diff --git a/config/amip_configs/amip.yml b/config/amip_configs/amip.yml
index 5bb754c729..7e83976f5d 100644
--- a/config/amip_configs/amip.yml
+++ b/config/amip_configs/amip.yml
@@ -24,6 +24,6 @@ t_end: "1098days"
 topo_smoothing: true
 topography: "Earth"
 turb_flux_partition: "CombinedStateFluxesMOST"
-viscous_sponge: false
+viscous_sponge: true
 z_elem: 63
 z_max: 55000.0
diff --git a/config/nightly_configs/amip_coarse.yml b/config/nightly_configs/amip_coarse.yml
index 9a3b7f8016..9e78d658d3 100644
--- a/config/nightly_configs/amip_coarse.yml
+++ b/config/nightly_configs/amip_coarse.yml
@@ -3,8 +3,8 @@ albedo_model: "CouplerAlbedo"
 anim: false
 atmos_config_file: "config/longrun_configs/amip_target_diagedmf.yml"
 coupler_toml_file: "toml/amip.toml"
-dt: "180secs"
-dt_cpl: 180
+dt: "240secs"
+dt_cpl: 240
 dt_save_state_to_disk: "30days"
 dt_save_to_sol: "30days"
 dz_bottom: 100.0
@@ -22,10 +22,10 @@ rayleigh_sponge: true
 smoothing_order: 10
 start_date: "20100101"
 surface_setup: "PrescribedSurface"
-t_end: "549days"
+t_end: "732days"
 topo_smoothing: true
 topography: "Earth"
 turb_flux_partition: "CombinedStateFluxesMOST"
-viscous_sponge: false
+viscous_sponge: true
 z_elem: 31
-z_max: 50000.0
+z_max: 55000.0
diff --git a/config/nightly_configs/amip_coarse_random.yml b/config/nightly_configs/amip_coarse_random.yml
index 94dbb64da2..66973a5f33 100644
--- a/config/nightly_configs/amip_coarse_random.yml
+++ b/config/nightly_configs/amip_coarse_random.yml
@@ -3,8 +3,8 @@ albedo_model: "CouplerAlbedo"
 anim: false
 atmos_config_file: "config/longrun_configs/amip_target_diagedmf.yml"
 coupler_toml_file: "toml/amip.toml"
-dt: "180secs"
-dt_cpl: 180
+dt: "240secs"
+dt_cpl: 240
 dt_save_state_to_disk: "30days"
 dt_save_to_sol: "30days"
 dz_bottom: 100.0
@@ -22,11 +22,11 @@ rayleigh_sponge: true
 smoothing_order: 10
 start_date: "20100101"
 surface_setup: "PrescribedSurface"
-t_end: "549days"
+t_end: "732days"
 topo_smoothing: true
 topography: "Earth"
 turb_flux_partition: "CombinedStateFluxesMOST"
 unique_seed: true
-viscous_sponge: false
+viscous_sponge: true
 z_elem: 31
-z_max: 50000.0
+z_max: 55000.0