weather and climate PPT

wind scale——————————风级 tornado——————————龙卷风 constant wind————————恒风 breeze————————————微风 headwind———————————逆风 trade wind——————————信风 moderate breeze———————和风 fresh breeze—————————清风 gale——————————————大风 strong breeze————————强风
When the sun's rays strike water surfaces,some of the water becomes absorbed by the air as water vapor.When the air has absorbed its maximum amount of vapor ,if the air is then cooled ,some of the vapor will condense and clouds will form ,then it rains.
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Weather is made up of atmospheric conditions during a few hours or days. The weather maybe rainy , sunny, snowy , cloudy on a certain day.
cloudy
Typhoon
Flood Drought Snow storm
• Typhoon is a category(种类) of tropical cyclones(热带气旋). In meteorology(气象学),it is defined by the World Meteorological Organization(世界气象组织): the center of the tropical cyclone with sustained winds reach 32.7 meters per second or more is known as the hurricane(飓风). The name of the hurricane in the North Atlantic and Eastern Pacific; the western North Pacific (north of the equator(赤道), west of the international date line(国际 日期线), longitude (东经) 100 degrees east) near-synonyms is called typhoons.
Wind is caused by air moving between cold and warm regions. The warm air around the equator rises,while the cold air near the poles sinks to the ground. When the surface pressure greater at the poles, and sends air toward the equator.
The eye of typhoon
• Long-term, no rain or little rain led to the phenomenon of soil and air dry.
• Do you still remember the heavy snow in 2008?
Fra Baidu bibliotek
snowy
rainy
sunny
Clouds can greatly affect the temperature of the earth's surface. When there are many clouds in the sky ,all of the sun's rays cannot reach the earth . The cloudy day ,then, will be cooler than the cloudless day.
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大陆性气候:Continental climate 温带海洋气候:Temperate zone marine climate 热带雨林气候:Tropical rainforest climate 热带草原气候:Savannah climate 热带荒漠气候:Tropical climate desertification 地中海式气候:Mediterranean climate 热带海洋性气候:Tropical marine climate 温带海洋性气候:Temperate marine climate 温带季风气候:Temperate monsoon climate 亚热带季风气候: Subtropical monsoon climate 温带大陆性湿润气候:Humid temperate continental climate 亚热带湿润气候:Subtropical humid climate 温带大陆性气候:Temperate continental climate
These clouds will contain drops of water at temperature above freezing , or ice crystals at temperatures below freezing.
Climate is the combination of temperature ,moisture ,and sunshine at a place over a period of many years . Temperature and the amount of rainfall are the two most important elements of climate. Others are humidity, cloudiness, fog ,sunshine ,wind ,storms, and air pressure.