Have
you noticed the attention the weather has been getting in the media? The cold blast for much of the U.S. &
Canada, the trapped ship in the Antarctic, and the storms hitting Europe around
Christmas are just a few examples. Other
news reports that you may not have been aware were the floods in southern
Brazil and in the Caribbean, the heat wave in Argentina, the usually cold
weather in the Middle East. These are
all weather events.
Some
media outlets are reporting the cold events indicate that we have little to
fear from global warming. Yet global
warming does not cancel the seasons. In
fact what we know about our changing climate is to expect more weather extremes
worldwide. Not just heat waves, but
more floods, droughts, and even energized storm systems. This is how a changing climate translates into
daily weather.
Often
many in the media confuse the difference between weather and climate. Don’t worry, because some meteorologists do
too. The weather is basically composed
the events that unfold in the present.
Meanwhile climate looks at the long term average of weather. By definition this is a 30-year period. We can look at shorter term trends to look at
how changes are progressing, but we still have to look at the climate period of
30 years.