csol_sand decomp_depth_efolding FUN_fracfixers jmaxb0 jmaxb1 kmax leafcn lmr_intercept_atkin maxpsi_hr minpsi_hr q10_mr rf_l1s1_bgc rf_l2s1_bgc rf_l3s2_bgc rf_s2s3_bgc sand_pf tau_l2_l3 tau_s2 tau_s3 theta_cj tpu25ratio wc2wjb0