Table 2.
Maximum, minimum, and mean daily ambient temperature (TA), relative humidity (RH) and temperature humidity index (THI)1
| TA, ºC | RH, % | THI2 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Source/cycle | Max. | Min. | Mean | Max. | Min. | Mean | Max. | Min. | Mean |
| Ambient air | |||||||||
| Cycle 1 | 42.5 | 10.1 | 23.9 | 70.4 | 12.9 | 47.7 | 86.2 | 48.6 | 67.8 |
| Cycle 2 | 40.0 | 7.7 | 21.5 | 71.3 | 13.4 | 52.1 | 85.9 | 44.0 | 65.0 |
| Cycle 3 | 25.6 | 0.8 | 12.2 | 64.8 | 18.4 | 43.2 | 72.5 | 31.5 | 52.7 |
| Cattle pen enclosures | |||||||||
| Cycle 1 | 40.4 | 9.0 | 21.2 | 94.4 | 19.5 | 72.7 | 85.5 | 51.9 | 69.1 |
| Cycle 2 | 40.0 | 6.4 | 19.1 | 98.7 | 23.1 | 79.2 | 83.3 | 48.3 | 66.5 |
| Cycle 3 | 26.6 | -0.8 | 11.5 | 99.9 | 27.5 | 86.8 | 70.2 | 38.7 | 55.2 |
1The temperature (TA) and relative humidity (RH) within CPE were monitored every 15 s during the 15-min emissions sampling periods using RH/T sensors (Dwyer Instruments, Inc., Michigan City, IN), and the same measurements were obtained for outside ambient air continuously using an on-site weather station (Novalynx, Model 110-WS-16, Auburn, CA).
2THI was calculated using the equation of Mader et al. (2006) where THI = (0.8 × TA) + [(RH × 0.01) × (TA – 14.4)] + 46.4; TA = ambient temperature; RH = relative humidity %.