~*Guidelines For Constructing Vector Components*~

Guidelines For Constructing Vector Components


change_over_time_in_X
[X]
change in a quantity X over a time-interval, which should be defined by the bounds of the time coordinate.
[horizontal_]convergence_of_X
[X] m-1
[horizontal] convergence of a vector X (i.e. the divergence multiplied by -1); if X does not have a vertical component then "horizontal" should be omitted.
correlation_of_X_and_Y[_over_Z]
1
correlation coefficient for variations (over Z e.g. time, longitude) of X and Y. X and Y are ordered alphabetically.
covariance_of_X_and_Y[_over_Z]
[X]*[Y]
covariance for variations (over Z e.g. time, longitude) of X and Y. X and Y are ordered alphabetically.
component_derivative_of_X
[X] m-1
derivative of X with respect to distance in the component direction, which may be northward, southward, eastward, westward, x or y. The last two indicate derivatives along the axes of the grid, in the case where they are not true longitude and latitude.
derivative_of_X_wrt_Y
[X]/[Y]
dX/dY.
direction_of_X
degree
direction of a vector, a bearing.
[horizontal_]divergence_of_X
[X] m-1
[horizontal] divergence of a vector X; if X does not have a vertical component then "horizontal" should be omitted.
histogram_of_X[_over_Z]
1
histogram (i.e. number of counts for each range of X) of variations (over Z) of X. The data variable should have an axis for X.
integral_of_Y_wrt_X
[X]*[Y]
int Y dX. The data variable should have an axis for X specifying the limits of the integral as bounds.
ln_X
1
natural logarithm of X. X must be dimensionless.
log10_X
1
common logarithm (i.e. base 10) of X. X must be dimensionless.
magnitude_of_X
[X]
magnitude of a vector X.
probability_distribution_of_X[_over_Z]
1
probability distribution (i.e. a number in the range 0.0-1.0 for each range of X) of variations (over Z) of X. The data variable should have an axis for X.
probability_density_function_of_X[_over_Z]
1/[X]
PDF for variations (over Z) of X. The data variable should have an axis for X.
product_of_X_and_Y
[X]*[Y]
X*Y. If X and Y are both scalars or both components of vectors, they are put in alphabetical order. If one of them is the component of a vector, it is put first i.e. the vector component is X, the scalar is Y.
ratio_of_X_to_Y
[X]/[Y]
X/Y.
square_of_X
[X]*[X]
X*X.
tendency_of_X
[X] s-1
derivative of X with respect to time.


source:http://cf-pcmdi.llnl.gov/documents/cf-standard-names/guidelines