Vertical Ion flows in the polar cap:case studies
Polar cap is an important region in the magnetosphere-ionosphere coupling processes,in which the geomagnetic field is open to the interplanetary space and often leads to ion escaping from ionosphere.However,when the ion flows are upward and when they are downward are still not clearly.In this paper,we analyzed four cases from the observations of DMSP satellites,which located in the topside ionosphere of the polar cap region.The first case showed an average picture of topside plasma flows during quiet geomagnetic conditions,which presented downward ion fluxes in the polar cap.While a downward flux also existed in the polar cap,where there was a slowly propagating polar cap patch.Upward flows appeared in the polar cap when there were burst plasma flows in the topside ionosphere due to a frictional heating of the ions,and strong upwelling fluxes were produced from a rapid moving polar cap patch.
马羽璋 张清和 邢赞扬 王勇
山东大学(威海)空间科学研究院 威海 264209
国内会议
北京
英文
2738-2738
2015-10-11（万方平台首次上网日期，不代表论文的发表时间）