The Changing Polar Ionosphere: A Comparative Climatology of Solar Cycles 23 and 24

变化的极地电离层：太阳活动周期 23 和 24 的比较气候学

基本信息

批准号：
NE/K011766/1
负责人：
Timothy Yeoman
金额：
$ 49.02万
依托单位：
University of Leicester
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2014
资助国家：
英国
起止时间：
2014 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FK011766%2F1
关键词：
Changing Polar Ionosphere Comparative Climatology

项目摘要

The polar ionosphere has a range of effects on technological systems produced by the coupling of the solar wind with the magnetosphere, and the resulting electrodynamic interaction between magnetosphere, ionosphere and atmosphere. These effects include the degradation of trans-ionospheric satellite communications and point-to-point radio communications, clutter effects in over-the-horizon radars, and increased levels (and decreased predictability) of satellite drag.Such effects are known to be strongly influenced by the activity level of the sun, and hence the phase of the 11-year solar activity cycle. Recent changes in solar activity have taken the scientific community by surprise, in that the recent solar minimum was both extended in time, and much lower in activity than predicted. As we now approach solar maximum we see an increasing solar activity, but this rise in activity is also less than expected.We propose an extensive statistical investigation of the profound changes imposed on a number of fundamental ionospheric characteristics by the changing solar cycle, focussing on the inter-cycle differences between solar cycle 23, a "standard" solar cycle, and the most recent, unusual solar cycle 24. Furthermore, we will extend this analysis of solar cycle dependence and inter-cycle differences to a number of ionospheric and atmospheric characteristics which have a direct effect on the operational characteristics of key technologies such as trans-ionospheric communication, satellite navigation and radar systems. This major step forward in defining and understanding these effects and their dependence on the level of solar activity will allow a prediction of their consequences for the polar ionosphere and atmosphere, and for the technological systems we operate in the polar regions.

极性电离层对太阳风与磁层的耦合以及磁层，电离层和大气之间产生的电动力相互作用产生的技术系统具有一系列影响。这些影响包括跨欧洲卫星通信的降解和点对点无线电通信，在野马雷达上的混乱效应，以及卫星阻力的水平提高（以及可预测性）的水平（以及降低的可预测性）。已知效果受到太阳活动水平的强烈影响，从而受到11年太阳能活性周期的阶段。太阳能活动的最新变化使科学界感到惊讶，因为最近的太阳能最低限度均延长，活动的时间比预期的要低得多。当我们现在接近太阳能时，我们看到的太阳活动越来越大，但是这种活动的升高也少于预期。我们提出了对许多基本的电离层特征所引起的深刻变化的统计研究，这是通过变化的太阳能周期，重点关注的是循环差异23之间的“标准循环”，以及最新的Solar周期，并扩展了Solar solar and solar solar 24。与许多电离层和大气特征的周期间差异，这些特征对关键技术的运行特征有直接影响，例如跨际通信，卫星导航和雷达系统。在定义和理解这些效果及其对太阳活动水平的依赖方面，这一主要一步将允许预测它们对极性电离层和大气的后果，以及我们在极地地区运行的技术系统。