Comparison of the model results based on R_Z (blue curves) and R_G (red curves) with the reconstruction of CJSS10 (black curves) for the period 1913–1986. Panels a)–d) show the case without radial diffusion. a) Total surface flux. Square and plus symbols during the last 2 cycles denote the observations from the Wilcox and Mount Wilson solar observatories, respectively. b) Time-latitude diagram of the longitudinally averaged signed surface magnetic field from the model based on R_Z. c) Polar field. Dashed and solid curves are for the southern and northern hemispheres, respectively. The cyan vertical lines indicate the inferred times of polar field reversals from Makarov et al. (2003). d) Open heliospheric flux. The dash-dotted curve represents the result inferred from the geomagnetic aa index (Lockwood et al. 2009). e), f): results with radial diffusivity η_r = 25 km²s^-1. e) Polar field. f) Open heliospheric flux.