416 



CORRELATION OF DISTRIBUTIONAL FEATURES. 



Table 47. — Climatic extremes for region udth 10 to 14 species of evergreen broad-leaved trees 



(West). 



Plate 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 

 43 

 44 

 45 



46 

 47 

 48 

 49 

 50 

 61 

 52 



53 

 54 



58 

 69 

 60 



63 



65 

 66 



68 



69 



70 

 71 



72 



Temperature: 



Days in normal frostless season (/s) 



Hot days, fs 



Cold days, fs 



Remainder summation above 32°, year (thousands) 



Remainder summation above 39°, fs (thousands) . . 



Exponential summation, fs (hundreds) 



Physiological summation, fs (thousands) 



Absolute minimum 



Normal daily mean, coldest 14 days of year (°F.) . . 



Normal daily mean, hottest 6 weeks of year (°F.) . 



Normal daily mean, year (°F.) 



Precipitation: 



Normal daily mean, fs (inch) 



Normal No. rainy days (over 0.10 inch), fs 



Normal No, dry days (0.10 inch or less), fs 



Dry days, percentage of total, fs (per cent) 



Days in longest normal rainy period, fs 



Days in longest normal dry period, fs 



Mean total, year (inches) 



Evaporation: 



Daily mean, 1887- 88, fs (inch) 



Total annual, 1887-88 (inches) 



Moisture ratios: 



Normal P/E, fs 



Normal v/E, fs 



Normal P/E, year 



Vapor pressure: 



Normal mean, fs (hundredths inch) 



Humidity: 



Normal mean, fs (per cent) 



Normal mean, year (per cent) 



Wind: 



Normal mean hourly velocity, fs (miles) 



Sunshine: 



Normal total duration, fs (hours) 



Moisture-temperature indices: 



Normal P/E X T, fs, remainder method 



Normal P/E XT, fs, exponential method 



Normal P/E X T, fs, physiological method 



Low, 

 237 









 18.0 + 



5.2 



6.01 



4.1 

 + 13 

 49 



64.4- 

 60- 



.033 



25 

 235 



81 



22 

 232 



20- 



32 



.102 

 .5 



.37 



.45 

 .27 



335 



69. 

 69. 



4.5 



2,615 



283 

 2,598 

 1,191 



High. 

 334 

 54 





 18.0 + 



8.0+» 



8.0 + 



8.4 

 +32 

 54 

 64.4 

 60 + 



.048 



62 

 294 



90 



50 

 299 



30 + 



.104 

 36.7 



.48 

 .61 

 .60 



378 



80.1 

 79.9 



17.2 



2,995 



283 

 2,721 

 3.127 



Table 48. — Climatic extremes for region with 15 to 63 species of evergreen broad-leaved trees 



(East). 



Plate 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 

 43 

 44 

 45 



46 

 47 

 48 

 49 

 60 

 61 

 52 



Temperature: 



Days in normal frostless season (fs) 



Hot days, fs 



Cold days, fs 



Remainder summation above 32°, year (thousands) . 



Remainder summation above 39°, fs (thousands) . . . 



Exponential summation, fs (hundreds) 



Physiological siunmation, fs (thousands) 



Absolute minimum 



Normal daily mean, coldest 14 days of year (°F.) . . 



Normal daily mean, hottest 6 weeks of year (°F.) . . 



Normal daily mean, year (°F.) 



Precipitation: 



Normal daily mean, fs (inch) 



Normal No. rainy days (over 0.10 inch), fs 



Normal No. dry days (0.10 inch or less), fs 



Dry days, percentage of total, fs (per cent) 



Days in longest normal rainy period, fs 



Days in longest normal dry period, fs 



Mean total, year (inches) 



Low. 

 311 



210-a 

 



18.0 + 

 9.0+<» 

 10.0 + 

 17.5 + 

 + 16 

 55a 



78.8 + 

 70 + 



.147 

 165 

 100+" 



30 -« 

 137 



25<» 



50 + 



High. 



335 



226 

 

 26.0 + 

 10.0+" 

 11.0 + 

 22.5 

 +22 

 60 -» 

 78.8 + 

 75- 



.150 

 225+0 

 170 



51 

 2000 



78 



50 + 



