. The vegetation of a desert mountain range as conditioned by climatic factors. Desert plants. CLIMATE OF THE SANTA CATALINA MOUNTAINS. 65 curves show the averages between the south and north slopes for each station at each reading, being expressed in cubic centimeters of evapo- ration per day. Here again is brought out the pronounced fall in CO 110 ioo 90 80 70 60 50 40 30 20 10. Fig. 11.—Graphs showing seasonal march of evaporation rate at 6 altitudes in the Santa Cata- linas in 1911. Amounts are average daily losses from the atmometer, and each reading is the average of one on a north slope
. The vegetation of a desert mountain range as conditioned by climatic factors. Desert plants. CLIMATE OF THE SANTA CATALINA MOUNTAINS. 65 curves show the averages between the south and north slopes for each station at each reading, being expressed in cubic centimeters of evapo- ration per day. Here again is brought out the pronounced fall in CO 110 ioo 90 80 70 60 50 40 30 20 10. Fig. 11.—Graphs showing seasonal march of evaporation rate at 6 altitudes in the Santa Cata- linas in 1911. Amounts are average daily losses from the atmometer, and each reading is the average of one on a north slope and one on a south slope. rate which follows the advent of the summer rains and the cloudy and relatively humid weather by which they are accompanied. After the period of heavy rains by which the humid mid-summer was opened in the last days of June and early days of July there was a slight rise in evaporation, followed by a slight fall in late August and early September. The curves for 3,000 and 4,000 feet accompany each other closely after the first two readings, and the curves for 6,000 and 7,000 feet accompany each other closely throughout the summer. The curve for 8,000 feet stands always well apart from that for 7,000 feet. The grouping of these curves is, therefore, analogous to the natural subdivisions of the vegetation. The readings taken in the Desert region at 3,000 and 4,000 feet, those taken in the Encinal and the lower edge of the Forest at 5,000,6,000, and 7,000 feet, and the one series. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Shreve, Forrest, 1878-1950. Washington, D. C. , Carnegie Institution of Washington
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