Merge pull request #91 from rcaneill/patch-1

Correct Nsquared unit

Author: efiring

gsw/stability.py

@@ -47,9 +47,10 @@ def Nsquared(SA, CT, p, lat=None, axis=0):
     Returns
     -------
     N2 : array
-        Buoyancy frequency-squared at pressure midpoints, 1/s.
+        Buoyancy frequency-squared at pressure midpoints, 1/s^2.
         The shape along the pressure axis dimension is one
         less than that of the inputs.
+        (Frequency N is in radians per second.)
     p_mid : array
         Pressure at midpoints of p, dbar.
         The array shape matches N2.