Pollen affects cloud formation and precipitation patterns

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Pollen affects cloud formation and precipitation patterns
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Pollen not only plays a role in allergies, but also influences the local weather. Especially in spring, when large amounts are released, it contributes to the formation of ice in clouds, which can increase rainfall.

Ground-based and satellite observations in the United States show that increased pollen concentrations in spring lead to more cloud ice and more precipitation -- even at temperatures between minus 15 and minus 25 degrees Celsius."This is supported by laboratory results showing that pollen acts as an ice nucleus, influencing the freezing temperature of water in clouds and promoting precipitation," says meteorologist Dr Jan Kretzschmar, lead author of the study.

A further aspect of the study is the importance of biodiversity. Many plant species release large amounts of pollen at the same time each spring, which affects cloud formation and the amount of ice particles in the atmosphere. These interactions require further research to better understand the role of pollen in climate evolution and to incorporate this into future climate models.

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