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DATA ASSIMILATION FOR THE STUDY OF MAGNETOSPHERE-IONOSPHERE-ATMOSPHERE COUPLING

磁层-电离层-大气耦合研究的数据同化

基本信息

批准号：
PP/D002230/1
负责人：
Cathryn Mitchell
金额：
$ 21.05万
依托单位：
University of Bath
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2006
资助国家：
英国
起止时间：
2006 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=PP%2FD002230%2F1
关键词：
DATA ASSIMILATION STUDY MAGNETOSPHERE IONOSPHERE

项目摘要

State-of-the-art ionospheric imaging techniques use Global Positioning System (GPS) satellite data. In a similar manner to medical imaging, where the patient is examined by X-rays, in ionospheric imaging the upper atmosphere (ionosphere) is examined by radio waves. The next big step for ionospheric imaging is to combine it with models of the ionosphere. The reason to do this is to discover the underlying physics, which we cannot do very well by just looking at the images. We need to link the images to models of winds, solar radiation and electric fields in order to understand what causes the upper atmospheric environment to behave as it does during extreme events called storms. These are not the weather storms we are familiar with but rather these space-weather storms are caused by the bombardment of the outer realms of the atmosphere with particles and radiation from the Sun. The mathematics we need to link the measurements to the models is called data assimilation. Data assimilation has already been strikingly successful in meteorology. The data assimilation to be developed under this grant is for much higher up in the atmosphere (above 100 km) and will be used to investigate the coupling between the neutral and ionized atmosphere and to determine the relationships between ionosphere-atmosphere dynamics and magnetosphere dynamics.

最先进的电离层成像技术使用全球定位系统卫星数据。与医学成像类似，患者通过X射线进行检查，在电离层成像中，高层大气（电离层）通过无线电波进行检查。电离层成像的下一个重大步骤是将其与电离层模型联合收割机结合起来。这样做的原因是为了发现潜在的物理学，我们不能仅仅通过看图像来做得很好。我们需要将这些图像与风、太阳辐射和电场的模型联系起来，以了解是什么原因导致高层大气环境在称为风暴的极端事件中表现得如此。这些不是我们熟悉的天气风暴，而是这些空间天气风暴是由来自太阳的粒子和辐射对大气层外部的轰击造成的。我们需要将测量结果与模型联系起来的数学方法称为数据同化。数据同化在气象学中已经取得了惊人的成功。在这笔赠款下开发的数据同化技术将用于大气层更高的地方（100公里以上），并将用于研究中性和电离大气层之间的耦合，并确定电离层-大气层动态与磁层动态之间的关系。