The synoptic maps of the open and closed magnetic field distributions at the solar surface. The first row shows modeled results. Red and blue colors indicate open field regions of positive and negative B _r From left to right, the maps are obtained at the start of CR 2070, the start of CR 2071 (also the end of CR 2070), and the end of CR 2071. The second row shows the EUVI/STEREO A observations at 195 Å obtained during CR 2070 (left) and CR 2071 (right).