L3
讲座
1. What does the professor mainly discuss?
The effect of mountain ranges on the temperature of precipitation
The effects of orographic precipitation on mountain vegetation
Ways that land barriers can affect rates of precipitation in an area
Features of air masses that can increase precipitation in an area
2. The professor mentions convectional, frontal, and orographic precipitation. What do these three types of precipitation have in common?
They all require a collision of two masses of warm air.
They all require an air mass to rise and then cool.
They all require a cold air mass near the land’s surface.
They all require air masses to move long distances over land.
3. Why does the professor mention the Southern Alps of New Zealand?
To help define the phenomenon of convectional precipitation
To illustrate the potential difference in rainfall on opposite sides of a mountain range
To give an example of a mountain range with a rain shadow facing the ocean
To make a connection between wind speed and the intensity of precipitation
4. What are two possible consequences of orographic precipitation?（多选题）
It can cause the two sides of a mountain range to have different climates.
It can change the shape of a mountain.
It can slow the speed at which an air mass travels.
It can slow the rate at which rising hot air mixes with cooler air
5. What point does the professor make when he compares mountains and hills?
Some aspects of orographic precipitation remain mysterious to researchers.
Rain is more likely to fall on the crests of mountains than on the crests of hills.
Hills sometimes cause more orographic precipitation than mountains do.
The location of maximum rainfall depends on the size of the land barrier.
6. What is the professor’s opinion about research on orographic precipitation that was conducted in the 1950s?
It is still relevant today.
It would be difficult to replicate today.
It was too narrowly focused
It was not carried out systematically.
