delay variation delay and delay variation bounded
interdecadal variation and interannual variation
noncyclic variation (=non-periodic variation)
Seasonal variation of diurnal variation
Name of the place and name of the station
‘bamboo’ shape variation error
∧-bounded mean variation
∧-function of bounded variation
20 years temporal and spatial variation
24-hour Runoff Variation
3-dimensional variation
3-dimentional variation assimilation 3D-Var
3D-Var(3-dimensional variation) assimilation