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<br />t.rv Cg kg-I)
<br />1.0
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<br />COC)
<br />Snow-Surface Temperature
<br />
<br />Figure 1.10. The relations between snow-surface temperature and the dif-
<br />ference in vapor mixing ratio between the air and the snow surface, t. rv,
<br />at the lower boundary of the convective layer at different cloud-base
<br />height (dot-dashed lines). There is a lower limit of cloud-base height,
<br />beyond this limit t.rv will be negative, therefore, no moisture-driven
<br />convection can survive.
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