Global warming and lightning

THERE ARE many misbeliefs or misconceptions about lightning. Some say that lightning will never strike twice in the same place. Others think that lightning will always strike the highest point. Still others say that their home is safe because it has never been struck. The overconfident individual says that it will never happen to him/her.

Just exactly what do we know about lightning and how do we deal with it?

Perhaps the first thing we need to realize is that new research reveals that rising temperatures may increase the occurrence of lightning. According to studies made in Brazil, each degree of increase in global mean temperature will result in a 10- to 20-percent increase in the amount of lightning.

Why Brazil? In the last 10 years, Brazil has been the target of an estimated 57 million lightning strikes—the most in the world. Over 1,300 people have fallen victim to lightning in Brazil alone.

Lightning produced by strong storms also account for more forest fires which in turn release carbon dioxide fueling a continuous cycle.

A research institute estimates that 30 percent of all power outages are lightning-related with total costs approaching $1 billion.

How lightning is formed

Lightning comes from thunderclouds, which form when hot moist air rises into the atmosphere and condenses. Hot air rises when heated by the sun, carrying water vapor into the sky. As it rises, the hot air mingles with colder air, and the moisture condenses into water droplets.

Clouds are created when these water droplets become visible. The droplets increase in size as the cloud grows and becomes heavy falling down as rain. Thunderclouds are large masses that cover miles across at the base and reach 40,000 feet or more into the atmosphere.

Protection from lightning

A lightning protection system properly installed in accordance with the latest standard requirement is about 99 percent effective in preventing potential lightning damage. This specialized job is best done by a local established lightning protection installation company or contractor.

A properly installed lightning protector system intercepts the lightning bolt between cloud and earth and harmlessly conducts it to ground without damage.

Safety tips

Lightning always accompanies thunderstorms. Even if lightning is not visible where you are, if you can hear thunder you are close enough to be struck by lightning.

If you are caught outside, seek cover indoors immediately. First, try and seek a lightning protection facility. The next best option is a steel-framed structure or other type of enclosed building. Do not stand under a tree for cover. Taller objects are struck more frequently.

Avoid metal objects such as fences, bleachers or tall poles. If swimming or boating, seek shelter on land as quickly as possible. If caught in an open field, crouch low and keep your legs close together.

When inside a home or building, stay away from doors and windows. Avoid staying near electric outlets, appliances and equipment. If the thunderstorm is present, do not unplug TV’s telephones, stereos, or other electrical appliances. Stay away from plumbing, avoid running water and do not take a shower or bath. Do not use a corded telephone during a storm except for emergency purposes. –Amado de Jesus, Philippine Daily Inquirer

For comments or inquiries, e-mail amadodejesus@gmail.com.