diff --git a/src/ecwam/ecwam_loki.config b/src/ecwam/ecwam_loki.config
index a0e87dbe1..42efa4f8f 100644
--- a/src/ecwam/ecwam_loki.config
+++ b/src/ecwam/ecwam_loki.config
@@ -38,6 +38,11 @@ block = ['ec_parkind', 'parkind_wave']
   allowed_aliases = "IJ"
   inline_elementals = false
 
+# Loop transformations
+[transformations.TransformLoopsTransformation]
+  module = "loki.transformations"
+[transformations.TransformLoopsTransformation.options]
+
 # Split-read-write transformation
 [transformations.SplitReadWriteTransformation]
   module = "loki.transformations"
@@ -73,14 +78,14 @@ block = ['ec_parkind', 'parkind_wave']
 # loki pipelines
 [pipelines.idem]
   transformations = [
-  'RemoveCodeTransformation', 'SplitReadWriteTransformation', 'InlineTransformation', 
-  'IdemTransformation', 'ModuleWrapTransformation', 'DependencyTransformation'
+  'RemoveCodeTransformation', 'TransformLoopsTransformation', 'SplitReadWriteTransformation',
+  'InlineTransformation', 'IdemTransformation', 'ModuleWrapTransformation', 'DependencyTransformation'
 ]
 
 [pipelines.idem-stack]
   transformations = [
-  'RemoveCodeTransformation', 'SplitReadWriteTransformation', 'InlineTransformation', 'IdemTransformation', 
-  'TemporariesPoolAllocatorTransformation', 'ModuleWrapTransformation', 'DependencyTransformation'
+  'RemoveCodeTransformation', 'TransformLoopsTransformation', 'SplitReadWriteTransformation', 'InlineTransformation',
+  'IdemTransformation', 'TemporariesPoolAllocatorTransformation', 'ModuleWrapTransformation', 'DependencyTransformation'
 ]
 
 # Define entry point for call-tree transformation
diff --git a/src/ecwam/ecwam_loki_gpu.config b/src/ecwam/ecwam_loki_gpu.config
index 1af22ef7e..f1620581c 100644
--- a/src/ecwam/ecwam_loki_gpu.config
+++ b/src/ecwam/ecwam_loki_gpu.config
@@ -53,6 +53,11 @@ block = ['ec_parkind', 'parkind_wave', 'yowdrvtype']
   module = "loki.transformations"
 [transformations.GlobalVariableAnalysis.options]
 
+# Loop transformations
+[transformations.TransformLoopsTransformation]
+  module = "loki.transformations"
+[transformations.TransformLoopsTransformation.options]
+
 # GlobalVarOffloadTransformation
 [transformations.GlobalVarOffloadTransformation]
   module = "loki.transformations"
@@ -105,20 +110,23 @@ block = ['ec_parkind', 'parkind_wave', 'yowdrvtype']
 # loki pipelines
 [pipelines.scc]
   transformations = [
-  'RemoveCodeTransformation', 'SplitReadWriteTransformation', 'InlineTransformation', 'GlobalVariableAnalysis',
-  'GlobalVarOffloadTransformation', 'SCCVectorPipeline', 'ModuleWrapTransformation', 'DependencyTransformation'
+  'RemoveCodeTransformation', 'TransformLoopsTransformation', 'SplitReadWriteTransformation', 'InlineTransformation',
+  'GlobalVariableAnalysis', 'GlobalVarOffloadTransformation', 'SCCVectorPipeline', 'ModuleWrapTransformation',
+  'DependencyTransformation'
 ]
 
 [pipelines.scc-stack]
   transformations = [
-  'RemoveCodeTransformation', 'SplitReadWriteTransformation', 'InlineTransformation', 'GlobalVariableAnalysis',
-  'GlobalVarOffloadTransformation', 'SCCStackPipeline', 'ModuleWrapTransformation', 'DependencyTransformation'
+  'RemoveCodeTransformation', 'TransformLoopsTransformation', 'SplitReadWriteTransformation', 'InlineTransformation',
+  'GlobalVariableAnalysis', 'GlobalVarOffloadTransformation', 'SCCStackPipeline', 'ModuleWrapTransformation',
+  'DependencyTransformation'
 ]
 
 [pipelines.scc-hoist]
   transformations = [
-  'RemoveCodeTransformation', 'SplitReadWriteTransformation', 'InlineTransformation', 'GlobalVariableAnalysis',
-  'GlobalVarOffloadTransformation', 'SCCHoistPipeline', 'ModuleWrapTransformation', 'DependencyTransformation'
+  'RemoveCodeTransformation', 'TransformLoopsTransformation', 'SplitReadWriteTransformation', 'InlineTransformation',
+  'GlobalVariableAnalysis', 'GlobalVarOffloadTransformation', 'SCCHoistPipeline', 'ModuleWrapTransformation',
+  'DependencyTransformation'
 ]
 
 # Define entry point for call-tree transformation
diff --git a/src/ecwam/snonlin.F90 b/src/ecwam/snonlin.F90
index 6ea5d7225..a12b69990 100644
--- a/src/ecwam/snonlin.F90
+++ b/src/ecwam/snonlin.F90
@@ -222,6 +222,7 @@ SUBROUTINE SNONLIN (KIJS, KIJL, FL1, FLD, SL, WAVNUM, DEPTH, AKMEAN)
         IF (MC > MFR1STFR .AND. MC < MFRLSTFR ) THEN
 !       the interactions for MC are all within the fully resolved spectral domain
 
+          !$loki loop-interchange
           DO KH=1,2
             DO K=1,NANG
               K1  = K1W (K,KH)
@@ -309,6 +310,7 @@ SUBROUTINE SNONLIN (KIJS, KIJL, FL1, FLD, SL, WAVNUM, DEPTH, AKMEAN)
           ENDDO
 
         ELSEIF (MC >= MFRLSTFR ) THEN
+          !$loki loop-interchange
           DO KH=1,2
             DO K=1,NANG
               K1  = K1W (K,KH)
@@ -411,6 +413,7 @@ SUBROUTINE SNONLIN (KIJS, KIJL, FL1, FLD, SL, WAVNUM, DEPTH, AKMEAN)
 
         ELSE
 
+          !$loki loop-interchange
           DO KH=1,2
             DO K=1,NANG
               K1  = K1W (K,KH)