From AMS Glossary
Revision as of 19:21, 26 January 2012 by Perlwikibot
In 1861, W. S. Jevons pointed out that the rain gauge causes a disturbance in airflow past it, which carries past the gauge part of the rain that would normally be captured. The effect is a function of the wind speed and the height of the gauge from the ground. Rain-gauge shields have been devised to minimize this loss.