University of Michigan and Texas A & M researchers suggest that pollens can play a productive role when it comes to rain.

In the study that was made by Geophysical Research Letters it says that pollen grains from trees can make it rain.

It was indeed a surprising outcome as the pollen is more likely been ignored during cloud formation and give way to a man-made aerosols that cause pollution that is blamed on the rising temperatures relatively connected to global warming.

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"The grains were thought to be too large to be important in the climate system, too large to form clouds or interact with the sun's radiation, and also the large particles don't last in the atmosphere. They tend to settle out relatively quickly,” associate professor Allison Steiner said.

Researchers tested pollens that are known from allergic plants like oak, pecan, birch, cedar, pine trees and ragweed. Atomizer are used to make a spray of moist pollen fragments and sent the spray in a cloud-making chamber.

A nanometer-sized particles from different types of pollen have began to pull in moisture and form clouds as found by the team. Almost 10 to 20 percent of Americans are experiencing allergies due to seasonal pollen. The so-called thunderstorm asthma phenomenon fills up the emergency room with allergy sufferers after heavy rain.

One of the theories behind the unexplained trend is that thunderstorm has the ability to break pollen particles into smaller pieces and can cause severe allergy symptoms.

As a conclusion, the study showed that pollen does play a role to rupture in a cloud formation and does trigger new questions that pollens might fit into the larger climate picture. Field studies are considered in Michigan by next year.

TagsPollen Helps to Increase Rainfall Says New Study, pollen, pollen grain, rain, Rainfall, cloud formation, seasonal pollen, thunderstorm asthma phenomenon