'Like' thunder strikes on Wednesday and Thursday

The US scientists confirmed that mid-week two days is the period of thunder most often occurs.

Photo: LifeClever

After analyzing the data provided by the US National Thunder Detection System, Thomas Bell, a NASA weather expert, developed a graph of thunder in the United States from 1998 to 2006. He received In many areas, especially in the southeast, thunder often occurs in the middle of the week in the summer. Specifically, the number of thunder in the middle of the week is 10-20% higher than other days.

Some experts believe that air pollution is one of the causes of this situation. 'The number of vehicles in most cities on the planet has always been at its highest level on Wednesday and Thursday and air pollution has become the worst in these two days. We do not understand the creation of thunder and the pollution is related, but it is a very remarkable connection, ' Thomas said.

In a previous study, Thomas discovered the same rule in the states of the southeastern United States. He said that micro particles were freed from diesel engines by millions of trucks, creating tiny droplets in the clouds. The larger the number of microscopic particles, the higher the number of droplets.

Hot air flows from the ground can push water droplets to the higher air layer, forming towering clouds. If the droplets are pushed to a position high enough, they will freeze. 'The collision between water molecules separates the charged particles with opposite charges, a necessary condition for lightning to form,' Thomas said.

An expert at the California Institute of Technology, Dong Wu, said: 'The scientists have argued about the impact of aerosols (liquid with tiny solid particles floating inside) on the weather for years. We know there is a link between the amount of aerosols in the atmosphere and rainfall. It is a way that people affect the weather. '

A series of previous studies have shown that ground temperature, cloud formation and rainfall in the United States always follow a cycle of about a week in length. Experts also affirmed these cyclical phenomena related to human activity.