|
STUDENTS:
Module 2: Decisions
Based on Science
Extreme Weather |
|
• Extreme Weather--Floods, hurricanes, tornadoes... just a few of the weather extremes that people experience. |
||||
|
Weather is the term that refers to the conditions of the atmosphere that we experience each day, while climate is the average of the day-to-day weather conditions over a long period of time. When examining a particular environment we tend to look at averages such as annual precipitation, average temperatures, and average wind speed and direction. What we miss sometimes are the extremes. The extremes occur infrequently and may not affect the average very much. For example, a particular
city's average rainfall may be 50 inches per year, but one storm could
drop 15 inches of rain and flood the city. When averaged over a ten
or twenty year period, this unusual occurrence may not stand out. |
|
|||
 |
Climates in the U.S. include low desert, high desert, subtropics, tundra, and temperate zones. Blizzards, tornadoes, hurricanes, droughts, and flooding can occur in many locations, but these types of severe weather are more common in some areas than others. Even Death Valley, California, occasionally experiences flooding and in Miami, Florida, residents have experienced heavy snow. These unusual weather occurrences are labeled "50 year or 100 year events." Such a designation doesn't mean that unusual events will come along every 50 years; it means that statistically, an event would be expected to occur only once in every 50 years. For example, an event could happen twice in a decade-then 90 years could possibly pass before it happens again. | |||
| Because
weather is so important to our lives, governments around the world spend
considerable effort and money to monitor it. The collected data, gathered
by thousands of weather stations around the globe, are placed in stored
databases and used in a variety of ways. For example, a weather broadcaster
would use these data when announcing that this was the hottest July 4th
in the community since 1957. Meteorologists can estimate weather conditions
on a given day and discover whether it rained under similar conditions
in previous years. They can also use the data to produce climate models
that provide better long-range forecasts. |
|
|
||
|
|
Vocabulary: weather
|
For
2003, the Atlantic hurricane names were...
Ana |
||
Click to return to the Enviro-TackleboxTM.
Click to return to the LPB Learning Port.
Click to return to LPB Interactive.
Go to Real Media to download your FREE player!