Improving MAGagnetogram (MAG4) Forecasting of Severe Space Weather Drivers by Measuring Magnetic Nonpotentiality of Active Regions Using HMI/SDO Vector Magnetograms

GSTDTAP

项目编号	1601926
	Improving MAGagnetogram (MAG4) Forecasting of Severe Space Weather Drivers by Measuring Magnetic Nonpotentiality of Active Regions Using HMI/SDO Vector Magnetograms
	Sanjiv Tiwari
主持机构	University of Alabama in Huntsville
项目开始年	2016
	2016-12-01
项目结束日期	2019-11-30
资助机构	US-NSF
项目类别	Continuing grant
项目经费	125114(USD)
国家	美国
语种	英语
英文摘要	Improving the forecasts of the drivers of space weather has broad social impact. Given the continuously increasing dependency of humanity on satellites, which can be endangered by severe space weather caused by solar flares and CMEs, this research is of high importance and priority and is urgent. Additional broader impact includes the improved accuracy in the alert for geomagnetic storms causing damages to e.g., power grids and transformers, satellites and humans in space. This three year project is focused on identifying the magnetic parameters that drive solar explosive events. Solar flares and coronal mass ejections (CMEs) are the primary drivers of space weather. Forecasts of their probability of occurrence and relative magnitude, are critical for the protection of national assets in the geospace environment. Both flares and CMEs are the results of explosive release of energy stored in the coronal magnetic field. The free magnetic energy released is energy in excess of the potential magnetic field configuration of the source active region (AR). The nonpotentiality of ARs can be inferred from various twist parameters, free-energy proxies and size parameters, most of which require vector magnetograms (all three components of magnetic field) for their measurement. The team will use HMI vector magnetograms to measure various nonpotentiality parameters of source ARs and determine the parameter or combination of them for best forecasting using a method they have previously developed. The integration of SDO/HMI vector magnetograms is an improvement on the forecasting capability of MAG4 which currently uses SOHO/MDI. Additionally, the project will add active region CME histories into the existing solar flare database and try to find out relationship between the CME speed/width and the magnetic parameters.
来源学科分类	Geosciences - Atmospheric and Geospace Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/70613
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Sanjiv Tiwari.Improving MAGagnetogram (MAG4) Forecasting of Severe Space Weather Drivers by Measuring Magnetic Nonpotentiality of Active Regions Using HMI/SDO Vector Magnetograms.2016.