Add support for saving checkpoints by calendar dates

config/default_configs/default_config.yml

@@ -155,7 +155,7 @@ test_dycore_consistency:
   help: "Test dycore consistency [`false` (default), `true`]"
   value: false
 dt_save_state_to_disk:
-  help: "Time between saving the state to disk. Examples: [`10secs`, `1hours`, `Inf` (do not save)]"
+  help: "Time between saving the state to disk. Examples: [`10secs`, `1hours`, `1months`, `Inf` (do not save)]"
   value: "Inf"
 dt_save_to_sol:
   help: "Time between saving solution. Examples: [`10days`, `1hours`, `Inf` (do not save)]"

config/model_configs/single_column_radiative_equilibrium_gray.yml

@@ -1,4 +1,4 @@
-dt_save_state_to_disk: "100days"
+dt_save_state_to_disk: "3months"
 initial_condition: "IsothermalProfile"
 hyperdiff: false
 # It seems radiative equilibrium needs a larger dz near the top

src/callbacks/get_callbacks.jl

@@ -172,7 +172,7 @@ function get_diagnostics(parsed_args, atmos_model, Y, p, dt)
     return diagnostics, writers
 end
 
-function get_callbacks(config, sim_info, atmos, params, Y, p)
+function get_callbacks(config, sim_info, atmos, params, Y, p, t_start)
     (; parsed_args, comms_ctx) = config
     FT = eltype(params)
     (; dt, output_dir) = sim_info
@@ -209,18 +209,38 @@ function get_callbacks(config, sim_info, atmos, params, Y, p)
         ),
     )
 
-    dt_save_state_to_disk =
-        time_to_seconds(parsed_args["dt_save_state_to_disk"])
-    if !(dt_save_state_to_disk == Inf)
-        callbacks = (
-            callbacks...,
-            call_every_dt(
-                (integrator) ->
-                    save_state_to_disk_func(integrator, output_dir),
-                dt_save_state_to_disk;
-                skip_first = sim_info.restart,
-            ),
+    if occursin("months", parsed_args["dt_save_state_to_disk"])
+        months = match(r"^(\d+)months$", parsed_args["dt_save_state_to_disk"])
+        isnothing(months) && error(
+            "$(period_str) has to be of the form <NUM>months, e.g. 2months for 2 months",
         )
+        period_dates = Dates.Month(parse(Int, first(months)))
+        schedule = CAD.EveryCalendarDtSchedule(
+            period_dates;
+            reference_date = p.start_date,
+            date_last = p.start_date + Dates.Second(t_start),
+        )
+        cond = let schedule = schedule
+            (u, t, integrator) -> schedule(integrator)
+        end
+        affect! = let output_dir = output_dir
+            (integrator) -> save_state_to_disk_func(integrator, output_dir)
+        end
+        callbacks = (callbacks..., SciMLBase.DiscreteCallback(cond, affect!))
+    else
+        dt_save_state_to_disk =
+            time_to_seconds(parsed_args["dt_save_state_to_disk"])
+        if !(dt_save_state_to_disk == Inf)
+            callbacks = (
+                callbacks...,
+                call_every_dt(
+                    (integrator) ->
+                        save_state_to_disk_func(integrator, output_dir),
+                    dt_save_state_to_disk;
+                    skip_first = sim_info.restart,
+                ),
+            )
+        end
     end
 
     if is_distributed(comms_ctx)

src/solver/type_getters.jl

@@ -669,7 +669,7 @@ function get_simulation(config::AtmosConfig)
     @info "ode_configuration: $s"
 
     s = @timed_str begin
-        callback = get_callbacks(config, sim_info, atmos, params, Y, p)
+        callback = get_callbacks(config, sim_info, atmos, params, Y, p, t_start)
     end
     @info "get_callbacks: $s"