When the Moon is high in the sky, it creates bulges in the planet's atmosphere that creates imperceptible changes in the amount of rain that falls below, researchers said.

"As far as I know, this is the first study to convincingly connect the tidal force of the Moon with
rainfall," said Tsubasa Kohyama, a doctoral student at the University of Washington.

Previous study by the researchers used a global grid of data to confirm that air pressure on the surface definitely varies with the phases of the Moon.

"When the Moon is overhead or underfoot, the air pressure is higher," Kohyama said.

The study is the first to show that the Moon's gravitational tug also puts a slight damper on the rain.

When the Moon is overhead, its gravity causes Earth's atmosphere to bulge towards it, so the pressure or weight of the atmosphere on that side of the planet goes up. Higher pressure increases the temperature of air parcels below. Since warmer air can hold more moisture, the same air parcels are now farther from their moisture capacity.

The relative humidity affects rain, he said, because 'lower humidity is less favourable for precipitation'.

The study was published in the journal Geophysical Research Letters.

Latest News from Lifestyle News Desk