The total amount of rain, hail , snow or dew, measured in rain gauges and expressed in mm per month. This factor is not recorded but is here to indicate the confusion that exists between wind speed at a location and the internal air movement. When carrying out a Bioclimatic analysis or Thermal Analysis of a location or building you will be asked to estimate Air Movement. Wind speed is normally measured at 10m above ground in open country, but at greater heights in urban areas to avoid obstruction. The present database does not record this information.
Air movement is considered to be that which occurs within buildings.
It may be caused by external wind conditions or internal conditions. Air movement affects the human body in two different ways. In the first instance it determines the convective heat exchange of the body. In the second case it affects the evaporative capacity of the air and consequently the cooling efficiency of sweating. Awareness of air movement.