Airborne bacteria from ocean seeding clouds
finds Arctic Ocean currents and storms are moving bacteria from ocean algae
blooms into the atmosphere where the particles help clouds form. These
particles, which are biological in origin, can affect weather patterns
throughout the world, according to the new study in the American Geophysical
Union journal Geophysical Research Letters.
Particles suspended in air called aerosols can sometimes accelerate ice crystal formation in clouds, impacting weather patterns. Such ice-nucleating particles include dust, smoke, pollen, fungi and bacteria.Pure water droplets in clouds don't freeze until roughly minus 40 degrees Celsius (minus 40 degrees Fahrenheit). They are supercooled below their freezing point but still remain as liquid. Aerosols raise the base freezing temperature in supercooled clouds to minus five degrees Celsius, by providing a surface for water to crystalize on, and creating clouds mixed with supercooled droplets.
The Polar Regions are experiencing rapid warming
which could cause more algae blooms to get airborne and seed clouds.