Index: /issm/trunk-jpl/src/m/classes/SMBarma.m
===================================================================
--- /issm/trunk-jpl/src/m/classes/SMBarma.m	(revision 27350)
+++ /issm/trunk-jpl/src/m/classes/SMBarma.m	(revision 27351)
@@ -40,8 +40,4 @@
 		end % }}}
 		function self = initialize(self,md) % {{{
-			if isnan(self.trend)
-				self.trend = zeros(1,self.num_basins); %no trend in SMB
-				disp('      smb.trend (trend) not specified: value set to 0');
-			end
 			if (self.ar_order==0)
 				self.ar_order = 1; %dummy 1 value for autoregression
Index: /issm/trunk-jpl/src/m/classes/SMBarma.py
===================================================================
--- /issm/trunk-jpl/src/m/classes/SMBarma.py	(revision 27350)
+++ /issm/trunk-jpl/src/m/classes/SMBarma.py	(revision 27351)
@@ -76,7 +76,4 @@
 
     def initialize(self, md):  # {{{
-        if np.all(np.isnan(self.trend)):
-            self.trend = np.zeros((1, self.num_basins)) # No trend in SMB
-            print('      smb.trend (trend) not specified: value set to 0')
         if self.ar_order == 0:
             self.ar_order = 1 # Dummy 1 value for autoregression