Question

How are mountain and valley breezes formed? Suppose there are two mountains, one covered with grass and another covered with barren rocks; would the temperature of the two mountain breezes be different? If so, how?

Answer 1

During the day, mountain slopes heat faster than the valley floor, so warm air rises and cooler valley air flows upslope, forming a valley breeze. At night, slopes cool faster and dense cold air sinks into the valley, forming a mountain breeze. Yes, the breezes would differ in temperature: grass-covered slopes are cooler by day and retain heat differently, while barren rocks heat rapidly by day and cool quickly at night, giving a stronger daily temperature contrast.