The evolution of the Sun's open magnetic flux: I. a single bipole

摘要: In this paper the origin and evolution of Sun's open magnetic flux are considered for single bipoles as they transported across Sun. The effects transport on radial field at surface Sun modeled numerically by developing earlier work Wang, Sheeley, Lean (2000). considers how initial tilt bipole axis (α) its latitude emergence affect variation magnitude flux. amount is estimated constructing potential coronal fields. It found that may evolve independently from certain ranges angle. For a given angle, lower emergence, higher end simulation. addition, three types behavior depending angle axis. When such αge2° independent initially increases before decaying away. contrast, angles in range −16°<α<2° follows continually decays. Finally, αle−16° first decays then towards second maximum This can be explained terms two competing produced differential rotation. Firstly, rotation increase or decrease rotating centers each polarity different rates when has tilt. Secondly, it decreases increasing length inversion line where cancellation occurs. results suggest that, order to reproduce realistic model over solar cycle, important have accurate input data along with their cycle progresses.