•Higher vapor pressure reduces transmission of IR
•Refracts/absorbs solar radiation
•Flux of water vapor proportional to (es –e); so, for given temperature, lower vapor pressure increases evaporation
•Compared to free air, vapor pressure is higher usually near mountain
–Reduces transmission of IR, which may increase temperature
–Lowers condensation level
–lowers drying power, i.e., ability to transfer water
from clothing/plants into atmosphere
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