...
Section | |||||||
---|---|---|---|---|---|---|---|
|
...
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.
...
Line (Line Hovm)
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.
coordinates of a transect line along which the Hovmøller diagram is calculated. Enter the coordinates (lat/long) of a line separated by a "/" (lat1/long1/lat2/long2). Alternatively, use the coordinate assist button.
Area (Area Hovm or Vertical Hovm)
...
Specifies the coordinates of the area over which the average profile Hovmøller diagram is calculated. Enter the 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.
Average Direction (Area Hovm)
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
Time Axis Mode
Specifies the direction of the date/time axis. Options are:
- User (default) - Left/bottom date is taken from the Date Min parameter and the right/top date is taken from the Date Max parameter.
- Automatic Forwards - Date limits are taken from the data and plotted left to right or bottom to top.
- Automatic Backwards - Date limits are taken from the data and plotted right to left or top to bottom.
Option Automatic Forwards has the same effect as option User with default Date Min and Date Max.
Date Min
Specifies the horizontal date minimum value. Default value AUTOMATIC indicates that the minimum value will be taken from the input data.
Date Max
Specifies the horizontal date maximum value. Default value AUTOMATIC indicates that the maximum value will be taken from the input data.
Bottom Level (Vertical Hovm)
Specifies the vertical lower limit value, as a pressure level (hPa) or model level (η levels).
Top Level (Vertical Hovm)
Specifies the vertical upper limit value, as a pressure level (hPa) or model level (η levels).
Swap Axes
By default, the definition of the vertical and horizontal axes of the Hovmøller diagrams follows pre-defined rules. However, if Swap Axes is set to Yes then the axes will be swapped around.
Resolution
Used to interpolate the data onto a regular grid, and applies to both the horizontal and vertical axes where appropriate. This parameter is essential for creating a Hovmøller diagram from satellite data.
Time Axis
Specifies the characteristics of the time-series axis to be used in the plotting of the data.Specifies the plotting attributes of the horizontal axis. An Only an Axis Plotting icon can be dropped here. The following axis parameters are defined by the application; therefore, users should not change their values directly: Axis Type (set to Date), Axis Date Min Value and Axis Date Max Value (set according to the above parameters Date Min and Date Max, respectively), and Axis Orientation.
The Axis Orientation parameter is defined according to the following rules:
a) if the selected input pane is Line Hovm, the value is set to Horizontal;
b) if the selected input pane is Area Hovm and the Average Direction is East West, the value is set to Horizontal
c) if the selected input pane is Area Hovm and the Average Direction is North South, the value is set to Vertical.
d) if the selected input pane is Vertical Hovm, the value is set to Horizontal.
However, it is possible to change the Axis Orientation value from its calculated default by setting parameter Swap Axes to Yes. This option is not available for Vertical Hovm.
Geo Axis
Specifies the characteristics of the geographical axis to be used in the plotting of the data. Only an Axis Plotting icon can be dropped here. The following axis parameters are defined by the application; therefore, users should not change their values directly: Axis Min Value and Axis Max Value (set according to the values given by parameters Line or Area), Axis Type, Axis Tick Label Type and Axis Orientation. The Axis Type and Axis Tick Label Type parameters are defined according to the following rules:
a) if the selected input pane is Line Hovm, the Axis Type value is set to Geoline.
b) if the selected input pane is Area Hovm and the Average Direction is East West, the Axis Type value is set to Regular and Axis Tick Label Type to Latitude.
c) if the selected input pane is Area Hovm and the Average Direction is North South, the Axis Type value is set to Regular and Axis Tick Label Type to Longitude.
Moreover, the Axis Orientation parameter is defined according to the following rules:
a) if the selected input pane is Line Hovm, the value is set to Vertical
b) if the selected input pane is Area Hovm and the Average Direction is East West, the value is set to Vertical
c) if the selected input pane is Area Hovm and the Average Direction is North South, the value is set to Horizontal.
However, it is possible to change the Axis Orientation value from its calculated default by setting parameter Swap Axes to Yes.
Vertical Axis (Vertical Hovm)
Specifies the characteristics of the level-series axis to be used in the plotting of the data. plotting attributes of the vertical axis. An Only an Axis Plotting icon can be dropped here. The following axis parameters are defined by the application; therefore, users should not change their values directly: Axis Min Value and Axis Max Value (set according to the input data set), Axis Type, Axis Tick Label Type and Axis Orientation.
Vertical Level Type (Vertical Hovm)
Specifies if a conversion from model level to pressure level needs to be performed. Options are As In Data and Pressure, If the conversion to pressure is selected and the input data is specified in model levels, the LNSP field should be added to the input data.
Vertical Scaling (Vertical Hovm)
Specifies the type of vertical axis - Linear or Logarithmic.
Excerpt Include | ||||||
---|---|---|---|---|---|---|
|