This icon is a plotting specification for Hovmøller diagram plots from a suitable GRIB data source. It can also take the output from a Hovmoeller Data icon as an input. In this case, a consistency check is performed between the parameters that are common to both icons.

In addition to the parameters required for the  Hovmøller diagram computation, this icon specifies the axis details as well as the plot positioning in the plot frame of the display window / paper sheet and the overlay of different data units in the same plot.

To access the computed output values use the  icon Hovmoeller Data.

Further details on the role and usage of View icons in the visualisation process, please see Views.

The macro language equivalent is mhovmoellerview().

The Hovmoeller View Editor

Type

Specifies the type of the Hovmøller diagram to be produced. Options are:

Area Hovm     - diagram derived from an input rectangular area.

Line Hovm      - diagram derived from an input transect line

Vertical Hovm - diagram derived from an input rectangular area and a set of levels.

Top Level

Specifies the upper limit of the average cross section, as a pressure level (hPa) or model level (η levels).

Vertical Scaling

Specifies the type of vertical axis - Linear or Logarithmic.

Interpolate Values

Specifies whether to interpolate vertically the cross-section values into a regular set of interpolated vertical levels. Choosing not to interpolate returns a cross section data matrix with values at the original levels.

Note - if you need to use the cross section data in calculations further down the stream you should not interpolate.

Area

Specifies the coordinates of the area over which the average profile is calculated. Enter coordinates (lat/long) of an area separated by a "/" (top left lat and long, bottom right lat and long). Alternatively, use the coordinate assist button.

Direction

Specifies the direction along which the averaging of the variable is performed. Options are North South and East West. For North South, the averaging is weighted by cos(latitude).

Horizontal Axis

Specifies the plotting attributes of the horizontal axis. An Axis Plotting icon can be dropped here.

Vertical Axis

Specifies the plotting attributes of the vertical axis. An Axis Plotting icon can be dropped here.