When you
wake up in the morning, perhaps one of the first things you do is turn on
the radio or TV and check the weather report. “It’s going to be cold and
blustery today,” the weatherman says. “You better take your heavy coat.”
But why is
there no climate report?
It turns out
there is a great difference between weather and climate, although they are
related. The difference is time. Weather is measured in short periods of time.
It is happening now, tomorrow, this week. Climate is measured in long periods of time. Most climatologists (scientists who study the climate) look at weather
data for an area for 30 years before they have a good sense of the area’s
climate. In other words, climate is the big picture, and weather is all the
little details.
CLIMATE
Officially,
climate is defined as "the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years". Climatologists record and study the weather
every day over a period of 30 years or more to determine the climate of a
region.
Let’s take
New England for example. Today, the climate in this part of the country, simply
put, is cold and snowy in the winter, warming and rain in the spring, hot in the summer, cooling in the fall. In
colonial times, this climate actually helped the colonists because it stopped
the spread of disease, although it did make it difficult to have crops planted
year round and did cause much death in the winter.
Many
researchers believe that the climate is changing for the worse because of
human activity. This has not been proven though. It could just be a natural
cycle of the Earth.
WEATHER
On the other
hand, weather is “the
state of the atmosphere at a given time and place, with respect to variables such
as temperature, moisture, wind velocity, and barometric pressure”. The important part here is “a given time and
place”. It is what is happening here and now.
Staying with our New
England example, while the climate is the same in all parts of the region, the
weather differs from one part to another. This is why all local TV stations
have their own weather reports. For instance in Skowhegan, Maine it may be
sunny with a high of 28 degrees and winds at 13 mph, but in Hartford,
Connecticut it’s partly cloudy and a high of 36 (almost 10 degrees warmer) on
the same day.
While climate is a long
term view, weather is immediate. So when the weather forecast is given,
you should pay attention.