Unidata Summer Workshop - 2003

IDV Lab F Part d

  • Adjust the width of this window as needed.

Immediately below, is an IDV display window, that is fully interactive. Grab the display with the right mouse button and drag it around to see what happens! It is just like the display window in the, Unidata IDV, window, except it is embedded in a web browser.

Below the display window there are two buttons: one for selecting a model run and one for creating a display.

  • Select the same model run used earlier in this lab.
  • Click the, Create Wind Speed Isosurface, button.
ETA Model run: e.g., YYYYMMDD_HHHH  

An isosurface is a three dimensional surface connecting points with the same value. The volume inside the wind speed isosurface has wind speeds greater than the selected value, and tends to form 'pods' along the core of the jet stream. The default value for wind speed is 30 m/s, which can be changed from the display's control window.

To better understand this concept, overlay a vertical cross section on the isosurface. Use the two buttons immediately below:

  • Select the same model run used earlier in this lab.
  • Click the, Create Wind Speed Cross Section, button.
  • Close the new window that opens with cross section display properties.
  • Drag the ends of the cross section, with the left mouse button, so that the cross section is perpendicular to the jet stream.
  • Then rotate the display, by dragging with the right mouse button, to expose the wind speed contours.
  • Turn the animation on with the loop control buttons.
ETA Model run: e.g., YYYYMMDD_HHHH  

Return to the main set of instructions for this lab.