空间科学学报2018，Vol.38Issue(3)：285-295,11.DOI:10.11728/cjss2018.03.285
WSA太阳风经验模型及其应用
Analysis of Present Research on the WSA Solar Wind Model
摘要
Abstract
The Wang-Sheeley-Arge (WSA) model is an empirical model that can predict the background solar wind speed and Interplanetary Magnetic Field (IMF) polarity on the Earth.It utilizes the line-of-sight synoptic solar magnetograms as input to give predictions about 3 to 4 days in advance.It is an improved version of the original Wang and Sheeley (WS) model.The relationship was generalized according to the parameters of the Coronal Hole Boundary (DCHB) model.The solar wind velocity is first determined at a certain height by the expansion factor of the magnetic field and the minimum angular distance that an open field footpoint lies from nearest coronal hole boundary.And then a simple 1-D modified kinematic model (1-DMK),which includes an ad hoc method to account for stream interactions,is used to transport the wind from the corona out to the Earth.In the course of development,the WSA model has been improved gradually in the details,such as the source of synoptic magnetograms,the type of coronal magnetic field model,the values of free parameters in velocity relation,the way of mapping the solar wind to earth and so on.Many studies were devoted to improve the prediction accuracy of the WSA model,and it is widely used now in many Magnetohydrodynamic (MHD) solar wind model.关键词
WSA模型/太阳风/日冕磁场Key words
WSA model/Solar wind/Coronal magnetic field分类
天文与地球科学引用本文复制引用
杨子才,沈芳,杨易,冯学尚..WSA太阳风经验模型及其应用[J].空间科学学报,2018,38(3):285-295,11.基金项目
国家自然科学基金项目(41231068,41474152,41531073,41774184),国家重点实验室专项研究基金和国家“万人计划”青年拔尖人才项目共同资助 （41231068,41474152,41531073,41774184）
