权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Global Coordination of Atmospheric Electricity Measurements (GloCAEM)

全球大气电测量协调 (GloCAEM)

基本信息

批准号：
NE/N013689/1
负责人：
Keri Nicoll
金额：
$ 3.98万
依托单位：
University of Reading
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2016
资助国家：
英国
起止时间：
2016 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FN013689%2F1
关键词：
Global Coordination Atmospheric Electricity Measurements

项目摘要

It is well established that Earth has a "Global atmospheric Electric Circuit" (GEC), through which charge separation in thunderstorms sustains large scale current flow around the planet. The GEC generates an atmospheric electric field which is present globally, and is typically 100V/m near the surface in fair weather conditions. Measurements of electric field have been shown to include information about global thunderstorm activity, local aerosol concentrations and cloud cover, as well as changes in the space weather environment. Recent work has also suggested that atmospheric electrical changes may be effective as earthquake precursors, as well as being sensitive to release of radioactivity, as evidenced by the Fukushima disaster in 2011. A current NERC Independent Research Fellowship entitled "Understanding energetic particle effects on atmospheric processes" also investigates a mechanism by which vertical current flow in the GEC can affect layer cloud microphysics, thereby providing a route by which space weather changes can alter tropospheric weather processes through atmospheric electricity. The global nature of the GEC means that in order that truly global signals are considered in understanding the processes within the circuit, many validating measurements must be made at different locations around the world. To date, no genuinely global network of FW atmospheric electricity measurements has ever existed, therefore, given the growing number of groups now involved in atmospheric electricity monitoring, such a proposal is timely. This project will bring these experts together to make the first steps towards an effective global network for FW atmospheric electricity monitoring. A specific objective of the project will be to establish the first modern archive of international FW atmospheric electric field data in close to real time to allow global studies of atmospheric electricity to be straightforwardly and robustly performed.Direct communication between network members will be facilitated by two workshops, hosted by the University of Reading towards the beginning and end of the project. The first of these will facilitate discussion of measurement practises and instrumentation, as well as establish recording and archiving procedures to archive electric field data in a standardised, easily accessible format. CEDA-BADC have agreed to support the creation of a data repository and a data manager, employed by the University of Reading, who will be responsible for liasing between CEDA-BADC and the project partners to upload data. In terms of scientific objectives, the PI will lead an investigation of space weather influences on the electric field measurements stored in the data repository. Evidence for influence from events such as solar flares, coronal mass ejections, and heliospheric current sheet crossings during the past three solar cycles will be examined using statistical techniques including super epoch analysis. During the second workshop, an outline for a peer reviewed publication describing the details of the network and data repository, as well as initial scientific findings will also be produced. This will form the basis for a joint publication from all the project partners and will help to advertise the network to the wider scientific community.

众所周知，地球有一个“全球大气电路”（GEC），通过它，雷暴中的电荷分离维持了地球周围的大规模电流。GEC产生的大气电场在全球范围内普遍存在，在晴朗的天气条件下，在地表附近通常为100 V/m。对电场的测量已显示出包括关于全球雷暴活动、当地气溶胶浓度和云量以及空间天气环境变化的信息。最近的工作还表明，大气电变化可能是有效的地震前兆，以及对放射性释放的敏感性，如2011年福岛灾难所证明的。目前，核能研究中心的一项题为“了解高能粒子对大气过程的影响”的独立研究金也研究了地球环流中的垂直电流可影响云层微物理学的机制，从而提供了一条途径，使空间天气变化可通过大气电改变对流层天气过程。GEC的全球性质意味着，为了在理解电路内的过程时考虑真正的全球信号，必须在世界各地的不同位置进行许多验证测量。迄今为止，还没有真正的全球FW大气电测量网络，因此，鉴于现在参与大气电监测的团体越来越多，这样的建议是及时的。该项目将把这些专家聚集在一起，为建立一个有效的全球FW大气电监测网络迈出第一步。该项目的一个具体目标将是建立第一个接近真实的国际FW大气电场数据的现代档案，以使全球大气电研究能够直接和鲁棒地进行。在项目开始和结束时，由阅读大学主办的两个讲习班将促进网络成员之间的直接交流。其中第一个将促进测量仪器和仪表的讨论，以及建立记录和存档程序，以标准化，易于访问的格式存档电场数据。CEDA-BADC已同意支持建立一个数据储存库和一个数据管理员，由阅读大学雇用，负责CEDA-BADC与项目伙伴之间的联络，以上传数据。在科学目标方面，PI将牵头调查空间天气对数据储存库中存储的电场测量结果的影响。在过去的三个太阳活动周期，如太阳耀斑，日冕物质抛射和日光层电流片交叉事件的影响的证据将使用统计技术，包括超历元分析。在第二次讲习班期间，还将编写一份同行审查出版物的大纲，其中将介绍网络和数据储存库的详细情况以及初步科学发现。这将成为所有项目伙伴联合出版物的基础，并将有助于向更广泛的科学界宣传该网络。