-10
影响因子：
10.3
通讯作者：
D. Pancheva;P. Mukhtarov
中科院分区：
文献类型：
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作者：
D. Pancheva;P. Mukhtarov
本文综述了电离层对自下而上强迫的大气潮汐响应的研究进展。根据现代卫星数据(COSMIC和TIMED)，考虑了大气温度潮汐及其电离层响应的全球空间结构和时间变化。用相同的数据分析方法提取了两个数据集的潮汐波。低热层温度潮汐及其电离层响应之间的相似性为确认大气-电离层耦合的新范式提供了证据。本文还提供了新的实验结果，解释了为什么WN4和部分WN3经度结构在电离层中如此显著。这些结果表明，WN4(WN3)结构并不像人们通常认为的那样，只是由DE3(DE2)潮汐产生的。DE3(DE2)潮汐仍然是主要贡献者，但SPW4和SE2(SPW3、DW4和SE1)波也有它们的影响，电离层响应几乎加倍(1.5倍强)。文中还给出了太阳同步24小时(DW1)、12小时(SW2)和8小时(TW3)电子密度振荡的全球分布和时间变率。结果表明，虽然电离层SW2响应的纬度和高度结构主要是由下方强迫的SW2潮汐迁移形成的，但DW1响应主要是由于光致电离的日变化。电离层TW3响应的特殊垂直结构显示了向下/向上的相序，需要进一步研究形成这一电离层响应的物理过程。
This paper provides an overview on the recent progress in studying the ionospheric response to atmospheric tides forced from below. The global spatial structure and temporal variability of the atmospheric temperature tides and their ionospheric responses are considered on the basis of modern satellite-board data (COSMIC and TIMED). The tidal waves from the two data sets have been extracted by one and the same data analysis method. The similarity between the lower thermospheric temperature tides and their ionospheric responses provides evidence for confirming the new paradigm of atmosphere-ionosphere coupling. This paper provides also new experimental results which give an explanation why the WN4 and partly WN3 longitude structures are so prominent pattern in the ionosphere. These results present evidence indicating that the WN4 (WN3) structure is not generated only by the DE3 (DE2) tide as it has been often assumed. The DE3 (DE2) tide remains the leading contributor, but the SPW4 and SE2 (SPW3, DW4 and SE1) waves have their effects as well in a way that the ionospheric response becomes almost double (1.5 time stronger). The paper presents also the global distribution and temporal variability of the sun-synchronous 24-h (DW1), 12-h (SW2) and 8-h (TW3) electron density oscillations. It has been shown that while the latitude and altitude structure of the ionospheric SW2 response is predominantly shaped by the migrating SW2 tide forced from below the DW1 response is mainly due to daily variability of the photo-ionization. The peculiar vertical structure of the ionospheric TW3 response, that shows downward/upward phase progression, calls for further study of the physical processes shaping this ionospheric response.