As wind hits a mountain, it is forced upward and begins to cool. Cool air reaches its dew point more quickly, and the result is rain and snow. As the air crests the mountain and goes down the leeward slope, however, it has lost much of its moisture on the windward side.
What happens to dry air as it moves down the mountain?
Answer: It will happen is precipitation falls as the air rises over the mountains, the air will be dry as it sinks on the leeward size. This dry, sinking air causes a rainshadow effect , which creates many of the world’s deserts.
What happens when Chinook wind is drawn down the leeward slopes of the mountain range?
As a chinook wind is drawn down the leeward slopes of a mountain range, The air temperature rises. The saturation vapor pressure increases. The relative humidity decreases.
What is mountain barriers?
n. (Physical Geography) a series of adjoining mountains or of lines of mountains of similar origin.
Do mountains stop wind?
Mountains make a barrier for moving air. The wind pushes air, and clouds in the air, up the mountain slopes. The atmosphere is cooler at high elevations, and there is less of it: lower pressure makes it hard for lowland animals to get enough air to breathe.
What happens to warm moist air as it rises over the mountain?
If warm moist air rises, it will expand and cool. As it cools, the relative humidity will increase and water will condense. It can then fall back to the earth as precipitation. … As air rises, it expands because there is less atmospheric pressure at higher altitudes.
What happens with the temperature of air as it starts to rise?
As air warms up, the molecules start to vibrate and bump into each other, increasing the space around each molecule. … The opposite effect happens when air cools. As the temperature drops, molecules move more slowly, taking up less room. The amount of space the air takes up shrinks, or reduces the air pressure.
How does the foehn wind impact on human activities?
Foehn windstorms regularly cause damage to property and infrastructure, and are a serious hazard to climbers – most notoriously so on the Eiger’s north face. The combination of warm, dry air and high wind speeds promote the ignition and rapid spread of wildfires.
How often are Chinook Winds?
Chinooks are most prevalent over southern Alberta in Canada, especially in a belt from Pincher Creek and Crowsnest Pass through Lethbridge, which get 30–35 Chinook days per year, on average.
What is the coldest wind?
The coldest temperature recorded in the contiguous U.S. is 70 degrees below zero, measured at Rogers Pass, Montana, on Jan. 20, 1954. Speaking as a Canadian, we have learned that as the thermometer drops so does the wind speed. By around -50 C there is no wind so zero wind chill.