15_08_86 - 65 62 59 30 96 93 89 86 83 79 76 73 70 67 64 61...

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DETERMINATION OF RELATIVE HUMIDITY FROM WET AND DRY BULB TEMPERATURES Relative humidity may be determined by comparing tempera- ture readings of wet and dry bulb thermometers. The following ta- ble, extracted from more extensive U.S. National Weather Service tables, gives the relative humidity as a function of air temperature t d (dry bulb) and the difference t d t w between dry and wet bulb temperatures. The data assume a pressure near normal atmo- spheric pressure and an instrumental configuration with forced ventilation. ( t d t w )/°C t d /°C 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 –10 83 67 51 35 19 –8 86 71 57 43 29 15 –6 88 74 61 49 37 25 8 –4 89 77 66 55 44 33 23 12 –2 90 79 69 60 50 40 31 22 12 0 91 81 72 64 55 46 38 29 21 13 5 2 91 84 76 68 60 52 44 37 29 22 14 7 4 92 85 78 71 63 57 49 43 36 29 22 16 6 93 86 79 73 66 60 54 48 41 35 29 24 8 93 87 81 75 69 63 57 51 46 40 35 29 10 94 88 82 77 71 66 60 55 50 44 39 34 12 94 89 83 78 73 68 63 58 53 48 43 39 14 95 90 85 79 75 70 65 60 56 51 47 42 16 95 90 85 81 76 71 67 63 58 54 50 46 18 95 91 86 82 77 73 69 65 61 57 53 49 20 96 91 87 83 78 74 70 66 63 59 55 51 22 96 92 87 83 80 76 72 68 64 61 57 54 24 96 92 88 84 80 77 73 69 66 62 59 56 26 96 92 88 85 81 78 74 71 67 64 61 58 28 96 93 89 85 82 78 75 72 69
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Unformatted text preview: 65 62 59 30 96 93 89 86 83 79 76 73 70 67 64 61 35 97 94 90 87 84 81 78 75 72 69 67 64 40 97 94 91 88 85 82 80 77 74 72 69 67 ( t d t w )/C t d /C 6.5 7.0 7.5 8.0 8.5 9.0 10.0 11.0 12.0 13.0 14.0 15.0 4 9 6 17 11 5 8 24 19 14 8 10 29 24 20 15 10 6 12 34 29 25 21 16 12 5 14 38 34 30 26 22 18 10 16 42 38 34 30 26 23 15 8 18 45 41 38 34 30 27 20 14 7 20 48 44 41 37 34 31 24 18 12 6 22 50 47 44 40 37 34 28 22 17 11 6 24 53 49 46 43 40 37 31 26 20 15 10 5 26 54 51 49 46 43 40 34 29 24 19 14 10 28 56 53 51 48 45 42 37 32 27 22 18 13 30 58 55 52 50 47 44 39 35 30 25 21 17 32 60 57 54 51 49 46 41 37 32 28 24 20 34 61 58 56 53 51 48 43 39 35 30 26 23 36 62 59 57 54 52 50 45 41 37 33 29 25 38 63 61 58 56 54 51 47 43 39 35 31 27 40 64 62 59 57 54 53 48 44 40 36 33 29 15-32...
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