Radiative forcing of the direct aerosol effect from AeroCom Phase II simulations by Myhre, G, Samset, B, Schulz, M, Balkanski, Y, Bauer, S, Berntsen, T, Bian, H, Bellouin, N, Chin, M, Diehl, T, Easter, R, Feichter, J, Ghan, S, Hauglustaine, D, Iversen, T, Kinne, S, Kirkevaag, A, Lamarque, J, Lin, G, Liu, X, Lund, M, Luo, G, Ma, X, van Noije, T, Penner, J, Rasch, P, Ruiz, A, Seland, O, Skeie, R, Stier, P, Takemura, T, Tsigaridis, K, Wang, P, Wang, Z, Xu, L, Yu, H, Yu, F, Yoon, J, Zhang, K, Zhang, H, Zhou, C