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A new radar for integrated atmospheric science in the southern hemisphere.

用于南半球综合大气科学的新型雷达。

基本信息

批准号：
NE/G018707/1
负责人：
Mervyn Freeman
金额：
$ 71.56万
依托单位：
British Antarctic Survey
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2009
资助国家：
英国
起止时间：
2009 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FG018707%2F1
关键词：
new radar integrated atmospheric science

项目摘要

The Earth's atmosphere is a complex dynamical system involving interactions from local through regional to planetary scales and from the ground to its outer limits in Space. In particular, it is becoming increasingly apparent that the uppermost layers of the atmosphere (mesosphere, thermosphere, ionosphere, and magnetosphere/exosphere) may have significant influences on the lower atmosphere (stratosphere and troposphere). For example, work at BAS and Leicester University has shown influences on the lower atmosphere associated with solar heating above 100 km, geomagnetic activity arising from electrical currents in the ionosphere, and energetic particles from the magnetosphere. Such research is addressing the report of the Intergovernmental Panel on Climate Change (IPCC) which stated that the level of scientific understanding of the solar contribution is 'very low' and has significant uncertainties. Recognising the importance of the upper atmosphere, the U.K. Meteorological Office has recently raised the upper limit of its operational forecasting model from 37 to 63 km altitude with a consequent increase in forecasting skill and the next model due this year will have a ceiling at 80km. The Super Dual Auroral Radar Network (SuperDARN) is a powerful tool for measuring convection and waves in the mesosphere, thermosphere and ionosphere on local, regional and planetary scales. It has greatly advanced our understanding of the upper atmosphere and Space, and the U.K., despite a relatively small investment in SuperDARN, has dominated its exploitation. Initially, SuperDARN was concentrated at polar latitudes but recently it has begun to expand its coverage to lower temperate latitudes to form a sub-network known as StormDARN. This proposal highlights a time-limited opportunity to build a StormDARN radar on the Falkland Islands to address three specific challenges of integrated atmospheric science - the structure and influences of atmospheric gravity waves, atmospheric tides, and charge particle precipitation from the outer radiation belt.

地球大气层是一个复杂的动力系统，涉及从局部到区域到行星尺度以及从地面到外层空间极限的相互作用。特别是，越来越明显的是，大气的最上层（中间层、热层、电离层和磁层/散逸层）可能对低层大气（平流层和对流层）产生重大影响。例如，英国科学院和莱斯特大学的研究表明，100公里以上的太阳加热、电离层电流产生的地磁活动以及磁层产生的高能粒子对低层大气的影响。这样的研究是针对政府间气候变化专门委员会（IPCC）的报告，该报告指出，对太阳贡献的科学理解水平“非常低”，并且存在很大的不确定性。认识到上层大气的重要性，英国气象局最近将其业务预报模型的上限从37公里提高到63公里，从而提高了预报技能，预计今年的下一个模型的上限将达到80公里。超级双极光雷达网（superdual aurora Radar Network, SuperDARN）是一个强大的工具，用于测量局地、区域和行星尺度上的中间层、热层和电离层的对流和波。它极大地促进了我们对高层大气和太空的了解，而英国尽管在superdamn上的投资相对较少，但却主导了它的开发。最初，superdamn主要集中在极地纬度地区，但最近它开始将其覆盖范围扩大到较低温带地区，形成了一个名为stormdamn的子网络。该提案强调了在福克兰群岛建立一个stormdam雷达的有限时间机会，以解决综合大气科学的三个具体挑战——大气重力波的结构和影响、大气潮汐和来自外部辐射带的电荷粒子降水。