temperature-humidity index


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temperature-humidity index:

see humidityhumidity,
moisture content of the atmosphere, a primary element of climate. Humidity measurements include absolute humidity, the mass of water vapor per unit volume of natural air; relative humidity (usually meant when the term humidity
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temperature-humidity index

[′tem·prə·chər hyü′mid·ədē ‚in‚deks]
(meteorology)
An index which gives a numerical value, in the general range of 70-80, reflecting outdoor atmospheric conditions of temperature and humidity as a measure of comfort (or discomfort) during the warm season of the year; equal to 15 plus 0.4 times the sum of the dry-bulb and wet-bulb temperatures in degrees Fahrenheit. Also known as comfort index; discomfort index. Abbreviated CI; DI; THI.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Changes in the estimates of variance components by temperature-humidity index (THI).
Heritability estimates for milk yield at different temperature-humidity index (THI) values.
Figure 5 shows the maps of temperature-humidity index (THI) for the mean temperature conditions during the day- and nighttime periods observed inside the experimental facility in the first three weeks of life of the birds.
[5.] Schuller LK, Burfeind O, Heuwieser W Impact of heat stress on conception rate of dairy cows in the moderate climate considering different temperature-humidity index thresholds, periods relative to breeding, and heat load indices.
Climatic data were recorded during the experiment period, in which air temperature (C) and relative humidity (%) values were recorded using a thermo-hygrometer and were later utilized to calculate the temperature-humidity index (THI) according to Armstrong (1994).
Is the temperature-humidity index the best indicator of heat stress in lactating dairy cows in a subtropical environment?
The devices were installed in the center of each facility and, based on the obtained data, the temperature-humidity index (THI) was calculated through the equation proposed by Bunffington et al.
Seasonal variations in the composition of Holstein cow's milk and temperature-humidity index relationship.

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