First study to connect moon’s tidal force with rainfall

First study to connect moon’s tidal force with rainfall

A new research paper published in the Geophysical Research Letters has unveiled that the lunar forces affect the amount of rain on earth. Study researchers have affirmed that it is first study that has provided convincing link between the tidal force of the moon and the rainfall.

“As far as I know, this is the first study to convincingly connect the tidal force of the moon with rainfall”, affirmed the researchers. Study’s lead researcher Tsubasa Kohyama, a UW doctoral student in atmospheric sciences said that they were studying atmospheric waves when they noticed a slight oscillation in the air pressure. He along with study’s co-author John (Michael) Wallace, a UW professor of atmospheric sciences, have spent two years to know the phenomenon.

As per the satellite data, a slight decline has come in rainfall when the moon is directly overhead or underfoot. For the first time, air pressure changes when linked to the phases of the moon in 1847 and temperature in 1932 through ground-based observations.

The new research paper is the first one to show that the moon’s gravitational force also slightly affects rain. When the moon is positioned overhead then its gravity causes earth’s atmosphere to bulge toward it, making the pressure of the atmosphere on that side of the planet to go up.

The researchers have used 15 years of data collected by NASA and the Japan Aerospace Exploration Agency’s Tropical Rainfall Measuring Mission satellite from 1998 to 2012 to show that the rain is little less when the moon is higher.

The effect as per the researchers can be used to test climate models. The researchers have affirmed that they will continue to explore the topic to see whether certain categories of rain are more susceptible to the phases of the moon and also to know whether the frequency of rainstorms show any lunar connection.


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