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E HIEIT K <br /> 1110 CLIMATE <br /> • <br /> Specific Climatic Factors (cont.) <br /> TEMPERATURE (con t.) <br /> cold air drainage from the surrounding terrain. Hence, .empera- <br /> tures at the mine site are expected to be slightly lower than <br /> those observed at Paradox, although during periods of c1 --r, calm <br /> nights with exceptional radiation cooling, warmer tempera ures <br /> at the mine site could occur. This condition refers to t' e on- <br /> set of a temperature inversion. However, the temperature inver- <br /> sion is generally short-lived due to the daytime heating ►f the <br /> air mass lying in the valley. <br /> Oak GROWING SEASON <br /> • The length of the growing season can affect the succ.ssful <br /> establishment of a self-sustaining vegetative cover. To -void <br /> winter kill, certain plant species should be approaching .heir <br /> mature stage before the first freeze, whereas other plant species <br /> in their early stages of growth will withstand the effect- of <br /> temperatures lower than 32°F. The average lengths of the :rowing • <br /> season at Paradox with a light freeze and a strong freeze -re <br /> given in Table K2-2. <br /> PRECIPITATION <br /> Precipitation in the area of the mine site is influen ed <br /> significantly by the vertical extent and aspect of the to. •.raphic <br /> 141 features at and adjacent to it. The mountains of the Cont nental <br /> -2- <br /> r. <br />