allocate_age_model allocate_basal_yield_stress allocate_bed_deformation allocate_bedrock_thermal_unit allocate_couplers allocate_energy_model allocate_geometry_evolution allocate_iceberg_remover allocate_isochrones allocate_scalar_diagnostics allocate_spatial_diagnostics allocate_storage allocate_stressbalance allocate_subglacial_hydrology allocate_submodels append_history basal_yield_stress_model bed_deformation_model bedrock_thermal_model bedrock_thermal_model_step bootstrap_2d calving combine_basal_melt_rate common_metadata compute_geometry_change compute_lat_lon compute_original_ice_fraction compute_temperate_base_fraction ConsistencyFlag ctx deallocate_unused_diagnostics define_time define_variables diagnostic_variables dt energy_balance_model energy_model_inputs energy_step enforce_consistency_of_geometry forced_retreat front_retreat_step frontal_melt geometry geometry_evolution grid hydrology_step IceModel identify_open_ocean init init_calving init_checkpoints init_final_output init_front_retreat init_frontal_melt init_outputs init_scalar_diagnostics init_snapshots init_spatial_diagnostics initialize_2d list_diagnostics m_adaptive_timestep_reason m_age_model m_available_scalar_diagnostics m_available_spatial_diagnostics m_basal_melt_rate m_basal_yield_stress m_basal_yield_stress_model m_beddef m_bedtoptemp m_btu m_calving_rate_factor m_checkpoint_file_contents m_checkpoint_filename m_checkpoint_vars m_config m_ctx m_current_snapshot m_dt m_dt_TempAge m_eigen_calving m_energy_model m_float_kill_calving m_fracture m_front_retreat m_frontal_melt m_geometry m_geometry_evolution m_grid m_hayhurst_calving m_ice_thickness_bc_mask m_iceberg_remover m_isochrones m_last_checkpoint_time m_last_spatial_time m_log m_model_state m_n_work2d m_new_bed_elevation m_next_spatial_index m_ocean m_output_file_contents m_output_filename m_output_global_attributes m_output_history m_output_vars m_output_writer m_prescribed_retreat m_scalar_file m_scalar_times m_scalar_vars m_sea_level m_skip_countdown m_snapshot_file m_snapshot_file_contents m_snapshot_times m_snapshot_vars m_snapshot_writer m_snapshots_filename m_spatial_file m_spatial_file_contents m_spatial_filename m_spatial_times m_spatial_vars m_spatial_writer m_split_snapshots m_start_time m_stdout_flags m_step_counter m_stress_balance m_subglacial_hydrology m_submodels m_surface m_surface_input_for_hydrology m_sys m_t_TempAge m_thickness_change m_thickness_threshold_calving m_time m_timestep_hit_multiples_last_time m_velocity_bc_mask m_velocity_bc_values m_viewers m_vonmises_calving m_work2d max_timestep max_timestep_diffusivity misc_setup model_state_setup ocean_model output_variables post_step_hook pre_step_hook print_summary print_summary_line process_signals regrid reset_counters restart_2d run run_to save_state_on_error scalar_diagnostics_flush_buffers scalar_diagnostics_max_timestep set_python_ocean_model skip_counter snapshots_max_timestep spatial_diagnostics_max_timestep state_variables state_variables_diagnostics step stress_balance stress_balance_inputs update_diagnostics update_fracture_density update_viewers view_field write_checkpoint write_diagnostics write_final_output write_run_stats write_snapshot write_spatial_diagnostics write_state write_state_diagnostics yield_stress_inputs ~IceModel

compute_original_ice_fraction() double pism::IceModel::compute_original_ice_fraction ( double  total_ice_volume ) protectedvirtual Computes fraction of the ice which is as old as the start of the run (original). Communication occurs here. Definition at line 3712 of file diagnostics.cc. References pism::Geometry::cell_type, pism::ParallelSection::check(), pism::units::convert(), pism::ParallelSection::failed(), pism::array::Array3D::get_column(), pism::GlobalSum(), pism::Geometry::ice_thickness, pism::array::CellType::icy(), pism::k, m_age_model, m_geometry, m_grid, m_sys, and m_time.