diff --git a/games/age-of-four/data/climate_params.json b/games/age-of-four/data/climate_params.json
index 4e5d496b..ca15e238 100644
--- a/games/age-of-four/data/climate_params.json
+++ b/games/age-of-four/data/climate_params.json
@@ -218,5 +218,15 @@
   "wind_friction_land": 0.7,
   "wind_friction_mountain_downwind": 0.1,
   "solar_min": 0.15,
-  "solar_max": 0.70
+  "solar_max": 0.70,
+  "orbital_cycle_1_period": 400,
+  "orbital_cycle_1_amplitude": 0.015,
+  "orbital_cycle_1_phase": 0.0,
+  "orbital_cycle_2_period": 260,
+  "orbital_cycle_2_amplitude": 0.010,
+  "orbital_cycle_2_phase": 1.05,
+  "orbital_cycle_3_period": 1000,
+  "orbital_cycle_3_amplitude": 0.020,
+  "orbital_cycle_3_phase": 2.40,
+  "orbital_moisture_coupling": 0.5
 }