Adjustments for Wind Speed and Solar Radiation to the Temperature-Humidity Index

Authors

Shane Davis, University of Nebraska-Lincoln
Terry L. Mader, University of Nebraska-LincolnFollow

Date of this Version

January 2003

Comments

Published in 2003 Nebraska Beef Cattle Report. Copyright © 2002 The Board of Regents of the University of Nebraska.

Abstract

Data from three separate feedlot finishing trials were combined into one data set to determine wind speed and solar radiation adjustments to the temperature- humidity index equation based on degree of panting and ambient environmental conditions. Regression equations were used to determine the relationship between observed panting and current temperature-humidity index, wind speed and solar radiation for developing correction factors. Based on these calculations, for each 1 mile/ hour increase in wind speed, THI should be decreased approximately 1 unit, and for each 3 Langley increase in solar radiation or 10% increase in cloud cover, THI should be decreased approximately 1 unit.